Subject to Completion

Preliminary Prospectus dated July 3, 2025

The information in this 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 Prospectus is not an offer to sell these securities and is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Prospectus

[ ], 2025

ARK ETF Trust [Structured] ETFs

ETF		[Exchange] Ticker Symbol
ARK Q1 Defined Innovation ETF		ARKI
ARK Q2 Defined Innovation ETF		ARKJ
ARK Q3 Defined Innovation ETF		ARKL
ARK Q4 Defined Innovation ETF		ARKM

The U.S. Securities and Exchange Commission (“SEC”) has not approved or disapproved these securities or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

TABLE OF CONTENTS

SUMMARY INFORMATION	1
ARK Q1 Defined Innovation ETF	1
ARK Q2 Defined Innovation ETF	9
ARK Q3 Defined Innovation ETF	17
ARK Q4 Defined Innovation ETF	25
ADDITIONAL INFORMATION ABOUT THE FUNDS’ INVESTMENT STRATEGIES AND RISKS	33
Investment Objective of the Fund	33
Principal Investment Strategies	33
Principal Risks	34
Additional Risks	39
Portfolio Holdings	39
MANAGEMENT OF THE FUNDS	40
SHAREHOLDER INFORMATION	41
Pricing of Fund Shares	41
Buying and Selling Shares	42
Distribution and Service Plan	42
Dividends and Distributions	42
Tax Consequences	43
Frequent Purchases and Redemptions of Fund Shares	45
TAX-ADVANTAGED PRODUCT STRUCTURE	45
FINANCIAL HIGHLIGHTS	45
PREMIUM/DISCOUNT INFORMATION	46
GENERAL INFORMATION	46

SUMMARY INFORMATION

ARK Q1 Defined Innovation ETF (ARKI)

Investment Objective

The ARK Q1 Defined Innovation ETF’s (“Fund”) investment objective is capital appreciation with a measure of downside protection.

Fund Fees and Expenses

The table below describes the fees and expenses that you pay if you buy, hold and sell shares of the Fund (“Shares”). Investors may pay other fees, such as brokerage commissions and other fees to financial intermediaries on their purchases and sales of Shares, which are not reflected in the tables and examples below.

Shareholder Fees (fees paid directly from your investment)	None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	[ ]	%
Distribution and/or Service (12b-1) Fees	[ ]	%
Other Expenses^(a)(b)	[ ]	%
Acquired Fund Fees and Expenses	[ ]	%
Total Annual Fund Operating Expenses^(b)	[ ]	%
Fee Waiver^(c)	[ ]	%
Total Annual Fund Operating Expenses After Fee Waiver	[ ]	%

(a)

Pursuant to a Supervision Agreement, ARK Investment Management LLC (“ARK” or “Adviser”) pays all other expenses of the Fund (other than acquired fund fees and expenses, taxes and governmental fees, brokerage fees, commissions and other transaction expenses, certain foreign custodial fees and expenses, costs of borrowing money, including interest expenses, and extraordinary expenses (such as litigation and indemnification expenses)).

(b)

Other Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.

(c)

The Adviser has voluntarily agreed to waive a portion of its management fee payable by the Fund in an amount equal to the investment advisory fee portion of the management fee it earns as an investment adviser to the affiliated fund(s) in which the Fund invests. The fee waiver arrangement will continue for at least one year from the date of this Prospectus.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account brokerage commissions that you pay when purchasing or selling Shares.

The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your Shares at the end of those periods. The example also assumes that your investment has a 5% annual return and that the Fund’s operating expenses remain the same (except that the example incorporates any applicable fee waiver and/or expense limitation arrangements for only the first year). Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Year	Expenses
1	$	[ ]
3	$	[ ]

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it purchases and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may result in higher transaction costs and higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, may affect the Fund’s performance. This Fund is newly offered. Therefore, it does not have a turnover rate to report for the most recent fiscal year.

Principal Investment Strategies

The ARK Q1 Defined Innovation ETF (the “Fund”) is an actively-managed exchange-traded fund (“ETF”) that, for rolling 12-month periods from [January] to [January] (each, an “Outcome Period”) seeks to provide investors with a defined risk-return profile, before fees and expenses. Specifically, the Fund is structured to limit downside participation to approximately 50% of any decline in the share price of the ARK Innovation ETF (the “Underlying ETF”), measured from its value at the beginning of each Outcome Period—meaning losses to the Fund’s net asset value (“NAV”) are expected not to exceed 50%, even if the Underlying ETF declines more significantly. At the same time, the Fund is structured to provide maximum participation in the Underlying ETF’s upside above a predefined approximately 5% hurdle rate (the “Hurdle”). The Hurdle is defined as approximately 105% of the Underlying ETF’s share price at the beginning of each Outcome Period, and corresponds to the strike price of the long out-of-the-money call options purchased by the Fund to capture the upside performance beyond that threshold.

