BlackRock 2037 Municipal Target Term Trust

The information in this preliminary prospectus is not complete and may be changed. We may not sell these securities until the Registration Statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell these securities and is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED MARCH 26, 2026

LOGO

PRELIMINARY BASE PROSPECTUS

[●] Shares

BlackRock 2037 Municipal Target Term Trust

Common Shares of Beneficial Interest

Rights to Purchase Common Shares

BlackRock 2037 Municipal Target Term Trust (the “Trust”) is a diversified, closed-end management investment company. The Trust’s investment objectives are to provide current income that is exempt from regular federal income tax (but which may be subject to the federal alternative minimum tax in certain circumstances) and to return $25.00 per common share (the initial public offering price per common share) to holders of common shares on or about September 30, 2037. There can be no assurance that the Trust’s investment objectives, including to return $25.00 per common share to the holders of common shares on or about September 30, 2037, will be achieved or that the Trust’s investment program will be successful.

We may offer, from time to time, in one or more offerings, up to [●] of our common shares of beneficial interest, par value $0.001 per share (“common shares”). We may also offer subscription rights to purchase our common shares. Common shares may be offered at prices and on terms to be set forth in one or more supplements to this Prospectus (each, a “Prospectus Supplement”). You should read this Prospectus and the applicable Prospectus Supplement carefully before you invest in our common shares.

Our common shares may be offered directly to one or more purchasers, including existing shareholders in a rights offering, through agents designated from time to time by us, or to or through underwriters or dealers. The Prospectus Supplement relating to the offering will identify any agents or underwriters involved in the sale of our common shares, and will set forth any applicable purchase price, fee, commission or discount arrangement between us and our agents or underwriters, or among our underwriters, or the basis upon which such amount may be calculated. The Prospectus Supplement relating to any offering of rights will set forth the number of common shares issuable upon the exercise of each right (or number of rights) and the other terms of such rights offering. We may not sell any of our common shares through agents, underwriters or dealers without delivery of a Prospectus Supplement describing the method and terms of the particular offering of our common shares.

Our common shares are listed on the New York Stock Exchange (“NYSE”) under the symbol “BMN.” The last reported sale price of our common shares, as reported by the NYSE on [●], 2026 was $[●] per common share. The net asset value of our common shares at the close of business on [●], 2026 was $[●] per common share. Rights issued by the Trust may also be listed on a securities exchange.

Investing in the Trust’s common shares involves certain risks, including risks of leverage, that are described in the “Risks” section beginning on page 36 of this Prospectus.

Shares of closed-end management investment companies frequently trade at a discount to their net asset value. The Trust’s common shares have traded at a discount to net asset value in recent periods. If the Trust’s common shares trade at a discount to their net asset value, the risk of loss may increase for purchasers in a public offering.

Neither the Securities and Exchange Commission (“SEC”) nor any state securities commission has approved or disapproved these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

This Prospectus is part of a registration statement that we have filed with the SEC using the “shelf” registration process. Under the shelf registration process, we may offer, from time to time, separately or together in one or more offerings, the securities described in this Prospectus. The securities may be offered at prices and on terms described in one or more supplements to this Prospectus. This Prospectus provides you with a general description of the securities that we may offer. Each time we use this Prospectus to offer securities, we will provide a Prospectus Supplement that will contain specific information about the terms of that offering. The Prospectus Supplement may also add, update or change information contained in this Prospectus. This Prospectus, together with any Prospectus Supplement, sets forth concisely the information about the Trust that a prospective investor should know before investing. You should read this Prospectus and applicable Prospectus Supplement, which contain important information, before deciding whether to invest in the common shares. You should retain this Prospectus and applicable Prospectus Supplement for future reference. A Statement of Additional Information (“SAI”), dated [●], 2026, containing additional information about the Trust, has been filed with the SEC and, as amended from time to time, is incorporated by reference in its entirety into this Prospectus. You may call (800) 882-0052, visit the Trust’s website (http://www.blackrock.com) or write to the Trust to obtain, free of charge, copies of the SAI and the Trust’s semi-annual and annual reports, as well as to obtain other information about the Trust or to make shareholder inquiries. The SAI, as well as the Trust’s semi-annual and annual reports, are also available for free on the SEC’s website (http://www.sec.gov). You may also e-mail requests for these documents to [email protected]. Information contained in, or that can be accessed through, the Trust’s website is not part of this Prospectus.

You should not construe the contents of this Prospectus as legal, tax or financial advice. You should consult with your own professional advisors as to the legal, tax, financial or other matters relevant to the suitability of an investment in the Trust.

The Trust’s common shares do not represent a deposit or an obligation of, and are not guaranteed or endorsed by, any bank or other insured depository institution, and are not federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

Prospectus dated [●], 2026

TABLE OF CONTENTS


	Page
PROSPECTUS SUMMARY		1
SUMMARY OF TRUST EXPENSES		6
FINANCIAL HIGHLIGHTS		8
SENIOR SECURITIES		10
USE OF PROCEEDS		11
THE TRUST		11
DESCRIPTION OF SHARES		11
THE TRUST’S INVESTMENTS		15
LEVERAGE		30
RISKS		36
HOW THE TRUST MANAGES RISKS		49
MANAGEMENT OF THE TRUST		49
NET ASSET VALUE		53
DISTRIBUTIONS		57
DIVIDEND REINVESTMENT PLAN		57
RIGHTS OFFERINGS		59
TAX MATTERS		60
TAXATION OF HOLDERS OF RIGHTS		61
CERTAIN PROVISIONS IN THE AMENDED AND RESTATED AGREEMENT AND DECLARATION OF TRUST AND BYLAWS		63
CLOSED-END FUND STRUCTURE		65
REPURCHASE OF COMMON SHARES		65
PLAN OF DISTRIBUTION		65
INCORPORATION BY REFERENCE		67
PRIVACY PRINCIPLES OF THE TRUST		67

You should rely only on the information contained in, or incorporated by reference into, this Prospectus and any related Prospectus Supplement in making your investment decisions. The Trust has not authorized any person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. The Trust is not making an offer to sell the common shares in any jurisdiction where the offer or sale is not permitted. You should assume that the information in this Prospectus and any Prospectus Supplement is accurate only as of the dates on their covers. The Trust’s business, financial condition and prospects may have changed since the date of its description in this Prospectus or the date of its description in any Prospectus Supplement.

PROSPECTUS SUMMARY

This is only a summary of certain information relating to BlackRock 2037 Municipal Target Term Trust. This summary may not contain all of the information that you should consider before investing in our common shares. You should consider the more detailed information contained in the Prospectus and in any related Prospectus Supplement and in the Statement of Additional Information (the “SAI”) before purchasing common shares.


The Trust		BlackRock 2037 Municipal Target Term Trust is a diversified, closed-end management investment company. Throughout this Prospectus, we refer to BlackRock 2037 Municipal Target Term Trust simply as the “Trust” or as “we,” “us” or “our.” See “The Trust.” The Trust’s common shares of beneficial interest, par value $0.001 per share (“common shares”), are listed for trading on the New York Stock Exchange (“NYSE”) under the symbol “BMN.” As of [●], 2026, the net assets of the Trust were $[●], the total assets of the Trust were $[●] and the Trust had [●] common shares outstanding. The last reported sale price of the Trust’s common shares, as reported by the NYSE on [●], 2026 was $[●] per common share. The net asset value (“NAV”) of the Trust’s common shares at the close of business on [●], 2026 was $[●] per common share. See “Description of Shares.” Rights issued by the Trust may also be listed on a securities exchange.

The Offering		We may offer, from time to time, in one or more offerings, up to [●] of our common shares on terms to be determined at the time of the offering. We may also offer subscription rights to purchase our common shares. The common shares may be offered at prices and on terms to be set forth in one or more Prospectus Supplements. You should read this Prospectus and the applicable Prospectus Supplement carefully before you invest in our common shares. Our common shares may be offered directly to one or more purchasers, through agents designated from time to time by us, or to or through underwriters or dealers. The offering price per common share will not be less than the NAV per common share at the time we make the offering, exclusive of any underwriting commissions or discounts, provided that rights offerings that meet certain conditions may be offered at a price below the then current NAV. See “Rights Offerings.” The Prospectus Supplement relating to the offering will identify any agents, underwriters or dealers involved in the sale of our common shares, and will set forth any applicable purchase price, fee, commission or discount arrangement between us and our agents or underwriters, or among our underwriters, or the basis upon which such amount may be calculated. See “Plan of Distribution.” The Prospectus Supplement relating to any offering of rights will set forth the number of common shares issuable upon the exercise of each right (or number of rights) and the other terms of such rights offering. We may not sell any of our common shares through agents, underwriters or dealers without delivery of a Prospectus Supplement describing the method and terms of the particular offering of our common shares.

Use of Proceeds		The net proceeds from the issuance of common shares hereunder will be invested in accordance with our investment objectives and policies as appropriate investment opportunities are identified, which is expected to be substantially completed in approximately three months from the date on which the proceeds from an offering are received by the Trust; however, the identification of appropriate investment opportunities pursuant to the Trust’s investment style or changes in market conditions could result in the Trust’s


		anticipated investment period extending to as long as six months. See “Use of Proceeds.”

Investment Objectives and Policies		Please refer to the section of the Trust’s most recent annual report on Form N-CSR entitled “Investment Objectives, Policies and Risks”, which is incorporated by reference herein, for a discussion of the Trust’s investment objectives and policies.

Term Trust		The Trust seeks to return $25.00 per common share to holders of common shares on or about September 30, 2037 (when the Trust will terminate unless (i) a majority of the Trust’s Board of Trustees (the “Board”) and 75% of each class of outstanding shares voting as a separate class of the Trust approve an amendment to the Trust’s Amended and Restated Agreement and Declaration of Trust to extend the Trust’s termination date or (ii) 80% of the Trust’s Board approves an earlier termination date) by actively managing its portfolio of municipal obligations, which will have an average final maturity on or about such date, and by retaining each year a portion of its net investment income, but continuing to maintain its status as a regulated investment company for federal income tax purposes. There is no assurance that the Trust will be able to achieve its investment objective of returning $25.00 per common share to holders of common shares on or about September 30, 2037.

Leverage		The Trust uses leverage to seek to achieve its investment objectives. The Trust’s use of leverage may increase or decrease from time to time in its discretion and the Trust may, in the future, determine not to use leverage. The Trust currently leverages its assets through the use of preferred shares (“preferred shares”) and by investing in leveraged residual certificates issued by tender option bond (“TOB”) trusts (“TOB Residuals”). Under the Investment Company Act, the Trust is permitted to issue preferred shares in an amount up to 50% of its Managed Assets (100% of its net assets), borrow money (including by investing in TOB Residuals) or issue debt securities in an amount up to 33 1/3% of its Managed Assets (50% of its net assets) and enter into derivative instruments with leverage embedded in them in a limited manner or subject to a limit on leverage risk calculated based on value-at-risk, as required by Rule 18f-4 under the Investment Company Act. Although it has no present intention to do so, the Trust reserves the right to borrow money from banks or other financial institutions, or issue debt securities, in the future if it believes that market conditions would be conducive to the successful implementation of a leveraging strategy through borrowing money or issuing debt securities. The use of leverage creates an opportunity for increased common share net investment income dividends, but also creates risks for the holders of common shares. “Managed Assets” means the total assets of the Trust (including any assets attributable to money borrowed for investment purposes) minus the sum of the Trust’s accrued liabilities (other than money borrowed for investment purposes). See “Leverage.” The Trust has leveraged its portfolio by issuing Series W-7 Variable Rate Demand Preferred Shares, $100,000 liquidation preference per share (“VRDP Shares”). Under the Investment Company Act, the Trust is not permitted to issue preferred shares if, immediately after such issuance, the liquidation value of Trust’s outstanding preferred shares exceeds 50% of its assets (including the proceeds from the issuance) less liabilities other than borrowings (i.e., the value of the Trust’s assets must be at least 200% of the liquidation value of its outstanding preferred shares). In addition, the Trust would not be permitted to declare any cash dividend or other distribution on its common shares unless, at the time of such declaration, the value of the


		Trust’s assets less liabilities other than borrowings is at least 200% of such liquidation value. See “Leverage—Preferred Shares.”

		As part of its leverage strategy, the Trust may invest in TOB Residuals. The TOB Residuals in which the Trust invests pay interest or income that, in the opinion of counsel to the issuer, is exempt from regular federal income tax. The Advisor will not conduct its own analysis of the tax status of the interest or income paid by TOB Residuals held by the Trust, but will rely on the opinion of counsel to the issuer. Although volatile, TOB Residuals typically offer the potential for yields exceeding the yields available on fixed rate municipal bonds with comparable credit quality, coupon, call provisions and maturity. See “Leverage—Tender Option Bond Transactions.” For the fiscal year ended December 31, 2025, the average liquidation value of the VRDP Shares outstanding was $50,000,000 and the annualized dividend rate on the VRDP Shares was 3.85%. The use of leverage is subject to numerous risks. When leverage is employed, the Trust’s NAV, the market price of the common shares and the yield to holders of common shares will be more volatile than if leverage were not used. For example, a rise in short-term interest rates generally will cause the Trust’s NAV to decline more than if the Trust had not used leverage. A reduction in the Trust’s NAV may cause a reduction in the market price of the Trust’s common shares. The Trust cannot assure you that the use of leverage will result in a higher yield on the Trust’s common shares. In addition, because the Trust’s investment management fee is calculated as a percentage of the Trust’s Managed Assets, which include those assets purchased with leverage, during periods in which the Trust is using leverage, the fee paid to the Advisor will be higher than if the Trust did not use leverage. Any leveraging strategy the Trust employs may not be successful.

Investment Advisor		BlackRock Advisors, LLC acts as the Trust’s investment adviser. The Advisor receives an annual fee, payable monthly, in an amount equal to 0.55% of the average daily value of the Trust’s Managed Assets. See “Management of the Trust—Investment Advisor.”

Distributions		The Trust intends to make regular monthly cash distributions of all or a portion of its net investment income, after payment of dividends on the Trust’s VRDP Shares outstanding, to holders of the Trust’s common shares. Net capital gains, if any, will be distributed at least annually to holders of the Trust’s common shares. The Trust’s net investment income consists of all interest income accrued on portfolio assets less all expenses of the Trust. The Trust is required to allocate net capital gains and other taxable income, if any, received by the Trust among its shareholders on a pro rata basis in the year for which such capital gains and other income is realized. The Trust currently intends to retain, until the final liquidating distribution, a portion of its net investment income, but continue to maintain its status as a regulated investment company for federal income tax purposes. Such retained income may constitute a portion of the liquidating distribution returned to investors on or about September 30, 2037. Various factors will affect the level of the Trust’s income, including the asset mix, the amount of leverage utilized by the Trust and the effects thereof and the Trust’s use of hedging. To permit the Trust to maintain a more stable monthly distribution or to facilitate the Trust’s attempt to retain over time sufficient net investment income to cause the Trust’s net asset value to be at


		least $25.00 per share on or about September 30, 2037, the Trust may from time to time distribute less than the entire amount of tax-exempt interest income earned in a particular period. The undistributed tax-exempt interest income would be available to supplement future distributions. As a result, the distributions paid by the Trust for any particular monthly period may be more or less than the amount of tax-exempt interest income actually earned by the Trust during the period. Undistributed tax-exempt interest income will add to the Trust’s net asset value and, correspondingly, distributions from undistributed tax-exempt interest income will deduct from the Trust’s net asset value. The Trust’s income and distributions may decline over the term of the Trust as the dollar weighted average maturity of the Trust’s portfolio securities shorten. The likelihood of this risk may increase as the Trust approaches its term. The Trust expects that a final liquidating distribution will be made to shareholders on or before the termination of the Trust. Shareholders will automatically have all dividends and distributions reinvested in common shares of the Trust in accordance with the Trust’s dividend reinvestment plan unless an election is made to receive cash by contacting the Reinvestment Plan Agent (as defined herein) at (800) 699-1236. However, some shareholders may buy shares through brokers that do not participate in the Trust’s dividend reinvestment plan. See “Dividend Reinvestment Plan.” The Trust reserves the right to change its distribution policy and the basis for establishing the rate of its monthly distributions at any time and may do so without prior notice to common shareholders. See “Distributions.”

Listing		The Trust’s common shares are listed on the NYSE under the symbol “BMN.” See “Description of Shares—Common Shares.”

Custodian and Transfer Agent		State Street Bank and Trust Company serves as the Trust’s custodian, and Computershare Trust Company, N.A. serves as the Trust’s transfer agent.

Administrator		State Street Bank and Trust Company serves as the Trust’s administrator and fund accountant.

Market Price of Shares		Common shares of closed-end investment companies frequently trade at prices lower than their NAV. The Trust cannot assure you that its common shares will trade at a price higher than or equal to NAV. See “Use of Proceeds.” The Trust’s common shares trade in the open market at market prices that are a function of several factors, including dividend levels (which are in turn affected by expenses), NAV, call protection for portfolio securities, portfolio credit quality, liquidity, dividend stability, relative demand for and supply of the common shares in the market, general market and economic conditions, market sentiment and other factors. See “Leverage,” “Risks,” “Description of Shares” and “Repurchase of Common Shares.” The common shares are designed primarily for long-term investors and you should not purchase common shares of the Trust if you intend to sell them shortly after purchase.

Special Risk Considerations		An investment in common shares of the Trust involves risk. Please refer to the section of the Trust’s most recent annual report on Form N-CSR entitled “Investment Objectives, Policies and Risks—Risk Factors”, which is incorporated by reference herein, for a discussion of the risks of investing in the Trust. You should carefully consider those risks, which are described in

SUMMARY OF TRUST EXPENSES


Shareholder Transaction Expenses
Sales load paid by you (as a percentage of offering price)⁽¹⁾			1.00%
Offering expenses borne by the Trust (as a percentage of offering price)⁽¹⁾			0.09%
Dividend reinvestment plan fees			$0.02 per share for open-market purchases of common shares⁽²⁾
Dividend reinvestment plan sale transaction fee			$2.50⁽²⁾
Estimated Annual Expenses (as a percentage of net assets attributable to common shares)
Management Fees⁽³⁾⁽⁴⁾			0.76%
Other Expenses⁽⁵⁾			1.40%
Miscellaneous Other Expenses			0.10%
Interest Expense⁽⁶⁾			1.30%
Acquired Fund Fees and Expenses⁽⁷⁾			0.01%
Total Annual Expenses⁽⁷⁾			2.17%
Fee Waivers and/or Expense Reimbursements⁽⁴⁾			—
Total Annual Expenses After Fee Waivers and/or Expense Reimbursements⁽⁴⁾			2.17%

(1)	If the common shares are sold to or through underwriters, the Prospectus Supplement will set forth any applicable sales load and the estimated offering expenses. Trust shareholders will pay all offering expenses involved with an offering.

(2)

Computershare Trust Company, N.A.’s (the “Reinvestment Plan Agent”) fees for the handling of the reinvestment of dividends will be paid by the Trust. However, you will pay a $0.02 per share fee incurred in connection with open-market purchases, which will be deducted from the value of the dividend. You will also be charged a $2.50 sales fee and pay a $0.15 per share fee if you direct the Reinvestment Plan Agent to sell your common shares held in a dividend reinvestment account. Per share fees include any applicable brokerage commissions the Reinvestment Plan Agent is required to pay.

(3)

The Trust currently pays the Advisor an annual fee, payable monthly, in an amount equal to 0.55% of the average daily value of the Trust’s Managed Assets. “Managed Assets” means the total assets of the Trust (including any assets attributable to money borrowed for investment purposes) minus the sum of the Trust’s accrued liabilities (other than money borrowed for investment purposes).

(4)

The Trust and the Advisor have entered into a fee waiver agreement (the “Fee Waiver Agreement”), pursuant to which the Advisor has contractually agreed to waive the management fee with respect to any portion of the Trust’s assets attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds (“ETFs”) managed by the Advisor or its affiliates and other exchange-traded products sponsored by the Advisor or its affiliates, in each case that have a contractual management fee, through June 30, 2027. In addition, pursuant to the Fee Waiver Agreement, the Advisor has contractually agreed to waive its management fees by the amount of investment advisory fees the Trust pays to the Advisor indirectly through its investment in money market funds managed by the Advisor or its affiliates, through June 30, 2027. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Trust (upon the vote of a majority of the Trustees who are not “interested persons” (as defined in the Investment Company Act) of the Trust (the “Independent Trustees”) or a majority of the outstanding voting securities of the Trust), upon 90 days’ written notice by the Trust to the Advisor.

(5)	Other Expenses are based on estimated amounts for the current fiscal year.

(6)

The total expense table includes interest expense associated with the Trust’s investments in TOB Residuals (also known as “inverse floaters”). Although such interest expense is actually paid by special purpose vehicles in which the Trust invests, it is recorded on the Trust’s financial statements for accounting purposes. The total expense table also includes, in interest expense, dividends associated with the VRDP Shares, because the VRDP Shares are considered debt of the Trust for financial reporting purposes. The Trust uses leverage to seek to enhance its returns to common shareholders. This leverage generally takes two forms: the issuance of VRDP Shares and investment in TOB Residuals. Both forms of leverage benefit common shareholders if the cost of the leverage is lower than the returns earned by the Trust when it invests the proceeds from the leverage. In order to help you better understand the costs associated with the Trust’s leverage strategy, the Total Annual Expenses After Fee Waivers and/or Expense Reimbursements (excluding interest expense) are 0.87%.

(7)	The Total Annual Expenses do not correlate to the ratios of expenses to average net assets in the Trust’s most recent annual report, which do not include Acquired Fund Fees and Expenses.

The following example illustrates the expenses (including the sales load of $10.00 and offering costs of $0.81) that you would pay on a $1,000 investment in common shares, assuming (i) the Fee Waiver Agreement described above is only in effect for the first year, since it expires on June 30, 2027, and (ii) a 5% annual return:


	One Year		Three Years		Five Years		Ten Years
Total expenses incurred	$	33	$	78	$	126	$	259

The example should not be considered a representation of future expenses. The example assumes that the estimated “Other Expenses” set forth in the Estimated Annual Expenses table are accurate, that the rate listed under Total Annual Expenses remains the same each year and that all dividends and distributions are reinvested at NAV. Actual expenses may be greater or less than those assumed. Moreover, the Trust’s actual rate of return may be greater or less than the hypothetical 5% return shown in the example.

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the Trust’s financial performance for the periods presented. Certain information reflects financial results for a single common share of the Trust. The information for the fiscal years ended December 31, 2025, 2024 and 2023 and the fiscal period ended December 31, 2022 has been audited by [_____], independent registered public accounting firm for the Trust. The report of [_____] is included in the Trust’s December 31, 2025 annual report, is incorporated by reference into the Prospectus and SAI and can be obtained by shareholders. The Trust’s financial statements are included in the Trust’s annual report and are incorporated by reference into the Prospectus and SAI.

(For a share outstanding throughout each period)


	BMN
	Year Ended 12/31/25			Year Ended 12/31/24			Year Ended 12/31/23			Period from 10/28/22(a) to 12/31/22
Net asset value, beginning of period	$	25.72		$	26.20		$	25.42		$	25.00
Net investment income^(b)		1.12			1.07			1.05			0.11
Net realized and unrealized gain (loss)		0.05			(0.42	)		0.86			0.31
Net increase from investment operations		1.17			0.65			1.91			0.42
Distributions to Common Shareholders^(c)
From net investment income		(1.10	)		(1.09	)		(1.13	)		—
From net realized gain		—			(0.02	)		—			—
Return of capital		(0.03	)		(0.02	)		—			—
Total distributions to Common Shareholders		(1.13)			(1.13)			(1.13)			—

Net asset value, end of period	$	25.76		$	25.72		$	26.20		$	25.42

Market price, end of period	$	26.18		$	25.59		$	23.78		$	24.44

Total Return Applicable to Common Shareholders^(d)
Based on net asset value		4.76%			2.72%			7.97%			1.68%^(e)
Based on market price		7.01%			12.60%			1.92%			(2.24)%^(e)

Ratios to Average Net Assets Applicable to Common Shareholders^(f)
Total expenses		2.16%			1.00%			0.72%			0.65%^(g)(h)
Total expenses after fees waived and/or reimbursed		2.16%			1.00%			0.72%			0.61%^(g)(h)
Total expenses after fees waived and/or reimbursed and excluding interest expense and fees and amortization of offering costs⁽ⁱ⁾		0.86%			0.70%			0.67%			0.61%^(h)
Net investment income to Common Shareholders		4.40%			4.11%			4.11%			2.60%^(h)

Supplemental Data
Net assets applicable to Common Shareholders, end of period (000)	$	158,355		$	158,112		$	161,045		$	156,247
VRDP Shares outstanding at $100,000 liquidation value, end of period (000)	$	50,000		$	—		$	—		$	—
Asset coverage per VRDP Shares at $100,000 liquidation value, end of period	$	256,369^(j)		$	—		$	—		$	—
TOB Trust Certificates, end of period (000)	$	51,270		$	12,335		$	12,335		$	—
Asset coverage per $1,000 of TOB Trust Certificates, end of period	$	5,062		$	13,818		$	14,056			N/A
Portfolio turnover rate		23%			7%			20%			38%

(a)	Commencement of operations.

(b)	Based on average Common shares outstanding.

(c)	Distributions for annual periods determined in accordance with U.S. federal income tax regulations.

(d)	Total returns based on market price, which can be significantly greater or less than the net asset value, may result in substantially different returns. Where applicable, excludes the effects of any sales charges and assumes the reinvestment of distributions at actual reinvestment prices.

(e)	Not annualized.

(f)	Excludes fees and expenses incurred indirectly as a result of investments in underlying funds.

(g)	Audit and printing costs were not annualized in the calculation of the expense ratios. If these expenses were annualized, the total expenses and total expenses after fees waived and/or reimbursed would have been 0.80% and 0.76%.

(h)	Annualized.

(i)	Interest expense and fees and amortization of offering costs related to TOB Trusts and/or VRDP Shares.

(j)	Calculated by subtracting the Trust’s total liabilities (not including VRDP Shares and TOBs) from the Trust’s total assets and dividing this by the sum of the amount of TOBs and liquidation value of the VRDP Shares, and by multiplying the results by 100,000.

SENIOR SECURITIES

The following table sets forth information regarding the Trust’s outstanding senior securities as of the end of December 31, 2025, 2024 and 2023. There were no senior securities outstanding as of December 31, 2022. The Trust’s audited financial statements, including [ ] Report of Independent Registered Public Accounting Firm, and accompanying notes to financial statements, are included in the Trust’s annual report to shareholders for the fiscal year ended December 31, 2025.


Fiscal Year/Period Ended*	Total Amount Outstanding (000)		Asset Coverage			Liquidating Preference Per Unit

VRDP Shares

December 31, 2025	$	50,000	$	256,369	^(a)	$	100,000

TOB Trust Certificates

December 31, 2025		51,270		5,062			N/A

December 31, 2024		12,335		13,818			N/A

December 31, 2023		12,335		14,056			N/A

*	There were no VRDP Shares outstanding as of December 31, 2024, 2023 and 2022.

(a)	Calculated by subtracting the Trust’s total liabilities (not including VRDP Shares and TOBs) from the Trust’s total assets and dividing this by the sum of the amount of TOBs and liquidation value of the VRDP Shares, and by multiplying the results by 100,000.

USE OF PROCEEDS

The net proceeds from the issuance of common shares hereunder will be invested in accordance with the Trust’s investment objectives and policies as stated below. We currently anticipate that we will be able to invest all of the net proceeds in accordance with our investment objectives and policies within approximately three months from the date on which the proceeds from an offering are received by the Trust; however, the identification of appropriate investment opportunities pursuant to the Trust’s investment style or changes in market conditions could result in the Trust’s anticipated investment period extending to as long as six months. Pending such investment, it is anticipated that the proceeds will be invested in short-term, tax-exempt or taxable investment grade securities.

THE TRUST

The Trust is a diversified, closed-end management investment company registered under the Investment Company Act. The Trust was organized as a Maryland statutory trust on November 16, 2020, pursuant to a Certificate of Trust, governed by the laws of the State of Maryland. The Trust’s principal office is located at 100 Bellevue Parkway, Wilmington, Delaware 19809, and its telephone number is (800) 882-0052.

The Trust commenced operations on [●], upon the initiation of an initial public offering of [●] of its common shares. The proceeds of such offering were approximately $[●] after the payment of organizational and offering expenses. On [●], the Trust issued an additional [●] common shares pursuant to an over-allotment provision for net proceeds, after expenses, to the Trust of approximately $[●]. The Trust’s common shares are traded on the NYSE under the symbol “BMN.”

DESCRIPTION OF SHARES

Common Shares

[The Trust is authorized to issue an unlimited number of common shares of beneficial interest, par value $0.001 per share. Each common share has one vote and, when issued and paid for in accordance with the terms of this offering, will be fully paid and, under the Maryland Statutory Trust Act, the purchasers of the common shares will have no obligation to make further payments for the purchase of the common shares or contributions to the Trust solely by reason of their ownership of the common shares, except that the Board of Trustees of the Trust (the “Board”) shall have the power, as frequently as they may determine, to cause shareholders to pay certain expenses of the Trust by setting off charges due from shareholders from declared but unpaid dividends or distributions owed the shareholders and/or by reducing the number of common shares owned by each respective shareholder. If and whenever preferred shares are outstanding, the holders of common shares will not be entitled to receive any distributions from the Trust unless all accrued dividends on preferred shares have been paid, unless asset coverage (as defined in the Investment Company Act) with respect to preferred shares would be at least 200% after giving effect to the distributions and unless certain other requirements imposed by any rating agencies rating the preferred shares have been met. See “Description of Shares—Preferred Shares” in the SAI. All common shares are equal as to dividends, assets and voting privileges and have no conversion, appraisal, preemptive or other subscription rights. The Trust will send annual and semi-annual reports, including financial statements, to all holders of its shares.]

Unlike open-end funds, closed-end funds like the Trust do not continuously offer shares and do not provide daily redemptions. Rather, if a shareholder determines to buy additional common shares or sell shares already held, the shareholder may do so by trading through a broker on the NYSE or otherwise. Shares of closed-end investment companies frequently trade on an exchange at prices lower than NAV. Shares of closed-end investment companies like the Trust have during some periods traded at prices higher than NAV and during other periods have traded at prices lower than NAV. Because the market value of the common shares may be influenced by such factors as dividend levels (which are in turn affected by expenses), call protection on its portfolio securities, dividend stability, portfolio credit quality, the Trust’s NAV, relative demand for and supply of such shares in the market, general market and economic conditions, market sentiment and other factors beyond the control of the Trust, the Trust cannot assure you that its common shares will trade at a price equal to or higher than NAV in the future. The common shares are designed primarily for long-term investors and you should not purchase the common shares if you intend to sell them soon after purchase. See “Repurchase of Common Shares” below and “Repurchase of Common Shares” in the SAI.

The Trust’s outstanding common shares are, and when issued, the common shares offered by this Prospectus will be, publicly held and listed and traded on the NYSE under the symbol “BMN.” The Trust determines its NAV on a daily basis. The following table sets forth, for the quarters indicated, the highest and lowest daily closing prices on the NYSE per common share, and the NAV per common share and the premium to or discount from NAV, on the date of each of the high and low market prices. The table also sets forth the number of common shares traded on the NYSE during the respective quarters.


During Quarter Ended	NYSE Market Price Per Common Share				NAV Per Common Share on Date of Market Price				Premium/(Discount) on Date of Market Price				Trading Volume
	High		Low		High		Low		High		Low
March 31, 2026	$	[●]	$	[●]	$	[●]	$	[●]		[●]%		[●]%		[●]
December 31, 2025	$	26.18	$	24.65	$	25.76	$	25.89		1.63%		(4.79)%		919,970
September 30, 2025	$	25.20	$	24.00	$	25.44	$	24.69		(0.94)%		(2.79)%		785,082
June 30, 2025	$	25.35	$	23.59	$	25.50	$	24.81		(0.59)%		(4.92)%		883,189
March 31, 2025	$	25.87	$	25.05	$	25.77	$	25.56		0.39%		(1.99)%		715,617
December 31, 2024	$	25.77	$	24.61	$	26.21	$	25.87		(1.68)%		(4.87)%		871,857
September 30, 2024	$	25.57	$	24.46	$	26.32	$	25.98		(2.85)%		(5.85)%		1,031,538
June 30, 2024	$	24.95	$	23.80	$	25.95	$	25.75		(3.85)%		(7.57)%		1,001,952
March 31, 2024	$	24.36	$	23.58	$	26.12	$	25.95		(6.74)%		(9.13)%		1,560,667

As of [●], 2026, the NAV per common share of the Trust was $[●] and the market price per common share was $[•], representing a [premium/discount] to NAV of [●]%. [Common shares of the Trust have historically traded at both a premium and discount to NAV.]

Preferred Shares

The Amended and Restated Agreement and Declaration of Trust provides that the Board may authorize and issue preferred shares, with rights as determined by the Board, by action of the Board without the approval of the holders of the common shares. Under the Investment Company Act, the Trust is permitted to have outstanding more than one series of Preferred Shares so long as no single series has a priority over another series as to the distribution of assets of the Trust or the payment of dividends. Holders of common shares have no preemptive right to purchase any preferred shares that might be issued. The Trust is authorized to issue an unlimited number of preferred shares of beneficial interest, par value $0.001 per share. The Trust has issued 500 Series W-7 Variable Rate Demand Preferred Shares (previously defined as “VRDP Shares”).

Distribution Preference and Liquidation Preference. The VRDP Shares rank prior to the Trust’s common shares as to the payment of dividends by the Trust, and distribution of assets upon dissolution, liquidation or winding up of the Trust. The Investment Company Act prohibits the declaration of any dividend on the Trust’s common shares or the repurchase of the Trust’s common shares if the Trust fails to maintain asset coverage of at least 200% of the liquidation preference of the Trust’s outstanding VRDP Shares. In addition, pursuant to the Trust’s Statement of Preferences governing the VRDP Shares (the “Statement of Preferences”), the Trust is restricted from declaring and paying dividends on classes of shares ranking junior to or on parity with the VRDP Shares or repurchasing such shares if the Trust fails to declare and pay dividends on the VRDP Shares, redeem any VRDP Shares required to be redeemed under the Statement of Preferences or comply with the basic maintenance amount requirement of the ratings agencies rating the VRDP Shares.

Voting Rights. The holders of the VRDP Shares have voting rights equal to the voting rights of the holders of the common shares (one vote per share) and will vote together with holders of the common shares (one vote per share) as a single class on certain matters. However, the holders of outstanding preferred shares, including the VRDP Shares, voting as a separate class, are also entitled to elect two trustees to the Board at all times. Holders of VRDP Shares are also entitled to elect a majority of the Trust’s Board as provided in the Statement of Preferences if dividends on the VRDP Shares are not paid for a period of two years. Holders of VRDP Shares are also generally entitled to a separate class vote to amend the Statement of Preferences. In addition, the Investment Company Act requires the approval of the holders of a majority of any outstanding VRDP Shares, voting as a separate class, to (a) adopt any plan of reorganization that would adversely affect the VRDP Shares, (b) change the Trust’s sub-classification as a closed-end

investment company or change its fundamental investment restrictions or (c) change its business so as to cease to be an investment company.

Redemption, Purchase and Sale of VRDP Shares. The Trust is required to redeem its VRDP Shares on the maturity date, unless earlier redeemed or repurchased. Six months prior to the maturity date, the Trust is required to begin to segregate liquid assets with the Trust’s custodian to fund the redemption. In addition, the Trust is required to redeem certain of its outstanding VRDP Shares if it fails to comply with certain asset coverage, basic maintenance amount or leverage requirements. Subject to certain conditions, the VRDP Shares may also be redeemed, in whole or in part, at any time at the option of the Trust. The redemption price per VRDP Share is equal to the liquidation preference per share plus any outstanding unpaid dividends.

Liquidity Feature. The VRDP Shares are subject to a fee agreement between the Trust and the liquidity provider that requires a per annum liquidity fee and, in some cases, an upfront or initial commitment fee, payable to the liquidity provider. As of December 31, 2025, the fee agreement is set to expire, unless renewed or terminated in advance, on October 20, 2028. The VRDP Shares are also subject to a purchase agreement in connection with the liquidity feature. In the event a purchase agreement is not renewed or is terminated in advance, and the VRDP Shares do not become subject to a purchase agreement with an alternate liquidity provider, the VRDP Shares will be subject to mandatory purchase by the liquidity provider prior to the termination of the purchase agreement. In the event of such mandatory purchase, the Trust is required to redeem the VRDP Shares six months after the purchase date. Immediately after such mandatory purchase, the Trust is required to begin to segregate liquid assets with its custodian to fund the redemption. There is no assurance that the Trust will replace such redeemed VRDP Shares with any other preferred shares or other form of leverage.

Please see “Description of Shares” in the SAI for more information.

Authorized and Outstanding Shares

The following table provides the Trust’s authorized shares and common shares and preferred shares outstanding as of March 1, 2026.


Title of Class	Amount Authorized	Amount Held by Trust or for its Account		Amount Outstanding Exclusive of Amount held by Trust or for its Account
Common Shares	Unlimited		0		6,147,653
Preferred Shares	Unlimited		0		500
Series W-7 VRDP Shares	500		0		500

THE TRUST’S INVESTMENTS

Investment Objectives and Policies

Please refer to the section of the Trust’s most recent annual report on Form N-CSR entitled “Investment Objectives, Policies and Risks—Investment Objectives and Policies”, which is incorporated by reference herein, for a discussion of the Trust’s investment objectives and policies.

Description of Municipal Securities

Set forth below is a detailed description of the municipal securities in which the Trust invests. Information with respect to ratings assigned to tax exempt obligations that the Trust may purchase is set forth in Exhibit A to the SAI. Obligations are included within the term “municipal securities” if the interest paid thereon is excluded from gross income for federal income tax purposes in the opinion of bond counsel to the issuer.

Municipal securities include debt obligations issued to obtain funds for various public purposes, including the construction of a wide range of public facilities, refunding of outstanding obligations and obtaining funds for general operating expenses and loans to other public institutions and facilities. In addition, certain types of private activity bonds (“PABs”) (or industrial development bonds, under pre-1986 law) are issued by or on behalf of public authorities to finance various privately owned or operated facilities, including among other things, airports, public ports, mass commuting facilities, multi-family housing projects, as well as facilities for water supply, gas, electricity, sewage or solid waste disposal and other specialized facilities. Other types of PABs, the proceeds of which are used for the construction, equipment or improvement of privately operated industrial or commercial facilities, may constitute municipal securities. The interest on municipal securities may bear a fixed rate or be payable at a variable or floating rate. The two principal classifications of municipal securities are “general obligation” bonds and “revenue” bonds, which latter category includes PABs. Municipal securities typically are issued to finance public projects, such as roads or public buildings, to pay general operating expenses or to refinance outstanding debt. Municipal securities may also be issued for private activities, such as housing, medical and educational facility construction, or for privately owned industrial development and pollution control projects. General obligation bonds are backed by the full faith and credit, or taxing authority, of the issuer and may be repaid from any revenue source. Revenue bonds may be repaid only from the revenues of a specific facility or source. Municipal securities may be issued on a long-term basis to provide permanent financing. The repayment of such debt may be secured generally by a pledge of the full faith and credit taxing power of the issuer, a limited or special tax, or any other revenue source, including project revenues, which may include tolls, fees and other user charges, lease payments and mortgage payments. Municipal securities may also be issued to finance projects on a short-term interim basis, anticipating repayment with the proceeds of the later issuance of long-term debt.

The municipal securities in which the Trust invests pay interest or income that, in the opinion of bond counsel to the issuer, is exempt from regular Federal income tax. The Advisor does not conduct its own analysis of the tax status of the interest or income paid by municipal securities held by the Trust, but will rely on the opinion of counsel to the issuer of each such instrument. The Trust may also invest in municipal securities issued by United States Territories (such as Puerto Rico or Guam) that are exempt from regular Federal income tax. In addition to the types of municipal securities described in this Prospectus, the Trust may invest in other securities that pay interest or income that is, or make other distributions that are, exempt from regular Federal income tax and/or state and local personal taxes, regardless of the technical structure of the issuer of the instrument. The Trust treats all of such tax-exempt securities as municipal securities.

The yields on municipal securities are dependent on a variety of factors, including prevailing interest rates and the condition of the general money market and the municipal security market, the size of a particular offering, the maturity of the obligation and the rating of the issue. The market value of municipal securities will vary with changes in interest rate levels and as a result of changing evaluations of the ability of bond issuers to meet interest and principal payments.

The Trust has not established any limit on the percentage of its portfolio that may be invested in PABs. The Trust may not be a suitable investment for investors who are already subject to the federal alternative minimum tax or who would become subject to the federal alternative minimum tax as a result of an investment in the Trust’s Shares.

General Obligation Bonds. General obligation bonds are typically secured by the issuer’s pledge of its faith, credit and taxing power for the repayment of principal and the payment of interest. The taxing power of any governmental entity may be limited, however, by provisions of its state constitution or laws, and an entity’s creditworthiness will depend on many factors, including potential erosion of its tax base due to population declines, natural disasters, declines in the state’s industrial base or inability to attract new industries, economic limits on the ability to tax without eroding the tax base, state legislative proposals or voter initiatives to limit ad valorem real property taxes and the extent to which the entity relies on federal or state aid, access to capital markets or other factors beyond the state’s or entity’s control. Accordingly, the capacity of the issuer of a general obligation bond as to the timely payment of interest and the repayment of principal when due is affected by the issuer’s maintenance of its tax base.

Revenue Bonds. Revenue or special obligation bonds are typically payable only from the revenues derived from a particular facility or class of facilities or, in some cases, from the proceeds of a special excise tax or other specific revenue sources such as payments from the user of the facility being financed. Accordingly, the timely payment of interest and the repayment of principal in accordance with the terms of the revenue or special obligation bond is a function of the economic viability of such facility or such revenue source. Revenue bonds issued by state or local agencies to finance the development of low-income, multi-family housing involve special risks in addition to those associated with municipal securities generally, including that the underlying properties may not generate sufficient income to pay expenses and interest costs. Such bonds are generally non-recourse against the property owner, may be junior to the rights of others with an interest in the properties, may pay interest that changes based in part on the financial performance of the property, may be prepayable without penalty and may be used to finance the construction of housing developments which, until completed and rented, do not generate income to pay interest. Increases in interest rates payable on senior obligations may make it more difficult for issuers to meet payment obligations on subordinated bonds.

Municipal Notes. Municipal notes are shorter term municipal debt obligations. They may provide interim financing in anticipation of tax collection, bond sales or revenue receipts. If there is a shortfall in the anticipated proceeds, repayment on the note may be delayed or the note may not be fully repaid, and the Trust may lose money.

Municipal Commercial Paper. Municipal commercial paper is generally unsecured and issued to meet short-term financing needs. The lack of security presents some risk of loss to the Trust since, in the event of an issuer’s bankruptcy, unsecured creditors are repaid only after the secured creditors out of the assets, if any, that remain.

Moral Obligation Bonds. Municipal securities may also include “moral obligation” bonds, which are normally issued by special purpose public authorities. If an issuer of moral obligation bonds is unable to meet its obligations, the repayment of such bonds becomes a moral commitment but not a legal obligation of the state or municipality in question.

Municipal Lease Obligations. Also included within the general category of municipal securities are certificates of participation (“COPs”) issued by government authorities or entities to finance the acquisition or construction of equipment, land and/or facilities. COPs represent participations in a lease, an installment purchase contract or a conditional sales contract (hereinafter collectively called “lease obligations”) relating to such equipment, land or facilities. Municipal leases, like other municipal debt obligations, are subject to the risk of non-payment. Although lease obligations do not constitute general obligations of the issuer for which the issuer’s unlimited taxing power is pledged, a lease obligation is frequently backed by the issuer’s covenant to budget for, appropriate and make the payments due under the lease obligation. However, certain lease obligations contain “non-appropriation” clauses which provide that the issuer has no obligation to make lease or installment purchase payments in future years unless money is appropriated for such purpose on a yearly basis. Although “non-appropriation” lease obligations are secured by the leased property, disposition of the property in the event of foreclosure might prove difficult and the value of the property may be insufficient to pay lease obligations. Certain investments in lease obligations may be illiquid.

Zero-Coupon Bonds. Municipal securities may include zero-coupon bonds. Zero-coupon bonds are securities that are sold at a discount to par value and do not pay interest during the life of the security. The discount approximates the total amount of interest the security will accrue and compound over the period until maturity at a rate of interest

reflecting the market rate of the security at the time of issuance. Upon maturity, the holder of a zero-coupon bond is entitled to receive the par value of the security.

While interest payments are not made on such securities, holders of such securities are deemed to have received income (“phantom income”) annually, notwithstanding that cash may not be received currently. The effect of owning instruments that do not make current interest payments is that a fixed yield is earned not only on the original investment but also, in effect, on all discount accretion during the life of the obligations. This implicit reinvestment of earnings at a fixed rate eliminates the risk of being unable to invest distributions at a rate as high as the implicit yield on the zero-coupon bond, but at the same time eliminates the holder’s ability to reinvest at higher rates in the future. For this reason, some of these securities may be subject to substantially greater price fluctuations during periods of changing market interest rates than are comparable securities that pay interest currently. Longer term zero-coupon bonds are more exposed to interest rate risk than shorter term zero-coupon bonds. These investments benefit the issuer by mitigating its need for cash to meet debt service, but also require a higher rate of return to attract investors who are willing to defer receipt of cash.

The Trust accrues income with respect to these securities for U.S. federal income tax and accounting purposes prior to the receipt of cash payments. Zero-coupon bonds may be subject to greater fluctuation in value and less liquidity in the event of adverse market conditions than comparably rated securities that pay cash interest at regular intervals.

Further, to maintain its qualification for pass-through treatment under the federal tax laws, the Trust is required to distribute income to its shareholders and, consequently, may have to dispose of other, more liquid portfolio securities under disadvantageous circumstances or may have to leverage itself by borrowing in order to generate the cash to satisfy these distributions. The required distributions may result in an increase in the Trust’s exposure to zero-coupon bonds.

In addition to the above-described risks, there are certain other risks related to investing in zero-coupon bonds. During a period of severe market conditions, the market for such securities may become even less liquid. In addition, as these securities do not pay cash interest, the Trust’s investment exposure to these securities and their risks, including credit risk, will increase during the time these securities are held in the Trust’s portfolio.

Pre-Refunded Municipal Securities. The principal of, and interest on, pre-refunded municipal securities are no longer paid from the original revenue source for the securities. Instead, the source of such payments is typically an escrow fund consisting of U.S. Government securities. The assets in the escrow fund are derived from the proceeds of refunding bonds issued by the same issuer as the pre-refunded municipal securities. Issuers of municipal securities use this advance refunding technique to obtain more favorable terms with respect to securities that are not yet subject to call or redemption by the issuer. For example, advance refunding enables an issuer to refinance debt at lower market interest rates, restructure debt to improve cash flow or eliminate restrictive covenants in the indenture or other governing instrument for the pre-refunded municipal securities.

However, except for a change in the revenue source from which principal and interest payments are made, the pre-refunded municipal securities remain outstanding on their original terms until they mature or are redeemed by the issuer.

PABs. The Trust may purchase municipal securities classified as PABs. Interest received on certain PABs is treated as an item of “tax preference” for purposes of the federal alternative minimum tax and may impact the overall tax liability of certain investors in the Trust. PABs, formerly referred to as industrial development bonds, are issued by, or on behalf of, states, municipalities or public authorities to obtain funds to provide privately operated housing facilities, airport, mass transit or port facilities, sewage disposal, solid waste disposal or hazardous waste treatment or disposal facilities and certain local facilities for water supply, gas or electricity. Other types of PABs, the proceeds of which are used for the construction, equipment, repair or improvement of privately operated industrial or commercial facilities, may constitute municipal securities, although the federal tax laws may place substantial limitations on the size of such issues. Such bonds are secured primarily by revenues derived from loan repayments or lease payments due from the entity which may or may not be guaranteed by a parent company or otherwise secured. PABs generally are not secured by a pledge of the taxing power of the issuer of such bonds. Therefore, an investor should be aware that repayment of such bonds generally depends on the revenues of a private entity and be aware of the risks that such an investment may entail. The continued ability of an entity to generate sufficient revenues for the payment of principal and interest on such bonds will be affected by many factors including the size of the entity, capital structure, demand

for its products or services, competition, general economic conditions, government regulation and the entity’s dependence on revenues for the operation of the particular facility being financed.

The ability of issuers of municipal leases to make timely lease payments may be adversely impacted in general economic downturns and as relative governmental cost burdens are allocated and reallocated among federal, state and local governmental units. Such non-payment would result in a reduction of income to the Trust, and could result in a reduction in the value of the municipal lease experiencing non-payment and a potential decrease in the NAV of the Trust. Issuers of municipal lease obligations might seek protection under the bankruptcy laws. In the event of bankruptcy of such an issuer, the Trust could experience delays and limitations with respect to the collection of principal and interest on such municipal leases and the Trust may not, in all circumstances, be able to collect all principal and interest to which it is entitled. To enforce its rights in the event of a default in lease payments, the Trust might take possession of and manage the assets securing the issuer’s obligations on such securities, which may increase the Trust’s operating expenses and adversely affect the NAV of the Trust. When the lease contains a non-appropriation clause, however, the failure to pay would not be a default and the Trust would not have the right to take possession of the assets. Any income derived from the Trust’s ownership or operation of such assets may not be tax-exempt or may fail to generate qualifying income for purposes of the income tests applicable to regulated investment companies (“RICs”). In addition, the Trust’s intention to qualify as a RIC under the Code may limit the extent to which the Trust may exercise its rights by taking possession of such assets, because as a RIC the Trust is subject to certain limitations on its investments and on the nature of its income.

[As a result of tax legislation enacted in 2017 and made permanent in 2025, the number of taxpayers subject to AMT has decreased significantly. However, changes to AMT exemption phaseout thresholds beginning in 2026 may increase the number of taxpayers subject to AMT in future years. Investors should consult their tax advisors regarding their individual circumstances.]

Special Taxing Districts. Special taxing districts are organized to plan and finance infrastructure developments to induce residential, commercial and industrial growth and redevelopment. The bond financing methods such as tax increment finance, tax assessment, special services district and Mello-Roos bonds (a type of municipal security established by the Mello-Roos Community Facilities Act of 1982), are generally payable solely from taxes or other revenues attributable to the specific projects financed by the bonds without recourse to the credit or taxing power of related or overlapping municipalities. They often are exposed to real estate development-related risks and can have more taxpayer concentration risk than general tax-supported bonds, such as general obligation bonds. Further, the fees, special taxes, or tax allocations and other revenues that are established to secure such financings are generally limited as to the rate or amount that may be levied or assessed and are not subject to increase pursuant to rate covenants or municipal or corporate guarantees. The bonds could default if development failed to progress as anticipated or if larger taxpayers failed to pay the assessments, fees and taxes as provided in the financing plans of the districts.

When-Issued Securities, Delayed Delivery Securities and Forward Commitments. The Trust may purchase or sell securities that it is entitled to receive on a when-issued basis. The Trust may also purchase or sell securities on a delayed delivery basis. The Trust may also purchase or sell securities through a forward commitment. These transactions involve the purchase or sale of securities by the Trust at an established price with payment and delivery taking place in the future. The purchase will be recorded on the date the Trust enters into the commitment and the value of the securities will thereafter be reflected in the Trust’s NAV. The Trust has not established any limit on the percentage of its assets that may be committed in connection with these transactions.

There can be no assurance that a security purchased on a when-issued basis will be issued or that a security purchased or sold through a forward commitment will be delivered. A default by a counterparty may result in the Trust missing the opportunity of obtaining a price considered to be advantageous. The value of securities in these transactions on the delivery date may be more or less than the Trust’s purchase price. The Trust may bear the risk of a decline in the value of the security in these transactions and may not benefit from an appreciation in the value of the security during the commitment period.

If deemed advisable as a matter of investment strategy, the Trust may dispose of or renegotiate a commitment after it has been entered into, and may sell securities it has committed to purchase before those securities are delivered to the Trust on the settlement date. In these cases the Trust may realize a taxable capital gain or loss.

When the Trust engages in when-issued, delayed delivery or forward commitment transactions, it relies on the other party to consummate the trade. Failure of such party to do so may result in the Trust’s incurring a loss or missing an opportunity to obtain a price considered to be advantageous.

The market value of the securities underlying a commitment to purchase securities, and any subsequent fluctuations in their market value, is taken into account when determining the market value of the Trust starting on the day the Trust agrees to purchase the securities. The Trust does not earn interest on the securities it has committed to purchase until they are paid for and delivered on the settlement date.

Rule 18f-4 under the Investment Company Act permits the Trust to enter into when-issued or forward-settling securities (e.g., firm and standby commitments, including to-be-announced (“TBA”) commitments, and dollar rolls) and non-standard settlement cycle securities notwithstanding the limitation on the issuance of senior securities in Section 18 of the Investment Company Act, provided that the Trust intends to physically settle the transaction and the transaction will settle within 35 days of its trade date (the “Delayed-Settlement Securities Provision”). If a when-issued, forward-settling or non-standard settlement cycle security does not satisfy the Delayed-Settlement Securities Provision, then it is treated as a derivatives transaction under Rule 18f-4.

Yields. Yields on municipal securities are dependent on a variety of factors, including the general condition of the money market and of the municipal security market, the size of a particular offering, the financial condition of the issuer, the maturity of the obligation and the rating of the issue. The ability of the Trust to achieve its investment objective is also dependent on the continuing ability of the issuers of the securities in which the Trust invests to meet their obligations for the payment of interest and principal when due. There are variations in the risks involved in holding municipal securities, both within a particular classification and between classifications, depending on numerous factors. Furthermore, the rights of owners of municipal securities and the obligations of the issuer of such municipal securities may be subject to applicable bankruptcy, insolvency and similar laws and court decisions affecting the rights of creditors generally and to general equitable principles, which may limit the enforcement of certain remedies.

“High Yield” or “Junk” Bonds. The Trust may invest up to 35% of its Managed Assets in municipal securities that are rated, at the time of investment, below investment grade quality (rated Ba/BB or below by Moody’s, S&P or Fitch) or securities that are unrated but judged to be of comparable quality by the Advisor. Such securities, sometimes referred to as “high yield” or “junk” bonds, are predominantly speculative with respect to the capacity to pay interest and repay principal in accordance with the terms of the security, generally involve a greater volatility of price than securities in higher rating categories and substantial risk of loss, and are susceptible to default or decline in market value due to adverse economic and business developments.

Other Investment Companies

The Trust may invest up to 10% of its total assets in securities of other investment companies, including open-end or closed-end investment companies that invest primarily in municipal securities of the types in which the Trust may invest directly. The Trust generally expects to invest in other investment companies either during periods when it has large amounts of uninvested cash, or during periods when there is a shortage of attractive, high-yielding municipal securities available in the market. As a shareholder in an investment company, the Trust will bear its ratable share of that investment company’s expenses, and will remain subject to payment of the Trust’s advisory and other fees and expenses with respect to assets so invested. Holders of Shares will therefore be subject to duplicative expenses to the extent the Trust invests in other investment companies. The Advisor will take expenses into account when evaluating the investment merits of an investment in an investment company relative to available municipal securities investments. In addition, the securities of other investment companies may also be leveraged and will therefore be subject to the same leverage risks to which the Trust is subject. As described in this prospectus in the sections entitled “Risks” and “Leverage,” the net asset value of leveraged shares will be more volatile and the yield to shareholders will tend to fluctuate more than the yield generated by unleveraged shares. Investment companies may have investment policies that differ from those of the Trust. In addition, to the extent the Trust invests in other investment companies, the Trust will be dependent upon the investment and research abilities of persons other than the Advisor. The Trust treats its investments in such open- or closed-end investment companies as investments in municipal securities.

Tax-Exempt Preferred Securities

The Trust may also invest up to 10% of its total assets in preferred interests of other investment funds that pay dividends that are exempt from regular federal income tax. A portion of such dividends may be capital gain distributions subject to federal capital gains tax. Such funds, in turn, invest in municipal securities and other assets that generally pay interest or make distributions that are exempt from regular federal income tax, such as revenue bonds issued by state or local agencies to fund the development of low-income, multi-family housing. Investing in such tax-exempt preferred shares involves many of the same issues as investing in other open-end or closed-end investment companies as discussed above. These investments also have additional risks, including liquidity risk, the absence of regulation governing investment practices, capital structure and leverage, affiliated transactions and other matters, and concentration of investments in particular issuers or industries. The Trust will treat investments in tax-exempt preferred shares as investments in municipal securities.

Short-Term Debt Securities; Temporary Defensive Positions; Invest-Up or Wind-Down Period

During temporary defensive periods (e.g., times when, in the Advisor’s opinion, temporary imbalances of supply and demand or other temporary dislocations in the tax-exempt securities market adversely affect the price at which long-term or intermediate-term municipal securities are available, or in connection with the termination of the Trust), and in order to keep cash on hand fully invested, including (i) the period during which the net proceeds of this offering are being invested or (ii) the period of time preceding the Trust’s termination, the Trust may invest any percentage of its assets in liquid, short-term investments including high quality, short-term securities which may be either tax-exempt or taxable and securities of other open-end or closed-end investment companies that invest primarily in municipal securities of the type in which the Trust may invest directly. The Trust intends to invest in taxable short-term investments only in the event that suitable tax-exempt temporary investments are not available at reasonable prices and yields. Tax-exempt temporary investments include various obligations issued by state and local governmental issuers, such as tax-exempt notes (bond anticipation notes, tax anticipation notes and revenue anticipation notes or other such municipal securities maturing in three years or less from the date of issuance), municipal commercial paper and variable rate demand obligations (“VRDOs”). The Trust’s expectation is that it will invest only in taxable temporary investments which are U.S. Government securities or securities rated within the highest grade by Moody’s, S&P or Fitch, and which mature within one year from the date of purchase or carry a variable or floating rate of interest. Taxable temporary investments of the Trust may include certificates of deposit issued by U.S. banks with assets of at least $1 billion, commercial paper or corporate notes, bonds or debentures with a remaining maturity of one year or less, or repurchase agreements. To the extent the Trust invests in taxable investments, the Trust will not at such times be in a position to achieve its investment objective of tax-exempt income.

Strategic Transactions

The Trust may purchase and sell futures contracts, enter into various interest rate transactions and swap contracts (including, but not limited to, credit default swaps) and may purchase and sell exchange-listed and OTC put and call options on securities and swap contracts, financial indices and futures contracts and use other derivative instruments or management techniques (collectively, “Strategic Transactions”). These Strategic Transactions may be used for duration management and other risk management purposes, subject to the Trust’s investment restrictions. While the Trust’s use of Strategic Transactions is intended to reduce the volatility of the NAV of the Trust’s Shares, the NAV of the Trust’s Shares will fluctuate. No assurance can be given that the Trust’s Strategic Transactions will be effective. There is no particular strategy that requires use of one technique rather than another as the decision to use any particular strategy or instrument is a function of market conditions and the composition of the portfolio. The ability of the Trust to use Strategic Transactions successfully will depend on the Advisor’s ability to predict pertinent market movements as well as sufficient correlation among the instruments, which cannot be assured. Strategic Transactions subject the Trust to the risk that, if the Advisor incorrectly forecasts market values, interest rates or other applicable factors, the Trust’s performance could suffer. Certain of these Strategic Transactions, such as investments in inverse floating rate securities and credit default swaps, may provide investment leverage to the Trust’s portfolio. The Trust is not required to use derivatives or other portfolio strategies to seek to hedge its portfolio and may choose not to do so.

The use of Strategic Transactions may result in losses greater than if they had not been used, may require the Trust to sell or purchase portfolio securities at inopportune times or for prices other than current market values, may limit the amount of appreciation the Trust can realize on an investment or may cause the Trust to hold a security that it might

otherwise sell. Furthermore, the Trust may only engage in Strategic Transactions from time to time and may not necessarily be engaging in hedging activities when movements in interest rates occur.

The Trust’s investment objectives and the requirements of Subchapter M of the Code for qualification as a regulated investment company may restrict or affect the ability of the Trust to engage in Strategic Transactions. In addition, the use of certain Strategic Transactions may give rise to taxable income and have certain other consequences, such as subjecting a portion of the Trust’s dividends to regular federal income tax. However, under normal circumstances, the Fund does not intend to use Strategic Transactions that give rise to taxable income.

Financial Futures Transactions and Options. The Trust is authorized to purchase and sell certain exchange traded financial futures contracts (“financial futures contracts”) in order to hedge its investments against declines in value, and to hedge against increases in the cost of securities it intends to purchase or to seek to enhance the Trust’s return. However, any transactions involving financial futures or options (including puts and calls associated therewith) will be in accordance with the Trust’s investment policies and limitations. A financial futures contract obligates the seller of a contract to deliver and the purchaser of a contract to take delivery of the type of financial instrument covered by the contract, or in the case of index-based futures contracts to make and accept a cash settlement, at a specific future time for a specified price. To hedge its portfolio, the Trust may take an investment position in a futures contract which will move in the opposite direction from the portfolio position being hedged. A sale of financial futures contracts may provide a hedge against a decline in the value of portfolio securities because such depreciation may be offset, in whole or in part, by an increase in the value of the position in the financial futures contracts. A purchase of financial futures contracts may provide a hedge against an increase in the cost of securities intended to be purchased because such appreciation may be offset, in whole or in part, by an increase in the value of the position in the futures contracts.

Distributions, if any, of net long-term capital gains from certain transactions in futures or options are taxable at long-term capital gains rates for U.S. federal income tax purposes.

Futures Contracts. A futures contract is an agreement between two parties to buy and sell a security or, in the case of an index-based futures contract, to make and accept a cash settlement for a set price on a future date. A majority of transactions in futures contracts, however, do not result in the actual delivery of the underlying instrument or cash settlement, but are settled through liquidation, i.e., by entering into an offsetting transaction. Futures contracts have been designed by boards of trade which have been designated “contracts markets” by the CFTC.

The purchase or sale of a futures contract differs from the purchase or sale of a security in that no price or premium is paid or received. Instead, an amount of cash or securities acceptable to the broker and the relevant contract market, which varies, but is generally about 5% of the contract amount, must be deposited with the broker. This amount is known as “initial margin” and represents a “good faith” deposit assuring the performance of both the purchaser and seller under the futures contract. Subsequent payments to and from the broker, called “variation margin,” are required to be made on a daily basis as the price of the futures contract fluctuates making the long and short positions in the futures contract more or less valuable, a process known as “marking to the market.” At any time prior to the settlement date of the futures contract, the position may be closed out by taking an opposite position that will operate to terminate the position in the futures contract. A final determination of variation margin is then made, additional cash is required to be paid to or released by the broker and the purchaser realizes a loss or gain. In addition, a nominal commission is paid on each completed sale transaction.

The Trust may also purchase and sell financial futures contracts on U.S. Government securities as a hedge against adverse changes in interest rates as described below. The Trust may purchase and write call and put options on futures contracts on U.S. Government securities and purchase and sell municipal security index futures contracts in connection with its hedging strategies.

The Trust also may engage in other futures contracts transactions such as futures contracts on other municipal bond indices that may become available if the Advisor should determine that there is normally a sufficient correlation between the prices of such futures contracts and the municipal securities in which the Trust invests to make such hedging appropriate.

Futures Strategies. The Trust may sell a financial futures contract (i.e., assume a short position) in anticipation of a decline in the value of its investments resulting from an increase in interest rates or otherwise. The risk of decline

could be reduced without employing futures as a hedge by selling investments and either reinvesting the proceeds in securities with shorter maturities or by holding assets in cash. This strategy, however, entails increased transaction costs in the form of dealer spreads and typically would reduce the average yield of the Trust’s portfolio securities as a result of the shortening of maturities. The sale of futures contracts provides an alternative means of hedging against declines in the value of its investments. As such values decline, the value of the Trust’s positions in the futures contracts will tend to increase, thus offsetting all or a portion of the depreciation in the market value of the Trust’s investments that are being hedged. While the Trust will incur commission expenses in selling and closing out futures positions, commissions on futures transactions are typically lower than transaction costs incurred in the purchase and sale of the Trust’s investments being hedged. In addition, the ability of the Trust to trade in the standardized contracts available in the futures markets may offer a more effective defensive position than a program to reduce the average maturity of the portfolio securities due to the unique and varied credit and technical characteristics of the instruments available to the Trust. Employing futures as a hedge also may permit the Trust to assume a defensive posture without reducing the yield on its investments beyond any amounts required to engage in futures trading.

When the Trust intends to purchase a security, the Trust may purchase futures contracts as a hedge against any increase in the cost of such security resulting from a decrease in interest rates or otherwise, that may occur before such purchase can be effected. Subject to the degree of correlation between such securities and futures contracts, subsequent increases in the cost of such securities should be reflected in the value of the futures held by the Trust. As such purchases are made, an equivalent amount of futures contracts will be closed out. Due to changing market conditions and interest rate forecasts, however, a futures position may be terminated without a corresponding purchase of portfolio securities.

Call Options on Futures Contracts. The Trust may also purchase and sell exchange traded call and put options on financial futures contracts. The purchase of a call option on a futures contract is analogous to the purchase of a call option on an individual security. Depending on the pricing of the option compared to either the futures contract upon which it is based or the price of the underlying securities, it may or may not be less risky than ownership of the futures contract or underlying securities. Like the purchase of a futures contract, the Trust may purchase a call option on a futures contract to hedge against a market advance when the Trust is not fully invested.

The writing of a call option on a futures contract constitutes a partial hedge against declining prices of the securities which are deliverable upon exercise of the futures contract. If the futures price at expiration is below the exercise price, the Trust will retain the full amount of the option premium, which provides a partial hedge against any decline that may have occurred in the Trust’s portfolio holdings.

Put Options on Futures Contracts. The purchase of a put option on a futures contract is analogous to the purchase of a protective put option on portfolio securities. The Trust may purchase a put option on a futures contract to hedge the Trust’s portfolio against the risk of rising interest rates.

The writing of a put option on a futures contract constitutes a partial hedge against increasing prices of the securities which are deliverable upon exercise of the futures contract. If the futures price at expiration is higher than the exercise price, the Trust will retain the full amount of the option premium, which provides a partial hedge against any increase in the price of securities which the Trust intends to purchase.

The writer of an option on a futures contract is required to deposit initial and variation margin pursuant to requirements similar to those applicable to futures contracts. Premiums received from the writing of an option will be included in initial margin. The writing of an option on a futures contract involves risks similar to those relating to futures contracts. The CFTC subjects advisers to registered investment companies to regulation by the CFTC if a fund that is advised by the investment adviser either (i) invests, directly or indirectly, more than a prescribed level of its liquidation value in CFTC-regulated futures, options and swaps (“CFTC Derivatives”), or (ii) markets itself as providing investment exposure to such instruments. To the extent the Trust uses CFTC Derivatives, it intends to do so below such prescribed levels and will not market itself as a “commodity pool” or a vehicle for trading such instruments. Accordingly, the Advisor has claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act (“CEA”) pursuant to Rule 4.5 under the CEA. The Advisor is not, therefore, subject to registration or regulation as a “commodity pool operator” under the CEA in respect of the Trust.

Counterparty Credit Standards. To the extent that the Trust engages in principal transactions, including, but not limited to, OTC options, forward currency transactions, swap transactions, repurchase agreements and the purchase

and sale of bonds and other fixed-income securities, it must rely on the creditworthiness of its counterparties under such transactions. In certain instances, the credit risk of a counterparty is increased by the lack of a central clearing house for certain transactions, including certain swap contracts. In the event of the insolvency of a counterparty, the Trust may not be able to recover its assets, in full or at all, during the insolvency process. Counterparties to investments may have no obligation to make markets in such investments and may have the ability to apply essentially discretionary margin and credit requirements. Similarly, the Trust will be subject to the risk of bankruptcy of, or the inability or refusal to perform with respect to such investments by, the counterparties with which it deals. The Advisor will seek to minimize the Trust’s exposure to counterparty risk by entering into such transactions with counterparties the Advisor believes to be creditworthy at the time it enters into the transaction. Certain option transactions and Strategic Transactions may require the Trust to provide collateral to secure its performance obligations under a contract, which would also entail counterparty credit risk.

Securities Lending

The Trust may lend portfolio securities to certain borrowers determined to be creditworthy by the Advisor, including to borrowers affiliated with the Advisor. The borrowers provide collateral that is maintained in an amount at least equal to the current market value of the securities loaned. No securities loan will be made on behalf of the Trust if, as a result, the aggregate value of all securities loans of the Trust exceeds one-third of the value of the Trust’s total assets (including the value of the collateral received). The Trust may terminate a loan at any time and obtain the return of the securities loaned. The Trust receives the value of any interest or cash or non-cash distributions paid on the loaned securities.

With respect to loans that are collateralized by cash, the borrower may be entitled to receive a fee based on the amount of cash collateral. The Trust is compensated by the difference between the amount earned on the reinvestment of cash collateral and the fee paid to the borrower. In the case of collateral other than cash, the Trust is compensated by a fee paid by the borrower equal to a percentage of the market value of the loaned securities. Any cash collateral received by the Trust for such loans, and uninvested cash, may be invested, among other things, in a private investment company managed by an affiliate of the Advisor or in registered money market funds advised by the Advisor or their affiliates; such investments are subject to investment risk.

The Trust conducts its securities lending pursuant to an exemptive order from the SEC permitting it to lend portfolio securities to borrowers affiliated with the Trust and to retain an affiliate of the Trust as lending agent. To the extent that the Trust engages in securities lending, BlackRock Investment Management, LLC (“BIM”), an affiliate of the Advisor, acts as securities lending agent for the Trust, subject to the overall supervision of the Advisor. BIM administers the lending program in accordance with guidelines approved by the Board.

To the extent that the Trust engages in securities lending, the Trust retains a portion of securities lending income and remits a remaining portion to BIM as compensation for its services as securities lending agent. Securities lending income is equal to the total of income earned from the reinvestment of cash collateral (and excludes collateral investment expenses as defined below), and any fees or other payments to and from borrowers of securities. As securities lending agent, BIM bears all operational costs directly related to securities lending. The Trust is responsible for expenses in connection with the investment of cash collateral received for securities on loan (the “collateral investment expenses”). The cash collateral is invested in a private investment company managed by the Advisor or its affiliates. However, BIM has agreed to cap the collateral investment expenses of the private investment company to an annual rate of 0.04%. In addition, in accordance with the exemptive order, the investment adviser to the private investment company will not charge any advisory fees with respect to shares purchased by the Trust. Such shares also will not be subject to a sales load, distribution fee or service fee. If the private investment company’s weekly liquid assets fall below 30% of its total assets, BIM, as managing member of the private investment company, is permitted at any time, if it determines it to be in the best interests of the private investment company, to impose a liquidity fee of up to 2% of the value of units withdrawn or impose a redemption gate that temporarily suspends the right of withdrawal out of the private investment company. In addition, if the private investment company’s weekly liquid assets fall below 10% of its total assets at the end of any business day, the private investment company will impose a liquidity fee in the default amount of 1% of the amount withdrawn, generally effective as of the next business day, unless BIM determines that a higher (not to exceed 2%) or lower fee level or not imposing a liquidity fee is in the best interests of the private investment company. The shares of the private investment company purchased by the Trust would be subject to any such liquidity fee or redemption gate imposed.

Under the securities lending program, the Trust is categorized into a specific asset class. The determination of the Trust’s asset class category (fixed income, domestic equity, international equity, or fund of funds), each of which may be subject to a different fee arrangement, is based on a methodology agreed to between the Trust and BIM.

Pursuant to the current securities lending agreement: (i) if the Trust were to engage in securities lending, the Trust retains 82% of securities lending income (which excludes collateral investment expenses), and (ii) this amount can never be less than 70% of the sum of securities lending income plus collateral investment expenses.

In addition, commencing the business day following the date that the aggregate securities lending income earned across the BlackRock Fixed-Income Complex in a calendar year exceeds a specified threshold, the Trust, pursuant to the current securities lending agreement, will receive for the remainder of that calendar year securities lending income as follows: (i) if the Trust were to engage in securities lending, 85% of securities lending income (which excludes collateral investment expenses); and (ii) this amount can never be less than 70% of the sum of securities lending income plus collateral investment expenses.