Use of Options

To pursue this objective, the Fund employs a structured options strategy:

Delta-One Exposure: The Fund invests substantially all of its assets in the Underlying ETF, creating a delta-one position (meaning that the price of the Fund’s shares moves one-for-one with the share price of the Underlying ETF) that provides full, unhedged exposure to the Underlying ETF throughout the Outcome Period; and,

Call Write to Fund Options Budget: On the trading day prior to the start of an Outcome Period (an “Initial Investment Day”), the Fund writes (sells) at-the-money call options on the Underlying ETF, with a notional value equal to 100% of the Fund’s NAV. This written call position caps direct participation in the Underlying ETF’s upside at 100% of its starting value and generates the option premium budget used to construct the Fund’s payoff structure; and,

Use of Option Premiums:

The Fund uses part of the call premium to purchase out-of-the-money call options on the Underlying ETF with strike prices equal to 105% of the Underlying ETF’s share price at the beginning of the Outcome Period (i.e. the Hurdle). This creates a zero payoff region between 100% and 105%, and allows the Fund to provide maximum upside participation above 105% through the long calls, subject to the size of the notional coverage; and,

The remaining premium is used to purchase at-the-money put options on the Underlying ETF with a notional value equal to 50% of the Fund’s NAV. This put position offsets half of the Fund’s delta-one exposure to the Underlying ETF’s downside, resulting in a 50% net downside participation over the Outcome Period. In other words, for every 1% decline in the Underlying ETF, the Fund is expected to decline by approximately 0.5%, up to the full 50% cap.

Participation Above the Hurdle

The Fund’s long out-of-the-money call options provide the right to purchase shares of the Underlying ETF at the Hurdle. To the extent the Underlying ETF’s share price exceeds the Hurdle at the end of the Outcome Period, the Fund is expected to realize those excess returns, before fees and expenses, through the cash settlement of these call options. The level of upside participation will reflect the notional exposure of the Fund’s long call position, which is expected to provide meaningful but less than one-for-one participation in gains above the Hurdle. Actual participation may vary depending on market conditions and option pricing.

Because the Fund’s strategy relies on options, its performance, even when the Underlying ETF’s share price gains significantly, may underperform a direct investment in the Underlying ETF. This is particularly true when the costs associated with purchasing long call options are high. As such, the Fund’s correlation to the Underlying ETF’s returns above the Hurdle is expected to be lower than a direct investment and could, in some environments, be substantially less.

Options Sourcing and Execution

The Fund will invest in exchange-traded FLexible EXchange Options (“FLEX Options”). FLEX Options are customizable option contracts listed on and available through the Chicago Board Option Exchange (“Cboe”) and guaranteed for settlement by the Options Clearing Corporation (“OCC”). These options allow customization of key terms such as strike price, exercise style, and expiration date, while offering transparent, competitive pricing through auction markets. Importantly, FLEX options eliminate the counterparty risk associated with over-the-counter (“OTC”) derivatives by benefiting from OCC clearing.

The Fund will invest in European-style FLEX Options, which can only be exercised at expiration. These options will be based on the performance of the Underlying ETF and are designed to expire on the last day of the Outcome Period. In general, the Fund intends to maximize its use of FLEX Options, as they provide an optimal blend of OCC guarantees, customization, price discovery, expiration-style consistency—all of which align well with the Fund’s outcome-seeking strategy. However, the Fund may use standardized listed options when the Sub-Adviser believes doing so offers beneficial market exposure or enhanced portfolio efficiency.

Principal Risks

There is no assurance that the Fund will meet its investment objective. The value of your investment in the Fund, as well as the amount of return you receive on your investment in the Fund, may fluctuate significantly. You may lose part or all of your investment in the Fund or your investment may not perform as well as other similar investments. Therefore, you should consider carefully the following risks before investing in the Fund. The principal risks of investing in the Fund listed below are presented alphabetically to facilitate your ability to find particular risks and compare them with the risks of other funds. Each risk summarized below is considered a “principal risk” of investing in the Fund, regardless of the order in which it appears.

Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”) on an agency basis (i.e., on behalf of other market participants). To the extent that those APs exit the business or are unable to process creation and/or redemption orders, and no other AP is able to step forward to create and redeem in either of these cases, Shares may possibly trade at a discount to net asset value (“NAV”).

Clearing Member Default Risk. Transactions in certain options such as FLEX Options and listed options are required to be centrally cleared ("cleared options"). In a transaction involving cleared options, the Fund's counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house ("clearing members") can participate directly in the clearing house, the Fund will hold cleared options through accounts at clearing members. In cleared options positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Margin requirements are set by the OCC and the Fund's clearing member and generally may be increased at any time. Margin requirements could increase significantly during periods of volatility or market disruptions, and the Fund may be forced to sell assets at a disadvantageous time or price to meet such margin calls, which could negatively impact the Fund's performance. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member's individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its options contracts may, in certain circumstances, be used to satisfy losses of other clients of the Fund's clearing member. In addition, although clearing members guarantee performance of their clients' obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member's bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund's behalf, which heightens the risks associated with a clearing member's default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund's ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund's behalf, the Fund may be unable to effectively implement its investment strategy.

Cyber Security Risk. As the use of internet technology has become more prevalent in the course of business, funds have become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events from external or internal sources that may cause the Fund to lose proprietary information, suffer data corruption, lose operational capacity, or result in unauthorized access to confidential information. Such events could prevent the Fund from engaging in normal business activities and cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve, among other things, unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, ransomware attacks that impair the Fund’s ability to access its data or systems until a ransom is paid, or denial-of-service attacks that make network services unavailable to intended users. Recently, geopolitical tensions may have increased the scale and sophistication of deliberate attacks, particularly those from nation-states or from entities with nation-state backing. In addition, cyber security breaches of the Fund’s third-party service providers, such as its adviser, administrator, transfer agent or custodian, the Fund’s trading counterparties, and issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. Cyber security breaches experienced by an issuer in which the Fund invests can also impact the value of the Fund’s investment in that issuer. While the Fund has established business continuity plans and risk management systems designed to reduce the risks associated with cyber security, there are inherent limitations in such plans and systems. Additionally, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of its third-party service providers, trading counterparties, or issuers.

Derivatives Risk. Derivatives involve risks different from, and, in certain cases, greater than, the risks presented by more traditional investments. These include credit risk, liquidity risk, management risk and leverage risk. Derivative products are highly specialized instruments that require an understanding not only of the underlying instrument but also of the derivative itself, without the benefit of observing the performance of the derivative under all possible market conditions. In particular, the use and complexity of derivatives require the maintenance of adequate controls to monitor the transactions entered into, the ability to assess the risk that a derivative adds to the Fund’s investment portfolio, and the ability to forecast price, interest rate or currency exchange rate movements correctly. The failure of another party to a derivative to comply with the terms may cause the Fund to incur a loss. The credit risk for exchange-traded or centrally cleared derivatives is generally less than for privately negotiated derivatives through the interposition of a clearinghouse to the exchange-traded or centrally-cleared derivative trade, which provides a guarantee of performance. If a derivative transaction is particularly large or if the relevant market is illiquid (as is the case with many privately negotiated derivatives), it may not be possible to initiate a transaction or liquidate a position at an advantageous price. Adverse changes in the value or level of the underlying asset, rate or index can result in a loss substantially greater than the amount invested in the derivative itself.

FLEX Options Risk. The Fund utilizes FLEX Options guaranteed for settlement by the OCC, and it bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts, which is a form of counterparty risk. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In a less liquid market, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices (and may have to pay a premium or accept a discounted price). The Fund may experience substantial downside from certain FLEX Option positions, and FLEX Option positions may expire worthless. The value of the FLEX Options will be affected by, among other things, changes in the value of the Underlying ETF, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time until the FLEX Options expire. The value of FLEX Options does not increase or decrease at the same rate as the level of the Underlying ETF (although they generally move in the same direction).

Investment Objective and Outcomes Risk. There is no guarantee that the Fund will succeed in its attempt to achieve its investment objective and/or its strategy to limit the Fund's exposure to losses in the Underlying ETF’s share price to no more than 50% of the Fund’s NAV during the Outcome Period. An investor could lose some or all of their investment in the Fund. Circumstances under which the Fund might not achieve its objective and/or its strategy to limit the Fund's exposure to losses in the Underlying ETF’s share price to no more than 50% of the Fund’s NAV during the Outcome Period include, but are not limited to: (i) if the Fund disposes of FLEX Options; (ii) if the Fund is unable to maintain the intended proportional relationship based on the number of FLEX Options in the Fund’s portfolio; (iii) significant accrual of Fund expenses in connection with effecting the Fund’s investment strategy; (iv) losses resulting from the Fund’s investment strategy; or (v) adverse tax law changes affecting the treatment of FLEX Options.