Other Investment Policies

The Trust has adopted certain other policies as set forth below.

Temporary Investments

The Trust may invest in short-term tax-exempt and taxable securities subject to the limitations set forth above. The tax-exempt money market securities may include municipal notes, municipal commercial paper, municipal securities with a remaining maturity of less than one year, variable rate demand notes and participations therein. Municipal notes include tax anticipation notes, bond anticipation notes, revenue anticipation notes and grant anticipation notes. Anticipation notes are sold as interim financing in anticipation of tax collection, bond sales, government grants or revenue receipts. Municipal commercial paper refers to short-term unsecured promissory notes generally issued to finance short-term credit needs. The taxable money market securities in which the Trust may invest as Temporary Investments consist of U.S. Government securities, U.S. Government agency securities, domestic bank or savings institution certificates of deposit and bankers’ acceptances, short-term corporate debt securities such as commercial paper and repurchase agreements. These Temporary Investments must have a stated maturity not in excess of one year from the date of purchase. The Trust may not invest in any security issued by a commercial bank or a savings institution unless the bank or institution is organized and operating in the United States, has total assets of at least one billion dollars and is a member of the Federal Deposit Insurance Corporation (“FDIC”), except that up to 10% of total assets may be invested in certificates of deposit of smaller institutions if such certificates are fully insured by the FDIC.

Short-term taxable fixed-income investments include, without limitation, the following:

(1) U.S. Government securities, including bills, notes and bonds differing as to maturity and rates of interest that are either issued or guaranteed by the U.S. Treasury or by U.S. Government agencies or instrumentalities. U.S. Government securities include securities issued by (a) the Federal Housing Administration, Farmers Home Administration, Export-Import Bank of the United States, Small Business Administration, and the Government National Mortgage Association, whose securities are supported by the full faith and credit of the United States; (b) the Federal Home Loan Banks, Federal Intermediate Credit Banks, and the Tennessee Valley Authority, whose securities are supported by the right of the agency to borrow from the U.S. Treasury; (c) the Federal National Mortgage Association, whose securities are supported by the discretionary authority of the U.S. Government to purchase certain obligations of the agency or instrumentality; and (d) the Student Loan Marketing Association, whose securities are supported only by its credit. While the U.S. Government provides financial support to such U.S. Government-sponsored agencies or instrumentalities, no assurance can be given that it always will do so since it is not so obligated by law. The U.S. Government, its agencies and instrumentalities do not guarantee the market value of their securities. Consequently, the value of such securities may fluctuate.

(2) Certificates of deposit issued against funds deposited in a bank or a savings and loan association. Such certificates are for a definite period of time, earn a specified rate of return, and are normally negotiable. The issuer of a certificate of deposit agrees to pay the amount deposited plus interest to the bearer of the certificate on the date specified thereon. Certificates of deposit purchased by the Trust may not be fully insured by the FDIC.

(3) Repurchase agreements, which involve purchases of debt securities. At the time the Trust purchases securities pursuant to a repurchase agreement, it simultaneously agrees to resell and redeliver such securities to the seller, who also simultaneously agrees to buy back the securities at a fixed price and time. This assures a predetermined yield for the Trust during its holding period, since the resale price is always greater than the purchase price and reflects an agreed-upon market rate. Such actions afford an opportunity for the Trust to invest temporarily available cash. The Trust may enter into repurchase agreements only with respect to obligations of the U.S. Government, its agencies or instrumentalities; certificates of deposit; or bankers’ acceptances in which the Trust may invest. Repurchase agreements may be considered loans to the seller, collateralized by the underlying securities. The risk to the Trust is limited to the ability of the seller to pay the agreed-upon sum on the repurchase date; in the event of default, the repurchase agreement provides that the Trust is entitled to sell the underlying collateral. If the value of the collateral declines after the agreement is entered into, and if the seller defaults under a repurchase agreement when the value of the underlying collateral is less than the repurchase price, the Trust could incur a loss of both principal and interest. The Advisor monitors the value of the collateral at the time the action is entered into and at all times during the term of the repurchase agreement. The Advisor does so in an effort to determine that the value of the collateral always equals or exceeds the agreed-upon repurchase price to be paid to the Trust. If the seller were to be subject to a federal bankruptcy proceeding, the ability of the Trust to liquidate the collateral could be delayed or impaired because of certain provisions of the bankruptcy laws.

(4) Commercial paper, which consists of short-term unsecured promissory notes, including variable rate master demand notes issued by corporations to finance their current operations. Master demand notes are direct lending arrangements between the Trust and a corporation. There is no secondary market for such notes. However, they are redeemable by the Trust at any time. The Advisor will consider the financial condition of the corporation (e.g., earning power, cash flow and other liquidity ratios) and will continuously monitor the corporation’s ability to meet all of its financial obligations, because the Trust’s liquidity might be impaired if the corporation were unable to pay principal and interest on demand. Investments in commercial paper will be limited to commercial paper rated in the highest categories by a major rating agency and which mature within one year of the date of purchase or carry a variable or floating rate of interest.

If the Trust invests in short-term taxable fixed-income investments, a portion of your dividends would be subject to regular federal income tax.

Short-term tax-exempt fixed-income securities are securities that are exempt from regular federal income tax and mature within three years or less from the date of issuance. Short-term tax-exempt fixed-income securities include, without limitation, the following:

(1) Bond Anticipation Notes (“BANs”) are usually general obligations of state and local governmental issuers which are sold to obtain interim financing for projects that will eventually be funded through the sale of long-term debt obligations or bonds. The ability of an issuer to meet its obligations on its BANs is primarily dependent on the issuer’s access to the long-term municipal bond market and the likelihood that the proceeds of such bond sales will be used to pay the principal and interest on the BANs.

(2) Tax Anticipation Notes (“TANs”) are issued by state and local governments to finance the current operations of such governments. Repayment is generally to be derived from specific future tax revenues. TANs are usually general obligations of the issuer. A weakness in an issuer’s capacity to raise taxes due to, among other things, a decline in its tax base or a rise in delinquencies could adversely affect the issuer’s ability to meet its obligations on outstanding TANs.

(3) Revenue Anticipation Notes (“RANs”) are issued by governments or governmental bodies with the expectation that future revenues from a designated source will be used to repay the notes. In general, they also constitute general obligations of the issuer. A decline in the receipt of projected revenues, such as anticipated revenues from another level of government, could adversely affect an issuer’s ability to meet its obligations on outstanding RANs. In addition, the possibility that the revenues would, when received, be used to meet other obligations could affect the ability of the issuer to pay the principal and interest on RANs.

(4) Construction Loan Notes are issued to provide construction financing for specific projects. Frequently, these notes are redeemed with funds obtained from the Federal Housing Administration.

(5) Bank Notes are notes issued by local government bodies and agencies to commercial banks as evidence of borrowings. The purposes for which the notes are issued are varied but they are frequently issued to meet short-term working capital or capital-project needs. These notes may have risks similar to the risks associated with TANs and RANs.

(6) Tax-Exempt Commercial Paper (“municipal paper”) represents very short-term unsecured, negotiable promissory notes, issued by states, municipalities and their agencies. Payment of principal and interest on issues of municipal paper may be made from various sources, to the extent the funds are available therefrom. Maturities on municipal paper generally will be shorter than the maturities of TANs, BANs or RANs. There is a limited secondary market for issues of municipal paper.

Certain municipal bonds may carry variable or floating rates of interest whereby the rate of interest is not fixed but varies with changes in specified market rates or indices, such as a bank prime rate or tax-exempt money market indices.

While the various types of notes described above as a group represent the major portion of the tax-exempt note market, other types of notes are available in the marketplace and the Trust may invest in such other types of notes to the extent permitted under its investment objective, policies and limitations. Such notes may be issued for different purposes and may be secured differently from those mentioned above.

Interest Rate Swap Transactions

In order to seek to hedge the value of the Trust against interest rate fluctuations or to seek to increase the Trust’s return, the Trust may enter into interest rate swap transactions such as Municipal Market Data AAA Cash Curve swaps (“MMD Swaps”) or Securities Industry and Financial Markets Association Municipal Swap Index swaps (“SIFMA Swaps”). To the extent that the Trust enters into these transactions, the Trust expects to do so primarily to preserve a return or spread on a particular investment or portion of its portfolio as a duration management technique or to protect against any increase in the price of securities the Trust anticipates purchasing at a later date. The Trust may enter into these transactions primarily as a hedge or for duration or risk management rather than as a speculative investment. However, the Trust also may invest in MMD Swaps and SIFMA Swaps to seek to enhance return or gain or to increase the Trust’s yield, for example, during periods of steep interest rate yield curves (i.e., wide differences between short-term and long-term interest rates).

The Trust may purchase and sell SIFMA Swaps in the SIFMA swap market. In a SIFMA Swap, the Trust exchanges with another party their respective commitments to pay or receive interest (e.g., an exchange of fixed rate payments for floating rate payments linked to the SIFMA Municipal Swap Index). Because the underlying index is a tax-exempt index, SIFMA Swaps may reduce cross-market risks incurred by the Trust and increase the Trust’s ability to hedge effectively. SIFMA Swaps are typically quoted for the entire yield curve, beginning with a seven day floating rate index out to 30 years. The duration of a SIFMA Swap is approximately equal to the duration of a fixed-rate municipal security with the same attributes as the swap (e.g., coupon, maturity, call feature).

The Trust may also purchase and sell MMD Swaps, also known as MMD rate locks. An MMD Swap permits the Trust to lock in a specified municipal interest rate for a portion of its portfolio to preserve a return on a particular investment or a portion of its portfolio as a duration management technique or to protect against any increase in the price of securities to be purchased at a later date. By using an MMD Swap, the Trust can create a synthetic long or short position, allowing the Trust to select the most attractive part of the yield curve. An MMD Swap is a contract between the Trust and an MMD Swap provider pursuant to which the parties agree to make payments to each other on a notional amount, contingent upon whether the Municipal Market Data AAA General Obligation Scale is above or below a specified level on the expiration date of the contract. For example, if the Trust buys an MMD Swap and the Municipal Market Data AAA General Obligation Scale is below the specified level on the expiration date, the counterparty to the contract will make a payment to the Trust equal to the specified level minus the actual level, multiplied by the notional amount of the contract. If the Municipal Market Data AAA General Obligation Scale is above the specified level on the expiration date, the Trust will make a payment to the counterparty equal to the actual level minus the specified level, multiplied by the notional amount of the contract.

In connection with investments in SIFMA and MMD Swaps, there is a risk that municipal yields will move in the opposite direction than anticipated by the Trust, which would cause the Trust to make payments to its counterparty in the transaction that could adversely affect the Trust’s performance.

If there is a default by the other party to an uncleared interest rate swap transaction, generally the Trust will have contractual remedies pursuant to the agreements related to the transaction. With respect to interest rate swap transactions cleared through a central clearing counterparty, a clearing organization will be substituted for the counterparty and will guarantee the parties’ performance under the swap agreement. However, there can be no assurances that the clearing organization will satisfy its obligation to the Trust or that the Trust would be able to recover the full amount of assets deposited on its behalf with the clearing organization in the event of the default by the clearing organization or the Trust’s clearing broker. Certain U.S. federal income tax requirements may limit the Trust’s ability to engage in interest rate swaps. Distributions attributable to transactions in interest rate swaps generally will be taxable as ordinary income to shareholders.

Call Rights

The Trust may purchase a municipal security issuer’s right to call all or a portion of such municipal security for mandatory tender for purchase (a “Call Right”). A holder of a Call Right may exercise such right to require a mandatory tender for the purchase of related municipal securities, subject to certain conditions. A Call Right that is not exercised prior to maturity of the related municipal security will expire without value. The economic effect of holding both the Call Right and the related municipal security is identical to holding a municipal security as a non-callable security. Certain investments in such obligations may be illiquid.

Credit Default Swap Agreements

The Trust may enter into credit default swap agreements for hedging purposes or to seek to increase its return. The credit default swap agreement may have as reference obligations one or more securities that are not currently held by the Trust. The protection “buyer” in a credit default contract may be obligated to pay the protection “seller” an upfront or a periodic stream of payments over the term of the contract, provided that no credit event on a reference obligation has occurred. If a credit event occurs, the seller generally must pay the buyer the “par value” (full notional value) of the swap in exchange for an equal face amount of deliverable obligations of the reference entity described in the swap, or the seller may be required to deliver the related net cash amount (the difference between the market value of the reference obligation and its par value), if the swap is cash settled. The Trust may be either the buyer or seller in the transaction. If the Trust is a buyer and no credit event occurs, the Trust may recover nothing if the swap is held through its termination date. However, if a credit event occurs, the buyer generally may elect to receive the full notional value of the swap in exchange for an equal face amount of deliverable obligations of the reference entity whose value may have significantly decreased. As a seller, the Trust generally receives an upfront payment or a fixed rate of income throughout the term of the swap, which typically is between six (6) months and three years, provided that there is no credit event. If a credit event occurs, generally the seller must pay the buyer the full notional value of the swap in exchange for an equal face amount of deliverable obligations of the reference entity whose value may have significantly decreased. As the seller, the Trust would effectively add leverage to its portfolio because, in addition to its total net assets, the Trust would be subject to investment exposure on the notional amount of the swap.

Credit default swap agreements involve greater risks than if the Trust had invested in the reference obligation directly since, in addition to general market risks, credit default swaps are subject to illiquidity risk, counterparty risk and credit risks. The Trust will enter into credit default swap agreements only with counterparties the Advisor believes to be creditworthy at the time they enter into such transactions. A buyer generally also will lose its investment and recover nothing should no credit event occur and the swap is held to its termination date. If a credit event were to occur, the value of any deliverable obligation received by the seller, coupled with the upfront or periodic payments previously received, may be less than the full notional value it pays to the buyer, resulting in a loss of value to the seller.

VRDOs and Participating VRDOs

VRDOs are tax-exempt obligations that contain a floating or variable interest rate adjustment formula and right of demand on the part of the holder thereof to receive payment of the unpaid principal balance plus accrued interest upon a short notice period not to exceed seven (7) days. There is, however, the possibility that because of default or

insolvency the demand feature of VRDOs and Participating VRDOs may not be honored. The interest rates are adjustable at intervals (ranging from daily to up to one year) to some prevailing market rate for similar investments, such adjustment formula being calculated to maintain the market value of the VRDOs, at approximately the par value of the VRDOs on the adjustment date. The adjustments typically are based upon the SIFMA Municipal Swap Index or some other appropriate interest rate adjustment index. The Trust may invest in all types of tax-exempt instruments currently outstanding or to be issued in the future which satisfy its short-term maturity and quality standards.

Participating VRDOs provide the Trust with a specified undivided interest (up to 100%) of the underlying obligation and the right to demand payment of the unpaid principal balance plus accrued interest on the Participating VRDOs from the financial institution upon a specified number of days’ notice, not to exceed seven (7) days. In addition, the Participating VRDO is backed by an irrevocable letter of credit or guaranty of the financial institution. The Trust would have an undivided interest in the underlying obligation and thus participate on the same basis as the financial institution in such obligation except that the financial institution typically retains fees out of the interest paid on the obligation for servicing the obligation, providing the letter of credit and issuing the repurchase commitment. The Trust has been advised by its counsel that the Trust should be entitled to treat the income received on Participating VRDOs as interest from tax-exempt obligations as long as the Trust does not invest more than 20% of its total assets in such investments and certain other conditions are met. It is contemplated that the Trust will not invest more than 20% of its assets in Participating VRDOs.

The Temporary Investments, VRDOs and Participating VRDOs in which the Trust may invest will be in the following rating categories at the time of purchase: MIG-1/VMIG-1 through MIG-3/VMIG-3 for notes and VRDOs and Prime-1 through Prime-3 for commercial paper (as determined by Moody’s), SP-1 through SP-2 for notes and A-1 through A-3 for VRDOs and commercial paper (as determined by S&P), or F1 through F3 for notes, VRDOs and commercial paper (as determined by Fitch). Temporary Investments, if not rated, must be of comparable quality in the opinion of the Advisor. In addition, the Trust reserves the right to invest temporarily a greater portion of its assets in Temporary Investments for defensive purposes, when, in the judgment of the Advisor, market conditions warrant.

Repurchase Agreements

The Trust may invest in securities pursuant to repurchase agreements. Repurchase agreements may be entered into only with a member bank of the Federal Reserve System or a primary dealer or an affiliate thereof, in U.S. Government securities. A repurchase agreement is a contractual agreement whereby the seller of securities agrees to repurchase the same security at a specified price on a future date agreed upon by the parties. The agreed-upon repurchase price determines the yield during the Trust’s holding period. Repurchase agreements are considered to be loans collateralized by the underlying security that is the subject of the repurchase contract. The risk to the Trust is limited to the ability of the issuer to pay the agreed-upon repurchase price on the delivery date; however, although the value of the underlying collateral at the time the transaction is entered into always equals or exceeds the agreed-upon repurchase price, if the value of the collateral declines there is a risk of loss of both principal and interest. In the event of default, the collateral may be sold but the Trust might incur a loss if the value of the collateral declines, and might incur disposition costs or experience delays in connection with liquidating the collateral. In addition, if bankruptcy proceedings are commenced with respect to the seller of the security, realization upon the collateral by the Trust may be delayed or limited. The Advisor will monitor the value of the collateral at the time the transaction is entered into and throughout the term of the repurchase agreement in an effort to determine that such value always equals or exceeds the agreed-upon repurchase price. In the event the value of the collateral declines below the repurchase price, the Advisor will demand additional collateral from the issuer to increase the value of the collateral to at least that of the repurchase price, including interest.

In general, for federal income tax purposes, repurchase agreements are treated as collateralized loans secured by the securities “sold.” Therefore, amounts earned under such agreements will not be considered tax-exempt interest. The treatment of purchase and sales contracts is less certain.

LEVERAGE

The Trust uses leverage to seek to achieve its investment objectives. The Trust’s use of leverage may increase or decrease from time to time in its discretion and the Trust may, in the future, determine not to use leverage. The Trust currently leverages its assets through the use of Preferred Shares and by investing in TOB Residuals. For the fiscal year ended December 31, 2025, the average liquidation value of the VRDP Shares outstanding was $50,000,000 and the annualized dividend rate on the VRDP Shares was 3.85%. The Trust currently does not intend to borrow money or issue debt securities. The Trust is permitted to borrow money (including by investing in TOB Residuals) or issue debt securities in an amount up to 33 1/3% of its managed assets (50% of its net assets), issue preferred shares in an amount up to 50% of its managed assets (100% of its net assets) and enter into derivative instruments with leverage embedded in them in a limited manner or subject to a limit on leverage risk calculated based on value-at-risk, as required by Rule 18f-4 under the Investment Company Act. Although it has no present intention to do so, the Trust reserves the right to borrow money from banks or other financial institutions, or issue debt securities, in the future if it believes that market conditions would be conducive to the successful implementation of a leveraging strategy through borrowing money or issuing debt securities. Any such leveraging will not be fully achieved until the proceeds resulting from the use of leverage have been invested in accordance with the Trust’s investment objectives and policies.

The use of leverage can create risks. The NAV and market price of the common shares and the yield to holders of common shares will be more volatile than if leverage were not used. Changes in the value of the Trust’s portfolio, including securities bought with the proceeds of leverage, will be borne entirely by the holders of common shares. If there is a net decrease or increase in the value of the Trust’s investment portfolio, leverage will decrease or increase, as the case may be, the NAV per common share to a greater extent than if the Trust did not utilize leverage. A reduction in the Trust’s NAV may cause a reduction in the market price of its shares. During periods in which the Trust is using leverage, the fee paid to the Advisor for advisory services will be higher than if the Trust did not use leverage, because the fees paid will be calculated on the basis of the Trust’s Managed Assets, which includes the proceeds from leverage. Any leveraging strategy the Trust employs may not be successful.

Certain types of leverage the Trust currently expects to use may result in the Trust being subject to covenants relating to asset coverage and portfolio composition requirements. The Trust may be subject to certain restrictions on investments imposed by one or more lenders or by guidelines of one or more rating agencies, which may issue ratings for any short-term debt securities or preferred shares issued by the Trust. The terms of any borrowings or rating agency guidelines may impose asset coverage or portfolio composition requirements that are more stringent than those imposed by the Investment Company Act. The Advisor does not believe that these covenants or guidelines will impede it from managing the Trust’s portfolio in accordance with its investment objectives and policies if the Trust were to utilize leverage.

Under the Investment Company Act, the Trust is not permitted to issue senior securities if, immediately after the issuance of such senior securities, the Trust would have an asset coverage ratio (as defined in the Investment Company Act) of less than 300% with respect to senior securities representing indebtedness (i.e., for every dollar of indebtedness outstanding, the Trust is required to have at least three dollars of assets) or less than 200% with respect to senior securities representing preferred stock (i.e., for every dollar of preferred stock outstanding, the Trust is required to have at least two dollars of assets). The Investment Company Act also provides that the Trust may not declare distributions or purchase its stock (including through tender offers) if, immediately after doing so, it will have an asset coverage ratio of less than 300% or 200%, as applicable. Under the Investment Company Act, certain short-term borrowings (such as for cash management purposes) are not subject to these limitations if (i) repaid within 60 days, (ii) not extended or renewed and (iii) not in excess of 5% of the total assets of the Trust.

Effects of Leverage

Assuming that leverage will represent approximately [●]% of the Trust’s Managed Assets and that the Trust will bear expenses relating to that leverage at an average annual rate of [●]%, the income generated by the Trust’s portfolio (net of estimated expenses) must exceed [●]% in order to cover the expenses specifically related to the Trust’s use of leverage. Of course, these numbers are merely estimates used for illustration. Actual leverage expenses will vary frequently and may be significantly higher or lower than the rate estimated above.

The following table is furnished in response to requirements of the SEC. It is designed to illustrate the effect of leverage on total returns from an investment in the common shares assuming investment portfolio total returns (comprised of income and changes in the value of securities held in the Trust’s portfolio) of (10)%, (5)%, 0%, 5% and 10%. These assumed investment portfolio returns are hypothetical figures and are not necessarily indicative of the investment portfolio returns expected to be experienced by the Trust. See “Risks.” The table further reflects the use of leverage representing [●]% of the Trust’s Managed Assets and the Trust’s currently projected annual leverage expense of [●]%.


Assumed Portfolio Total Return (Net of Expenses)	(10.00	)%	(5.00	)%	0.00	%	5.00	%	10.00	%
Corresponding Total Return to Holders of Common Shares	([●]	)%	([●]	)%	([●]	)%	[●]	%	[●]	%

The corresponding total return to holders of common shares is composed of two elements: the common share dividends paid by the Trust (the amount of which is largely determined by the net investment income of the Trust) and gains or losses on the value of the securities the Trust owns. As required by SEC rules, the table assumes that the Trust is more likely to suffer capital losses than to enjoy capital appreciation. For example, to assume a total return of 0% the Trust must assume that the interest it receives on its investments is entirely offset by losses in the value of those securities.

Tender Option Bond Transactions

The Trust currently leverages its assets through the use of TOB Residuals, which are derivative interests in municipal bonds. The TOB Residuals in which the Trust will invest pay interest or income that, in the opinion of counsel to the issuer of such TOB Residuals, is exempt from regular U.S. federal income tax. No independent investigation will be made to confirm the tax-exempt status of the interest or income paid by TOB Residuals held by the Trust. Although volatile, TOB Residuals typically offer the potential for yields exceeding the yields available on fixed rate municipal bonds with comparable credit quality.

TOB Residuals represent beneficial interests in a special purpose Trust formed for the purpose of holding municipal bonds contributed by one or more funds (a “TOB Trust”). A TOB Trust typically issues two classes of beneficial interests: short-term floating rate interests (“TOB Floaters”), which are sold to third-party investors, and TOB Residuals, which are generally issued to the fund(s) that transferred municipal bonds to the TOB Trust. The Trust may invest in both TOB Floaters and TOB Residuals. TOB Floaters may have first priority on the cash flow from the municipal bonds held by the TOB Trust and are enhanced with a liquidity support arrangement from a third-party TOBs Liquidity Provider (defined below) which allows holders to tender their position at par (plus accrued interest). The Trust, as a holder of TOB Residuals, is paid the residual cash flow from the TOB Trust after payment of TOB Trust expenses and interest on the TOB Floaters. The Trust contributes municipal bonds to the TOB Trust and is paid the cash received by the TOB Trust from the sale of the TOB Floaters, less certain transaction costs, and typically will invest the cash to purchase additional municipal bonds or other investments permitted by its investment policies. If the Trust ever purchases all or a portion of the TOB Floaters sold by the TOB Trust, it may surrender those TOB Floaters together with a proportionate amount of TOB Residuals to the TOB Trust in exchange for a proportionate amount of the municipal bonds owned by the TOB Trust.

Other registered investment companies advised by the Investment Advisor or its affiliates (the “BlackRock-advised Funds”) may contribute municipal bonds to a TOB Trust into which the Trust has contributed municipal bonds. If multiple BlackRock-advised Funds participate in the same TOB Trust, the economic rights and obligations under the TOB Residual will generally be shared among the funds ratably in proportion to their participation in the TOB Trust.

The municipal bonds transferred to a TOB Trust typically are high grade municipal bonds. In certain cases, when municipal bonds transferred are lower grade municipal bonds, the TOB Trust transaction includes a credit enhancement feature that provides for the timely payment of principal and interest on the bonds to the TOB Trust by a credit enhancement provider. The TOB Trust would be responsible for the payment of the credit enhancement fee and the Trust, as a TOB Residual holder, would be responsible for reimbursement of any payments of principal and interest made by the credit enhancement provider.

The TOB Residuals held by the Trust generally provide the Trust with the right to cause the holders of a proportional share of the TOB Floaters to tender their notes to the TOB Trust at par plus accrued interest. Thereafter, the Trust may withdraw a corresponding share of the municipal bonds from the TOB Trust. As a result, a tender option bond

transaction, in effect, creates exposure for the Trust to the entire return of the municipal bonds in the TOB Trust, with a net cash investment by the Trust that is less than the value of the municipal bonds in the TOB Trust. This multiplies the positive or negative impact of the municipal bonds’ return within the Trust (thereby creating leverage). The leverage within a TOB Trust depends on the value of the municipal bonds deposited in the TOB Trust relative to the value of the TOB Floaters it issues.

The Trust may invest in highly leveraged TOB Residuals. A TOB Residual generally is considered highly leveraged if the principal amount of the TOB Floaters issued by the related TOB Trust exceeds 75% of the principal amount of the municipal bonds owned by the TOB Trust.

The leverage attributable to the Trust’s use of TOB Residuals may be “called away” on relatively short notice and therefore may be less permanent than more traditional forms of leverage. The TOB Trust may be collapsed without the consent of the Trust upon the occurrence of termination events, as defined in the TOB Trust agreements, including if TOB Floaters that are tendered to the TOBs Liquidity Provider cannot be remarketed. Attempts to remarket tendered securities often failed during volatile market conditions in the past. Upon the occurrence of a termination event, a TOB Trust would be liquidated with the proceeds applied first to any accrued fees owed to the trustee of the TOB Trust, the remarketing agent of the TOB Floaters and the TOBs Liquidity Provider. Upon certain termination events, the holders of the TOB Floaters would be paid before the TOB Residual holders (i.e., the Trust) whereas in other termination events, the TOB Floater and TOB Residual holders would be paid pro rata. If the proceeds upon liquidation of a TOB Trust, net of payment of fees, are less than the aggregate amount the TOB Residual and TOB Floater holders invested in the TOB Trust, the Trust as a TOB Residual holder will realize a loss on its investment, particularly if the TOB Floater holders are paid before the TOB Residual holders. The risk of such a loss may be greater during volatile market conditions when it may be difficult to sell the bonds held by a TOB Trust.

TOB Trusts are typically supported by a liquidity facility provided by a TOBs Liquidity Provider that allows the holders of the TOB Floaters to tender their TOB Floaters in exchange for payment of par plus accrued interest on any business day (subject to the non-occurrence of a termination event). The tendered TOB Floaters are remarketed by a remarketing agent. In the event of a failed remarketing, the TOB Trust may draw upon a loan from the TOBs Liquidity Provider to purchase the tendered TOB Floaters. Any loans made by the TOBs Liquidity Provider will be secured by the purchased TOB Floaters held by the TOB Trust and will be subject to an increased interest rate based on number of days the loan is outstanding.

The Trust may invest in a TOB Trust on either a non-recourse or recourse basis. When the Trust invests in TOB Trusts on a non-recourse basis, and the TOBs Liquidity Provider is required to make a payment under the liquidity facility, the TOBs Liquidity Provider will typically liquidate all or a portion of the municipal bonds held in the TOB Trust and then fund the balance, if any, of the Liquidation Shortfall. If the Trust invests in a TOB Trust on a recourse basis, it will typically enter into a reimbursement agreement with the TOBs Liquidity Provider pursuant to which the Trust is required to reimburse the TOBs Liquidity Provider the amount of any Liquidation Shortfall. As a result, if the Trust invests in a recourse TOB Trust, the Trust will bear the risk of loss with respect to any Liquidation Shortfall. If multiple BlackRock-advised Funds participate in any such TOB Trust, these losses will be shared ratably, in proportion to their participation in the TOB Trust.

Under accounting rules, municipal bonds of the Trust that are deposited into a TOB Trust are investments of the Trust and are presented on the Trust’s Schedule of Investments and outstanding TOB Floaters issued by a TOB Trust are presented as liabilities in the Trust’s Statement of Assets and Liabilities. Interest income from the underlying municipal bonds is recorded by the Trust on an accrual basis. Interest expense incurred on the TOB Floaters and other expenses related to remarketing, administration, trustee and other services to a TOB Trust are reported as expenses of the Trust. In addition, under accounting rules, loans made to a TOB Trust sponsored by the Trust may be presented as loans of the Trust in the Trust’s financial statements even if there is no recourse to the Trust’s assets.

For TOB Floaters, generally, the interest rate earned will be based upon the market rates for municipal bonds with maturities or remarketing provisions that are comparable in duration to the periodic interval of the tender option. Since the tender option feature has a shorter term than the final maturity or first call date of the underlying municipal bonds deposited in the TOB Trust, the holder of the TOB Floaters relies upon the terms of the agreement with the financial institution furnishing the liquidity facility as well as the credit strength of that institution. The perceived reliability and creditworthiness, of many major financial institutions, some of which sponsor and/or provide liquidity support to TOB

Trusts increases the risk associated with TOB Floaters. This in turn may reduce the desirability of TOB Floaters as investments, which could impair the viability or availability of TOB Trusts.

Rule 18f-4 under the Investment Company Act permits the Trust to enter into TOB Trust transactions, reverse repurchase agreements and similar financing transactions (e.g., borrowed bonds) notwithstanding the limitation on the issuance of senior securities in Section 18 of the Investment Company Act, provided that the Trust either (i) complies with the 300% asset coverage ratio applicable to senior securities representing indebtedness with respect to such transactions and any other borrowings in the aggregate, or (ii) treats all such transactions as derivatives transactions under Rule 18f-4. Future regulatory requirements or SEC guidance may necessitate more onerous contractual or regulatory requirements, which may increase the costs or reduce the degree of potential economic benefits of TOB Trust transactions or limit the Trust’s ability to enter into or manage TOB Trust transactions.

Preferred Shares

The Trust has leveraged its portfolio by issuing VRDP Shares. Under the Investment Company Act, the Trust is not permitted to issue preferred shares if, immediately after such issuance, the liquidation value of the Trust’s outstanding preferred shares exceeds 50% of its assets (including the proceeds from the issuance) less liabilities other than borrowings (i.e., the value of the Trust’s assets must be at least 200% of the liquidation value of its outstanding preferred shares). In addition, the Trust would not be permitted to declare any cash dividend or other distribution on its common shares unless, at the time of such declaration, the value of the Trust’s assets less liabilities other than borrowings is at least 200% of such liquidation value.

[For tax purposes, the Trust is currently required to allocate tax-exempt interest income, net capital gain and other taxable income, if any, between its common shares and preferred shares outstanding in proportion to total dividends paid to each class for the year in which or with respect to which tax-exempt income, the net capital gain or other taxable income is paid. If net capital gain or other taxable income is allocated to preferred shares, instead of solely tax-exempt income, the Trust will likely have to pay higher total dividends to preferred shareholders or make special payments to preferred shareholders to compensate them for the increased tax liability. This would reduce the total amount of dividends paid to the common shareholders but would increase the portion of the dividend that is tax-exempt. If the increase in dividend payments or the special payments to preferred shareholders are not entirely offset by a reduction in the tax liability of, and an increase in the tax-exempt dividends received by, the common shareholders, the advantage of the Trust’s leveraged structure to common shareholders will be reduced.]

Credit Facility

The Trust is permitted to leverage its portfolio by entering into one or more credit facilities. If the Trust enters into a credit facility, the Trust may be required to prepay outstanding amounts or incur a penalty rate of interest upon the occurrence of certain events of default. The Trust would also likely have to indemnify the lenders under the credit facility against liabilities they may incur in connection therewith. In addition, the Trust expects that any credit facility would contain covenants that, among other things, likely would limit the Trust’s ability to pay distributions in certain circumstances, incur additional debt, change certain of its investment policies and engage in certain transactions, including mergers and consolidations, and require asset coverage ratios in addition to those required by the Investment Company Act. The Trust may be required to pledge its assets and to maintain a portion of its assets in cash or high-grade securities as a reserve against interest or principal payments and expenses. The Trust expects that any credit facility would have customary covenant, negative covenant and default provisions. There can be no assurance that the Trust will enter into an agreement for a credit facility, or one on terms and conditions representative of the foregoing, or that additional material terms will not apply. In addition, if entered into, a credit facility may in the future be replaced or refinanced by one or more credit facilities having substantially different terms or by the issuance of preferred shares.

Derivatives

The Trust may enter into derivative transactions that have leverage embedded in them. Derivative transactions that the Trust may enter into and the risks associated with them are described elsewhere in this prospectus and are also referred to as “Strategic Transactions.” The Trust cannot assure you that investments in derivative transactions that have leverage embedded in them will result in a higher return on its common shares. Under Rule 18f-4 under the

RISKS

The NAV and market price of, and dividends paid on, the common shares will fluctuate with and be affected by, among other things, the risks more fully described below.

General Risks

Please refer to the section of the Trust’s most recent annual report on Form N-CSR entitled “ Investment Objectives, Policies and Risks—Risk Factors”, which is incorporated by reference herein, for a discussion of the general risks of investing in the Trust.

Other Risks

Unrated Securities Risk

The Trust may purchase securities that are not rated by any rating organization. The Advisor may, after assessing such securities’ credit quality, internally assign ratings to certain of those securities in categories similar to those of rating organizations. Some unrated securities may not have an active trading market or may be difficult to value, which means the Trust might have difficulty selling them promptly at an acceptable price. To the extent that the Trust invests in unrated securities, the Trust’s ability to achieve its investment objectives will be more dependent on the Advisor’s credit analysis than would be the case when the Trust invests in rated securities.

Zero-Coupon Securities Risk

Zero-coupon securities are securities that are sold at a discount to par value and do not pay interest during the life of the security. The discount approximates the total amount of interest the security will accrue and compound over the period until maturity at a rate of interest reflecting the market rate of the security at the time of issuance. Upon maturity, the holder of a zero-coupon security is entitled to receive the par value of the security.

The Trust accrues income with respect to these securities for U.S. federal income tax and accounting purposes prior to the receipt of cash payments. Zero-coupon securities may be subject to greater fluctuation in value and less liquidity in the event of adverse market conditions than comparably rated securities that pay cash interest at regular intervals.

In addition to the above-described risks, there are certain other risks related to investing in zero-coupon securities. During a period of severe market conditions, the market for such securities may become even less liquid. In addition, as these securities do not pay cash interest, the Trust’s investment exposure to these securities and their risks, including credit risk, will increase during the time these securities are held in the Trust’s portfolio.

Variable Rate Demand Obligations Risk

VRDOs are floating rate securities that combine an interest in a long-term municipal bond with a right to demand payment before maturity from a bank or other financial institution. If the bank or financial institution is unable to pay, the Trust may lose money.

Private Activity Bonds

The Trust may invest without limit in certain tax-exempt securities classified as “private activity bonds.” These bonds may subject certain investors in the Trust to the federal alternative minimum tax.

Preferred Securities Risk

There are special risks associated with investing in preferred securities, including:

Deferral Risk. Preferred securities may include provisions that permit the issuer, at its discretion, to defer distributions for a stated period without any adverse consequences to the issuer. If the Trust owns a preferred security that is deferring its distributions, the Trust may be required to report income for tax purposes although it has not yet received such income.

Subordination Risk. Preferred securities are subordinated to bonds and other debt instruments in a company’s capital structure in terms of having priority to corporate income and liquidation payments, and therefore will be subject to greater credit risk than debt instruments.

Limited Voting Rights Risk. Generally, preferred security holders (such as the Trust) have no voting rights with respect to the issuing company unless preferred dividends have been in arrears for a specified number of periods, at which time the preferred security holders may elect a number of directors to the issuer’s board. Generally, once all the arrearages have been paid, the preferred security holders no longer have voting rights. In the case of trust preferred securities, holders generally have no voting rights, except if (i) the issuer fails to pay dividends for a specified period of time or (ii) a declaration of default occurs and is continuing.

Special Redemption Rights Risk. In certain varying circumstances, an issuer of preferred securities may redeem the securities prior to a specified date. For instance, for certain types of preferred securities, a redemption may be triggered by certain changes in U.S. federal income tax or securities laws. As with call provisions, a special redemption by the issuer may negatively impact the return of the security held by the Trust.

New Types of Securities Risk. From time to time, preferred securities, including trust preferred securities, have been, and may in the future be, offered having features other than those described herein. The Trust reserves the right to invest in these securities if the Advisor believes that doing so would be consistent with the Trust’s investment objectives and policies. Since the market for these instruments would be new, the Trust may have difficulty disposing of them at a suitable price and time. In addition to limited liquidity, these instruments may present other risks, such as high price volatility.

U.S. Government Securities Risk

U.S. Government debt securities generally involve lower levels of credit risk than other types of fixed-income securities of similar maturities, although, as a result, the yields available from U.S. Government debt securities are generally lower than the yields available from such other securities. Like other fixed-income securities, the values of U.S. Government securities change as interest rates fluctuate.

Reference Rate Replacement Risk

The London Interbank Offered Rate (“LIBOR”) had historically been used extensively in the U.S. and globally as a “benchmark” or “reference rate” for various commercial and financial contracts, including corporate and municipal bonds, bank loans, asset-backed and mortgage-related securities, interest rate swaps and other derivatives. Instruments in which the Trust invests may have historically paid interest at floating rates based on LIBOR or may have been subject to interest caps or floors based on LIBOR. The Trust and issuers of instruments in which the Trust invests may have also historically obtained financing at floating rates based on LIBOR. In connection with the global transition away from LIBOR led by regulators and market participants as a result of benchmark reforms, LIBOR was last published on a representative basis at the end of June 2023. Alternative reference rates to LIBOR have been established in most major currencies and markets in these alternative rates are continuing to develop (e.g., the Secured Overnight Financing Rate (“SOFR”) for USD-LIBOR). While the transition from LIBOR has gone relatively smoothly, residual risks associated with the transition may remain that may impact markets or particular investments and, as such, the full impact of the transition on the Trust or the financial instruments in which the Trust invests cannot yet be fully determined.

SOFR is intended to be a broad measure of the cost of borrowing funds overnight in transactions that are collateralized by U.S. Treasury securities. SOFR is calculated based on transaction-level repo data collected from various sources.

For each trading day, SOFR is calculated as a volume-weighted median rate derived from such data. Because SOFR is a financing rate based on overnight secured funding transactions, it differs fundamentally from LIBOR. LIBOR is intended to be an unsecured rate that represents interbank funding costs for different short-term maturities or tenors. It is a forward-looking rate reflecting expectations regarding interest rates for the applicable tenor. Thus, LIBOR is intended to be sensitive, in certain respects, to bank credit risk and to term interest rate risk. In contrast, SOFR is a secured overnight rate reflecting the credit of U.S. Treasury securities as collateral. Thus, it is largely insensitive to credit-risk considerations and to short-term interest rate risks. SOFR is a transaction-based rate, and it has been more volatile than other benchmark or market rates, such as three-month LIBOR, during certain periods. For these reasons, among others, there is no assurance that SOFR, or rates derived from SOFR, will perform in the same or similar way as LIBOR would have performed at any time, and there is no assurance that SOFR-based rates will be a suitable substitute for LIBOR. SOFR has a relatively limited history, having been first published in April 2018. The future performance of SOFR, and SOFR-based reference rates, cannot be predicted based on SOFR’s history or otherwise. Levels of SOFR in the future may bear little or no relation to historical levels of SOFR, LIBOR or other rates. There can also be no assurance that SOFR will not be discontinued or fundamentally altered in a manner that is materially adverse to the interests of the Trust.

In addition, interest rates or other types of rates and indices which are classified as “benchmarks” have been the subject of ongoing national and international regulatory reform, including under the European Union (“EU”) regulation on indices used as benchmarks in financial instruments and financial contracts (known as the “Benchmarks Regulation”). The Benchmarks Regulation has been enacted into United Kingdom (“UK”) law by virtue of the EU (Withdrawal) Act 2018 (as amended), subject to amendments made by the Benchmarks (Amendment and Transitional Provision) (EU Exit) Regulations 2019 (SI 2019/657) and other statutory instruments. Following the implementation of these reforms, the manner of administration of benchmarks has changed and may further change in the future, with the result that relevant benchmarks may perform differently than in the past, the use of benchmarks that are not compliant with the new standards by certain supervised entities may be restricted, and certain benchmarks may be eliminated entirely. Such changes could cause increased market volatility and disruptions in liquidity for instruments that rely on or are impacted by such benchmarks. Additionally, there could be other consequences which cannot be predicted.

Strategic Transactions and Derivatives Risk

The Trust may engage in various Strategic Transactions for duration management and other investment and risk management purposes, including to attempt to protect against possible changes in the market value of the Trust’s portfolio resulting from trends in the securities markets and changes in interest rates or to protect the Trust’s unrealized gains in the value of its portfolio securities, to facilitate the sale of portfolio securities for investment purposes or to establish a position in the securities markets as a temporary substitute for purchasing particular securities or to enhance income or gain. Derivatives are financial contracts or instruments whose value depends on, or is derived from, the value of an underlying asset, reference rate or index (or relationship between two indices). The Trust also may use derivatives to add leverage to the portfolio and/or to hedge against increases in the Trust’s costs associated with any leverage strategy that it may employ. The use of Strategic Transactions to enhance current income may be speculative.

Strategic Transactions involve risks. The risks associated with Strategic Transactions include (i) the imperfect correlation between the value of such instruments and the underlying assets, (ii) the possible default of the counterparty to the transaction, (iii) illiquidity of the derivative instruments, and (iv) high volatility losses caused by unanticipated market movements, which are potentially unlimited. Although both OTC and exchange-traded derivatives markets may experience a lack of liquidity, OTC non-standardized derivative transactions are generally less liquid than exchange-traded instruments. The illiquidity of the derivatives markets may be due to various factors, including congestion, disorderly markets, limitations on deliverable supplies, the participation of speculators, government regulation and intervention, and technical and operational or system failures. In addition, daily limits on price fluctuations and speculative position limits on exchanges on which the Trust may conduct its transactions in derivative instruments may prevent prompt liquidation of positions, subjecting the Trust to the potential of greater losses. Furthermore, the Trust’s ability to successfully use Strategic Transactions depends on the Advisor’s ability to predict pertinent asset prices, interest rates, currency exchange rates and other economic factors, which cannot be assured. The use of Strategic Transactions may result in losses greater than if they had not been used, may require the Trust to sell or purchase portfolio securities at inopportune times or for prices other than current market values, may limit the amount of appreciation the Trust can realize on an investment or may cause the Trust to hold a security that it might otherwise sell. Additionally, amounts paid by the Trust as premiums and cash or other assets held in margin accounts

with respect to Strategic Transactions are not otherwise available to the Trust for investment purposes. Please see the Trust’s SAI for a more detailed description of Strategic Transactions and the various derivative instruments the Trust may use and the various risks associated with them.

Exchange-traded derivatives and OTC derivative transactions submitted for clearing through a central counterparty have become subject to minimum initial and variation margin requirements set by the relevant clearinghouse, as well as possible margin requirements mandated by the SEC or the CFTC. The CFTC and federal banking regulators also have imposed margin requirements on non-cleared OTC derivatives, and the SEC’s non-cleared margin requirements for security-based swaps became effective on November 1, 2021. Applicable margin requirements may increase the overall costs for the Trust.

Many OTC derivatives are valued on the basis of dealers’ pricing of these instruments. However, the price at which dealers value a particular derivative and the price that the same dealers would actually be willing to pay for such derivative should the Trust wish or be forced to sell such position may be materially different. Such differences can result in an overstatement of the Trust’s NAV and may materially adversely affect the Trust in situations in which the Trust is required to sell derivative instruments.

While hedging can reduce or eliminate losses, it can also reduce or eliminate gains. Hedges are sometimes subject to imperfect matching between the derivative and the underlying security, and there can be no assurance that the Trust’s hedging transactions will be effective.

Derivatives may give rise to a form of leverage and may expose the Trust to greater risk and increase its costs. Recent legislation calls for new regulation of the derivatives markets. The extent and impact of the regulation is not yet known and may not be known for some time. New regulation may make derivatives more costly, may limit the availability of derivatives, or may otherwise adversely affect the value or performance of derivatives.

Future regulatory developments may impact the Trust’s ability to invest or remain invested in certain derivatives. Legislation or regulation may also change the way in which the Trust itself is regulated. The Advisor cannot predict the effects of any new governmental regulation that may be implemented on the ability of the Trust to use swaps or any other financial derivatives product, and there can be no assurance that any new governmental regulation will not adversely affect the Trust’s ability to achieve its investment objectives.

Counterparty Risk. The Trust will be subject to credit risk with respect to the counterparties to the derivative contracts entered into by the Trust. Because derivative transactions in which the Trust may engage may involve instruments that are not traded on an exchange or cleared through a central counterparty but are instead traded between counterparties based on contractual relationships, the Trust is subject to the risk that a counterparty will not perform its obligations under the related contracts. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Trust may experience significant delays in obtaining any recovery in bankruptcy or other reorganization proceedings. The Trust may obtain only a limited recovery, or may obtain no recovery, in such circumstances. Although the Trust intends to enter into transactions only with counterparties that the Advisor believes to be creditworthy, there can be no assurance that, as a result, a counterparty will not default and that the Trust will not sustain a loss on a transaction. In the event of the counterparty’s bankruptcy or insolvency, the Trust’s collateral may be subject to the conflicting claims of the counterparty’s creditors, and the Trust may be exposed to the risk of a court treating the Trust as a general unsecured creditor of the counterparty, rather than as the owner of the collateral.

The counterparty credit risk for cleared derivatives is generally lower than for uncleared OTC derivative transactions since a clearing organization is the each counterparty to a cleared derivative contract and a clearing organization is generally considered to be of better credit quality than a counterparty to an uncleared OTC derivative transaction.

However, there can be no assurance that a clearing organization, or its members, will satisfy its obligations to the Trust, or that the Trust would be able to recover the full amount of assets deposited on its behalf with the clearing organization in the event of the default by the clearing organization or the Trust’s clearing broker. In addition, cleared derivative transactions benefit from daily marking-to-market and settlement, and segregation and minimum capital requirements applicable to intermediaries. Uncleared OTC derivative transactions generally may not benefit from such protections. This exposes the Trust to the risk that a counterparty will not settle a transaction in accordance with its terms and conditions because of a dispute over the terms of the contract (whether or not bona fide) or because of a

credit or liquidity problem, thus causing the Trust to suffer a loss. Such “counterparty risk” is accentuated for contracts with longer maturities where events may intervene to prevent settlement, or where the Trust has concentrated its transactions with a single or small group of counterparties.

In addition, the Trust is subject to the risk that issuers of the instruments in which it invests and trades may default on their obligations under those instruments, and that certain events may occur that have an immediate and significant adverse effect on the value of those instruments. There can be no assurance that an issuer of an instrument in which the Trust invests will not default, or that an event that has an immediate and significant adverse effect on the value of an instrument will not occur, and that the Trust will not sustain a loss on a transaction as a result.

Swaps Risk. Swaps are a type of derivative. Swap agreements involve the risk of changes in market value of the swap position as well as the risk that the swap counterparty will default on its payment or other obligations to the Trust and the risk that the Trust will not be able to meet its obligations to pay the other party to the agreement. In order to seek to hedge the value of the Trust’s portfolio, to hedge against increases in the Trust’s cost associated with interest payments on any outstanding borrowings or to seek to increase the Trust’s return, the Trust may enter into swaps, including interest rate swap, total return swap (sometimes referred to as a “contract for difference”) and/or credit default swap transactions. In interest rate swap transactions, there is a risk that yields will move in the direction opposite of the direction anticipated by the Trust, which would cause the Trust to make payments to its counterparty in the transaction that could adversely affect Trust performance. In addition to the risks applicable to swaps generally (including counterparty risk, high volatility, illiquidity risk and credit risk), credit default swap transactions involve special risks because they are difficult to value, are highly susceptible to liquidity and credit risk, and generally pay a return to the party that has paid the premium only in the event of an actual default or other credit event by the issuer of the underlying obligation (as opposed to a credit downgrade or other indication of financial difficulty).

The United States, the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the “Dodd-Frank Act”), requires that certain derivatives with U.S. persons must be executed on a regulated market and a substantial portion of OTC derivatives must be submitted for clearing to regulated clearinghouses. As a result, swap transactions entered into by the Trust may become subject to various requirements applicable to swaps under the Dodd-Frank Act, including clearing, exchange-execution, reporting and recordkeeping requirements, which may make it more difficult and costly for the Trust to enter into swap transactions and may also render certain strategies in which the Trust might otherwise engage impossible or so costly that they will no longer be economical to implement. Furthermore, the number of counterparties that may be willing to enter into swap transactions with the Trust may also be limited if the swap transactions with the Trust are subject to the swap regulation under the Dodd-Frank Act.

Credit default and total return swap agreements may effectively add leverage to the Trust’s portfolio because, in addition to its Managed Assets, the Trust would be subject to investment exposure on the notional amount of the swap in excess of any premium and margin required to establish and maintain the position. Total return swap agreements are subject to market risk as well as the risk that a counterparty will default on its payment obligations to the Trust thereunder. The Trust is not required to enter into swap transactions for hedging purposes or to enhance income or gain and may choose not to do so. In addition, the swaps market is subject to a changing regulatory environment. It is possible that regulatory or other developments in the swaps market could adversely affect the Trust’s ability to successfully use swaps.

When-Issued, Forward Commitment and Delayed Delivery Transactions Risk

The Trust may purchase securities on a when-issued basis (including on a forward commitment or “TBA” (to be announced) basis) and may purchase or sell securities for delayed delivery. When-issued and delayed delivery transactions occur when securities are purchased or sold by the Trust with payment and delivery taking place in the future to secure an advantageous yield or price. Securities purchased on a when-issued or delayed delivery basis may expose the Trust to counterparty risk of default as well as the risk that securities may experience fluctuations in value prior to their actual delivery. The Trust will not accrue income with respect to a when-issued or delayed delivery security prior to its stated delivery date. Purchasing securities on a when-issued or delayed delivery basis can involve the additional risk that the price or yield available in the market when the delivery takes place may not be as favorable as that obtained in the transaction itself.

Repurchase Agreements Risk

Subject to its investment objectives and policies, the Trust may enter into repurchase agreements. Repurchase agreements typically involve the acquisition by the Trust of fixed-income securities from a selling financial institution such as a bank, savings and loan association or broker-dealer. The agreement provides that the Trust will sell the securities back to the institution at a fixed time in the future. The Trust does not bear the risk of a decline in the value of the underlying security unless the seller defaults under its repurchase obligation. In the event of the bankruptcy or other default of a seller of a repurchase agreement, the Trust could experience both delays in liquidating the underlying securities and losses, including possible decline in the value of the underlying security during the period in which the Trust seeks to enforce its rights thereto; possible lack of access to income on the underlying security during this period; and expenses of enforcing its rights. While repurchase agreements involve certain risks not associated with direct investments in fixed-income securities, the Trust follows procedures approved by the Board that are designed to minimize such risks. In addition, the value of the collateral underlying the repurchase agreement will be at least equal to the repurchase price, including any accrued interest earned on the repurchase agreement. In the event of a default or bankruptcy by a selling financial institution, the Trust generally will seek to liquidate such collateral. However, the exercise of the Trust’s right to liquidate such collateral could involve certain costs or delays and, to the extent that proceeds from any sale upon a default of the obligation to repurchase were less than the repurchase price, the Trust could suffer a loss.

Valuation Risk

The Trust is subject to valuation risk, which is the risk that one or more of the securities in which the Trust invests are valued at prices that the Trust is unable to obtain upon sale due to factors such as incomplete data, market instability or human error. The Advisor may use an independent pricing service or prices provided by dealers to value securities at their market value. Because the secondary markets for certain investments may be limited, such instruments may be difficult to value. See “Net Asset Value.” When market quotations are not available, the Advisor may price such investments pursuant to a number of methodologies, such as computer-based analytical modeling or individual security evaluations. These methodologies generate approximations of market values, and there may be significant professional disagreement about the best methodology for a particular type of financial instrument or different methodologies that might be used under different circumstances. In the absence of an actual market transaction, reliance on such methodologies is essential, but may introduce significant variances in the ultimate valuation of the Trust’s investments. Technological issues and/or errors by pricing services or other third-party service providers may also impact the Trust’s ability to value its investments and the calculation of the Trust’s NAV.

When market quotations are not readily available or are believed by the Advisor to be unreliable, the Advisor will fair value the Trust’s investments in accordance with its policies and procedures. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Trust is the amount the Trust might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Fair value pricing may require determinations that are inherently subjective and inexact about the value of a security or other asset. As a result, there can be no assurance that fair value priced assets will not result in future adjustments to the prices of securities or other assets, or that fair value pricing will reflect a price that the Trust is able to obtain upon sale, and it is possible that the fair value determined for a security or other asset will be materially different from quoted or published prices, from the prices used by others for the same security or other asset and/or from the value that actually could be or is realized upon the sale of that security or other asset. For example, the Trust’s NAV could be adversely affected if the Trust’s determinations regarding the fair value of the Trust’s investments were materially higher than the values that the Trust ultimately realizes upon the disposal of such investments. Where market quotations are not readily available, valuation may require more research than for more liquid investments. In addition, elements of judgment may play a greater role in valuation in such cases than for investments with a more active secondary market because there is less reliable objective data available. The Advisor anticipates that up to approximately 25% of the Trust’s net assets (calculated at the time of investment) may be valued using fair value. This percentage may increase over the life of the Trust and may exceed 25% of the Trust’s net assets due to a number of factors, such as when the Trust nears dissolution; outflows of cash from time to time; and changes in the valuation of these investments. The Trust prices its shares daily and therefore all assets, including assets valued at fair value, are valued daily.

The Trust’s NAV per common share is a critical component in several operational matters including computation of advisory and services fees. Consequently, variance in the valuation of the Trust’s investments will impact, positively or negatively, the fees and expenses shareholders will pay.

Event Risk

Event risk is the risk that corporate issuers may undergo restructurings, such as mergers, leveraged buyouts, takeovers, or similar events financed by increased debt. As a result of the added debt, the credit quality and market value of a company’s securities may decline significantly.

Defensive Investing Risk

For defensive purposes, the Trust may allocate assets into cash or short-term fixed-income securities without limitation. In doing so, the Trust may succeed in avoiding losses but may otherwise fail to achieve its investment objectives. Further, the value of short-term fixed-income securities may be affected by changing interest rates and by changes in credit ratings of the investments. If the Trust holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash.

Securities Lending Risk

The Trust may lend securities to financial institutions. Securities lending involves exposure to certain risks, including operational risk (i.e., the risk of losses resulting from problems in the settlement and accounting process), “gap” risk (i.e., the risk of a mismatch between the return on cash collateral reinvestments and the fees the Trust has agreed to pay a borrower), foreign exchange risk (i.e., the risk of a shortfall at default when a cash collateral investment is denominated in a currency other than the currency of the assets being loaned due to movements in foreign exchange rates), and credit, legal, counterparty and market risks. If a securities lending counterparty were to default, the Trust would be subject to the risk of a possible delay in receiving collateral or in recovering the loaned securities, or to a possible loss of rights in the collateral. In the event a borrower does not return the Trust’s securities as agreed, the Trust may experience losses if the proceeds received from liquidating the collateral do not at least equal the value of the loaned security at the time the collateral is liquidated, plus the transaction costs incurred in purchasing replacement securities. This event could trigger adverse tax consequences for the Trust. The Trust could lose money if its short-term investment of the collateral declines in value over the period of the loan. Substitute payments for dividends received by the Trust for securities loaned out by the Trust will generally not be considered qualified dividend income. The securities lending agent will take the tax effects on shareholders of this difference into account in connection with the Trust’s securities lending program. Substitute payments received on tax-exempt securities loaned out will generally not be tax-exempt income.

Inflation Risk

Inflation risk is the risk that the value of assets or income from investment will be worth less in the future, as inflation decreases the value of money. Inflation rates may change frequently and drastically as a result of various factors, including unexpected shifts in the domestic or global economy. As inflation increases, the real value of the common shares and distributions on those shares can decline. In addition, during any periods of rising inflation, interest rates on any borrowings by the Trust would likely increase, which would tend to further reduce returns to the holders of common shares.

Deflation Risk

Deflation risk is the risk that prices throughout the economy decline over time, which may have an adverse effect on the market valuation of companies, their assets and their revenues. In addition, deflation may have an adverse effect on the creditworthiness of issuers and may make issuer default more likely, which may result in a decline in the value of the Trust’s portfolio.

Risks Associated with Recent Market Events

Although interest rates were unusually low in recent years in the U.S. and abroad, in 2022, the Federal Reserve and certain foreign central banks raised interest rates as part of their efforts to address rising inflation. The Federal Reserve

and certain foreign central banks have started to lower interest rates, though economic or other factors, such as inflation, could stop such changes. It is difficult to accurately predict the pace at which interest rates might change, the timing, frequency or magnitude of any such changes in interest rates, or when such changes might stop or again reverse course. Additionally, various economic and political factors could cause the Federal Reserve or other foreign central banks to change their approach in the future and such actions may result in an economic slowdown both in the U.S. and abroad. Unexpected changes in interest rates could lead to significant market volatility or reduce liquidity in certain sectors of the market. Deteriorating economic fundamentals may, in turn, increase the risk of default or insolvency of particular issuers, negatively impact market value, cause credit spreads to widen, and reduce bank balance sheets. Any of these could cause an increase in market volatility, reduce liquidity across various markets or decrease confidence in the markets, which could negatively affect the value of debt instruments held by the Trust and result in a negative impact on the Trust’s performance.

Recent policy initiatives undertaken by the U.S. government have the potential to impact international relations, trade agreements and the overall regulatory environment in ways that could create uncertainty and instability in domestic and global markets, and could adversely affect the investment performance of the Trust. In particular, actions taken by the U.S. government in respect of international trade relations could lead to trade wars, increased costs for imported goods, disruptions in supply chains, reduced foreign investment, and instability in regions where the Trust invests. Political and diplomatic events within the United States, including a contentious domestic political environment, changes in political party control of one or more branches of the U.S. Government, the U.S. Government’s inability at times to agree on a long-term budget and deficit reduction plan, the threat of a U.S. Government shutdown, and disagreements over, or threats not to increase, the U.S. Government’s borrowing limit (or “debt ceiling”), as well as political and diplomatic events abroad, may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree. A downgrade of the ratings of U.S. Government debt obligations, or concerns about the U.S. Government’s credit quality in general, could have a substantial negative effect on the U.S. and global economies. For example, concerns about the U.S. Government’s credit quality may cause increased volatility in the stock and bond markets, higher interest rates, reduced prices and liquidity of U.S. Treasury securities, and/or increased costs of various kinds of debt. Moreover, although the U.S. Government has honored its credit obligations, there remains a possibility that the United States could default on its obligations. The consequences of such an unprecedented event are impossible to predict, but it is likely that a default by the United States would be highly disruptive to the U.S. and global securities markets and could significantly impair the value of the Trust’s investments.

In recent years, some countries, including the United States, have adopted more protectionist trade policies. Slowing global economic growth, the rise in protectionist trade policies, inflationary pressures, changes to some major international trade agreements, risks associated with the trade agreements between countries and regions, including the U.S. and other foreign nations, political or economic dysfunction within some countries or regions, including the U.S., and dramatic changes in commodity and currency prices could affect the economies of many nations in ways that cannot necessarily be foreseen at the present time. In addition, if the U.S. dollar continues to be strong, it may decrease foreign demand for U.S. assets, which could have a negative impact on certain issuers and/or industries.

Market Disruption and Geopolitical Risk

Investments by the Trust are materially affected by conditions in the global financial markets and economic and political conditions throughout the world, such as interest rates, the availability and cost of credit, inflation rates, economic uncertainty, changes in laws, trade policies, commodity prices, tariffs, currency exchange rates and controls and national and international political circumstances (including wars and other forms of conflict, terrorist acts, and security operations) and catastrophic events such as fires, floods, earthquakes, tornados, hurricanes and pandemics could materially affect the Trust’s investments to the extent it materially affects global economies or global financial markets.

Additionally, the occurrence of events similar to those in recent years, such as localized wars, instability, new and ongoing epidemics and pandemics of infectious diseases and other global health events, natural/environmental disasters, terrorist attacks in the United States and around the world, social and political discord, debt crises, sovereign debt downgrades, increasingly strained relations between the United States and a number of foreign countries, new and continued political unrest in various countries, the exit or potential exit of one or more countries from the European Union, continued changes in the balance of political power among and within the branches of the U.S. government,

government shutdowns and other factors, may result in market volatility, may have long term effects on the United States and worldwide financial markets, and may cause further economic uncertainties in the United States and worldwide and could have a significant adverse impact on the value and risk profile of the Trust’s portfolio. These factors are outside of the Trust’s control and may affect the level and volatility of securities prices and the liquidity and value of the Trust’s portfolio investments, and the Trust may not be able to successfully manage its exposure to these conditions, which may result in substantial losses to Shareholders.

Russia launched a large-scale invasion of Ukraine on February 24, 2022. The extent and duration of this military action, resulting sanctions and future local, regional or global market disruptions, are impossible to predict, but could be significant. Any such disruptions caused by Russian military action or other actions (including cyberattacks and espionage) or resulting actual and threatened responses to such activity, including purchasing and financing restrictions, boycotts or changes in consumer or purchaser preferences, sanctions, tariffs or cyberattacks on Russian entities or individuals, including politicians, could have a severe adverse effect on the region, including significant negative economic impacts. How long such military action and related events will last cannot be predicted.

In recent years, the U.S. government has indicated its intent to alter its approach to international trade policy and in some cases to renegotiate, or potentially terminate, certain existing bilateral or multi-lateral trade agreements and treaties with foreign countries, and has made proposals and taken actions related thereto, including the imposition of tariffs on imported goods. Tariffs on imported goods could further increase costs, decrease margins, reduce the competitiveness of products and services offered by current and future portfolio companies and adversely affect the revenues and profitability of portfolio companies whose businesses rely on goods imported from such impacted jurisdictions. More generally, these actions may trigger a significant reduction in international trade, the oversupply of certain manufactured goods, substantial price reductions of goods and possible failure of individual companies and/or large segments of a foreign country’s export industry, which could have a negative impact on the Trust’s performance. The U.S. government has imposed, and may in the future further increase, tariffs on certain foreign goods, including from China, such as steel and aluminum. Some foreign governments, including China, have instituted retaliatory tariffs on certain U.S. goods. Most recently, the current U.S. presidential administration has imposed or sought to impose significant increases to tariffs on goods imported into the United States, including from China, Canada and Mexico. U.S. companies that source material and goods from China and those that make large amounts of sales in China would be particularly vulnerable to an escalation of trade tensions. Uncertainty regarding the outcome of the trade tensions and the potential for a trade war could cause the U.S. dollar to decline against safe-haven currencies, such as the Japanese yen and the euro. Events such as these, and their consequences, are difficult to predict and it is unclear whether further tariffs may be imposed or other escalating actions may be taken in the future. Increased trade tensions could have a material adverse effect on the global economy. The Trust and its portfolio investments could be materially and adversely affected.

Cybersecurity incidents affecting particular companies or industries may adversely affect the economies of particular countries of the world in which the Trust invests.

The occurrence of any of these above events could have a significant adverse impact on the value and risk profile of the Trust’s portfolio. The Trust does not know how long the securities markets may be affected by similar events and cannot predict the effects of similar events in the future on the U.S. economy and securities markets. There can be no assurance that similar events and other market disruptions will not have other material and adverse implications.

Regulation and Government Intervention Risk

Federal, state, and other governments, their regulatory agencies or self-regulatory organizations may take actions that affect the regulation of the issuers in which the Trust invests in ways that are unforeseeable. Legislation or regulation may also change the way in which the Trust is regulated. Such legislation or regulation could limit or preclude the Trust’s ability to achieve its investment objectives.

In light of popular, political and judicial focus on finance related consumer protection, financial institution practices are also subject to greater scrutiny and criticism generally. In the case of transactions between financial institutions and the general public, there may be a greater tendency toward strict interpretation of terms and legal rights in favor of the consuming public, particularly where there is a real or perceived disparity in risk allocation and/or where consumers are perceived as not having had an opportunity to exercise informed consent to the transaction. In the event of conflicting interests between retail investors holding common shares of a closed-end investment company such as

the Trust and a large financial institution, a court may similarly seek to strictly interpret terms and legal rights in favor of retail investors.

The Trust may be affected by governmental action in ways that are not foreseeable, and there is a possibility that such actions could have a significant adverse effect on the Trust and its ability to achieve its investment objective.

Investment Company Act Regulations

The Trust is a registered closed-end management investment company and as such is subject to regulations under the Investment Company Act. Generally speaking, any contract or provision thereof that is made, or where performance involves a violation of the Investment Company Act or any rule or regulation thereunder is unenforceable by either party unless a court finds otherwise.

Regulation as a “Commodity Pool”

The CFTC subjects advisers to registered investment companies to regulation by the CFTC if a fund that is advised by the investment adviser either (i) invests, directly or indirectly, more than a prescribed level of its liquidation value in CFTC-regulated futures, options and swaps (“CFTC Derivatives”), or (ii) markets itself as providing investment exposure to such instruments. To the extent the Trust uses CFTC Derivatives, it intends to do so below such prescribed levels and will not market itself as a “commodity pool” or a vehicle for trading such instruments. Accordingly, the Advisor has claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act (“CEA”) pursuant to Rule 4.5 under the CEA. The Advisor is not, therefore, subject to registration or regulation as a “commodity pool operator” under the CEA in respect of the Trust.

Failures of Futures Commission Merchants and Clearing Organizations Risk

The Trust is required to deposit funds to margin open positions in cleared derivative instruments (both futures and swaps) with a clearing broker registered as a “futures commission merchant” (“FCM”). The CEA requires an FCM to segregate all funds received from customers with respect to any orders for the purchase or sale of U.S. domestic futures contracts and cleared swaps from the FCM’s proprietary assets. Similarly, the CEA requires each FCM to hold in a separate secure account all funds received from customers with respect to any orders for the purchase or sale of foreign futures contracts and segregate any such funds from the funds received with respect to domestic futures contracts. However, all funds and other property received by an FCM from its customers are held by an FCM on a commingled basis in an omnibus account and amounts in excess of assets posted to the clearing organization may be invested by an FCM in certain instruments permitted under the applicable regulation. There is a risk that assets deposited by the Trust with any FCM as margin for futures contracts or commodity options may, in certain circumstances, be used to satisfy losses of other clients of the Trust’s FCM. In addition, the assets of the Trust posted as margin against both swaps and futures contracts may not be fully protected in the event of the FCM’s bankruptcy.

Legal, Tax and Regulatory Risks

Legal, tax and regulatory changes could occur that may have material adverse effects on the Trust.

To qualify for the favorable U.S. federal income tax treatment generally accorded to RICs, the Trust must, among other things, derive in each taxable year at least 90% of its gross income from certain prescribed sources and distribute for each taxable year at least 90% of its “investment company taxable income” (generally, ordinary income plus the excess, if any, of net short-term capital gain over net long-term capital loss). If for any taxable year the Trust does not qualify as a RIC, all of its taxable income for that year (including its net capital gain) would be subject to tax at regular corporate rates without any deduction for distributions to shareholders, and such distributions would be taxable as ordinary dividends to the extent of the Trust’s current and accumulated earnings and profits.

The current presidential administration has called for significant changes to U.S. fiscal, tax, trade, healthcare, immigration, foreign, and government regulatory policy. In this regard, there is significant uncertainty with respect to legislation, regulation and government policy at the federal level, as well as the state and local levels. Recent events have created a climate of heightened uncertainty and introduced new and difficult-to-quantify macroeconomic and political risks with potentially far-reaching implications. There has been a corresponding meaningful increase in the uncertainty surrounding interest rates, inflation, foreign exchange rates, trade volumes and fiscal and monetary policy.

To the extent the U.S. Congress or the current presidential administration implements changes to U.S. policy, those changes may impact, among other things, the U.S. and global economy, international trade and relations, unemployment, immigration, corporate taxes, healthcare, the U.S. regulatory environment, inflation and other areas. Although the Trust cannot predict the impact, if any, of these changes to the Trust’s business, they could adversely affect the Trust’s business, financial condition, operating results and cash flows. Until the Trust knows what policy changes are made and how those changes impact the Trust’s business and the business of the Trust’s competitors over the long term, the Trust will not know if, overall, the Trust will benefit from them or be negatively affected by them.

The rules dealing with U.S. federal income taxation are constantly under review by persons involved in the legislative process and by the IRS and the U.S. Treasury Department. Revisions in U.S. federal tax laws and interpretations of these laws could adversely affect the tax consequences of your investment.

Potential Conflicts of Interest of the Advisor and Others

The investment activities of the Advisor and its affiliates (including BlackRock, Inc. and its subsidiaries (collectively, the “Affiliates”)), and their respective directors, officers or employees, in managing their own accounts and other accounts, may present conflicts of interest that could disadvantage the Trust and its shareholders. The Advisor and its Affiliates may engage in proprietary trading and advise accounts and other funds that have investment objectives similar to those of the Trust and/or that engage in and compete for transactions in the same or similar types of securities, currencies and other assets as are held by the Trust. Subject to the requirements of the Investment Company Act, the Advisor and its Affiliates intend to engage in such activities and may receive compensation from third parties for their services. Neither the Advisor nor any Affiliate is under any obligation to share any investment opportunity, idea or strategy with the Trust. As a result, an Affiliate may compete with the Trust for appropriate investment opportunities. The results of the Trust’s investment activities, therefore, may differ from those of an Affiliate and of another account managed by an Affiliate. It is possible that the Trust could sustain losses during periods in which one or more Affiliates and other accounts achieve profits on their trading for proprietary or other accounts. The opposite result is also possible. The Advisor has adopted policies and procedures designed to address potential conflicts of interest. For additional information about potential conflicts of interest and the way in which BlackRock addresses such conflicts, please see “Conflicts of Interest” and “Management of the Trust—Portfolio Management—Potential Material Conflicts of Interest” in the SAI.

Decision-Making Authority Risk

Investors have no authority to make decisions or to exercise business discretion on behalf of the Trust, except as set forth in the Trust’s governing documents. The authority for all such decisions is generally delegated to the Board, which in turn, has delegated the day-to-day management of the Trust’s investment activities to the Advisor, subject to oversight by the Board.

Management Risk

The Trust is subject to management risk because it is an actively managed investment portfolio. The Advisor and the individual portfolio managers will apply investment techniques and risk analyses in making investment decisions for the Trust, but there can be no guarantee that these will produce the desired results. The Trust may be subject to a relatively high level of management risk because the Trust may invest in derivative instruments, which may be highly specialized instruments that require investment techniques and risk analyses different from those associated with equities and bonds.