Leverage Risk. To the extent that the Fund borrows money it may be leveraged. Additionally, certain transactions in which the Fund is permitted to engage may present leverage risk. Leveraging generally exaggerates the effect on NAV of any increase or decrease in the market value of the Fund’s portfolio securities. Leveraging may cause the Fund to liquidate portfolio positions to satisfy its obligations or to meet segregation requirements when it may not be advantageous to do so. Leveraging, including borrowing, may cause the Fund to be more volatile than if the Fund had not been leveraged.

Limited Loss Risk. There is no guarantee that the Fund will be successful in its strategy to limit the Fund's exposure to losses in the Underlying ETF’s share price to no more than 50% of the Fund’s NAV during the Outcome Period. In the event an investor purchases shares after the commencement of the Outcome Period or redeems shares prior to the end of the Outcome Period, the investor may not fully participate in the share price gains of the Underlying ETF beyond the Hurdle to which the Fund seeks to provide exposure. The Fund does not provide principal protection and an investor may incur significant losses on their investment, including the potential loss of their entire investment.

Liquidity Risk. The Fund may invest in securities or instruments that trade in lower volumes and may make investments that are illiquid or that may become less liquid in response to market developments or adverse investor perceptions. Also, the Fund may make investments that are illiquid. Investments that are illiquid or that trade in lower volumes may be more difficult to value. When there is no willing buyer and investments cannot be readily sold at the desired time or price, the Fund may have to accept a lower price or may not be able to sell the security or instrument at all. An inability to sell one or more portfolio positions can adversely affect the Fund’s value. Liquidity risk may be the result of, among other things, the reduced number and capacity of traditional market participants to make a market in fixed income securities or the lack of an active market. The potential for liquidity risk may be magnified by a rising interest rate environment or other circumstances where investor redemptions from fixed income funds may be higher than normal, potentially causing increased supply in the market due to selling activity. Redemptions by large shareholders (including seed investors) may have a negative impact on the Fund’s liquidity. If the Fund is forced to sell securities at an unfavorable time and/or under unfavorable conditions, such sales may adversely affect the Fund’s NAV.

Liquidity Risk — Listed Options. There is no guarantee that a liquid secondary trading market will exist for the listed options in which the Fund may invest. The trading in listed options may be less deep and liquid than the market for certain other exchange traded option contracts. In a less liquid market for the listed options terminating the listed options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of listed options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its Listed Option positions. A less liquid trading market may adversely impact the value of the listed options and the value of your investment.

Liquidity Risk — OTC Options. There is no guarantee that a liquid secondary trading market will exist for OTC Options. The trading in OTC Options may be less deep and liquid than the market for certain other securities, including exchange traded option contracts. In a less liquid market for the OTC Options, terminating the OTC Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. A less liquid trading market may adversely impact the value of the OTC Options and the value of your investment.

Position Limits Risk. The options exchanges have established limits on the maximum number of puts and calls covering the same underlying security that may be held or written by a single investor or group of investors acting in concert or under common control (regardless of whether the options are purchased or written on the same or different exchanges or are held or written in one or more accounts or through one or more brokers). These are referred to as "position limits." The position limit applicable to a particular option class is determined by the options exchange based on the number of shares outstanding and trading volume of the security underlying the option. The rules of the options markets generally limit the maximum number of options on the same side of the market (i.e., calls held plus puts written, or puts held plus calls written) with respect to a single underlying interest that may be carried in the accounts of a single investor or group of investors acting in concert. An options market may require that positions in certain listed options or FLEX Options be aggregated with positions in certain other options for purposes of calculating position limits.

The clearing members that clear the Fund's listed option positions are required to monitor and report the Fund's positions to the options exchanges and may be required to liquidate positions in excess of these limits. Failure to comply with position limits may result in the imposition of fines and other sanctions by the options exchanges.

Even if the Fund does not intend to exceed applicable position limits, it is possible that different clients managed by the Advisor and its affiliates may be aggregated. Therefore, the trading decisions of the Advisor may have to be modified and positions held by the Fund liquidated in order to avoid exceeding such limits. The modification of investment decisions or the elimination of open positions, if it occurs, may adversely affect the profitability of the Fund and prevent the Fund from achieving its investment objective. A violation of position limits could also lead to regulatory action materially adverse to the Fund's investment strategy.