Reliance on the Advisor Risk

The Trust is dependent upon services and resources provided by the Advisor, and therefore the Advisor’s parent, BlackRock. The Advisor is not required to devote its full time to the business of the Trust and there is no guarantee or requirement that any investment professional or other employee of the Advisor will allocate a substantial portion of his or her time to the Trust. The loss of one or more individuals involved with the Advisor could have a material adverse effect on the performance or the continued operation of the Trust. For additional information on the Advisor and BlackRock, see “Management of the Trust—Investment Advisor.”

Reliance on Service Providers Risk

The Trust must rely upon the performance of service providers to perform certain functions, which may include functions that are integral to the Trust’s operations and financial performance. Failure by any service provider to carry out its obligations to the Trust in accordance with the terms of its appointment, to exercise due care and skill or to perform its obligations to the Trust at all as a result of insolvency, bankruptcy or other causes could have a material adverse effect on the Trust’s performance and returns to shareholders. The termination of the Trust’s relationship with any service provider, or any delay in appointing a replacement for such service provider, could materially disrupt the business of the Trust and could have a material adverse effect on the Trust’s performance and returns to shareholders.

Information Technology Systems Risk

The Trust is dependent on the Advisor for certain management services as well as back-office functions. The Advisor depends on information technology systems in order to assess investment opportunities, strategies and markets and to monitor and control risks for the Trust. It is possible that a failure of some kind which causes disruptions to these information technology systems could materially limit the Advisor’s ability to adequately assess and adjust investments, formulate strategies and provide adequate risk control. Any such information technology-related difficulty could harm the performance of the Trust. Further, failure of the back-office functions of the Advisor to process trades in a timely fashion could prejudice the investment performance of the Trust.

Operational and Technology Risks

The Trust and the entities with which it interacts directly or indirectly are susceptible to operational and technology risks, including those related to human errors, processing errors, communication errors, systems failures, cybersecurity incidents, and the use of artificial intelligence and machine learning (“AI”), which may result in losses for the Trust and its shareholders or impair the Trust’s operations. These entities include, but are not limited to, the Trust’s adviser, administrator, distributor, other service providers (e.g., index and benchmark providers, accountants, custodians, and transfer agents), financial intermediaries, counterparties, market makers, authorized participants, listing exchanges, other financial market operators, and governmental authorities. Operational and technology risks for the issuers in which the Trust invests could also result in material adverse consequences for such issuers and may cause the Trust’s investments in such issuers to lose value. The Trust may incur substantial costs in order to mitigate operational and technology risks.

Cybersecurity incidents can result from deliberate attacks or unintentional events against an issuer in which the Trust invests, the Trust or any of its service providers. They include, but are not limited to, gaining unauthorized access to systems, misappropriating assets or sensitive information, corrupting or destroying data, and causing operational disruption. Geopolitical tension may increase the scale and sophistication of deliberate attacks, particularly those from nation states or from entities with nation state backing. Cybersecurity incidents may result in any of the following: financial losses; interference with the Trust’s ability to calculate its NAV; disclosure of confidential information; impediments to trading; submission of erroneous trades by the Trust or erroneous subscription or redemption orders; the inability of the Trust or its service providers to transact business; violations of applicable privacy and other laws; regulatory fines; penalties; reputational damage; reimbursement or other compensation costs; and other legal and compliance expenses. Furthermore, cybersecurity incidents may render records of the Trust, including records relating to its assets and transactions, shareholder ownership of Trust shares, and other data integral to the Trust’s functioning, inaccessible, inaccurate or incomplete. Power outages, natural disasters, equipment malfunctions and processing errors that threaten information and technology systems relied upon by the Trust or its service providers, as well as market events that occur at a pace that overloads these systems, may also disrupt business operations or impact critical data.

AI refers to computer systems that can perform tasks that would otherwise require human intelligence and encompasses various different forms of artificial intelligence, including machine learning models. AI is typically designed to analyze data, learn from patterns and experiences, make decisions, and solve problems. The risks of increased use of AI technologies, such as machine learning, include data risk, transparency risk, and operational risk. The AI technologies, which are generally highly reliant on the collection and analysis of large amounts of data, may incorporate biased or inaccurate data, and it is not possible or practicable to incorporate all relevant data into such technologies. The output or results of any such AI technologies may therefore be incomplete, erroneous, distorted or misleading. Further, AI tools may lack transparency as to how data is utilized and how outputs are generated. AI technologies may also allow the unintended introduction of vulnerabilities into infrastructures and applications. The

Trust and its shareholders could be negatively impacted as a result of these risks associated with AI technologies. AI technologies and their current and potential future applications, and the regulatory frameworks within which they operate, continue to quickly evolve, and it is impossible to anticipate the full scope of future AI capabilities or rules and the associated risks to the Trust.

While the Trust’s service providers are required to have appropriate operational, information security and cybersecurity risk management policies and procedures, their methods of risk management may differ from those of the Trust in the setting of priorities, the personnel and resources available or the effectiveness of relevant controls. The Trust and its adviser seek to reduce these risks through controls, procedures and oversight, including establishing business continuity plans and risk management systems. However, there are inherent limitations in such plans and systems, including the possibility that certain risks that may affect the Trust have not been identified or may emerge in the future; that such plans and systems may not completely eliminate the occurrence or mitigate the effects of operational or information security disruptions or failures or of cybersecurity incidents; or that prevention and remediation efforts will not be successful or that incidents will go undetected. The Trust cannot control the systems, information security or other cybersecurity of the issuers in which it invests or its service providers, counterparties, and other third parties whose activities affect the Trust.

Lastly, the regulatory climate governing cybersecurity and data protection is developing quickly and may vary considerably across jurisdictions. Regulators continue to develop new rules and standards related to cybersecurity and data protection. Compliance with evolving regulations can be demanding and costly, requiring substantial resources to monitor and implement required changes.

Misconduct of Employees and of Service Providers Risk

Misconduct or misrepresentations by employees of the Advisor or the Trust’s service providers could cause significant losses to the Trust. Employee misconduct may include binding the Trust to transactions that exceed authorized limits or present unacceptable risks and unauthorized trading activities, concealing unsuccessful trading activities (which, in any case, may result in unknown and unmanaged risks or losses) or making misrepresentations regarding any of the foregoing. Losses could also result from actions by the Trust’s service providers, including, without limitation, failing to recognize trades and misappropriating assets. In addition, employees and service providers may improperly use or disclose confidential information, which could result in litigation or serious financial harm, including limiting the Trust’s business prospects or future marketing activities. Despite the Advisor’s due diligence efforts, misconduct and intentional misrepresentations may be undetected or not fully comprehended, thereby potentially undermining the Advisor’s due diligence efforts. As a result, no assurances can be given that the due diligence performed by the Advisor will identify or prevent any such misconduct.

Portfolio Turnover Risk

The Trust’s annual portfolio turnover rate may vary greatly from year to year, as well as within a given year. Portfolio turnover rate is not considered a limiting factor in the execution of investment decisions for the Trust. A higher portfolio turnover rate results in correspondingly greater brokerage commissions and other transactional expenses that are borne by the Trust. High portfolio turnover may result in an increased realization of net short-term capital gains by the Trust which, when distributed to common shareholders, will be taxable as ordinary income. Additionally, in a declining market, portfolio turnover may create realized capital losses.

Anti-Takeover Provisions Risk

The Trust’s Amended and Restated Agreement and Declaration of Trust and Amended and Restated Bylaws include provisions that could limit the ability of other entities or persons to acquire control of the Trust or convert the Trust to open-end status or to change the composition of the Board. Such provisions could limit the ability of shareholders to sell their shares at a premium over prevailing market prices by discouraging a third party from seeking to obtain control of the Trust. See “Certain Provisions in the Amended and Restated Agreement and Declaration of Trust and the Amended and Restated Bylaws.”

HOW THE TRUST MANAGES RISK

Investment Limitations

The Trust has adopted certain investment limitations designed to limit investment risk. Some of these limitations are fundamental and thus may not be changed without the approval of a majority of the Trust’s outstanding voting securities. See “Investment Objectives and Policies—Investment Restrictions” in the SAI for a complete list of the fundamental and non-fundamental investment policies of the Trust.

The restrictions and other limitations set forth throughout this prospectus and in the SAI apply only at the time of purchase of securities and will not be considered violated unless an excess or deficiency occurs or exists immediately after and as a result of the acquisition of securities.

Management of Investment Portfolio and Capital Structure to Limit Leverage Risk

The Trust may take certain actions if short-term interest rates increase or market conditions otherwise change (or the Trust anticipates such an increase or change) and the Trust’s leverage begins (or is expected) to adversely affect common shareholders. In order to attempt to offset such a negative impact of leverage on common shareholders, the Trust may shorten the average maturity of its investment portfolio (by investing in short-term securities) or may reduce its indebtedness or may exercise its right to call securities held in a TOBs issuer pursuant to the terms of TOB Residuals it holds. The success of any such attempt to limit leverage risk depends on the Advisor’s ability to accurately predict interest rate or other market changes. Because of the difficulty of making such predictions, the Trust may never attempt to manage its capital structure in the manner described in this paragraph.

If market conditions suggest that employing additional leverage would be beneficial, the Trust may enter into one or more credit facilities, increase any existing credit facilities, sell additional preferred shares or engage in additional leverage transactions, such as investments in TOB Residuals, subject to the restrictions of the Investment Company Act.

Strategic Transactions

The Trust may use various investment strategies designed to limit the risk of municipal security price fluctuations and to preserve capital. These hedging strategies include using financial futures contracts, options on financial futures or options based on either an index of long-term municipal securities or on taxable debt securities whose prices, in the opinion of the Advisor, correlate with the prices of the Trust’s investments. Successful implementation of most hedging strategies would generate taxable income and the Trust has no present intention to use these strategies.

MANAGEMENT OF THE TRUST

Trustees and Officers

The Board is responsible for the overall management of the Trust, including supervision of the duties performed by the Advisor. There are nine Trustees. A majority of the Trustees are not “interested persons” (as defined in the Investment Company Act) of the Trust (“Independent Trustees”).

The name and business address of the Trustees and officers of the Trust and their principal occupations and other affiliations during the past five years are set forth under “Management of the Trust” in the SAI.

Investment Advisor

The Advisor is responsible for the management of the Trust’s portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operation of the Trust. The Advisor, located at 100 Bellevue Parkway, Wilmington, Delaware 19809, is majority owned subsidiary of BlackRock.

BlackRock is one of the world’s largest publicly-traded investment management firms. As of December 31, 2025, BlackRock’s assets under management were approximately $14 trillion. BlackRock has over 35 years of experience

managing closed-end products and, as of December 31, 2025, advised a registered closed-end family of 49 exchange-listed active funds with approximately $44 billion in assets.

BlackRock is independent in ownership and governance, with no single majority shareholder and a majority of independent directors.

Investment Philosophy

BlackRock’s investment decision-making process for the municipal security sector is subject to the same discipline, oversight and investment philosophy that the firm applies to other sectors of the fixed income market.

BlackRock uses a relative value strategy that evaluates the trade-off between risk and return to seek to achieve the Trust’s investment objectives. This strategy is combined with disciplined risk control techniques and applied in sector, sub-sector and individual security selection decisions. BlackRock’s extensive personnel and technology resources are the key drivers of the investment philosophy.

Portfolio Managers

The members of the portfolio management team who are primarily responsible for the day-to-day management of the Trust’s portfolio are as follows:

Phillip Soccio, CFA, Director, is a Portfolio Manager for the Municipal Fixed Income business in BlackRock’s Portfolio Management Group.

Prior to assuming his current role in 2007, Mr. Soccio was a member of BlackRock’s Cash Management Group, where he was responsible for managing various tax-exempt money market funds. From 1998 to 2000, he was a member of BlackRock’s Account Management Group responsible for institutional client service and marketing support. Mr. Soccio began his career at BlackRock in 1998.

Mr. Soccio earned a BS degree in finance from Wilmington University.

Christian Romaglino CFA, Director, is a Portfolio Manager for the Municipal Fixed Income business within BlackRock’s Portfolio Management Group.

Prior to joining BlackRock in 2017, Mr. Romaglino was a Portfolio Manager at Brown Brothers Harriman focusing on a diverse set of institutional mandates and high net worth SMAs. Mr. Romaglino also held various trading and portfolio construction positions at Brown Brothers Harriman across several taxable fixed income sectors prior to 2010 when he transitioned to Municipals.

Mr. Romaglino earned a BS degree in Industrial Engineering from Lehigh University.

The SAI provides additional information about other accounts managed by the portfolio managers, compensation paid to the portfolio managers and ownership of the Trust’s securities by the portfolio managers.

Investment Management Agreement

Pursuant to an investment management agreement between the Advisor and the Trust (the “Investment Management Agreement”), the Trust has agreed to pay the Advisor a monthly management fee at an annual rate equal to 0.55% of the Trust’s Managed Assets.

“Managed Assets” means the total assets of the Trust (including any assets attributable to money borrowed for investment purposes) minus the sum of the Trust’s accrued liabilities (other than money borrowed for investment purposes). This means that during periods in which the Trust is using leverage, the fee paid to the Advisor will be higher than if the Trust did not use leverage because the fee is calculated as a percentage of the Trust’s Managed Assets, which include those assets purchased with leverage.

A discussion regarding the basis for the approval of the Investment Management Agreement by the Board is available in the Trust’s semi-annual report to shareholders for the period ended June 30, 2025.

Except as otherwise described in this prospectus, the Trust pays, in addition to the fees paid to the Advisor, all other costs and expenses of its operations, including compensation of its Trustees (other than those affiliated with the Advisor), custodian, leveraging expenses, transfer and dividend disbursing agent expenses, legal fees, rating agency fees, listing fees and expenses, expenses of independent auditors, expenses of repurchasing shares, expenses of preparing, printing and distributing shareholder reports, notices, proxy statements and reports to governmental agencies and taxes, if any.

The Trust and the Advisor have entered into the Fee Waiver Agreement, pursuant to which the Advisor has contractually agreed to waive the management fee with respect to any portion of the Trust’s assets attributable to investments in any equity and fixed-income mutual funds and ETFs managed by the Advisor or its affiliates and other exchange-traded products sponsored by the Advisor or its affiliates, in each case that have a contractual management fee, through June 30, 2027. In addition, pursuant to the Fee Waiver Agreement, the Advisor has contractually agreed to waive its management fees by the amount of investment advisory fees the Trust pays to the Advisor indirectly through its investment in money market funds advised by the Advisor or its affiliates, through June 30, 2027. The Fee Waiver Agreement may be continued from year to year thereafter, provided that such continuance is specifically approved by the Advisor and the Trust (including by a majority of the Trust’s Independent Trustees). Neither the Advisor nor the Trust is obligated to extend the Fee Waiver Agreement. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Trust (upon the vote of a majority of the Independent Trustees or a majority of the outstanding voting securities of the Trust), upon 90 days’ written notice by the Trust to the Advisor.

Administration and Accounting Services

State Street Bank and Trust Company provides certain administration and accounting services to the Trust pursuant to an Administration and Fund Accounting Services Agreement (the “Administration Agreement”). Pursuant to the Administration Agreement, State Street Bank and Trust Company provides the Trust with, among other things, customary fund accounting services, including computing the Trust’s NAV and maintaining books, records and other documents relating to the Trust’s financial and portfolio transactions, and customary fund administration services, including assisting the Trust with regulatory filings, tax compliance and other oversight activities. For these and other services it provides to the Trust, State Street Bank and Trust Company is paid a monthly fee from the Trust at an annual rate ranging from 0.0075% to 0.015% of the Trust’s Managed Assets, along with an annual fixed fee ranging from $3,000 to $10,000 for the services it provides to the Trust.

Custodian and Transfer Agent

The custodian of the assets of the Trust is State Street Bank and Trust Company, whose principal business address is One Congress Street, Boston, Massachusetts 02114. The custodian is responsible for, among other things, receipt of and disbursement of funds from the Trust’s accounts, establishment of segregated accounts as necessary, and transfer, exchange and delivery of Trust portfolio securities.

Computershare Trust Company, N.A., whose principal business address is 150 Royall Street, Canton, Massachusetts 02021, serves as the Trust’s transfer agent with respect to the common shares.

Independent Registered Public Accounting Firm

[ ], whose principal business address is [ ], is the independent registered public accounting firm of the Trust and is expected to render an opinion annually on the financial statements of the Trust.

NET ASSET VALUE

The NAV of the Trust’s common shares will be computed based upon the value of the Trust’s portfolio securities and other assets. NAV per common share will be determined as of the close of the regular trading session on the NYSE on each business day on which the NYSE is open for trading. The Trust calculates NAV per common share by subtracting the Trust’s liabilities (including accrued expenses, dividends payable and any borrowings of the Trust), and the liquidation value of any outstanding preferred shares of the Trust from the Trust’s total assets (the value of the securities the Trust holds plus cash or other assets, including interest accrued but not yet received) and dividing the result by the total number of common shares of the Trust outstanding.

Valuation of securities held by the Trust is as follows:

Equity Investments. Equity securities traded on a recognized securities exchange (e.g., NYSE), on separate trading boards of a securities exchange or through a market system that provides contemporaneous transaction pricing information (each, an “Exchange”) are valued using information obtained via independent pricing services generally at the Exchange closing price or if an Exchange closing price is not available, the last traded price on that Exchange prior to the time as of which the assets or liabilities are valued. However, under certain circumstances, other means of determining current market value may be used. If an equity security is traded on more than one Exchange, the current market value of the security where it is primarily traded generally will be used. In the event that there are no sales involving an equity security held by the Trust on a day on which the Trust values such security, the last bid (long positions) or ask (short positions) price, if available, will be used as the value of such security. If the Trust holds both long and short positions in the same security, the last bid price will be applied to securities held long and the last ask price will be applied to securities sold short. If no bid or ask price is available on a day on which the Trust values such security, the prior day’s price will be used, unless the Advisor determines that such prior day’s price no longer reflects the fair value of the security, in which case such asset would be treated as a Fair Value Asset (as defined below).

Fixed-Income Investments. Fixed-income securities are generally valued using bid prices provided by dealers or prices (including evaluated prices) supplied by the Trust’s approved independent third-party pricing services, each in accordance with the Advisor’s policies and procedures (the “Valuation Procedures”). The pricing services may use valuation models that utilize certain inputs and assumptions to derive values, including transaction data (e.g., recent representative bids and offers), credit quality information, perceived market movements, news, and other relevant information and by other methods, which may include consideration of: yields or prices of securities of comparable quality, coupon, maturity and type; indications as to values from dealers; general market conditions; and/or other factors and assumptions. Pricing services generally value fixed-income securities assuming orderly transactions of an institutional round lot size, but the Trust may hold or transact in such securities in smaller, odd lot sizes. Odd lots of securities in certain asset classes may trade at lower prices than institutional round lots, and the value ultimately realized when the securities are sold could differ from the prices used by the Trust. The amortized cost method of valuation may be used with respect to debt obligations with 60 days or less remaining to maturity unless such method does not represent fair value. Certain fixed-income investments including asset-backed and mortgage related securities may be valued based on valuation models that consider the estimated cash flows of each tranche of the issuer, establish a benchmark yield and develop an estimated tranche specific spread to the benchmark yield based on the unique attributes of the tranche.

Options, Futures, Swaps and Other Derivatives. Exchange-traded equity options (except ETF options, equity index options or those that are customized) for which market quotations are readily available are valued at the mean of the last bid and ask prices as quoted on the exchange or the board of trade on which such options are traded. In the event that there is no mean price available for an exchange traded equity option held by the Trust on a day on which the Trust values such option, the last bid (long positions) or ask (short positions) price, if available, will be used as the value of such option. If no bid or ask price is available on a day on which the Trust values such option, the prior day’s price will be used, unless the Advisor determines that such prior day’s price no longer reflects the fair value of the option in which case such option will be treated as a fair value asset. Customized exchange-traded equity options, ETF options, equity index options and OTC derivatives may be valued using a mathematical model which may incorporate a number of market data factors. Financial futures contracts and options thereon, which are traded on exchanges, are valued at their last sale price or settle price as of the close of such exchanges. Swap agreements and other derivatives are generally valued daily based upon quotations from market makers or by a pricing service in accordance with the Valuation Procedures.

Underlying Funds. Shares of underlying open-end funds (including money market funds) are valued at NAV. Shares of underlying exchange-traded closed-end funds and ETFs will be valued at their most recent closing price.

General Valuation Information. Prices obtained from independent third party pricing services, broker-dealers or market makers to value the Trust’s securities and other assets and liabilities are based on information available at the time the Trust values its assets and liabilities. In the event that a pricing service quotation is revised or updated subsequent to the day on which the Trust valued such security, the revised pricing service quotation generally will be applied prospectively. Such determination will be made considering pertinent facts and circumstances surrounding the revision.

In determining the market value of portfolio investments, the Trust may employ independent third party pricing services, which may use, without limitation, evaluated pricing methods that take into consideration market indexes, matrices, yield curves and other specified inputs and assumptions. This may result in the assets being valued at a price different from the price that would have been determined had the evaluated pricing method not been used. The price the Trust could receive upon the sale of any particular portfolio investment may differ from the Trust’s valuation of the investment, particularly for assets that trade in thin or volatile markets or that are valued using a fair valuation methodology or a price provided by an independent pricing service. As a result, the price received upon the sale of an investment may be less than the value ascribed by the Trust, and the Trust could realize a greater than expected loss or lesser than expected gain upon the sale of the investment. The Trust’s ability to value its investments may also be impacted by technological issues and/or errors by pricing services or other third party service providers.

In the event that application of the methods of valuation discussed above result in a price for a security which is deemed not to be representative of the fair market value of such security, the security will be valued by, under the direction of or in accordance with a method approved by the Advisor, the Trust’s valuation designee, as reflecting fair value. All other assets and liabilities (including securities for which market quotations are not readily available) held by the Trust (including restricted securities and private market investments, as applicable) are valued at fair value as determined in good faith by the Advisor pursuant to the Valuation Procedures. Any assets and liabilities which are denominated in a foreign currency are translated into U.S. dollars at the prevailing market rates.

Certain of the securities acquired by the Trust may be traded on foreign exchanges or OTC markets on days on which the Trust’s NAV is not calculated. In such cases, the NAV of the Trust’s common shares may be significantly affected on days when investors can neither purchase nor sell shares of the Trust.

Fair Value. When market quotations are not readily available or are believed by the Advisor to be unreliable, the Trust’s investments are valued at fair value (“Fair Value Assets”). Fair Value Assets are valued by the Advisor in accordance with the Valuation Procedures. Pursuant to Rule 2a-5 under the Investment Company Act, the Board has designated the Advisor as the valuation designee for the Trust. The Advisor may reasonably conclude that a market quotation is not readily available or is unreliable if, among other things, a security or other asset or liability does not have a price source due to its complete lack of trading, if the Advisor believes a market quotation from a broker-dealer or other source is unreliable (e.g., where it varies significantly from a recent trade, or no longer reflects the fair value of the security or other asset or liability subsequent to the most recent market quotation), or where the security or other asset or liability is only thinly traded or due to the occurrence of a significant event subsequent to the most recent market quotation. For this purpose, a “significant event” is deemed to occur if the Advisor determines, in its reasonable business judgment, that an event that has occurred after the close of trading for an asset or liability but prior to or at the time of pricing the Trust’s assets or liabilities, is likely to cause a material change to the last exchange closing price or closing market price of one or more assets held by, or liabilities of, the Trust. On any day the NYSE is open and a foreign market or the primary exchange on which a foreign asset or liability is traded is closed, such asset or liability will be valued using the prior day’s price, provided that the Advisor is not aware of any significant event or other information that would cause such price to no longer reflect the fair value of the asset or liability, in which case such asset or liability would be treated as a Fair Value Asset. For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of the Trust’s pricing time.

The Advisor’s Rule 2a-5 Committee is responsible for reviewing and approving methodologies by investment type and significant inputs used in the fair valuation of Trust assets or liabilities. In addition, the Trust’s accounting agent assists the Advisor by periodically endeavoring to confirm the prices it receives from all third party pricing services, index providers and broker-dealers. The Advisor regularly evaluates the values assigned to the securities and other assets and liabilities of the Trust.

When determining the price for a Fair Value Asset, the Advisor will seek to determine the price that the Trust might reasonably expect to receive from the current sale of that asset or liability in an arm’s-length transaction on the date on which the asset or liability is being valued, and does not seek to determine the price the Trust might reasonably expect to receive for selling an asset or liability at a later time or if it holds the asset or liability to maturity. Fair value determinations will be based upon all available factors that the Advisor deems relevant at the time of the determination, and may be based on analytical values determined by the Advisor using proprietary or third party valuation models.

Fair value represents a good faith approximation of the value of an asset or liability. When determining the fair value of an investment, one or more fair value methodologies may be used (depending on certain factors, including the asset type). For example, the investment may be initially priced based on the original cost of the investment or, alternatively, using proprietary or third-party models that may rely upon one or more unobservable inputs. Prices of actual, executed or historical transactions in the relevant investment (or comparable instruments) or, where appropriate, an appraisal by a third-party experienced in the valuation of similar instruments, may also be used as a basis for establishing the fair value of an investment.

The fair value of one or more assets or liabilities may not, in retrospect, be the price at which those assets or liabilities could have been sold during the period in which the particular fair values were used in determining the Trust’s NAV. As a result, the Trust’s sale or repurchase of its shares at NAV, at a time when a holding or holdings are valued at fair value, may have the effect of diluting or increasing the economic interest of existing shareholders.

The Trust’s annual audited financial statements, which are prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”), follow the requirements for valuation set forth in Financial Accounting Standards Board Accounting Standards Codification Topic 820, “Fair Value Measurements and Disclosures” (“ASC 820”), which defines and establishes a framework for measuring fair value under US GAAP and expands financial statement disclosure requirements relating to fair value measurements.

Generally, ASC 820 and other accounting rules applicable to funds and various assets in which they invest are evolving. Such changes may adversely affect the Trust. For example, the evolution of rules governing the determination of the fair market value of assets or liabilities to the extent such rules become more stringent would tend to increase the cost and/or reduce the availability of third-party determinations of fair market value. This may in turn increase the costs associated with selling assets or affect their liquidity due to the Trust’s inability to obtain a third-party determination of fair market value.

DISTRIBUTIONS

The Trust intends to make regular monthly cash distributions of all or a portion of its net investment income, after payment of dividends on the Trust’s VRDP Shares outstanding, to holders of the Trust’s common shares. Net capital gains, if any, will be distributed at least annually to holders of the Trust’s common shares. The Trust’s net investment income consists of all interest income accrued on portfolio assets less all expenses of the Trust. The Trust is required to allocate net capital gains and other taxable income, if any, received by the Trust among its shareholders on a pro rata basis in the year for which such capital gains and other income is realized.

The tax treatment and characterization of the Trust’s distributions may vary significantly from time to time because of the varied nature of the Trust’s investments. The ultimate tax characterization of the Trust’s distributions made in a fiscal year cannot finally be determined until after the end of that fiscal year. As a result, there is a possibility that the Trust may make total distributions during a fiscal year in an amount that exceeds the Trust’s earnings and profits for U.S. federal income tax purposes. In such situations, the amount by which the Trust’s total distributions exceed earnings and profits would generally be treated as a return of capital reducing the amount of a shareholder’s tax basis in such shareholder’s shares, with any amounts exceeding such basis treated as gain from the sale of shares.

The Trust currently intends to retain, until the final liquidating distribution, a portion of its net investment income, but continue to maintain its status as a RIC for federal income tax purposes. For federal income tax purposes, the Trust will be required to distribute substantially all of its net investment income for each tax year. The Trust expects that all or a portion of net capital gain, if any, will be distributed at least annually. The Trust will attempt to retain over time sufficient net investment income to cause the Trust’s net asset value on or about September 30, 2037 to be $25.00 per share, which may result in reductions in the distributions paid to common shareholders over the life of the Trust. Net asset value will fluctuate over time, but if the Trust does not incur any capital losses that are not offset, for federal income tax purposes, by capital gains, the Advisor anticipate that through the retention of net investment income, the Trust’s net asset value will be at least $25.00 per share on or about September 30, 2037.

Various factors will affect the level of the Trust’s income, including the asset mix, the amount of leverage utilized by the Trust and the effects thereof and the Trust’s use of hedging. To permit the Trust to maintain a more stable monthly distribution or to facilitate the Trust’s attempt to retain over time sufficient net investment income to cause the Trust’s net asset value to be at least $25.00 per share on or about September 30, 2037, the Trust may from time to time distribute less than the entire amount of tax-exempt interest income earned in a particular period. The undistributed tax-exempt interest income would be available to supplement future distributions. As a result, the distributions paid by the Trust for any particular monthly period may be more or less than the amount of tax-exempt interest income actually earned by the Trust during the period. Undistributed tax-exempt interest income will add to the Trust’s net asset value and, correspondingly, distributions from undistributed tax-exempt interest income will deduct from the Trust’s net asset value. The Trust’s income and distributions may decline over the term of the Trust as the dollar weighted average maturity of the Trust’s portfolio securities shorten. The likelihood of this risk may increase as the Trust approaches its term. The Trust expects that a final liquidating distribution will be made to shareholders on or before the termination of the Trust.

Shareholders will automatically have all dividends and distributions reinvested in common shares of the Trust issued by the Trust or purchased in the open market in accordance with the Trust’s dividend reinvestment plan unless an election is made to receive cash. However, some shareholders may buy shares through brokers that do not participate in the Trust’s dividend reinvestment plan. See “Dividend Reinvestment Plan.”

DIVIDEND REINVESTMENT PLAN

Please refer to the section of the Trust’s most recent annual report on Form N-CSR entitled “Automatic Dividend Reinvestment Plan”, which is incorporated by reference herein, for a discussion of the Trust’s dividend reinvestment plan.

RIGHTS OFFERINGS

The Trust may in the future, and at its discretion, choose to make offerings of rights to its shareholders to purchase common shares. Rights may be issued independently or together with any other offered security and may or may not be transferable by the person purchasing or receiving the rights. In connection with a rights offering to shareholders, we would distribute certificates or other documentation (i.e., rights cards distributed in lieu of certificates) evidencing the rights and a Prospectus Supplement to our shareholders as of the record date that we set for determining the shareholders eligible to receive rights in such rights offering. Any such future rights offering will be made in accordance with the Investment Company Act. [Under the Amended and Restated Agreement and Declaration of Trust, and subject to the Investment Company Act, the Board is authorized to approve rights offerings without obtaining shareholder approval.]

The staff of the SEC has interpreted the Investment Company Act as not requiring shareholder approval of a transferable rights offering to purchase common shares at a price below the then current NAV so long as certain conditions are met, including: (i) a good faith determination by a fund’s board that such offering would result in a net benefit to existing shareholders; (ii) the offering fully protects shareholders’ preemptive rights and does not discriminate among shareholders (except for the possible effect of not offering fractional rights); (iii) management uses its best efforts to ensure an adequate trading market in the rights for use by shareholders who do not exercise such rights; and (iv) the ratio of a transferable rights offering does not exceed one new share for each three rights held.

The applicable Prospectus Supplement would describe the following terms of the rights in respect of which this Prospectus is being delivered:

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the period of time the offering would remain open;

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the underwriter or distributor, if any, of the rights and any associated underwriting fees or discounts applicable to purchases of the rights;

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the title of such rights;

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the exercise price for such rights (or method of calculation thereof);

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the number of such rights issued in respect of each share;

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the number of rights required to purchase a single share;

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the extent to which such rights are transferable and the market on which they may be traded if they are transferable;

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if applicable, a discussion of the material U.S. federal income tax considerations applicable to the issuance or exercise of such rights;

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the date on which the right to exercise such rights will commence, and the date on which such right will expire (subject to any extension);

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the extent to which such rights include an over-subscription privilege with respect to unsubscribed securities and the terms of such over-subscription privilege; and

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termination rights we may have in connection with such rights offering.

A certain number of rights would entitle the holder of the right(s) to purchase for cash such number of common shares at such exercise price as in each case is set forth in, or be determinable as set forth in, the Prospectus Supplement relating to the rights offered thereby. Rights would be exercisable at any time up to the close of business on the expiration date for such rights set forth in the Prospectus Supplement. After the close of business on the expiration date, all unexercised rights would become void. Upon expiration of the rights offering and the receipt of payment and

the rights certificate or other appropriate documentation properly executed and completed and duly executed at the corporate trust office of the rights agent, or any other office indicated in the Prospectus Supplement, the common shares purchased as a result of such exercise will be issued as soon as practicable. To the extent permissible under applicable law, we may determine to offer any unsubscribed offered securities directly to persons other than shareholders, to or through agents, underwriters or dealers or through a combination of such methods, as set forth in the applicable Prospectus Supplement.

TAX MATTERS

[The following discussion is a brief summary of certain U.S. federal income tax considerations affecting the Trust and the purchase, ownership and disposition of the Trust’s common shares. A more detailed discussion of the tax rules applicable to the Trust and its common shareholders can be found in the SAI that is incorporated by reference into this prospectus. Except as otherwise noted, this discussion assumes the investor is a taxable U.S. holder (as defined below) and that the investor holds its common shares as capital assets for U.S. federal income tax purposes (generally, assets held for investment). This discussion is based upon current provisions of the Code, the regulations promulgated thereunder and judicial and administrative authorities, all of which are subject to change or differing interpretations by the courts or the IRS, possibly with retroactive effect. No attempt is made to present a detailed explanation of all U.S. federal tax concerns affecting the Trust and its common shareholders. The discussion set forth herein does not constitute tax advice and potential investors are urged to consult their own tax advisers to determine the specific U.S. federal, state, local and foreign tax consequences to them of investing in the Trust.

The Trust invests primarily in municipal securities the income of which is exempt from regular federal income tax. Consequently, the regular monthly dividends you receive will generally be exempt from regular federal income tax. A portion of these dividends, however, may be subject to the federal alternative minimum tax.

Although the Trust does not seek to realize taxable income or capital gains, the Trust may realize and distribute taxable income or capital gains from time to time as a result of the Trust’s normal investment activities. The Trust will distribute at least annually any taxable income or realized capital gains. Distributions of ordinary income and net short-term gains are taxable as ordinary income. Distributions of net long-term capital gains that are properly reported by the Trust are taxable to you as long-term capital gains regardless of how long you have owned your common shares. Dividends will not qualify for the dividends-received deduction generally available to corporate shareholders and will generally not qualify for the reduced rate on qualified dividend income.

Each year, you will receive a year-end statement reporting the amounts of tax-exempt dividends, capital gain dividends and ordinary income dividends paid to you during the preceding year, including the source of investment income by state and the portion of income that is subject to the federal alternative minimum tax. You will receive this statement from the firm where you purchased your common shares if you hold your investment in street name; the Trust will send you this statement if you hold your shares in registered form.

The tax status of your dividends is not affected by whether you reinvest your dividends or receive them in cash.

In order to avoid corporate taxation of its taxable income and be permitted to pay tax-exempt dividends, the Trust must elect to be treated as a RIC under Subchapter M of the Code and meet certain requirements that govern the Trust’s sources of income, diversification of assets and distribution of earnings to shareholders. Although the Trust intends to make such an election and meet these requirements, no assurance can be given it will meet such requirements. If the Trust failed to do so, the Trust would be required to pay corporate taxes on its taxable income, and all distributions (including distributions of tax-exempt interest income or long-term capital gains) would be taxable as ordinary dividends to the extent of the Trust’s earnings and profits.

In addition, even if the Trust qualifies as a RIC, in order for the Trust to pay tax-exempt dividends, at least 50% of the value of the Trust’s total assets must consist of tax-exempt obligations on a quarterly basis. Although the Trust intends to meet this requirement, no assurance can be given in this regard. If the Trust failed to do so, it would not be able to pay tax-exempt dividends, and your distributions attributable to interest received by the Trust from any source (including distributions of tax-exempt interest income) would be taxable as ordinary income to the extent of the Trust’s earnings and profits.

The Trust may be required to withhold taxes on certain of your dividends if you have not provided the Trust with your correct taxpayer identification number (if you are an individual, normally your Social Security number), or if you are otherwise subject to back-up withholding. If you receive Social Security benefits, you should be aware that tax-free income is taken into account in calculating the amount of these benefits that may be subject to federal income tax. If you borrow money to buy Trust shares, you may not be permitted to deduct the interest on that loan. Under federal income tax rules, Trust shares may be treated as having been bought with borrowed money even if the purchase of the Trust shares cannot be traced directly to borrowed money. Holders are urged to consult their own tax advisors regarding the impact of an investment in common shares upon the deductibility of interest payable by the holder.