Management Risk. As an actively-managed ETF, the Fund is subject to management risk. The ability of the Adviser to successfully implement the Fund’s investment strategies will significantly influence the Fund’s performance. The success of the Fund will depend in part upon the skill and expertise of certain key personnel of the Adviser, and there can be no assurance that any such personnel will continue to be associated with the Fund.

Market Risk. The value of the Fund’s assets will fluctuate as the markets in which the Fund invests fluctuate. The value of the Fund’s investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events, such as inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, military conflict, acts of terrorism, social unrest, environmental disasters, natural disasters or events, recessions, supply chain disruptions, political instability, and infectious disease epidemics or pandemics.

For example, an outbreak of an infectious disease may negatively affect economies, markets and individual companies throughout the world, including those in which the Fund invests. The effects of such pandemics to public health and business and market conditions, including exchange trading suspensions and closures may have a significant negative impact on the performance of the Fund’s investments, increase the Fund’s volatility, negatively impact the Fund’s arbitrage and pricing mechanisms, exacerbate pre-existing political, social and economic risks to the Fund, and negatively impact broad segments of businesses and populations. The Fund’s operations may be interrupted as a result, which may contribute to the negative impact on investment performance. In addition, governments, their regulatory agencies, or self-regulatory organizations may take actions in response to a pandemic that affect the instruments in which the Fund invests, or the issuers of such instruments, in ways that could have a significant negative impact on the Fund’s investment performance.

New Fund Risk. There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board may determine to liquidate the Fund if it determines that liquidation is in the best interest of shareholders. Liquidation of the Fund can be initiated without shareholder approval. As a result, the timing of the Fund’s liquidation may not be favorable.

Operational Risk. The Fund is exposed to operational risk arising from a number of factors, including but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third parties, failed or inadequate processes and technology or system failures. Additionally, the success of the Fund will depend in part upon the skill and expertise of certain personnel of the Adviser, and there can be no assurance that any such personnel will continue to be associated with the Fund.

Option Writing Risk. The Fund invests in options that derive their performance from the performance of the Underlying ETF. Writing and buying options are speculative activities and entail investment exposures that are greater than their cost would suggest, meaning that a small investment in an option could have a substantial impact on the performance of the Fund. The Fund’s use of call and put options can lead to losses because of adverse movements in the price or value of the underlying stock, index, or other asset, which may be magnified by certain features of the options. These risks are heightened when the Fund’s portfolio managers use options to enhance the Fund’s return or as a substitute for a position or security. When selling a call or put option, the Fund will receive a premium; however, this premium may not be enough to offset a loss incurred by the Fund if the price of the underlying asset is above or below, respectively, the strike price by an amount equal to or greater than the premium. The value of an option may be adversely affected if the market for the option becomes less liquid or smaller, and will be affected by changes in the value or yield of the option’s underlying asset, an increase in interest rates, a change in the actual or perceived volatility of the stock market or the underlying asset and the remaining time to expiration. Additionally, the value of an option does not increase or decrease at the same rate as the underlying asset(s). The Fund’s use of options, due to the cost of the options, will reduce the Fund’s ability to get returns equal to the Underlying ETF. This means that if the Underlying ETF experiences gains for an Outcome Period, the Fund will not benefit to the same extent from those gains. In addition, if the price of the underlying asset of an option is above the strike price of a written call option or below the strike price for a written put option, the value of the option, and consequently of the Fund, may decline significantly more than if the Fund invested directly in the underlying asset instead of using options. The Fund invests in options that derive their performance from the performance of the Underlying ETF and can be volatile and involve various types and degrees of risks. The Fund could experience a loss if its options do not perform as anticipated, or are not correlated with the performance of their underlying stock or if the Fund is unable to purchase or liquidate a position because of an illiquid secondary market.

Outcome Period Risk. The Fund’s investment strategy is designed to deliver returns that match the Underlying ETF, subject to the Hurdle and the Fund's strategy to limit the Fund's exposure to losses in the Underlying ETF’s share price to no more than 50% of the Fund’s NAV during the Outcome Period, only if shares are bought by the first day of the Outcome Period and held until the end of the Outcome Period. If an investor purchases or sells shares during the Outcome Period, the returns realized by the investor will not match those that the Fund seeks to achieve. In addition, the Hurdle may change from one Outcome Period to the next within the range stated above and is unlikely to remain the same for consecutive Outcome Periods. Moreover, the Fund’s returns will be reduced by Fund fees and expenses as well as any brokerage commissions, trading fees, taxes and non-routine or extraordinary expenses incurred by the Fund throughout an Outcome Period. Accordingly, the performance of the Fund over an Outcome period will be reduced by these fees and expenses.