State and Local Tax Matters

The exemption from federal income tax for exempt-interest dividends does not necessarily result in exemption for such dividends under the income or other tax laws of any state or local taxing authority. In some states, the portion of any exempt-interest dividend that is derived from interest received by a RIC on its holdings of that state’s securities and its political subdivisions and instrumentalities is exempt from that state’s income tax. Therefore, the Trust will report annually to its shareholders the percentage of interest income earned by the Trust during the preceding year on tax-exempt obligations indicating, on a state-by-state basis, the source of such income. Shareholders of the Trust are advised to consult with their own tax advisors about state and local tax matters.

Please refer to the SAI for more detailed information. You are urged to consult your tax adviser.

TAXATION OF HOLDERS OF RIGHTS

The value of a right will not be includible in the income of a common shareholder at the time the right is issued.

The basis of a right issued to a common shareholder will be zero, and the basis of the share with respect to which the subscription right was issued (the old share) will remain unchanged, unless either (a) the fair market value of the right on the date of distribution is at least 15% of the fair market value of the old share, or (b) such shareholder affirmatively elects (in the manner set out in Treasury regulations under the Code) to allocate to the subscription right a portion of the basis of the old share. If either (a) or (b) applies, then except as described below such shareholder must allocate basis between the old share and the right in proportion to their fair market values on the date of distribution.

The basis of a right purchased in the market will generally be its purchase price.

The holding period of a right issued to a common shareholder will include the holding period of the old share. No gain or loss will be recognized by a common shareholder upon the exercise of a right.

No loss will be recognized by a common shareholder if a right distributed to such common shareholder expires unexercised because the basis of the old share may be allocated to a right only if the right is exercised. If a right that has been purchased in the market expires unexercised, there will be a recognized loss equal to the basis of the right.

Any gain or loss on the sale of a right will be a capital gain or loss if the right is held as a capital asset (which in the case of rights issued to common shareholders will depend on whether the old share of common stock is held as a capital asset), and will be a long-term capital gain or loss if the holding period is deemed to exceed one year.]

CERTAIN PROVISIONS IN THE AMENDED AND RESTATED AGREEMENT AND DECLARATION OF TRUST AND THE AMENDED AND RESTATED BYLAWS

[The Amended and Restated Agreement and Declaration of Trust and the Amended and Restated Bylaws include provisions that could have the effect of limiting the ability of other entities or persons to acquire control of the Trust or to change the composition of the Board. This could have the effect of depriving shareholders of an opportunity to sell their shares at a premium over prevailing market prices by discouraging a third party from seeking to obtain control over the Trust. Such attempts could have the effect of increasing the expenses of the Trust and disrupting the normal operation of the Trust. Pursuant to the Amended and Restated Agreement and Declaration of Trust, the number of Trustees serving on the Board is determined by a majority of the Trustees, and if there are three or more Trustees, then the Board is divided into three classes. At each annual meeting of shareholders the term of only one class of Trustees expires and only the Trustees in that one class stand for re-election. Trustees standing for election at an annual meeting of shareholders are elected to serve until the third annual meeting of shareholders following their election and when their successors are duly elected and qualify. This provision could delay for up to two years the replacement of a majority of the Board. A Trustee may be removed from office with or without cause, and only by the action of a majority of the remaining Trustees or a vote of the holders of at least 75% of the shares then entitled to vote for the election of the respective Trustee.

In addition, the Trust’s Amended and Restated Agreement and Declaration of Trust requires the favorable vote of a majority of the Board followed by the favorable vote of the holders of at least 75% of the outstanding shares of each affected class or series of the Trust, voting separately as a class or series, to approve, adopt or authorize certain transactions when a Principal Shareholder (as further defined herein) is a party to the transaction, unless at least 80% of the Trustees have approved a memorandum of understanding with such Principal Shareholder, in which case “a majority of the outstanding voting securities” (as defined in the Investment Company Act) of the Trust shall be required. These voting requirements are in addition to any regulatory relief required from the SEC with respect to such transaction. For purposes of these provisions, “Principal Shareholder” refers to any person who, whether directly or indirectly and whether alone or together with its affiliates and associates, beneficially owns 5% or more of the outstanding shares of all outstanding classes or series of shares of beneficial interest of the Trust. The transactions subject to these special approval requirements are:

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the merger or consolidation of the Trust or any subsidiary of the Trust with or into any Principal Shareholder;

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the issuance of any securities of the Trust to any Principal Shareholder for cash (other than (x) pursuant to any automatic dividend reinvestment plan, (y) prior to the Trust’s initial public offering or (z) in connection with any public offering of the Trust’s securities);

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the sale, lease or exchange of all or any substantial part of the assets of the Trust to any Principal Shareholder, except assets having an aggregate fair market value of less than 2% of the total assets of the Trust, aggregating for the purpose of such computation all assets sold, leased or exchanged in any series of similar transactions within a twelve-month period; or

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the sale, lease or exchange to the Trust or any subsidiary of the Trust, in exchange for securities of the Trust, of any assets of any Principal Shareholder, except assets having an aggregate fair market value of less than 2% of the total assets of the Trust, aggregating for purposes of such computation all assets sold, leased or exchanged in any series of similar transactions within a twelve-month period.

Conversion of the Trust to an open-end investment company would require an amendment to the Trust’s Amended and Restated Agreement and Declaration of Trust, and which amendment would require the favorable vote of a majority of the Board followed by the favorable vote of the holders of at least 75% of the outstanding shares of each affected class or series of shares of the Trust, voting separately as a class or series, unless such conversion has been approved by at least 80% of the Trustees, in which case “a majority of the outstanding voting securities” (as defined in the Investment Company Act) of the Trust shall be required. The foregoing vote would satisfy a separate requirement in the Investment Company Act that any conversion of the Trust to an open-end investment company be approved by the shareholders. If approved in the foregoing manner, we anticipate conversion of the Trust to an open-end investment company might not occur until 90 days after the shareholders’ meeting at which such conversion was approved and would also require at least 10 days’ prior notice to all shareholders. In determining whether to propose

a conversion, the Board would consider all relevant facts and circumstances existing at the time, which may include, among other things, shareholder feedback, the composition of the Trust’s portfolio and economic and market conditions. Conversion of the Trust to an open-end investment company would require the redemption of any outstanding preferred shares, which could eliminate or alter the leveraged capital structure of the Trust with respect to the common shares. Following any such conversion, it is also possible that certain of the Trust’s investment policies and strategies would have to be modified to assure sufficient portfolio liquidity, including in order to comply with Rule 22e-4 under the Investment Company Act. In the event of conversion, the common shares would cease to be listed on the NYSE or other national securities exchanges or market systems. Shareholders of an open-end investment company may require the company to redeem their shares at any time, except in certain circumstances as authorized by or under the Investment Company Act, at their NAV, less such redemption charge, if any, as might be in effect at the time of a redemption. The Trust expects to pay all such redemption requests in cash, but reserves the right to pay redemption requests in a combination of cash or securities. If such partial payment in securities were made, investors may incur brokerage costs in converting such securities to cash. If the Trust were converted to an open-end fund, it is likely that new shares would be sold at NAV plus a sales load. The Board believes, however, that the closed-end structure is desirable in light of the Trust’s investment objectives and policies. Therefore, you should assume that it is not likely that the Board would vote to convert the Trust to an open-end fund.

To terminate the Trust prior to October 1, 2037, the Trust’s Amended and Restated Agreement and Declaration of Trust requires the favorable vote of at least 80% of Trustees. An extension of the Trust’s termination date beyond October 1, 2037 would require that a majority of the Trust’s Board and 75% of each class of outstanding shares voting as a separate class of the Trust approve an amendment to the Trust’s Amended and Restated Agreement and Declaration of Trust.

For the purposes of calculating “a majority of the outstanding voting securities” under the Trust’s Amended and Restated Agreement and Declaration of Trust, each class and series of the Trust shall vote together as a single class, except to the extent required by the Investment Company Act or the Trust’s Amended and Restated Agreement and Declaration of Trust with respect to any class or series of shares. If a separate vote is required, the applicable proportion of shares of the class or series, voting as a separate class or series, also will be required.

The Board has determined that provisions of the Amended and Restated Agreement and Declaration of Trust described above, with respect to the Board and the shareholder voting requirements, which voting requirements are greater than the minimum requirements under Maryland law or the Investment Company Act, are in the best interests of the shareholders generally. Reference should be made to the Amended and Restated Agreement and Declaration of Trust on file with the SEC for the full text of these provisions.

The Amended and Restated Agreement and Declaration of Trust also provides that the Trust may only merge or consolidate with another entity, or sell, lease, or exchange all or substantially all of the Trust’s property, upon the approval of two-thirds of the Trustees and approval of “a majority of the outstanding voting securities” (as defined in the Investment Company Act) of the Trust.

Pursuant to the terms of the Amended and Restated Agreement and Declaration of Trust, shareholders waive the right to a jury trial to the fullest extent permitted by law in connection with any suit, action or proceeding brought by or in the right of any shareholder or any person claiming any interest in any shares of the Trust seeking to enforce any provision of, or based on any matter arising out of, or in connection with, the Amended and Restated Agreement and Declaration of Trust, any series or class or any shares of the Trust including any claim of any nature against the Trust, any series or class or the Trustees or officers of the Trust. In addition, other than with respect to any suit, action or proceeding arising under the federal securities laws, any such suit, action or proceeding must be brought exclusively in the Circuit Court for Baltimore City, Maryland, or, if that court does not have jurisdiction, the United States District Court for the District of Maryland, Baltimore Division.

The Trust’s Amended and Restated Bylaws generally require that advance notice be given to the Trust in the event a shareholder desires to nominate a person for election to the Board or to transact any other business at an annual meeting of shareholders. Notice of any such nomination or business must be delivered to or received at the principal executive offices of the Trust not less than 120 calendar days nor more than 150 calendar days prior to the anniversary date of the prior year’s annual meeting (subject to certain exceptions). Any notice by a shareholder must be accompanied by

certain information and comply with other requirements as provided in the Amended and Restated Bylaws. Reference should be made to the Amended and Restated Bylaws on file with the SEC for the full text of these provisions.

The Trust’s governing documents provide that the Board, acting by a majority, has the exclusive power to amend or repeal the Amended and Restated Bylaws (except for any provision thereof specified not to be amended or repealed by the Board), subject to the requirements of the Investment Company Act and provided that no such amendment may render the Amended and Restated Bylaws in conflict with the Amended and Restated Agreement and Declaration of Trust.]

CLOSED-END FUND STRUCTURE

The Trust is a diversified, closed-end management investment company (commonly referred to as a closed-end fund). Closed-end funds differ from open-end funds (which are generally referred to as mutual funds) in that closed-end funds generally list their shares for trading on a stock exchange and do not redeem their shares at the request of the shareholder. This means that if you wish to sell your shares of a closed-end fund you must trade them on the stock exchange like any other stock at the prevailing market price at that time. In a mutual fund, if the shareholder wishes to sell shares of the fund, the mutual fund will redeem or buy back the shares at NAV. Also, mutual funds generally offer new shares on a continuous basis to new investors and closed-end funds generally do not. The continuous inflows and outflows of assets in a mutual fund can make it difficult to manage the fund’s investments. By comparison, closed-end funds are generally able to stay more fully invested in securities that are consistent with their investment objectives and also have greater flexibility to make certain types of investments and to use certain investment strategies, such as financial leverage and investments in illiquid securities.

Shares of closed-end funds frequently trade at a discount to their NAV. Because of this possibility and the recognition that any such discount may not be in the interest of shareholders, the Board might consider from time to time engaging in open-market repurchases, tender offers for shares or other programs intended to reduce the discount. We cannot guarantee or assure, however, that the Board will decide to engage in any of these actions. Nor is there any guarantee or assurance that such actions, if undertaken, would result in the shares trading at a price equal or close to the NAV. See “Repurchase of Common Shares” below and “Repurchase of Common Shares” in the SAI. The Board might also consider converting the Trust to an open-end mutual fund, which would also require a vote of the shareholders of the Trust.

REPURCHASE OF COMMON SHARES

Shares of closed-end investment companies often trade at a discount to their NAVs and the Trust’s common shares may also trade at a discount to their NAV, although it is possible that they may trade at a premium above NAV. The market price of the Trust’s common shares will be determined by such factors as relative demand for and supply of such common shares in the market, the Trust’s NAV, general market and economic conditions, market sentiment and other factors beyond the control of the Trust. See “Net Asset Value” and “Description of Shares—Common Shares.” Although the Trust’s common shareholders will not have the right to redeem their common shares, the Trust may take action to repurchase common shares in the open market or make tender offers for its common shares. This may have the effect of reducing any market discount from NAV.

There is no assurance that, if action is undertaken to repurchase or tender for common shares, such action will result in the common shares trading at a price which approximates their NAV. Although share repurchases and tender offers could have a favorable effect on the market price of the Trust’s common shares, you should be aware that the acquisition of common shares by the Trust will decrease the capital of the Trust and, therefore, may have the effect of increasing the Trust’s expense ratio and decreasing the asset coverage with respect to any borrowings or preferred shares outstanding. Any share repurchases or tender offers will be made in accordance with the requirements of the Exchange Act, the Investment Company Act and the principal stock exchange on which the common shares are traded. For additional information, see “Repurchase of Common Shares” in the SAI.

PLAN OF DISTRIBUTION

We may sell common shares, including to existing shareholders in a rights offering, through underwriters or dealers, directly to one or more purchasers (including existing shareholders in a rights offering), through agents, to or through

underwriters or dealers, or through a combination of any such methods of sale. The applicable Prospectus Supplement will identify any underwriter or agent involved in the offer and sale of our common shares, any sales loads, discounts, commissions, fees or other compensation paid to any underwriter, dealer or agent, the offering price, net proceeds and use of proceeds and the terms of any sale. In the case of a rights offering, the applicable Prospectus Supplement will set forth the number of our common shares issuable upon the exercise of each right and the other terms of such rights offering.

The distribution of our common shares may be effected from time to time in one or more transactions at a fixed price or prices, which may be changed, at prevailing market prices at the time of sale, at prices related to such prevailing market prices, or at negotiated prices. Sales of our common shares may be made in transactions that are deemed to be “at the market” as defined in Rule 415 under the Securities Act, including sales made directly on the NYSE or sales made to or through a market maker other than on an exchange.

We may sell our common shares directly to, and solicit offers from, institutional investors or others who may be deemed to be underwriters as defined in the Securities Act for any resales of the securities. In this case, no underwriters or agents would be involved. We may use electronic media, including the Internet, to sell offered securities directly.

In connection with the sale of our common shares, underwriters or agents may receive compensation from us in the form of discounts, concessions or commissions. Underwriters may sell our common shares to or through dealers, and such dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for whom they may act as agents. Underwriters, dealers and agents that participate in the distribution of our common shares may be deemed to be underwriters under the Securities Act, and any discounts and commissions they receive from us and any profit realized by them on the resale of our common shares may be deemed to be underwriting discounts and commissions under the Securities Act. Any such underwriter or agent will be identified and any such compensation received from us will be described in the applicable Prospectus Supplement. The maximum amount of compensation to be received by any Financial Industry Regulatory Authority member or independent broker-dealer will not exceed eight percent for the sale of any securities being offered pursuant to Rule 415 under the Securities Act. We will not pay any compensation to any underwriter or agent in the form of warrants, options, consulting or structuring fees or similar arrangements.

If a Prospectus Supplement so indicates, we may grant the underwriters an option to purchase additional common shares at the public offering price, less the underwriting discounts and commissions, within 45 days from the date of the Prospectus Supplement, to cover any over-allotments.

Under agreements into which we may enter, underwriters, dealers and agents who participate in the distribution of our common shares may be entitled to indemnification by us against certain liabilities, including liabilities under the Securities Act. Underwriters, dealers and agents may engage in transactions with us, or perform services for us, in the ordinary course of business.

If so indicated in the applicable Prospectus Supplement, we will ourselves, or will authorize underwriters or other persons acting as our agents to solicit offers by certain institutions to purchase our common shares from us pursuant to contracts providing for payment and delivery on a future date. Institutions with which such contacts may be made include commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and others, but in all cases such institutions must be approved by us. The obligation of any purchaser under any such contract will be subject to the condition that the purchase of the common shares shall not at the time of delivery be prohibited under the laws of the jurisdiction to which such purchaser is subject. The underwriters and such other agents will not have any responsibility in respect of the validity or performance of such contracts. Such contracts will be subject only to those conditions set forth in the Prospectus Supplement, and the Prospectus Supplement will set forth the commission payable for solicitation of such contracts.

To the extent permitted under the Investment Company Act and the rules and regulations promulgated thereunder, the underwriters may from time to time act as brokers or dealers and receive fees in connection with the execution of our portfolio transactions after the underwriters have ceased to be underwriters and, subject to certain restrictions, each may act as a broker while it is an underwriter.

A Prospectus and accompanying Prospectus Supplement in electronic form may be made available on the websites maintained by underwriters. The underwriters may agree to allocate a number of securities for sale to their online brokerage account holders. Such allocations of securities for Internet distributions will be made on the same basis as other allocations. In addition, securities may be sold by the underwriters to securities dealers who resell securities to online brokerage account holders.

In order to comply with the securities laws of certain states, if applicable, our common shares offered hereby will be sold in such jurisdictions only through registered or licensed brokers or dealers.

INCORPORATION BY REFERENCE

This Prospectus is part of a registration statement that we have filed with the SEC. We are allowed to “incorporate by reference” the information that we file with the SEC, which means that we can disclose important information to you by referring you to those documents. We incorporate by reference into this Prospectus the documents listed below and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, including any filings on or after the date of this Prospectus from the date of filing (excluding any information furnished, rather than filed), until we have sold all of the offered securities to which this Prospectus and any accompanying prospectus supplement relates or the offering is otherwise terminated. The information incorporated by reference is an important part of this Prospectus. Any statement in a document incorporated by reference into this Prospectus will be deemed to be automatically modified or superseded to the extent a statement contained in (1) this Prospectus or (2) any other subsequently filed document that is incorporated by reference into this Prospectus modifies or supersedes such statement. The documents incorporated by reference herein include:

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the Trust’s SAI, dated [●], 2026, filed with this Prospectus;

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the Trust’s annual report on Form N-CSR for the fiscal year ended December 31, 2025 filed with the SEC on March 5, 2025;

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the Trust’s Current Report on Form 8-K (other than information furnished rather than filed) filed with the SEC on January 21, 2025; and

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the description of the Trust’s common shares contained in the Trust’s Registration Statement on Form 8-A (File No. 001-41538) filed with the SEC on October 21, 2022, including any amendment or report filed for the purpose of updating such description prior to the termination of the offering registered hereby.

The Trust will provide without charge to each person, including any beneficial owner, to whom this Prospectus is delivered, upon written or oral request, a copy of any and all of the documents that have been or may be incorporated by reference in this Prospectus or the accompanying prospectus supplement. You should direct requests for documents by calling:

Client Services Desk

(800) 882-0052

The Trust makes available this Prospectus, SAI and the Trust’s annual and semi-annual reports, free of charge, at http://www.blackrock.com. You may also obtain this Prospectus, the SAI, other documents incorporated by reference and other information the Trust files electronically, including reports and proxy statements, on the SEC website (http://www.sec.gov) or with the payment of a duplication fee, by electronic request at [email protected]. Information contained in, or that can be accessed through, the Trust’s website is not incorporated by reference into this Prospectus and should not be considered to be part of this Prospectus or the accompanying prospectus supplement.

PRIVACY PRINCIPLES OF THE TRUST

The Trust is committed to maintaining the privacy of shareholders and to safeguarding their non-public personal information. The following information is provided to help you understand what personal information the Trust collects, how we protect that information, and why in certain cases we may share such information with select other parties.

The information in this Prospectus Supplement is not complete and may be changed. BlackRock 2037 Municipal Target Term Trust may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This Prospectus Supplement is not an offer to sell these securities and is not soliciting offers to buy these securities in any jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED [●], 2026

Filed Pursuant to Rule 424(b)([●])

Registration Statement No. 333-[●]

PROSPECTUS SUPPLEMENT

(To Prospectus dated [●], 2026)

BLACKROCK 2037 MUNICIPAL TARGET TERM TRUST

Up to [●] Common Shares of Beneficial Interest

BlackRock 2037 Municipal Target Term Trust (the “Trust,” “we,” “us” or “our”) is offering for sale [●] of our common shares of beneficial interest (“common shares”). Our common shares are listed on the New York Stock Exchange (“NYSE”) under the symbol “BMN.” As of the close of business on [●], 2026, the last reported net asset value per share of our common shares was $[●] and the last reported sale price per share of our common shares on the NYSE was $[●].

The Trust is a diversified, closed-end management investment company registered under the Investment Company Act of 1940, as amended (the “Investment Company Act”). The Trust’s investment objectives are to provide current income that is exempt from regular federal income tax (but which may be subject to the federal alternative minimum tax in certain circumstances) and to return $25.00 per common share (the initial public offering price per common share) to holders of common shares on or about September 30, 2037. The Trust’s investment adviser is BlackRock Advisors, LLC (the “Advisor”).

Sales of our common shares, if any, under this Prospectus Supplement and the accompanying Prospectus may be made in negotiated transactions or transactions that are deemed to be “at the market” as defined in Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”), including sales made directly on the NYSE or sales made to or through a market maker other than on an exchange.

Investing in the Trust’s common shares involves certain risks, including risks of leverage, that are described in the “Risks” section beginning on page 36 of the accompanying Prospectus.

NEITHER THE SECURITIES AND EXCHANGE COMMISSION (“SEC”) NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED THESE SECURITIES OR DETERMINED IF THIS PROSPECTUS SUPPLEMENT IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

[●], 2026

This Prospectus Supplement, together with the accompanying Prospectus, sets forth concisely the information about the Trust that a prospective investor should know before investing. You should read this Prospectus Supplement and the accompanying Prospectus, which contain important information, before deciding whether to invest in the common shares. You should retain the accompanying Prospectus and this Prospectus Supplement for future reference. A Statement of Additional Information (“SAI”), dated [●], 2026, containing additional information about the Trust, has been filed with the SEC and, as amended from time to time, is incorporated by reference in its entirety into this Prospectus Supplement and the accompanying Prospectus. This Prospectus Supplement, the accompanying Prospectus and the SAI are part of a “shelf” registration statement filed with the SEC. This Prospectus Supplement describes the specific details regarding this offering, including the method of distribution. If information in this Prospectus Supplement is inconsistent with the accompanying Prospectus or the SAI, you should rely on this Prospectus Supplement. You may call (800) 882-0052, visit the Trust’s website (http://www.blackrock.com) or write to the Trust to obtain, free of charge, copies of the SAI and the Trust’s semi-annual and annual reports, as well as to obtain other information about the Trust or to make shareholder inquiries. The SAI, as well as the Trust’s semi-annual and annual reports, are also available for free on the SEC’s website (http://www.sec.gov). You may also e-mail requests for these documents to [email protected]. Information contained in, or that can be accessed through, the Trust’s website is not part of this Prospectus Supplement or the accompanying Prospectus.

You should not construe the contents of this Prospectus Supplement and the accompanying Prospectus as legal, tax or financial advice. You should consult with your own professional advisors as to the legal, tax, financial or other matters relevant to the suitability of an investment in the Trust.

You should rely only on the information contained or incorporated by reference in this Prospectus Supplement and the accompanying Prospectus. Neither the Trust nor the underwriters have authorized anyone to provide you with different information. The Trust is not making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should not assume that the information contained in this Prospectus Supplement and the accompanying Prospectus is accurate as of any date other than the date of this Prospectus Supplement and the accompanying Prospectus, respectively. Our business, financial condition, results of operations and prospects may have changed since those dates. In this Prospectus Supplement and in the accompanying Prospectus, unless otherwise indicated, “Trust,” “us,” “our” and “we” refer to BlackRock 2037 Municipal Target Term Trust.

CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS

This Prospectus Supplement, the accompanying Prospectus and the SAI contain “forward-looking statements.” Forward-looking statements can be identified by the words “may,” “will,” “intend,” “expect,” “estimate,” “continue,” “plan,” “anticipate,” and similar terms and the negative of such terms. Such forward-looking statements may be contained in this Prospectus Supplement as well as in the accompanying Prospectus. By their nature, all forward-looking statements involve risks and uncertainties, and actual results could differ materially from those contemplated by the forward-looking statements. Several factors that could materially affect our actual results are the performance of the portfolio of securities we hold, the price at which our shares will trade in the public markets and other factors discussed in our periodic filings with the SEC.

Although we believe that the expectations expressed in our forward-looking statements are reasonable, actual results could differ materially from those projected or assumed in our forward-looking statements. Our future financial condition and results of operations, as well as any forward-looking statements, are subject to change and are subject to inherent risks and uncertainties, such as those disclosed in the “Risks” section of the accompanying Prospectus. All forward-looking statements contained or incorporated by reference in this Prospectus Supplement or the accompanying Prospectus are made as of the date of this Prospectus Supplement or the accompanying Prospectus, as the case may be. Except for our ongoing obligations under the federal securities laws, we do not intend, and we undertake no obligation, to update any forward-looking statement. The forward-looking statements contained in this Prospectus Supplement, the accompanying Prospectus and the SAI are excluded from the safe harbor protection provided by Section 27A of the Securities Act.

Currently known risk factors that could cause actual results to differ materially from our expectations include, but are not limited to, the factors described in the “Risks” section of the accompanying Prospectus. We urge you to carefully review that section for a more detailed discussion of the risks of an investment in our common shares.

S-1

PROSPECTUS SUPPLEMENT SUMMARY

The following summary is qualified in its entirety by reference to the more detailed information included elsewhere in this Prospectus Supplement and in the accompanying Prospectus and in the SAI.


The Trust		BlackRock 2037 Municipal Target Term Trust is a diversified, closed-end management investment company. The Trust’s investment objectives are to provide current income that is exempt from regular federal income tax (but which may be subject to the federal alternative minimum tax in certain circumstances) and to return $25.00 per common share (the initial public offering price per common share) to holders of common shares on or about September 30, 2037. The Trust is not intended as, and you should not construe it to be, a complete investment program. There can be no assurance that the Trust’s investment objectives, including to return $25.00 per common share to the holders of common shares on or about September 30, 2037, will be achieved or that the Trust’s investment program will be successful. The Trust’s common shares are listed for trading on the NYSE under the symbol “BMN.”
Investment Advisor		BlackRock Advisors, LLC acts as the Trust’s investment adviser. The Advisor receives an annual fee, payable monthly, in an amount equal to 0.55% of the average daily value of the Trust’s Managed Assets. “Managed Assets” means the total assets of the Trust (including any assets attributable to money borrowed for investment purposes) minus the sum of the Trust’s accrued liabilities (other than money borrowed for investment purposes).
The Offering		[The provisions of the Investment Company Act generally require that the public offering price of common shares (less any underwriting commissions and discounts) must equal or exceed the net asset value per share of a company’s common shares (calculated within 48 hours of pricing). Sales of our common shares, if any, under this Prospectus Supplement and the accompanying Prospectus may be made in negotiated transactions or transactions that are deemed to be “at the market” as defined in Rule 415 under the Securities Act, including sales made directly on the NYSE or sales made to or through a market maker other than on an exchange.]
Use of Proceeds		We currently anticipate that we will be able to invest all of the net proceeds of any sales of common shares pursuant to this Prospectus Supplement in accordance with our investment objectives and policies as described in the accompanying Prospectus under “The Trust’s Investments” within approximately three months of the receipt of such proceeds; however, the identification of appropriate investment opportunities pursuant to the Trust’s investment style or changes in market conditions could result in the Trust’s anticipated investment period extending to as long as six months. Pending such investment, it is anticipated that the proceeds will be primarily invested in short-term, tax-exempt or taxable investment grade securities. Depending on market conditions and operations, a portion of the cash held by the Trust, including any proceeds raised from the offering, may be used to pay distributions in accordance with the Trust’s distribution policy and may be a return of capital.

S-2

SUMMARY OF TRUST EXPENSES

The following table and example are intended to assist you in understanding the various costs and expenses directly or indirectly associated with investing in our common shares.


Shareholder Transaction Expenses
Sales load paid by you (as a percentage of offering price)⁽¹⁾		[●] %
Offering expenses borne by the Trust (as a percentage of offering price)⁽¹⁾		[●] %
Dividend reinvestment plan fees		$[●] per share for open-market purchases of common shares⁽²⁾
Dividend reinvestment plan sale transaction fee		$[●] ⁽²⁾
Estimated Annual Expenses (as a percentage of net assets attributable to common shares)
Management Aees ⁽³⁾⁽⁴⁾		[●] %
Other Expenses⁽⁵⁾		[●] %
Miscellaneous Other Expenses		[●]%
Interest Expense⁽⁶⁾		[●]%
Total Annual Expenses		[●] %
Fee Waivers and/or Expense Reimbursements⁽⁴⁾		([●]) %
Total Annual Expenses After Fee Waivers and/or Expense Reimbursements⁽⁴⁾		[●] %

(1)	Trust shareholders will pay all offering expenses involved with this offering.

(2)

(3)

(4)

The Trust and the Advisor have entered into a fee waiver agreement (the “Fee Waiver Agreement”), pursuant to which the Advisor has contractually agreed to waive the management fee with respect to any portion of the Trust’s assets attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds managed by the Advisor or its affiliates and other exchange-traded products sponsored by the Advisor or its affiliates, in each case that have a contractual management fee, through June 30, [2027]. In addition, pursuant to the Fee Waiver Agreement, the Advisor has contractually agreed to waive its management fees by the amount of investment advisory fees the Trust pays to the Advisor indirectly through its investment in money market funds managed by the Advisor or its affiliates, through June 30, [2027]. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Trust (upon the vote of a majority of the Trustees who are not “interested persons” (as defined in the Investment Company Act) of the Trust or a majority of the outstanding voting securities of the Trust), upon 90 days’ written notice by the Trust to the Advisor.

(5)	[Other expenses are based on estimated amounts for the current fiscal year.]

(6)	Reflects leverage in the form of [_____]. The interest expense borne by the Trust will vary over time in accordance with the level of the Trust’s use of leverage and variations in market interest rates. Interest expense is required to be treated as an expense of the Trust for accounting purposes.

S-4

Example

The following example illustrates the expenses (including the sales load of $[●] and offering costs of $[●]) that you would pay on a $1,000 investment in common shares, assuming (i) the Fee Waiver Agreement described above is only in effect for the first year, since it expires on June 30, [2027], and (ii) a 5% annual return:

1 Year

3 Years

5 Years

10 Years

Total expenses incurred

[●]

The example should not be considered a representation of future expenses. The example assumes that the estimated “Other Expenses” set forth in the Estimated Annual Expenses table are accurate, that the rate listed under Total Annual Expenses remains the same each year and that all dividends and distributions are reinvested at net asset value. Actual expenses may be greater or less than those assumed. Moreover, the Trust’s actual rate of return may be greater or less than the hypothetical 5% return shown in the example.

USE OF PROCEEDS

We estimate the total net proceeds of the offering to be $[●], based on the public offering price of $[●] per share and after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

The net proceeds from the issuance of common shares hereunder will be invested in accordance with the Trust’s investment objectives and policies as set forth in this Prospectus Supplement and the accompanying Prospectus. We currently anticipate that we will be able to invest all of the net proceeds in accordance with our investment objectives and policies within approximately three months of the receipt of such proceeds; however, the identification of appropriate investment opportunities pursuant to the Trust’s investment style or changes in market conditions could result in the Trust’s anticipated investment period extending to as long as six months. Pending such investment, it is anticipated that the proceeds will be primarily invested in short-term, tax-exempt or taxable investment grade securities. Depending on market conditions and operations, a portion of the cash held by the Trust, including any proceeds raised from the offering, may be used to pay distributions in accordance with the Trust’s distribution policy and may be a return of capital. A return of capital is a return to investors of a portion of their original investment in the Trust. In general terms, a return of capital would involve a situation in which a Trust distribution (or a portion thereof) represents a return of a portion of a shareholder’s investment in the Trust, rather than making a distribution that is funded from the Trust’s earned income or other profits. Although return of capital distributions may not be currently taxable, such distributions would decrease the basis of a shareholder’s shares, and therefore, may increase a shareholder’s tax liability for capital gains upon a sale of shares, even if sold at a loss to the shareholder’s original investments.

CAPITALIZATION

The following table sets forth the unaudited capitalization of the Trust as of [●], 2026 and its adjusted capitalization assuming the common shares available in the offering discussed in this Prospectus Supplement had been issued.

[To be provided.]

PLAN OF DISTRIBUTION

[To be provided.]

LEGAL MATTERS

Willkie Farr & Gallagher LLP, New York, New York, serves as counsel to the Trust. Certain legal matters in connection with the common shares will be passed upon for the Trust by [●].

S-5

SUBJECT TO COMPLETION, DATED [●], 2026

Filed Pursuant to Rule 424(b)([●])

Registration Statement No. 333-[●]

PROSPECTUS SUPPLEMENT

(To Prospectus dated [●], 2026)

BLACKROCK 2037 MUNICIPAL TARGET TERM TRUST

[●] Rights for [●] Common Shares of Beneficial Interest

Issuable Upon the Exercise of

Transferable Subscription Rights to Acquire Common Shares of Beneficial Interest

BlackRock 2037 Municipal Target Term Trust (the “Trust,” “we,” “us” or “our”) is issuing transferable subscription rights (the “Rights”) to our common shareholders (the “Common Shareholders”) to subscribe for an aggregate of [●] common shares of beneficial interest (each, a “Common Share” and collectively, the “Common Shares”).

The Trust is a diversified, closed-end management investment company. The Trust’s investment objectives are to provide current income that is exempt from regular federal income tax (but which may be subject to the federal alternative minimum tax in certain circumstances) and to return $25.00 per common share (the initial public offering price per common share) to holders of common shares on or about September 30, 2037. The Trust’s investment adviser is BlackRock Advisors, LLC (the “Advisor”).

The Common Shares are listed on the New York Stock Exchange (“NYSE”) under the symbol “BMN.” Common Shareholders of record on [●], 2026 (the “Record Date”) will receive [●] Right for each Common Share held. These Rights are transferable and will allow the holders thereof to purchase additional Common Shares. The Rights will be listed for trading on the [●] under the symbol “[●]” during the course of the Rights offering.

The Rights entitle their holders to purchase [●] new Common Share for every [●] Rights held. Any Common Shareholder who owns fewer than [●] Common Shares as of the close of business on the Record Date may subscribe for [●] full Common Share. Common Shareholders as of the close of business on the Record Date who fully exercise all Rights initially issued to them (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share) will be entitled to subscribe for additional Common Shares that remain unsubscribed as a result of any unexercised Rights. This over-subscription privilege is subject to a number of limitations and subject to allotment.

The subscription price per Common Share (the “Subscription Price”) will be determined based upon a formula equal to [●]% of the average of the last reported sales price of a Common Share on the NYSE on the date on which the Rights offering expires, as such date may be extended from time to time, and each of the [● (●)] preceding trading days (the “Formula Price”). If, however, the Formula Price is less than [●]% of the net asset value (“NAV”) per Common Share at the close of trading on the NYSE on the Expiration Date (as defined below), then the Subscription Price will be [●]% of the Trust’s NAV per Common Share at the close of trading on the NYSE on the Expiration Date. All offering expenses, including sales commissions, will be borne by the Advisor, and not the Trust or any Common Shareholders. The Rights offering will expire at 5:00 p.m., Eastern time, on [●], 2026, unless extended as described in this Prospectus Supplement (the “Expiration Date”).