Sector Risk. The Fund may, from time to time, invest more heavily in companies in a particular economic sector or sectors. Economic or regulatory changes adversely affecting such sectors may have more of an impact on the Fund’s performance than if the Fund held a broader range of investments.

Shareholder Risk. Certain shareholders, including other funds advised by the Adviser, may from time to time own a substantial amount of the Fund’s Shares. In addition, a third-party investor, the Adviser or an affiliate of the Adviser, an AP, a market maker, or another entity may invest in the Fund and hold its investment for a limited period of time. There can be no assurance that any large shareholder would not redeem its investment. Redemptions by shareholders could have a negative impact on the Fund. In addition, transactions by large shareholders may account for a large percentage of the trading volume on an exchange and may, therefore, have a material effect on the market price of the Shares.

Tracking Error Risk. Tracking error is the divergence of the Fund’s performance (without regard to the Hurdle) from that of the Underlying ETF. The performance of the Fund may diverge from that of the Underlying ETF for a number of reasons. Tracking error may occur because of transaction costs, the Fund’s holding of cash, differences in accrual of dividends, changes to the Underlying ETF or the need to meet new or existing regulatory requirements. Unlike the Fund, the returns of the Underlying ETF are not reduced by investment and other operating expenses, including the trading costs associated with implementing changes to its portfolio of investments. Tracking error risk may be heightened during times of market volatility or other unusual market conditions.

Trading Issues. Trading in Shares on an Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on an Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange’s “circuit breaker” rules. If a trading halt or unanticipated early closing of the Exchange occurs, a shareholder may be unable to purchase or sell Shares of the Fund. There can be no assurance that the requirements of an Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Tax Risk. Certain aspects of the tax treatment of derivative instruments are currently unclear and may be affected by changes in legislation, regulations or other legally binding authority. The federal income tax treatment of a derivative may be less favorable than that given to a direct investment in an underlying asset and may adversely affect the timing, character and amount of income the Fund realizes from its investments.

Performance

The Fund is newly offered. Performance history will be available for the Fund after it has been in operation for a full calendar year. Once available, the Fund’s performance information will be accessible on the Fund’s website at http://ark-funds.com.

Management of the Fund

Investment Adviser. ARK Investment Management LLC.

Sub-Adviser. Milliman Financial Risk Management LLC (the “Sub-Adviser” or “Milliman”).

Portfolio Manager. The following individual has been primarily responsible for the day-to-day management of the Fund’s portfolio since the inception of the Fund in [ ], 2025: Catherine D. Wood, Chief Investment Officer of the Adviser; Maria Schiopu, CFA, Senior Director and Head of Portfolio Management of the Sub-Adviser; and Jeff Greco, FRM, Senior Director, Head of Strategy Research of the Sub-Adviser.

Purchase and Sale of Shares and Tax Information

For important information about the purchase and sale of Shares, tax information and financial intermediary compensation, please turn to “Summary Information About Purchases and Sales of Fund Shares, Tax Information and Payments to Broker-Dealers and Other Financial Intermediaries” in this prospectus.

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SUMMARY INFORMATION

ARK Q2 Defined Innovation ETF (ARKJ)

Investment Objective

The ARK Q2 Defined Innovation ETF’s (“Fund”) investment objective is capital appreciation with a measure of downside protection.

Fund Fees and Expenses

Shareholder Fees (fees paid directly from your investment) None

Annual Fund Operating Expenses
(expenses that you pay each year as a percentage of the value of your investment)

Management Fee [   ] %

Distribution and/or Service (12b-1) Fees [   ] %

Other Expenses^(a)(b) [   ] %

Acquired Fund Fees and Expenses [   ] %

Total Annual Fund Operating Expenses^(b) [   ] %

Fee Waiver^(c) [   ] %

Total Annual Fund Operating Expenses After Fee Waiver [   ] %

(a)

(b)

Other Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.