This Prospectus Supplement, together with the accompanying Prospectus, sets forth concisely the information about the Trust that a prospective investor should know before investing. You should read this Prospectus Supplement and the accompanying Prospectus, which contain important information, before deciding whether to invest in the Common Shares. You should retain the accompanying Prospectus and this Prospectus Supplement for future reference. A Statement of Additional Information (“SAI”), dated [●], 2026, containing additional information about the Trust, has been filed with the Securities and Exchange Commission (“SEC”) and, as amended from time to time, is incorporated by reference in its entirety into this Prospectus Supplement and the accompanying Prospectus. This Prospectus Supplement, the accompanying Prospectus and the SAI are part of a “shelf” registration statement filed with the SEC. This Prospectus Supplement describes the specific details regarding this offering, including the method of distribution. If information in this Prospectus Supplement is inconsistent with the accompanying Prospectus or the SAI, you should rely on this Prospectus Supplement. You may call (800) 882-0052, visit the Trust’s website (http://www.blackrock.com) or write to the Trust to obtain, free of charge, copies of the SAI and the Trust’s semi-annual and annual reports, as well as to obtain other information about the Trust or to make shareholder inquiries. The SAI, as well as the Trust’s semi-annual and annual reports, are also available for free on the SEC’s website (http://www.sec.gov). You may also e-mail requests for these documents to [email protected]. Information contained in, or that can be accessed through, the Trust’s website is not part of this Prospectus Supplement or the accompanying Prospectus. Common Shareholders please call toll-free at [●] (banks and brokers please call [•]) or please send written requests to [●].

Investing in Common Shares through Rights involves certain risks, including risks of leverage, that are described in the “Special Characteristics and Risks of the Rights Offering” section of this Prospectus Supplement.

SHAREHOLDERS WHO DO NOT FULLY EXERCISE THEIR RIGHTS MAY, AT THE COMPLETION OF THE RIGHTS OFFERING, OWN A SMALLER PROPORTIONAL INTEREST IN THE TRUST THAN IF THEY EXERCISED THEIR RIGHTS. AS A RESULT OF THE RIGHTS OFFERING YOU MAY EXPERIENCE SUBSTANTIAL DILUTION OF THE AGGREGATE NET ASSET VALUE OF YOUR COMMON SHARES DEPENDING UPON WHETHER THE TRUST’S NET ASSET VALUE PER COMMON SHARE IS ABOVE OR BELOW THE SUBSCRIPTION PRICE ON THE EXPIRATION DATE. RIGHTS EXERCISED BY A SHAREHOLDER ARE IRREVOCABLE.

THE TRUST HAS DECLARED MONTHLY DISTRIBUTIONS PAYABLE ON [●], 2026 WITH A RECORD DATE OF [●], 2026. ANY COMMON SHARES ISSUED AS A RESULT OF THE RIGHTS OFFERING WILL NOT BE RECORD DATE SHARES FOR THE TRUST’S MONTHLY DISTRIBUTION TO BE PAID ON [●], AND WILL NOT BE ENTITLED TO RECEIVE SUCH DISTRIBUTION.


	Per Common Share			Total (1)
Estimated Subscription Price of Common Shares to shareholders exercising Rights⁽²⁾	$	[	•]	$	[	•]
Underwriting discounts and commissions	$	[	•]	$	[	•]
Estimated proceeds, before expenses, to the Trust⁽³⁾⁽⁴⁾	$	[	•]	$	[	•]

(1)	Assumes that all Rights are exercised at the estimated Subscription Price (as described below). All of the Rights may not be exercised, and the estimated Subscription Price may be higher or lower than the actual Subscription Price.

(2)	The estimated Subscription Price to the public is based upon [●]% of the last reported sales price of the Trust’s Common Shares on the NYSE on [●], 2026 and each of the [● (●)] preceding trading days. See “Terms of the Rights Offering—Subscription Price.”

(3)

Before deduction of expenses related to the Rights offering, which are estimated approximately at $[●]. Any offering expenses are paid indirectly by shareholders. Such fees and expenses will immediately reduce the net asset value per share of each Common Share purchased by an investor in the Rights offering. The indirect expenses of the offering that shareholders will pay are estimated to be $[●] in the aggregate and $[●] per share. The amount of proceeds to the Trust net of any fees and expenses of the offering are estimated to be $[●] in the aggregate and $[●] per share. Shareholders will not directly bear any offering expenses.

TABLE OF CONTENTS

Prospectus Supplement


CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS			R-1
SUMMARY OF THE TERMS OF THE RIGHTS OFFERING			R-3
DESCRIPTION OF THE RIGHTS OFFERING			R-6
SUMMARY OF TRUST EXPENSES			R-16
USE OF PROCEEDS			R-17
CAPITALIZATION			R-17
SPECIAL CHARACTERISTICS AND RISKS OF THE RIGHTS OFFERING			R-17
TAXATION			R-19
PLAN OF DISTRIBUTION			R-20
LEGAL MATTERS			R-22
FINANCIAL STATEMENTS			R-23
ADDITIONAL INFORMATION			R-23

Prospectus


PROSPECTUS SUMMARY			1
SUMMARY OF TRUST EXPENSES			6
FINANCIAL HIGHLIGHTS			8
SENIOR SECURITIES			10
USE OF PROCEEDS			11
THE TRUST			11
DESCRIPTION OF SHARES			11
THE TRUST’S INVESTMENTS			15
LEVERAGE			30
RISKS			36
HOW THE TRUST MANAGES RISKS			49
MANAGEMENT OF THE TRUST			49
NET ASSET VALUE			53
DISTRIBUTIONS			57
DIVIDEND REINVESTMENT PLAN			57
RIGHTS OFFERINGS			59
TAX MATTERS			60
TAXATION OF HOLDERS OF RIGHTS			61
CERTAIN PROVISIONS IN THE AMENDED AND RESTATED AGREEMENT AND DECLARATION OF TRUST AND BYLAWS			63
CLOSED-END FUND STRUCTURE			65
REPURCHASE OF COMMON SHARES			65
PLAN OF DISTRIBUTION			65
INCORPORATION BY REFERENCE			67
PRIVACY PRINCIPLES OF THE TRUST			67

You should rely only on the information contained or incorporated by reference in this Prospectus Supplement and the accompanying Prospectus. The Trust has not authorized anyone to provide you with different information. The Trust is not making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should not assume that the information contained in this Prospectus Supplement and the accompanying Prospectus is accurate as of any date other than the date of this Prospectus Supplement and the accompanying Prospectus, respectively. This Prospectus Supplement will be amended to reflect material changes to the information contained herein and will be delivered to shareholders. Our business, financial condition, results of operations and prospects may have changed since those dates. In this Prospectus Supplement and in the accompanying Prospectus, unless otherwise indicated, “Trust,” “us,” “our” and “we” refer to BlackRock 2037 Municipal Target Term Trust, a Maryland statutory trust.

CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS

This Prospectus Supplement, the accompanying Prospectus and the SAI contain “forward-looking statements.” Forward-looking statements can be identified by the words “may,” “will,” “intend,” “expect,” “estimate,” “continue,” “plan,” “anticipate,” and similar terms and the negative of such terms. Such forward-looking statements may be contained in this Prospectus Supplement as well as in the accompanying Prospectus and in the SAI. By their nature, all forward-looking statements involve risks and uncertainties, and actual results could differ materially from those contemplated by the forward-looking statements. Several factors that could materially affect our actual results are the performance of the portfolio of securities we hold, the price at which our shares will trade in the public markets and other factors discussed in our periodic filings with the SEC.

Although we believe that the expectations expressed in our forward-looking statements are reasonable, actual results could differ materially from those projected or assumed in our forward-looking statements. Our future financial condition and results of operations, as well as any forward-looking statements, are subject to change and are subject to inherent risks and uncertainties, such as those disclosed in the “Risks” section of the accompanying Prospectus and “Special Characteristics and Risks of the Rights Offering” in this Prospectus Supplement. All forward-looking statements contained or incorporated by reference in this Prospectus Supplement or the accompanying Prospectus, or in the SAI, are made as of the date of this Prospectus Supplement or the accompanying Prospectus or SAI, as the case may be. Except for our ongoing obligations under the federal securities laws, we do not intend, and we undertake no obligation, to update any forward-looking statement. The forward-looking statements contained in this Prospectus Supplement, the accompanying Prospectus and the SAI are excluded from the safe harbor protection provided by Section 27A of the Securities Act of 1933, as amended (the “Securities Act”).

Currently known risk factors that could cause actual results to differ materially from our expectations include, but are not limited to, the factors described in the “Risks” section of the accompanying Prospectus as well as in the “Special Characteristics and Risks of the Rights Offering” section of this Prospectus Supplement. We urge you to carefully review those sections for a more detailed discussion of the risks of an investment in the Common Shares.

R-1

SUMMARY OF THE TERMS OF THE RIGHTS OFFERING


Purpose of the Rights Offering		[To come.]

Terms of the Rights Offering		[●] transferable subscription right (a “Right”) will be issued for each common share of the Trust (each, a “Common Share,” and collectively, the “Common Shares”) held on the Record Date (as defined below). Rights are expected to trade on the [●] under the symbol “[●].” The Rights will allow Common Shareholders to subscribe for new Common Shares of the Trust. [●] Common Shares of the Trust are outstanding as of [●], 2026. [●] Rights will be required to purchase one Common Share. Shares of the Trust, as a closed-end fund, can trade at a discount to net asset value (“NAV”). Upon exercise of the Rights offering, Trust shares are expected to be issued at a price below NAV per Common Share. [An over-subscription privilege will be offered, [subject to the right of the Board of Trustees of the Trust (the “Board”) to eliminate the over-subscription privilege.]] [●] Common Shares of the Trust will be issued if all Rights are exercised. See “Terms of the Rights Offering.” The Trust has declared monthly distributions payable on [●], 2026 with a record date of [●], 2026. Any Common Shares issued as a result of the Rights offering will not be record date shares for the Trust’s monthly distribution to be paid on [●], 2026 and will not be entitled to receive such distribution. The exercise of Rights by a Rights holder is irrevocable.

Title		Subscription Rights to Acquire Common Shares of Beneficial Interest

Subscription Price		The final subscription price per Common Share (the “Subscription Price”) will be determined based upon a formula equal to [●]% of the average of the last reported sales price of the Trust’s Common Shares on the New York Stock Exchange (“NYSE”) on the Expiration Date (as defined below) and each of the [●] preceding trading days (the “Formula Price”). If, however, the Formula Price is less than [●]% of the NAV per Common Share of the Trust’s Common Shares at the close of trading on the NYSE on the Expiration Date, then the Subscription Price will be [●]% of the Trust’s NAV per Common Share at the close of trading on the NYSE on that day. See “Terms of the Rights Offering.”

Record Date		Rights will be issued to Common Shareholders of record as of the close of business on [●], 2026 (the “Record Date”). See “Terms of the Rights Offering.”

Number of Rights Issued		[●] Right will be issued in respect of each Common Share of the Trust outstanding as of the close of business on the Record Date. See “Terms of the Rights Offering.”

Number of Rights Required to Purchase One Common Share		A holder of Rights may purchase [●] Common Share of the Trust for every [●] Rights exercised. The number of Rights to be issued to a shareholder as of the close of business on the Record Date will be rounded up to the nearest number of Rights evenly divisible by [●]. See “Terms of the Rights Offering.”

R-3



Over-Subscription Privilege		Common Shareholders as of the close of business on the Record Date (“Record Date Shareholders”) who fully exercise all Rights initially issued to them (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share) generally are entitled, subject to the limitations described herein, to buy those Common Shares, referred to as “primary over-subscription shares,” that were not purchased by other Rights holders at the same Subscription Price. If enough primary over-subscription shares are available, all such requests will be honored in full. If the requests for primary over-subscription shares exceed the primary over-subscription shares available, the available primary over-subscription shares will be allocated pro rata among those fully exercising Record Date Shareholders who over-subscribe based on the number of Rights originally issued to them by the Trust. Common Shares acquired pursuant to the primary over-subscription privilege are subject to allotment. Holders of Rights acquired in the secondary market may not participate in the primary over-subscription privilege.

		[In addition, the Trust, in its sole discretion, may determine to issue additional Common Shares at the same Subscription Price in an amount of up to [●]% of the shares issued pursuant to the primary subscription, referred to as “secondary over-subscription shares.” Should the Trust determine to issue some or all of the secondary over-subscription shares, they will be allocated only among Record Date Shareholders who submitted over-subscription requests. Secondary over-subscription shares will be allocated pro rata among those fully exercising Record Date Shareholders who over-subscribe based on the number of Rights originally issued to them by the Trust. Rights acquired in the secondary market may not participate in the secondary over-subscription privilege.]

		Notwithstanding the above, the Board has the right in its absolute discretion to eliminate the primary over-subscription privilege and/or secondary over-subscription privilege (together, the “over-subscription privilege”) if it considers it to be in the best interest of the Trust to do so. The Board may make that determination at any time, without prior notice to Rights holders or others, up to and including the fifth day following the Expiration Date (as defined below). See “Over-Subscription Privilege.”

		Any Common Shares issued pursuant to the over-subscription privilege will be shares registered under the Prospectus.

Transfer of Rights		[The Rights will be transferable. See “Terms of the Rights Offering,” “Sale of Rights” and “Method of Transferring Rights.”]

Subscription Period		The Rights may be exercised at any time after issuance and prior to expiration of the Rights (the “Subscription Period”), which will be [5:00 PM Eastern Time] on [●], 2026 (the “Expiration Date”), unless otherwise extended. See “Terms of the Rights Offering” and “Method of Exercise of Rights.” The Rights offering may be terminated [or extended] by the Trust at any time for any reason before the Expiration Date. If the Trust terminates the Rights offering, the Trust will issue a press release announcing such termination and will direct the Subscription Agent (defined below) to return, without interest, all subscription proceeds received to such shareholders who had elected to purchase Common Shares.

Distribution Arrangements		[●]

Offering Expenses		The expenses of the Rights offering are expected to be approximately $[●] and will be borne by holders of the Trust’s Common Shares. See “Use of Proceeds.”

R-4



Sale of Rights		The Rights are transferable until the completion of the Subscription Period and will be admitted for trading on the [●] under the symbol “[●]”. Although no assurance can be given that a market for the Rights will develop, trading in the Rights on the [●] is expected to begin two Business Days prior to the Record Date and may be conducted until the close of trading on the last [●] trading day prior to the Expiration Date. For purposes of this Prospectus Supplement, a “Business Day” shall mean any day on which trading is conducted on the [●].

		The value of the Rights, if any, will be reflected by their market price on the [●]. Rights may be sold by individual holders through their broker or financial advisor or may be submitted to the Subscription Agent (defined below) for sale. Any Rights submitted to the Subscription Agent for sale must be received by the Subscription Agent prior to [5:00 PM, Eastern Time], on or before [●], 2026, [●] Business Days prior to the Expiration Date (or, if the Subscription Period is extended, prior to [5:00 PM, Eastern Time], on the [●] Business Day prior to the extended Expiration Date).

		Rights that are sold will not confer any right to acquire any Common Shares in any over-subscription, and any Record Date Shareholder who sells any Rights will not be eligible to participate in the over-subscription privilege, if any.

		Trading of the Rights on the [●] will be conducted on a when-issued basis until and including the date on which the Subscription Certificates (as defined below) are mailed to Record Date Shareholders of record and thereafter will be conducted on a regular-way basis until and including the last [●] trading day prior to the completion of the Subscription Period. The shares are expected to begin trading ex-Rights one Business Day prior to the Record Date.

		If the Subscription Agent receives Rights for sale in a timely manner, the Subscription Agent will use its best efforts to sell the Rights on the [●]. The Subscription Agent will also attempt to sell any Rights attributable to shareholders of record whose addresses are outside the United States, or who have an APO or FPO address. See “Foreign Restrictions.” The Subscription Agent will attempt to sell such Rights, including by first offering such Rights to the Dealer Manager (defined below) for purchase by the Dealer Manager at the then-current market price on the [●]. The Subscription Agent will offer Rights to the Dealer Manager before attempting to sell them on the [●].

		Any commissions will be paid by the selling Rights holders. Neither the Trust nor the Subscription Agent will be responsible if Rights cannot be sold and neither has guaranteed any minimum sales price for the Rights. If the Rights can be sold, sales of these Rights will be deemed to have been effected at the weighted average price received by the Subscription Agent on the day such Rights are sold, less any applicable brokerage commissions, taxes and other expenses (i.e., costs incidental to the sale of Rights).

		For a discussion of actions that may be taken by [●] (the “Dealer Manager”) to seek to facilitate the trading market for Rights and the placement of Common Shares pursuant to the exercise of Rights, including the purchase of Rights and the sale during the Subscription Period by the Dealer Manager of Common Shares acquired through the exercise of Rights and the terms on which such sales will be made, see “Plan of Distribution.”

		Shareholders are urged to obtain a recent trading price for the Rights on the [●] from their broker, bank, financial advisor or the financial press.

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		Banks, broker-dealers and trust companies that hold shares for the accounts of others are advised to notify those persons that purchase Rights in the secondary market that such Rights will not participate in any over-subscription privilege. See “Terms of the Rights Offering.”

Use of Proceeds		The Trust estimates the net proceeds of the Rights offering to be approximately $[●]. This figure is based on the Subscription Price per Common Share of $[●] ([●]% of the last reported sales price of the Trust’s Common Shares on the NYSE on [●], 2026 and each of the [●(●)] preceding trading days) and assumes all new Common Shares offered are sold and that the expenses related to the Rights offering estimated at approximately $[●] are paid.

		The Advisor anticipates that investment of the proceeds will be made in accordance with the Trust’s investment objectives and policies as appropriate investment opportunities are identified, which is expected to be substantially completed in approximately three months; however, the identification of appropriate investment opportunities pursuant to the Trust’s investment style or changes in market conditions may cause the investment period to extend as long as six months. Pending such investment, the proceeds will be held in short-term, tax-exempt or taxable investment grade securities. Depending on market conditions and operations, a portion of the cash held by the Trust, including any proceeds raised from the offering, may be used to pay distributions in accordance with the Trust’s distribution policy and may be a return of capital. A return of capital is a return to investors of a portion of their original investment in the Trust. In general terms, a return of capital would involve a situation in which a Trust distribution (or a portion thereof) represents a return of a portion of a shareholder’s investment in the Trust, rather than making a distribution that is funded from the Trust’s earned income or other profits. Although return of capital distributions may not be currently taxable, such distributions would decrease the basis of a shareholder’s shares, and therefore, may increase a shareholder’s tax liability for capital gains upon a sale of shares, even if sold at a loss to the shareholder’s original investments. See “Use of Proceeds.”

Taxation/ERISA		See “Taxation” and “Employee Benefit Plan and IRA Considerations.”

Subscription Agent		[●]. See “Subscription Agent.”

Information Agent		[●]. See “Information Agent.”

DESCRIPTION OF THE RIGHTS OFFERING

Terms of the Rights Offering

The Trust is issuing to Record Date Shareholders Rights to subscribe for Common Shares of the Trust. Each Record Date Shareholder is being issued one transferable Right for each Common Share owned on the Record Date. The Rights entitle the holder to acquire, at a subscription price per Common Share (the “Subscription Price”) determined based upon a formula equal to [●]% of the average of the last reported sales price of the Trust’s Common Shares on the NYSE on the Expiration Date (as defined below) and each of the [●] preceding trading days (the “Formula Price”), [●] new Common Share for each [●] Rights held. If, however, the Formula Price is less than [●]% of the NAV per share of the Trust’s Common Shares at the close of trading on the NYSE on the Expiration Date, then the Subscription Price will be [●]% of the Trust’s NAV per Common Share at the close of trading on the NYSE on that day.

The estimated Subscription Price to the public of $[●] is based upon [●]% of the last reported sales price of the Trust’s Common Shares on the NYSE on [●], 2026. Fractional shares will not be issued upon the exercise of the Rights. Accordingly, Common Shares may be purchased only pursuant to the exercise of Rights in integral multiples of [●]. The number of Rights to be issued to a Record Date Shareholder will be rounded up to the nearest number of Rights evenly divisible by [●]. In the case of Common Shares held of record by Cede & Co. (“Cede”), as nominee for the

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Depository Trust Company (“DTC”), or any other depository or nominee, the number of Rights issued to Cede or such other depository or nominee will be adjusted to permit rounding up (to the nearest number of Rights evenly divisible by [●]) of the Rights to be received by beneficial owners for whom it is the holder of record only if [insert nominee name] or such other depository or nominee provides to the Trust on or before the close of business on [●], 2026 written representation of the number of Rights required for such rounding. Rights may be exercised at any time during the period (the “Subscription Period”) which commences on [●], 2026, and ends at [5:00 PM Eastern Time] on [●], 2026 (the “Expiration Date”), unless otherwise extended. Shares of the Trust, as a closed-end fund, can trade at a discount to NAV. Upon exercise of the Rights offering, Trust shares may be issued at a price below NAV per Common Share. The right to acquire one Common Share for each [●] Rights held during the Subscription Period (or any extension of the Subscription Period) at the Subscription Price will be referred to in the remainder of this Prospectus Supplement as the “Rights offering.” Rights will expire on the Expiration Date and thereafter may not be exercised. The Trust has declared monthly distributions payable on [●], 2026 with a record date of [●], 2026. Any Common Shares issued as a result of the Rights offering will not be Record Date shares for the Trust’s monthly distribution to be paid on [●], 2026 and will not be entitled to receive such distribution.

The Trust has entered into a dealer manager agreement with [●] (the “Dealer Manager”) that allows the Dealer Manager to take actions to seek to facilitate the trading market for Rights and the placement of Common Shares pursuant to the exercise of Rights. Those actions are expected to involve the Dealer Manager purchasing and exercising Rights during the Subscription Period at prices determined at the time of such exercise, which are expected to vary from the Subscription Price. See “Plan of Distribution” for additional information.

Rights may be evidenced by subscription certificates or may be uncertificated and evidenced by other appropriate documentation (i.e., a rights card distributed to registered shareholders in lieu of a subscription certificate) (“Subscription Certificates”). The number of Rights issued to each holder will be stated on the Subscription Certificate delivered to the holder. The method by which Rights may be exercised and Common Shares paid for is set forth below in “Method of Exercise of Rights,” “Payment for Shares” and “Plan of Distribution.” A holder of Rights will have no right to rescind a purchase after [●] (the “Subscription Agent”) has received payment. See “Payment for Shares” below. It is anticipated that the Common Shares issued pursuant to an exercise of Rights will be listed on the [●].

[Holders of Rights [who are Record Date Shareholders] are entitled to subscribe for additional Common Shares at the same Subscription Price pursuant to the over-subscription privilege, subject to certain limitations, allotment and the right of the Board to eliminate the primary over-subscription privilege [or secondary] over-subscription privilege. See “Over-Subscription Privilege” below.]

For purposes of determining the maximum number of Common Shares that may be acquired pursuant to the Rights offering, broker-dealers, trust companies, banks or others whose shares are held of record by Cede or by any other depository or nominee will be deemed to be the holders of the Rights that are held by Cede or such other depository or nominee on their behalf.

The Rights are transferable until the completion of the Subscription Period and will be admitted for trading on the [●] under the symbol “[●].” Assuming a market exists for the Rights, the Rights may be purchased and sold through usual brokerage channels and also sold through the Subscription Agent. Although no assurance can be given that a market for the Rights will develop, trading in the Rights on the [●] is expected to begin two Business Days prior to the Record Date and may be conducted until the close of trading on the last [●] trading day prior to the Expiration Date. Trading of the Rights on the [●] is expected to be conducted on a when-issued basis until and including the date on which the Subscription Certificates are mailed to Record Date Shareholders of record and thereafter is expected to be conducted on a regular way basis until and including the last [●] trading day prior to the Expiration Date. The method by which Rights may be transferred is set forth below under “Method of Transferring Rights.” The Common Shares are expected to begin trading ex-Rights one Business Day prior to the Record Date as determined and announced by the [●]. The Rights offering may be terminated or extended by the Trust at any time for any reason before the Expiration Date. If the Trust terminates the Rights offering, the Trust will issue a press release announcing such termination and will direct the Subscription Agent to return, without interest, all subscription proceeds received to such shareholders who had elected to purchase Common Shares.

Nominees who hold the Trust’s Common Shares for the account of others, such as banks, broker-dealers, trustees or depositories for securities, should notify the respective beneficial owners of such shares as soon as possible to ascertain

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such beneficial owners’ intentions and to obtain instructions with respect to the Rights. If the beneficial owner so instructs, the nominee should complete the Subscription Certificate and submit it to the Subscription Agent with proper payment. In addition, beneficial owners of the Common Shares or Rights held through such a nominee should contact the nominee and request the nominee to effect transactions in accordance with such beneficial owner’s instructions.

[Participants in the Trust’s Dividend Reinvestment Plan (the “Plan”) will be issued Rights in respect of the Common Shares held in their accounts in the Plan. Participants wishing to exercise these Rights must exercise the Rights in accordance with the procedures set forth in “Method of Exercise of Rights” and “Payment for Shares.”]

Conditions of the Rights Offering

The Rights offering is being made in accordance with the Investment Company Act of 1940, as amended (the “Investment Company Act”) without shareholder approval. The staff of the SEC has interpreted the Investment Company Act as not requiring shareholder approval of a transferable rights offering to purchase common shares at a price below the then current NAV so long as certain conditions are met, including: (i) a good faith determination by a fund’s board that such offering would result in a net benefit to existing shareholders; (ii) the offering fully protects shareholders’ preemptive rights and does not discriminate among shareholders (except for the possible effect of not offering fractional rights); (iii) management uses its best efforts to ensure an adequate trading market in the rights for use by shareholders who do not exercise such rights; and (iv) the ratio of a transferable rights offering does not exceed one new share for each three rights held.

Important Dates to Remember

[Please note that the dates in the table below may change if the Rights offering is extended.]


Event		Date
Record Date		[●], 2026
Subscription Period		[●], 2026 through [●], 2026†
Final Date Rights Will Trade		[●], 2026
Expiration Date*		[●], 2026†
Payment for Common Shares and Subscription Certificate or Notice of Guaranteed Delivery Due*		[●], 2026†
Issuance Date		[●], 2026†
Confirmation Date		[●], 2026†

*	A shareholder exercising Rights must deliver to the Subscription Agent by [5:00 PM Eastern Time] on [●], 2026 (unless the Rights offering is extended) either (a) a Subscription Certificate and payment for Common Shares or (b) a notice of guaranteed delivery and payment for Common Shares.

†	Unless the Rights offering is extended.

[Over-Subscription Privilege

Rights holders [who are Record Date Shareholders and who fully exercise all Rights initially issued to them (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share)] are entitled to subscribe for additional Common Shares at the same Subscription Price pursuant to the over-subscription privilege, subject to certain limitations and subject to allotment. The Board has the right in its absolute discretion to eliminate the over-subscription privilege with respect to primary over-subscription shares and secondary over-subscription shares if it considers it to be in the best interest of the Trust to do so. The Board may make that determination at any time, without prior notice to Rights holders or others, up to and including the fifth day following the Expiration Date. If the primary over-subscription privilege is not eliminated, it will operate as set forth below.

[Record Date Shareholders who fully exercise all Rights initially issued to them (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share)] are entitled to buy those Common Shares, referred to as “primary over-subscription shares,” that were not purchased by other holders of Rights

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at the same Subscription Price. If enough primary over-subscription shares are available, all such requests will be honored in full. If the requests for primary over-subscription shares exceed the primary over-subscription shares available, the available primary over-subscription shares will be allocated pro rata among those fully exercising [Record Date Shareholders] who over-subscribe based on the number of Rights originally issued to them by the Trust. Common Shares acquired pursuant to the over-subscription privilege are subject to allotment.

[In addition, the Trust, in its sole discretion, may determine to issue additional Common Shares at the same Subscription Price in an amount of up to [●]% of the shares issued pursuant to the primary subscription, referred to as “secondary over-subscription shares.” Should the Trust determine to issue some or all of the secondary over-subscription shares, they will be allocated only among Record Date Shareholders who submitted over-subscription requests. Secondary over-subscription shares will be allocated pro rata among those fully exercising Record Date Shareholders who over-subscribe based on the number of Rights originally issued to them by the Trust. Holders of Rights acquired in the secondary market may not participate in the over-subscription privilege. In the event that the Subscription Price is lower than the Trust’s NAV per share, any secondary over-subscription shares issued by the Trust will not result in the ratio of the Rights offering exceeding one new share for each three Rights.]

Record Date Shareholders who are fully exercising their Rights during the Subscription Period should indicate, on the Subscription Certificate that they submit with respect to the exercise of the Rights issued to them, how many Common Shares they are willing to acquire pursuant to the over-subscription privilege.

To the extent sufficient Common Shares are not available to fulfill all over-subscription requests, unsubscribed Common Shares (the “Excess Shares”) will be allocated pro rata among those Record Date Shareholders who over-subscribe based on the number of Rights issued to them by the Trust. The allocation process may involve a series of allocations in order to assure that the total number of Common Shares available for over-subscriptions is distributed on a pro rata basis.

The formula to be used in allocating the Excess Shares is as follows:


Shareholder’s Record Date Position	X	Excess Shares Remaining
Total Record Date Position of All Over-Subscribers	X

Banks, broker-dealers, trustees and other nominee holders of Rights will be required to certify to the Subscription Agent, before any over-subscription privilege may be exercised with respect to any particular beneficial owner, as to the aggregate number of Rights exercised during the Subscription Period and the number of Common Shares subscribed for pursuant to the over-subscription privilege by such beneficial owner and that such beneficial owner’s subscription was exercised in full. [Nominees should also notify holders purchasing Rights in the secondary market that such Rights may not participate in the over-subscription privilege.]

The Trust will not otherwise offer or sell any Common Shares that are not subscribed for pursuant to the primary subscription, the primary over-subscription privilege or the secondary over-subscription privilege pursuant to the Rights offering.]

[Dealer Manager

[●] (previously defined as the “Dealer Manager”), a registered broker-dealer, may also act on behalf of its clients to purchase or sell Rights in the open market and may receive commissions from its clients for such services. Holders of Rights attempting to sell any unexercised Rights in the open market through a broker-dealer other than the Dealer Manager may be charged a different commission and should consider the commissions and fees charged by the broker-dealer prior to selling their Rights on the open market. The Dealer Manager is not expected to purchase Rights as principal for its own account in order to seek to facilitate the trading market for Rights or otherwise. See “Plan of Distribution” for additional information.]

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Sale of Rights

The Rights are transferable and will be admitted for trading on the [●] under the symbol “[●].” Although no assurance can be given that a market for the Rights will develop, trading in the Rights on the [●] is expected to begin two Business Days prior to the Record Date and may be conducted until the close of trading on the last [●] trading day prior to the Expiration Date.

The value of the Rights, if any, will be reflected by the market price. Rights may be sold by individual holders through their broker or other financial intermediary. Holders of Rights attempting to sell any unexercised Rights in the open market through their broker or financial advisor may be charged a commission or incur other transaction expenses and should consider the commissions and fees charged prior to selling their Rights on the open market.

[Rights that are sold will not confer any right to acquire any Common Shares in any primary over-subscription privilege or secondary over-subscription privilege, if any, and any Record Date Shareholder who sells any Rights will not be eligible to participate in the primary over-subscription privilege or secondary over-subscription privilege, if any.]

Trading of the Rights on the [●] will be conducted on a when-issued basis until and including the date on which the Subscription Certificates are mailed to Record Date Shareholders of record and thereafter will be conducted on a regular-way basis until and including the last [●] trading day prior to the Expiration Date. The Common Shares are expected to begin trading ex-Rights one Business Day prior to the Record Date.

Shareholders are urged to obtain a recent trading price for the Rights on the [●] from their broker, bank, financial advisor or the financial press.

Holders of Rights who are unable or do not wish to exercise any or all of their Rights may contact the Subscription Agent to facilitate the sale of any unexercised Rights. The Subscription Agent will contact the Dealer Manager or other brokers in order to assist Rights holders whose Rights are not currently held at a broker-dealer or other applicable financial intermediary to facilitate the sale of the Rights. Shareholders of record whose addresses are outside the United States, or who have an APO or FPO address, are encouraged to contact the Subscription Agent to facilitate the sale of their Rights if they are otherwise unable or unwilling to exercise the Rights. The selling Rights holder will pay all applicable brokerage commissions incurred. There can be no assurance that the Subscription Agent will be able to facilitate the sale of any of Rights and neither the Trust nor the Subscription Agent has guaranteed any minimum sales price for the Rights.

Method of Transferring Rights

The Rights evidenced by a single Subscription Certificate may be transferred in whole by endorsing the Subscription Certificate for transfer in accordance with the accompanying instructions. A portion of the Rights evidenced by a single Subscription Certificate (but not fractional Rights) may be transferred by delivering to the Subscription Agent a Subscription Certificate properly endorsed for transfer, with instructions to register the portion of the Rights evidenced thereby in the name of the transferee (and to issue a new Subscription Certificate to the transferee evidencing the transferred Rights). In this event, a new Subscription Certificate evidencing the balance of the Rights will be issued to the Rights holder or, if the Rights holder so instructs, to an additional transferee.

Holders wishing to transfer all or a portion of their Rights (but not fractional Rights) should promptly transfer such Rights to ensure that: (i) the transfer instructions will be received and processed by the Subscription Agent, (ii) a new Subscription Certificate will be issued and transmitted to the transferee or transferees with respect to transferred Rights, and to the holder with respect to retained Rights, if any, and (iii) the Rights evidenced by the new Subscription Certificates may be exercised or sold by the recipients thereof prior to the Expiration Date. Neither the Trust nor the Subscription Agent shall have any liability to a transferee or holder of Rights if Subscription Certificates are not received in time for exercise or sale prior to the Expiration Date.

Except for the fees charged by the Subscription Agent (which will be paid by the Trust as described below), all commissions, fees and other expenses (including brokerage commissions and transfer taxes) incurred in connection

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with the purchase, sale, transfer or exercise of Rights will be for the account of the holder of the Rights, and none of these commissions, fees or expenses will be borne by the Trust or the Subscription Agent.

The Trust anticipates that the Rights will be eligible for transfer through, and that the exercise of the Rights may be effected through, the facilities of [insert depository] (Rights exercised through [insert depository] are referred to as “[insert depository] Exercised Rights”).

Subscription Agent

The Subscription Agent is [●]. The Subscription Agent will receive from the Trust an amount estimated to be $[●], comprised of the fee for its services and the reimbursement for certain expenses related to the Rights offering. The shareholders of the Trust will indirectly pay such amount.

Information Agent

INQUIRIES BY ALL HOLDERS OF RIGHTS SHOULD BE DIRECTED TO: THE INFORMATION AGENT, [●]; HOLDERS PLEASE CALL TOLL-FREE AT [●]; BANKS AND BROKERS PLEASE CALL [●].

Method of Exercise of Rights

Rights may be exercised by completing and signing the Subscription Certificate and delivering the completed and signed Subscription Certificate to the Subscription Agent, together with payment for the Common Shares as described below under “Payment for Shares.” Rights may also be exercised through the broker of a holder of Rights, who may charge the holder of Rights a servicing fee in connection with such exercise. See “Plan of Distribution” for additional information regarding the purchase and exercise of Rights by the Dealer Manager.

Completed Subscription Certificates and payment must be received by the Subscription Agent prior to [5:00 PM Eastern Time], on the Expiration Date (unless payment is effected by means of a notice of guaranteed delivery as described below under “Payment for Shares”). Your broker, bank, trust company or other intermediary may impose a deadline for exercising Rights earlier than [5:00 PM, Eastern Time], on the Expiration Date. The Subscription Certificate and payment should be delivered to the Subscription Agent at the following address:

If By Mail:

BlackRock 2037 Municipal Target Term Trust

[●]

If By Overnight Courier:

BlackRock 2037 Municipal Target Term Trust

[●]

Payment for Shares

Holders of Rights who acquire Common Shares in the Rights offering may choose between the following methods of payment:

(1)

A holder of Rights can send the Subscription Certificate, together with payment in the form of a check (which must include the name of the shareholder on the check) for the Common Shares subscribed for in the Rights offering and, if eligible, for any additional Common Shares subscribed for pursuant to the over-subscription privilege, to the Subscription Agent based on the Subscription Price. To be accepted, the payment, together with the executed Subscription Certificate, must be received by the Subscription Agent at one of the addresses noted above prior to [5:00 PM Eastern Time] on the Expiration Date. The Subscription Agent will deposit

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all share purchase checks received by it prior to the final due date into a segregated account pending proration and distribution of Common Shares. The Subscription Agent will not accept cash as a means of payment for Common Shares.