(c)

Example

Year	Expenses
1	$	[ ]
3	$	[ ]

Portfolio Turnover

Principal Investment Strategies

The ARK Q2 Defined Innovation ETF (the “Fund”) is an actively-managed exchange-traded fund (“ETF”) that, for rolling 12-month periods from [April] to [April] (each, an “Outcome Period”) seeks to provide investors with a defined risk-return profile, before fees and expenses. Specifically, the Fund is structured to limit downside participation to approximately 50% of any decline in the share price of the ARK Innovation ETF (the “Underlying ETF”), measured from its value at the beginning of each Outcome Period—meaning losses to the Fund’s net asset value (“NAV”) are expected not to exceed 50%, even if the Underlying ETF declines more significantly. At the same time, the Fund is structured to provide maximum participation in the Underlying ETF’s upside above a predefined approximately 5% hurdle rate (the “Hurdle”). The Hurdle is defined as approximately 105% of the Underlying ETF’s share price at the beginning of each Outcome Period, and corresponds to the strike price of the long out-of-the-money call options purchased by the Fund to capture the upside performance beyond that threshold.

Use of Options

To pursue this objective, the Fund employs a structured options strategy:

Use of Option Premiums:

Participation Above the Hurdle

Options Sourcing and Execution

Principal Risks

Performance

Management of the Fund

Investment Adviser. ARK Investment Management LLC.

Sub-Adviser. Milliman Financial Risk Management LLC (the “Sub-Adviser” or “Milliman”).

Purchase and Sale of Shares and Tax Information

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SUMMARY INFORMATION

ARK Q3 Defined Innovation ETF (ARKL)

Investment Objective

The ARK Q3 Defined Innovation ETF’s (“Fund”) investment objective is capital appreciation with a measure of downside protection.

Fund Fees and Expenses

Shareholder Fees (fees paid directly from your investment)	None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	[ ]	%
Distribution and/or Service (12b-1) Fees	[ ]	%
Other Expenses^(a)(b)	[ ]	%
Acquired Fund Fees and Expenses	[ ]	%
Total Annual Fund Operating Expenses^(b)	[ ]	%
Fee Waiver^(c)	[ ]	%
Total Annual Fund Operating Expenses After Fee Waiver	[ ]	%

(a)

(b)

Other Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.

(c)

Example

Year	Expenses
1	$	[ ]
3	$	[ ]

Portfolio Turnover

Principal Investment Strategies

The ARK Q3 Defined Innovation ETF (the “Fund”) is an actively-managed exchange-traded fund (“ETF”) that, for rolling 12-month periods from July to July (each, an “Outcome Period”) seeks to provide investors with a defined risk-return profile, before fees and expenses. Specifically, the Fund is structured to limit downside participation to approximately 50% of any decline in the share price of the ARK Innovation ETF (the “Underlying ETF”), measured from its value at the beginning of each Outcome Period—meaning losses to the Fund’s net asset value (“NAV”) are expected not to exceed 50%, even if the Underlying ETF declines more significantly. At the same time, the Fund is structured to provide maximum participation in the Underlying ETF’s upside above a predefined approximately 5% hurdle rate (the “Hurdle”). The Hurdle is defined as approximately 105% of the Underlying ETF’s share price at the beginning of each Outcome Period, and corresponds to the strike price of the long out-of-the-money call options purchased by the Fund to capture the upside performance beyond that threshold.

Use of Options

To pursue this objective, the Fund employs a structured options strategy:

	3.	Use of Option Premiums:

Participation Above the Hurdle

Options Sourcing and Execution

Principal Risks

Performance

Management of the Fund

Investment Adviser. ARK Investment Management LLC.

Sub-Adviser. Milliman Financial Risk Management LLC (the “Sub-Adviser” or “Milliman”).

Purchase and Sale of Shares and Tax Information

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SUMMARY INFORMATION

ARK Q4 Defined Innovation ETF (ARKM)

Investment Objective

The ARK Q4 Defined Innovation ETF’s (“Fund”) investment objective is capital appreciation with a measure of downside protection.

Fund Fees and Expenses

(a)

(b)

Other Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.

(c)

Example

Year	Expenses
1	$	[ ]
3	$	[ ]

Portfolio Turnover

Principal Investment Strategies

The ARK Q4 Defined Innovation ETF (the “Fund”) is an actively-managed exchange-traded fund (“ETF”) that, for rolling 12-month periods from October to October (each, an “Outcome Period”) seeks to provide investors with a defined risk-return profile, before fees and expenses. Specifically, the Fund is structured to limit downside participation to approximately 50% of any decline in the share price of the ARK Innovation ETF (the “Underlying ETF”), measured from its value at the beginning of each Outcome Period—meaning losses to the Fund’s net asset value (“NAV”) are expected not to exceed 50%, even if the Underlying ETF declines more significantly. At the same time, the Fund is structured to provide maximum participation in the Underlying ETF’s upside above a predefined approximately 5% hurdle rate (the “Hurdle”). The Hurdle is defined as approximately 105% of the Underlying ETF’s share price at the beginning of each Outcome Period, and corresponds to the strike price of the long out-of-the-money call options purchased by the Fund to capture the upside performance beyond that threshold.