(2)

Alternatively, a subscription will be accepted by the Subscription Agent if, prior to [5:00 PM Eastern Time] on the Expiration Date, the Subscription Agent has received a written notice of guaranteed delivery by mail or email from a bank, trust company, or a NYSE member, guaranteeing delivery of a properly completed and executed Subscription Certificate. In order for the notice of guarantee to be valid, full payment for the Common Shares at the Subscription Price must be received with the notice. The Subscription Agent will not honor a notice of guaranteed delivery unless a properly completed and executed Subscription Certificate is received by the Subscription Agent by the close of business on the [second] Business Day after the Expiration Date. The notice of guaranteed delivery must be emailed to the Subscription Agent at [●] or delivered to the Subscription Agent at one of the addresses noted above.

A PAYMENT PURSUANT TO THIS METHOD MUST BE IN UNITED STATES DOLLARS BY CHECK (WHICH MUST INCLUDE THE NAME OF THE SHAREHOLDER ON THE CHECK) DRAWN ON A BANK LOCATED IN THE CONTINENTAL UNITED STATES, MUST BE PAYABLE TO BLACKROCK 2037 MUNICIPAL TARGET TERM TRUST AND MUST ACCOMPANY AN EXECUTED SUBSCRIPTION CERTIFICATE TO BE ACCEPTED.

The method and timing of payment for Common Shares acquired by the Dealer Manager through the exercise of Rights is described under “Plan of Distribution.”

If a holder of Rights who acquires Common Shares pursuant to the subscription makes payment of an insufficient amount, the Trust reserves the right to take any or all of the following actions: (i) reallocate such subscribed and unpaid-for Common Shares to Record Date Shareholders exercising the over-subscription privilege who did not receive the full over-subscription requested; (ii) apply any payment actually received by it toward the purchase of the greatest whole number of Common Shares which could be acquired by such holder upon exercise of the Rights or any over-subscription privilege; and (iii) exercise any and all other rights or remedies to which it may be entitled, including, without limitation, the right to set off against payments actually received by it with respect to such subscribed Common Shares (in other words, retain such payments) and to enforce the exercising Rights holder’s relevant payment obligation.

Any payment required from a holder of Rights must be received by the Subscription Agent prior to [5:00 PM Eastern Time] on the Expiration Date. Issuance and delivery of the Common Shares purchased are subject to collection of checks.

Within [●] Business Days following the Expiration Date (the “Confirmation Date”), a confirmation will be sent by the Subscription Agent to each holder of Rights (or, if the Common Shares are held by [insert nominee name] or any other depository or nominee, to [insert nominee name] or such other depository or nominee), showing (i) the number of Common Shares acquired pursuant to the subscription, (ii) the number of Common Shares, if any, acquired pursuant to the over-subscription privilege, and (iii) the per share and total purchase price for the Common Shares. Any payment required from a holder of Rights must be received by the Subscription Agent on or prior to the Expiration Date. Any excess payment to be refunded by the Trust to a holder of Rights, or to be paid to a holder of Rights as a result of sales of Rights on its behalf by the Subscription Agent, will be mailed by the Subscription Agent to the holder within [●] Business Days after the Expiration Date.

A holder of Rights will have no right to rescind a purchase after the Subscription Agent has received payment either by means of a notice of guaranteed delivery or a check, which must include the name of the shareholder on the check.

Upon acceptance of a subscription, all funds received by the Subscription Agent shall be held by the Subscription Agent as agent for the Trust and deposited in one or more bank accounts. Such funds may be invested by the Subscription Agent in: bank accounts, short-term certificates of deposit, bank repurchase agreements, and disbursement accounts with commercial banks meeting certain standards. The Subscription Agent may receive interest, dividends or other earnings in connection with such deposits or investments.

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Holders, such as broker-dealers, trustees or depositories for securities, who hold Common Shares for the account of others, should notify the respective beneficial owners of the Common Shares as soon as possible to ascertain such beneficial owners’ intentions and to obtain instructions with respect to the Rights. If the beneficial owner so instructs, the record holder of the Rights should complete Subscription Certificates and submit them to the Subscription Agent with the proper payment. In addition, beneficial owners of Common Shares or Rights held through such a holder should contact the holder and request that the holder effect transactions in accordance with the beneficial owner’s instructions.[Banks, broker-dealers, trustees and other nominee holders that hold Common Shares of the Trust for the accounts of others are advised to notify those persons that purchase Rights in the secondary market that such Rights may not participate in any over-subscription privilege offered.]

THE INSTRUCTIONS ACCOMPANYING THE SUBSCRIPTION CERTIFICATES SHOULD BE READ CAREFULLY AND FOLLOWED IN DETAIL. DO NOT SEND SUBSCRIPTION CERTIFICATES TO THE TRUST.

THE METHOD OF DELIVERY OF SUBSCRIPTION CERTIFICATES AND PAYMENT OF THE SUBSCRIPTION PRICE TO THE SUBSCRIPTION AGENT WILL BE AT THE ELECTION AND RISK OF THE RIGHTS HOLDERS, BUT IF SENT BY MAIL IT IS RECOMMENDED THAT THE CERTIFICATES AND PAYMENTS BE SENT BY REGISTERED MAIL, PROPERLY INSURED, WITH RETURN RECEIPT REQUESTED, AND THAT A SUFFICIENT NUMBER OF DAYS BE ALLOWED TO ENSURE DELIVERY TO THE SUBSCRIPTION AGENT AND CLEARANCE OF PAYMENT PRIOR TO [5:00 PM EASTERN TIME], ON THE EXPIRATION DATE BECAUSE UNCERTIFIED PERSONAL CHECKS MAY TAKE AT LEAST FIVE BUSINESS DAYS TO CLEAR.

All questions concerning the timeliness, validity, form and eligibility of any exercise of Rights will be determined by the Trust, whose determinations will be final and binding. The Trust in its sole discretion may waive any defect or irregularity, or permit a defect or irregularity to be corrected within such time as it may determine, or reject the purported exercise of any Right. Subscriptions will not be deemed to have been received or accepted until all irregularities have been waived or cured within such time as the Trust determines in its sole discretion. Neither the Trust nor the Subscription Agent will be under any duty to give notification of any defect or irregularity in connection with the submission of Subscription Certificates or incur any liability for failure to give such notification.

Foreign Restrictions

Offering documents, including Subscription Certificates, will not be mailed to Record Date Shareholders whose addresses are outside the United States (for these purposes, the United States includes the District of Columbia and the territories and possessions of the United States) or who have an APO or FPO address (the “Foreign Shareholders”) if such mailing cannot be made into the non-U.S. jurisdiction without additional registration and incurring other expense that the Board has determined is not in the best interest of the Trust and its shareholders. In such cases, unless determined to be not in the best interest of the Trust and its shareholders in accordance with the previous sentence, the Subscription Agent will send a letter via regular mail to Foreign Shareholders who own Common Shares directly (“Direct Foreign Shareholders”), as opposed to in “street name” with a broker or other financial intermediary, to notify them of the Rights offering. Direct Foreign Shareholders who wish to exercise their Rights should contact the Information Agent, as described above under “Information Agent,” to facilitate the exercise of such Rights and for instructions or any other special requirements that may apply in order for such Direct Foreign Shareholder to exercise its Rights. Direct Foreign Shareholders who wish to sell their Rights should contact the Subscription Agent and follow the procedures described above under “Sale of Rights.” Direct Foreign Shareholders are encouraged to contact the Trust or the Subscription Agent as far in advance of the Expiration Date as possible to ensure adequate time for their Rights to be exercised or sold. Foreign Shareholders who own Common Shares in “street name” through a broker or other financial intermediary should contact such broker or other financial intermediary with respect to any exercise or sale of Rights.

Employee Benefit Plan and IRA Considerations

Holders of Rights that are employee benefit plans subject to limitations imposed by the Internal Revenue Code of 1986, as amended (the “Code”), such as employee plans subject to the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), Keogh Plans and Individual Retirement Accounts (“IRA”) (each a “Benefit Plan” and

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collectively, “Benefit Plans”), should be aware that the use of additional contributions of cash outside of the Benefit Plan to exercise Rights may be treated as additional contributions to the Benefit Plan. When taken together with contributions previously made, such deemed additional contributions may be in excess of tax limitations and subject the Rights holder to excise taxes for excess or nondeductible contributions. In the case of Benefit Plans qualified under Section 401(a) of the Code, additional contributions could cause the maximum contribution limitations of Section 415 of the Code or other qualification rules to be violated. Benefit Plans contemplating making additional contributions to exercise Rights should consult with their legal and tax counsel prior to making such contributions.

Benefit Plans and other tax exempt entities, including governmental plans, should also be aware that if they borrow to finance their exercise of Rights, they may become subject to the tax on unrelated business taxable income (“UBTI”) under Section 511 of the Code. If any portion of an IRA is used as security for a loan, the portion so used may also be treated as distributed to the IRA depositor.

A Benefit Plan may also be subject to laws, such as ERISA, that impose certain requirements on the Benefit Plan and on those persons who are fiduciaries with respect to the Benefit Plans. Such requirements may include prudence and diversification requirements and require that investments be made in accordance with the documents governing the fiduciary. The exercise of Rights by a fiduciary for a Benefit Plan should be considered in light of such fiduciary requirements.

In addition, ERISA and the Code prohibit certain transactions involving the assets of a Benefit Plan and certain persons (referred to as “parties in interest” for purposes of ERISA and “disqualified persons” for purposes of the Code) having certain relationships to such Benefit Plans, unless a statutory or administrative exemption is applicable to the transaction. A party in interest or disqualified person who engages in a nonexempt prohibited transaction may be subject to excise taxes and other penalties and liabilities under ERISA and the Code (or with respect to certain Benefit Plans, such as IRAs, a prohibited transaction may cause the Benefit Plan to lose its tax-exempt status). In this regard, the U.S. Department of Labor has issued prohibited transaction class exemptions (“PTCEs”) that may apply to the exercise of the Rights and holding of the Common Shares. These class exemptions include, without limitation, PTCE 84-14 respecting transactions determined by independent qualified professional asset managers, PTCE 90-1 respecting insurance company pooled separate accounts, PTCE 91-38 respecting bank collective investment funds, PTCE 95-60 respecting life insurance company general accounts and PTCE 96-23 respecting transactions determined by in-house asset managers, PTCE 84-24 governing purchases of shares in investment companies) and PTCE 75-1 respecting sales of securities. In addition, Section 408(b)(17) of ERISA and Section 4975(d)(20) of the Code each provides a limited exemption, commonly referred to as the “service provider exemption,” from the prohibited transaction provisions of ERISA and Section 4975 of the Code for certain transactions between a Benefit Plan and a person that is a party in interest and/or a disqualified person (other than a fiduciary or an affiliate that, directly or indirectly, has or exercises any discretionary authority or control or renders any investment advice with respect to the assets of any Benefit Plan involved in the transaction) solely by reason of providing services to the Benefit Plan or by relationship to a service provider, provided that the Benefit Plan receives no less, nor pays no more, than adequate consideration. There can be no assurance that all of the conditions of any such exemptions or any other exemption will be satisfied at the time that the Rights are exercised, or thereafter while the Common Shares are held, if the facts relied upon for utilizing a prohibited transaction exemption change.

Due to the complexity of these rules and the penalties for noncompliance, fiduciaries of Benefit Plans should consult with their legal and tax counsel regarding the consequences of their exercise of Rights under ERISA, the Code and other similar laws.

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SUMMARY OF TRUST EXPENSES

The following table and example are intended to assist you in understanding the various costs and expenses directly or indirectly associated with investing in our Common Shares as a percentage of net assets attributable to Common Shares. Amounts are for the current fiscal year after giving effect to anticipated net proceeds of the Rights offering.


Shareholder Transaction Expenses
Sales load paid by you (as a percentage of offering price) ⁽¹⁾		[●]%
Offering expenses borne by the Trust (as a percentage of offering price) ⁽¹⁾		[●]%
Dividend reinvestment plan fees		$[●] per share for open- market purchases of common shares⁽²⁾
Dividend reinvestment plan sale transaction fee		[●]%⁽²⁾
Estimated Annual Expenses (as a percentage of net assets attributable to common shares)
Management Fees⁽³⁾⁽⁴⁾		[●]%
Other Expenses⁽⁵⁾		[●]%
Miscellaneous Other Expenses		[●]%
Interest Expense⁽⁶⁾		[●]%
Total Annual Expenses		[●]%
Fee Waivers and/or Expense Reimbursements⁽⁴⁾		([●])%
Total Annual Expenses After Fee Waivers and/or Expense Reimbursements⁽⁴⁾		[●]%

(1)	Trust shareholders will pay all offering expenses involved with this offering.

(2)

Computershare Trust Company, N.A.’s (the “Reinvestment Plan Agent”) fees for the handling of the reinvestment of dividends will be paid by the Trust. However, you will pay a $0.02 per share fee incurred in connection with open-market purchases, which will be deducted from the value of the dividend. You will also be charged a $0.02 per share fee if you direct the Reinvestment Plan Agent to sell your common shares held in a dividend reinvestment account. Per share fees include any applicable brokerage commissions the Reinvestment Plan Agent is required to pay.

(3)

The Advisor receives an annual fee, payable monthly, in an amount equal to 0.55% of the average daily value of the Trust’s Managed Assets. “Managed Assets” means the total assets of the Trust (including any assets attributable to money borrowed for investment purposes) minus the sum of the Trust’s accrued liabilities (other than money borrowed for investment purposes).

(4)

The Trust and the Advisor have entered into a fee waiver agreement (the “Fee Waiver Agreement”), pursuant to which the Advisor has contractually agreed to waive the management fee with respect to any portion of the Trust’s assets attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds managed by the Advisor or its affiliates and other exchange-traded products sponsored by the Advisor or its affiliates, in each case that have a contractual management fee, through June 30, [2027]. In addition, pursuant to the Fee Waiver Agreement, the Advisor has contractually agreed to waive its management fees by the amount of investment advisory fees the Trust pays to the Advisor indirectly through its investment in money market funds managed by the Advisor or its affiliates, through June 30, [2027]. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Trust (upon the vote of a majority of the Trustees who are not “interested persons” (as defined in the Investment Company Act) of the Trust or a majority of the outstanding voting securities of the Trust), upon 90 days’ written notice by the Trust to the Advisor.

(5)	[Other expenses are based on estimated amounts for the current fiscal year.]

(6)	Reflects leverage in the form of [_____]. The interest expense borne by the Trust will vary over time in accordance with the level of the Trust’s use of leverage and variations in market interest rates. Interest expense is required to be treated as an expense of the Trust for accounting purposes.

The purpose of the table above and the examples below is to help you understand all fees and expenses that you, as a holder of Common Shares, would bear directly or indirectly.

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Example

1 Year

3 Years

5 Years

10 Years

Total expenses incurred

[●]

USE OF PROCEEDS

The Trust estimates the net proceeds of the Rights offering to be approximately $[●], based on the estimated Subscription Price per Common Share of $[●] ([●]% of the last reported sales price of the Trust’s Common Shares on the NYSE on [●], 2026 and each of the [● (●)] preceding trading days), assuming all new Common Shares offered are sold and that the expenses related to the Rights offering estimated at approximately $[●] are paid.

The net proceeds from the Rights offering hereunder will be invested in accordance with the Trust’s investment objectives and policies as set forth in this Prospectus Supplement and the accompanying Prospectus. We currently anticipate that we will be able to invest all of the net proceeds in accordance with our investment objectives and policies within approximately three months of the receipt of such proceeds; however, the identification of appropriate investment opportunities pursuant to the Trust’s investment style or changes in market conditions could result in the Trust’s anticipated investment period extending to as long as six months. Pending such investment, it is anticipated that the proceeds will be primarily invested in short-term, tax-exempt or taxable investment grade securities. Depending on market conditions and operations, a portion of the cash held by the Trust, including any proceeds raised from the offering, may be used to pay distributions in accordance with the Trust’s distribution policy and may be a return of capital. A return of capital is a return to investors of a portion of their original investment in the Trust. In general terms, a return of capital would involve a situation in which a Trust distribution (or a portion thereof) represents a return of a portion of a shareholder’s investment in the Trust, rather than making a distribution that is funded from the Trust’s earned income or other profits. Although return of capital distributions may not be currently taxable, such distributions would decrease the basis of a shareholder’s shares, and therefore, may increase a shareholder’s tax liability for capital gains upon a sale of shares, even if sold at a loss to the shareholder’s original investments.

CAPITALIZATION

The following table sets forth the unaudited capitalization of the Trust as of [●], 2026 and its adjusted capitalization assuming the Common Shares available in the Rights offering discussed in this Prospectus Supplement had been issued.

[To be provided.]

SPECIAL CHARACTERISTICS AND RISKS OF THE RIGHTS OFFERING

Risk is inherent in all investing. Therefore, before investing in the Common Shares you should consider the risks associated with such an investment carefully. See “Risks” in the Prospectus. The following summarizes some of the matters that you should consider before investing in the Trust through the Rights offering:

Dilution. Record Date Shareholders who do not fully exercise their Rights will, at the completion of the Rights offering, own a smaller proportional interest in the Trust than owned prior to the Rights offering. The completion of the Rights offering will result in immediate voting dilution for such shareholders. Further, both the sales load and the

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expenses associated with the Rights offering will immediately reduce the NAV of each outstanding Common Share. In addition, if the Subscription Price is less than the NAV per Common Share as of the Expiration Date, the completion of this Rights offering will result in an immediate dilution of the NAV per Common Share for all existing Common Shareholders (i.e., will cause the NAV per Common Share to decrease). As a result, existing Common Shareholders may experience immediate dilution even if they fully exercise their Rights. Such dilution, if any, is not currently determinable because it is not known how many Common Shares will be subscribed for, what the NAV per Common Share or market price of the Common Shares will be on the Expiration Date or what the Subscription Price per Common Share will be. If the Subscription Price is substantially less than the current NAV per Common Share, this dilution could be substantial. The Trust will pay expenses associated with the Rights offering, estimated at approximately $[●]. In addition, the Trust has agreed to pay a dealer manager fee (sales load) equal to [●]% of the Subscription Price per Common Share issued pursuant to the exercise of Rights (including pursuant to the Over-Subscription Privilege). The Trust, not investors, pays the sales load, which is ultimately borne by all Common Shareholders. All of the costs of the Rights offering will be borne by the Trust’s Common Shareholders. See “Table of Fees and Expenses” in this Prospectus Supplement and “Summary of Trust Expenses” in the accompanying Prospectus for more information.

You will experience an immediate dilution of the aggregate NAV per Common Share if you do not participate in the Rights offering and will experience a reduction in the NAV per Common Share whether or not you exercise your Rights, if the Subscription Price is below the Trust’s NAV per Common Share on the Expiration Date, because:

●

the offered Common Shares are being sold at less than their current NAV;

●

you will indirectly bear the expenses of the Rights offering; and

●

the number of Common Shares outstanding after the Rights offering will have increased proportionately more than the increase in the amount of the Trust’s net assets.

On the other hand, if the Subscription Price is above the Trust’s NAV per Common Share on the Expiration Date, you may experience an immediate accretion of the aggregate NAV per share of your Common Shares even if you do not exercise your Rights and an immediate increase in the NAV per Common Share whether or not you participate in the Rights offering, because:

●

the offered Common Shares are being sold at more than their current NAV after deducting the expenses of the Rights offering; and

●

the number of Common Shares outstanding after the Rights offering will have increased proportionately less than the increase in the amount of the Trust’s net assets.

[Furthermore, if you do not participate in the secondary over-subscription, if it is available, your percentage ownership will also be diluted.] The Trust cannot state precisely the amount of any dilution because it is not known at this time what the NAV per Common Share will be on the Expiration Date or what proportion of the Rights will be exercised or what the Subscription Price per Common Share will be. The impact of the Rights offering on NAV per Common Share is shown by the following examples, assuming the Rights offering is fully subscribed and the estimated Subscription Price of $[●]:


Scenario 1: (assumes NAV per share is above Subscription Price)(1)
NAV(2)		[●]
Subscription Price(3)		[●]
Reduction in NAV ($)(4)		[●]
Reduction in NAV (%)		[●]

[Scenario 2: (assumes NAV per share is below Subscription Price)(1)
NAV(2)		[●]
Subscription Price(3)		[●]
Increase in NAV ($)(4)		[●]

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Increase in NAV (%)		[●]]

(1)	Both examples assume the full primary subscription [and secondary over-subscription privilege] are exercised. Actual amounts may vary due to rounding.

(2)	For illustrative purposes only; reflects the Trust’s NAV per Common Share as of [●], 2026. It is not known at this time what the NAV per Common Share will be on the Expiration Date.

(3)	For illustrative purposes only; reflects an estimated Subscription Price of $[●] based upon [●]% of the last reported sales price of the Trust’s Common Shares on the NYSE on [●], 2026. It is not known at this time what the Subscription Price will be on the Expiration Date.

(4)	Assumes $[●] in estimated offering expenses.

If you do not wish to exercise your Rights, you should consider selling them as set forth in this Prospectus Supplement. Any cash you receive from selling your Rights may serve as partial compensation for any possible dilution of your interest in the Trust. The Trust cannot give assurance, however, that a market for the Rights will develop or that the Rights will have any marketable value.

[The Trust’s largest shareholders could increase their percentage ownership in the Trust through the exercise of the primary subscription and over-subscription privilege.]

Risks of Investing in Rights. Shares of closed-end funds such as the Trust frequently trade at a discount to NAV. The Subscription Price may be greater than the market price of a Common Share on the Expiration Date. If that is the case, the Rights will have no value, and a person who exercises Rights will experience an immediate loss of value.

Leverage. Leverage creates a greater risk of loss, as well as a potential for more gain, for the Common Shares than if leverage were not used. Following the completion of the Rights offering, the Trust’s amount of leverage outstanding will decrease. The leverage of the Trust as of [●], 2026 was approximately [●]% of the Trust’s Managed Assets. After the completion of the Rights offering, the amount of leverage outstanding is expected to decrease to approximately [●]% of the Trust’s Managed Assets. The use of leverage for investment purposes creates opportunities for greater total returns but at the same time increases risk. When leverage is employed, the NAV and market price of the Common Shares and the yield to holders of Common Shares may be more volatile. Any investment income or gains earned with respect to the amounts borrowed in excess of the interest due on the borrowing will augment the Trust’s income. Conversely, if the investment performance with respect to the amounts borrowed fails to cover the interest on such borrowings, the value of the Trust’s Common Shares may decrease more quickly than would otherwise be the case, and distributions on the Common Shares could be reduced or eliminated. Interest payments and fees incurred in connection with such borrowings will reduce the amount of net income available for distribution to holders of the Common Shares.

The Trust’s leveraging strategy may not be successful.

Increase in Share Price Volatility; Decrease in Share Price. The Rights offering may result in an increase in trading of the Common Shares, which may increase volatility in the market price of the Common Shares. The Rights offering may result in an increase in the number of shareholders wishing to sell their Common Shares, which would exert downward price pressure on the price of Common Shares.

Under-Subscription. It is possible that the Rights offering will not be fully subscribed. Under-subscription of the Rights offering would have an impact on the net proceeds of the Rights offering and whether the Trust achieves any benefits.

TAXATION

The following is a general summary of the U.S. federal income tax consequences of the Rights offering to Record Date Shareholders who are U.S. persons for U.S. federal income tax purposes. The following summary supplements the discussion set forth in the accompanying Prospectus and SAI and is subject to the qualifications and assumptions set forth therein. The discussion set forth herein does not constitute tax advice and potential investors are urged to consult their own tax advisers to determine the tax consequences of investing in the Trust.

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[Please refer to the “Tax Matters” sections in the Trust’s Prospectus and SAI for a description of the consequences of investing in the Trust’s Common Shares. Special tax considerations relating to this Rights offering are summarized below:

●

The value of a Right will not be includible in the income of a Common Shareholder at the time the Right is issued.

●

The basis of a Right issued to a Common Shareholder will be zero, and the basis of the Common Share with respect to which the Right was issued (the “Old Common Share”) will not change, unless either the fair market value of the Right on the date of distribution is at least 15% of the fair market value of the Old Common Share, or such Common Shareholder affirmatively elects (in the manner set out in Treasury Regulations under the Code) to allocate to the Right a portion of the basis of the Old Common Share. If the basis of a Right or Old Common Share changes, such Common Shareholder must allocate basis between the Old Common Share and the Right in proportion to their fair market values on the date of distribution.

●

The basis of a Right purchased will generally be its purchase price.

●

A Common Shareholder’s holding period in a Right issued includes the holding period of the Old Common Share.

●

A Common Shareholder will not recognize a loss if a Right distributed to such Common Shareholder expires unexercised because the basis of the Old Common Share may be allocated to a Right only if the Right is sold or exercised. If a Right that has been purchased in the market expires unexercised, there will be a recognized loss equal to the basis of the Right.

●

Any gain or loss on the sale of a Right will be a capital gain or loss if the Right is held as a capital asset (which in the case of a Right issued to Record Date Shareholders will depend on whether the Old Common Share is held as a capital asset), and will be a long term capital gain or loss if the holding period is deemed to exceed one year.

●

No gain or loss will be recognized by a Common Shareholder upon the exercise of a Right, and the basis of any Common Share acquired upon exercise (the “New Common Share”) will equal the sum of the basis, if any, of the Right and the Subscription Price for the New Common Share. The holding period for the New Common Share will begin on the date when the Right is exercised (or, in the case of a Right purchased in the market, potentially the day after the date of exercise).]

The foregoing is a general and brief summary of the provisions of the Code and the Treasury Regulations in effect as they directly govern the taxation of the Trust and its Common Shareholders, with respect to U.S. federal income taxation only. Other tax issues such as state and local taxation may apply. Investors are urged to consult their own tax advisors to determine the tax consequences of investing in the Trust. These provisions are subject to change by legislative or administrative action, and any such change may be retroactive.

PLAN OF DISTRIBUTION

[Distribution Arrangements

[●] will act as Dealer Manager for this Rights offering. Under the terms and subject to the conditions contained in the Dealer Manager Agreement among the Dealer Manager, the Trust and the Advisor, the Dealer Manager will provide financial structuring and solicitation services in connection with the Rights offering and will solicit the exercise of Rights and participation in the over-subscription privilege. The Rights offering is not contingent upon any number of Rights being exercised. The Dealer Manager will also be responsible for forming and managing a group of selling broker-dealers (each, a “Selling Group Member” and collectively, the “Selling Group Members”), whereby each Selling Group Member will enter into a Selling Group Agreement with the Dealer Manager to solicit the exercise of Rights and to sell Common Shares purchased by the Selling Group Member from the Dealer Manager. In addition, the Dealer Manager will enter into a Soliciting Dealer Agreement with other soliciting broker-dealers (each, a “Soliciting Dealer” and collectively, the “Soliciting Dealers”) to solicit the exercise of Rights. See “—Compensation to Dealer Manager” for a discussion of fees and other compensation to be paid to the Dealer Manager, Selling Group Members and Soliciting Dealers in connection with the Rights offering.

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The Trust and the Advisor have each agreed to indemnify the Dealer Manager for losses arising out of certain liabilities, including liabilities under the Securities Act. The Dealer Manager Agreement also provides that the Dealer Manager will not be subject to any liability to the Trust in rendering the services contemplated by the Dealer Manager Agreement except for any act of willful misfeasance, bad faith or gross negligence of the Dealer Manager or reckless disregard by the Dealer Manager of its obligations and duties under the Dealer Manager Agreement.

In order to seek to facilitate the trading market in the Rights for the benefit of non-exercising shareholders, and the placement of the Common Shares to new or existing investors pursuant to the exercise of the Rights, the Dealer Manager Agreement provides for special arrangements with the Dealer Manager. Under these arrangements, the Dealer Manager is expected to purchase Rights on the [●], as well as Rights received by the Subscription Agent for sale by Record Date Shareholders and offered to the Dealer Manager and unexercised Rights of Record Date Shareholders whose record addresses are outside the United States that are held by the Subscription Agent and for which no instructions are received. The number of rights, if any, purchased by the Dealer Manager will be determined by the Dealer Manager in its sole discretion. The Dealer Manager is not obligated to purchase Rights or Common Shares as principal for its own account to facilitate the trading market for Rights or for investment purposes. Rather, its purchases are expected to be closely related to interest in acquiring Common Shares generated by the Dealer Manager through its marketing and soliciting activities. The Dealer Manager intends to exercise Rights purchased by it during the Subscription Period but prior to the Expiration Date. The Dealer Manager may exercise those Rights at its option on one or more dates, which are expected to be prior to the Expiration Date. The Subscription Price for the Common Shares issued through the exercise of Rights by the Dealer Manager prior to the Expiration Date will be the greater of [●]% of the last reported sale price of a Common Share on the NYSE on the date of exercise or [●]% of the last reported NAV of a Common Share on the date prior to the date of exercise. The price and timing of these exercises are expected to differ from those described herein for the Rights offering. The Subscription Price will be paid to the Trust and the dealer manager fee with respect to such proceeds will be paid by the Trust on the applicable settlement date(s) of such exercise(s).

In connection with the exercise of Rights and receipt of Common Shares, the Dealer Manager intends to offer those Common Shares for sale to the public and/or through a group of selling members it has established. The Dealer Manager may set the price for those Common Shares at any price that it determines, in its sole discretion. The Dealer Manager has advised that the price at which such Common Shares are offered is expected to be at or slightly below the closing price of the Common Shares on the NYSE on the date the Dealer Manager exercises Rights. No portion of the amount paid to the Dealer Manager or to a Selling Group Member from the sale of Common Shares in this manner will be paid to the Trust. If the sales price of the Common Shares is greater than the Subscription Price paid by the Dealer Manager for such Common Shares plus the costs to purchase Rights for the purpose of acquiring those Common Shares, the Dealer Manager will receive a gain. Alternatively, if the sales price of the Common Shares is less than the Subscription Price for such Common Shares plus the costs to purchase Rights for the purpose of acquiring those Common Shares, the Dealer Manager will incur a loss. The Dealer Manager will pay a concession to Selling Group Members in an amount equal to approximately [●]% of the aggregate price of the Common Shares sold by the respective Selling Group Member. Neither the Trust nor the Advisor have a role in setting the terms, including the sales price, on which the Dealer Manager offers for sale and sells Common Shares it has acquired through purchasing and exercising Rights or the timing of the exercise of Rights or sales of Common Shares by the Dealer Manager. Persons who purchase Common Shares from the Dealer Manager or the selling group will purchase shares at a price set by the Dealer Manager, which may be more or less than the Subscription Price, and at a time set by the Dealer Manager, which is expected to be prior to the Expiration Date.

The Dealer Manager may purchase Rights as principal or act as agent on behalf of its clients for the resale of such Rights. The Dealer Manager may realize gains (or losses) in connection with the purchase and sale of Rights and the sale of Common Shares, although such transactions are intended by the Dealer Manager to facilitate the trading market in the Rights and the placement of the Common Shares to new or existing investors pursuant to the exercise of the Rights. Any gains (or losses) realized by the Dealer Manager from the purchase and sale of Rights and the sale of Common Shares is independent of and in addition to its fee as Dealer Manager. The Dealer Manager has advised that any such gains (or losses) are expected to be immaterial relative to its fee as Dealer Manager.

Since neither the Dealer Manager nor persons who purchase Common Shares from the Dealer Manager or members of the selling group were Record Date Shareholders, they would not be able to participate in the over-subscription privilege.

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Persons who purchase Common Shares from the Dealer Manager or the selling group will not purchase shares at the Subscription Price based on the formula price mechanism through which Common Shares will be sold in the Rights offering. Instead, those persons will purchase Common Shares at a price set by the Dealer Manager, which may be more or less than the Subscription Price, and will not have the uncertainty of waiting for the determination of the Subscription Price on the Expiration Date.

There is no limit on the number of Rights the Dealer Manager can purchase or exercise. Common Shares acquired by the Dealer Manager pursuant to the exercise of Rights acquired by it will reduce the number of Common Shares available pursuant to the over-subscription privilege, perhaps materially, depending on the number of Rights purchased and exercised by the Dealer Manager.

Although the Dealer Manager can seek to facilitate the trading market for Rights as described above, investors can acquire Common Shares at the Subscription Price by acquiring Rights on the [●] and exercising them in the method described above under “Description of the Rights—Method of Exercise of Rights” and “Description of the Rights—Payment for Shares.”

In the ordinary course of their businesses, the Dealer Manager and/or its affiliates may engage in investment banking or financial transactions with the Trust, the Advisor and their affiliates. In addition, in the ordinary course of their businesses, the Dealer Manager and/or its affiliates may, from time to time, own securities of the Trust or its affiliates.

The principal business address of the Dealer Manager is [●].

Compensation to Dealer Manager

Pursuant to the Dealer Manager Agreement, the Trust has agreed to pay the Dealer Manager a fee for its financial structuring and solicitation services equal to [●]% of the Subscription Price per Common Share for each Common Share issued pursuant to the exercise of Rights, including the over-subscription privilege.

The Dealer Manager will reallow to Selling Group Members in the selling group to be formed and managed by the Dealer Manager selling fees equal to [●]% of the Subscription Price for each Common Share issued pursuant to the Rights offering or the over-subscription privilege as a result of their selling efforts. In addition, the Dealer Manager will reallow to Soliciting Dealers that have executed and delivered a Soliciting Dealer Agreement and have solicited the exercise of Rights, solicitation fees equal to [●]% of the Subscription Price for each Common Share issued pursuant to the exercise of Rights as a result of their soliciting efforts, subject to a maximum fee based on the number of Common Shares held by such Soliciting Dealer through [insert depository] on the Record Date. Fees will be paid to the broker-dealer designated on the applicable portion of the subscription certificates or, in the absence of such designation, to the Dealer Manager.

In addition, the Trust, has agreed to pay the Dealer Manager an amount up to $[●] as a partial reimbursement of its expenses incurred in connection with the Rights offering, including reasonable out-of-pocket fees and expenses, if any and not to exceed $[●], incurred by the Dealer Manager, Selling Group Members, Soliciting Dealers and other brokers, dealers and financial institutions in connection with their customary mailing and handling of materials related to the Rights offering to their customers. No other fees will be payable by the Trust or the Advisor to the Dealer Manager in connection with the Rights offering.]

LEGAL MATTERS

Willkie Farr & Gallagher LLP, New York, New York, serves as counsel to the Trust. Certain legal matters in connection with the common shares will be passed upon for the Trust by [●]. [Certain legal matters will be passed upon by [●] as special counsel to the Dealer Manager in connection with the Rights offering.]

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FINANCIAL STATEMENTS

The audited annual financial statements of the Trust for the fiscal year ended December 31, 202[●] [and the unaudited financial statements for the six months ended June 30, 202[●]] are incorporated by reference into this Prospectus Supplement, the accompanying Prospectus and the SAI.

ADDITIONAL INFORMATION

This Prospectus Supplement and the accompanying Prospectus constitute part of a Registration Statement filed by the Trust with the SEC under the Securities Act and the Investment Company Act. This Prospectus Supplement and the accompanying Prospectus omit certain of the information contained in the Registration Statement, and reference is hereby made to the Registration Statement and related exhibits for further information with respect to the Trust and the common shares offered hereby. Any statements contained herein concerning the provisions of any document are not necessarily complete, and, in each instance, reference is made to the copy of such document filed as an exhibit to the Registration Statement or otherwise filed with the SEC. Each such statement is qualified in its entirety by such reference. The complete Registration Statement may be obtained from the SEC upon payment of the fee prescribed by its rules and regulations or free of charge through the SEC’s website (http://www.sec.gov).

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		more detail under “Risks” beginning on page 36 of this Prospectus, along with additional risks relating to an investment in the Trust.

Anti-Takeover Provisions		The Trust’s Amended and Restated Agreement and Declaration of Trust and Bylaws include provisions that could limit the ability of other entities or persons to acquire control of the Trust or convert the Trust to open-end status or to change the composition of the Board. Such provisions could limit the ability of shareholders to sell their shares at a premium over prevailing market prices by discouraging a third party from seeking to obtain control of the Trust. See “Certain Provisions in the Agreement and Declaration of Trust and Bylaws.”


CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS			S-1
PROSPECTUS SUPPLEMENT SUMMARY			S-2
SUMMARY OF TRUST EXPENSES			S-4
USE OF PROCEEDS			S-5
CAPITALIZATION			S-5
PLAN OF DISTRIBUTION			S-5
LEGAL MATTERS			S-5
ADDITIONAL INFORMATION			S-6