Use of Options

To pursue this objective, the Fund employs a structured options strategy:

Use of Option Premiums:

Participation Above the Hurdle

Options Sourcing and Execution

Principal Risks

Performance

Management of the Fund

Investment Adviser. ARK Investment Management LLC.

Sub-Adviser. Milliman Financial Risk Management LLC (the “Sub-Adviser” or “Milliman”).

Purchase and Sale of Shares and Tax Information

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ADDITIONAL INFORMATION ABOUT THE FUNDS’ INVESTMENT STRATEGIES AND RISKS

Investment Objective of the Fund

The Fund’s investment objective is non-fundamental and may be changed by the Board of Trustees (“Board”) of ARK ETF Trust (“Trust”) without shareholder approval. There is no assurance that the Fund will meet its investment objective.

Principal Investment Strategies

Each of the ARK Q1 Defined Innovation ETF, the ARK Q2 Defined Innovation ETF, the ARK Q3 Defined Innovation ETF and the ARK Q4 Defined Innovation ETF (each, a "Fund", and together, the "Funds") is an actively-managed exchange-traded fund (“ETF”) that, for rolling 12-month periods from [January to January, April to April, July to July, and October to October] (each, an “Outcome Period”), respectively, seeks to provide investors with a defined risk-return profile, before fees and expenses. Specifically, the Fund (which, for the remainder of this Prospectus, refers to one or more of the Funds offered in this Prospectus) is structured to limit downside participation to approximately 50% of any decline in the share price of the ARK Innovation ETF (the “Underlying ETF”), measured from its value at the beginning of each Outcome Period—meaning losses to the Fund’s net asset value (“NAV”) are expected not to exceed 50%, even if the Underlying ETF declines more significantly. At the same time, the Fund is structured to provide maximum participation in the Underlying ETF’s upside above a predefined approximately 5% hurdle rate (the “Hurdle”). The Hurdle is defined as approximately 105% of the Underlying ETF’s share price at the beginning of each Outcome Period, and corresponds to the strike price of the long out-of-the-money call options purchased by the Fund to capture the upside performance beyond that threshold.

Use of Options

To pursue this objective, the Fund employs a structured options strategy:

Use of Option Premiums:

Participation Above the Hurdle

Options Sourcing and Execution

Principal Risks

The value of your investment in the Fund, as well as the amount of return you receive on your investment in the Fund, may fluctuate significantly. You may lose part or all of your investment in the Fund or your investment may not perform as well as other similar investments. Therefore, you should consider carefully the following risks before investing in the Fund.

Principal Risks Applicable to All Funds

[Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”) on an agency basis (i.e., on behalf of other market participants). To the extent that those APs exit the business or are unable to process creation and/or redemption orders, and no other AP is able to step forward to create and redeem in either of these cases, Shares may possibly trade at a discount to net asset value (“NAV”).

Cyber Security Risk. As the use of internet technology has become more prevalent in the course of business, funds have become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events from external or internal sources that may cause the Fund to lose proprietary information, suffer data corruption, lose operational capacity, or result in unauthorized access to confidential information. Such events could prevent the Fund from engaging in normal business activities and cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve, among other things, unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, ransomware attaches that impair the Fund’s ability to access its data or systems until a ransom is paid, or denial-of-service attacks that make network services unavailable to intended users. Recently, geopolitical tensions may have increased the scale and sophistication of deliberate attacks, particularly those from nation-states or from entities with nation-state backing. In addition, cyber security breaches of the Fund’s third-party service providers, such as its adviser, administrator, transfer agent or custodian, the Fund’s trading counterparties, and issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. Cyber security breaches experienced by an issuer in which the Fund invests can also impact the value of the Fund’s investment in that issuer. While the Funds have established business continuity plans and risk management systems designed to reduce the risks associated with cyber security, there are inherent limitations in such plans and systems. Additionally, there is no guarantee that such efforts will succeed, especially because the Funds do not directly control the cyber security systems of their third-party service providers, trading counterparties, or issuers.

FLEX Options Risk. The Fund utilizes FLEX Options guaranteed for settlement by the OCC, and they each bear the risk that the OCC will be unable or unwilling to fulfill its obligations under the FLEX Options contracts, which is a form of counterparty risk. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In a less liquid market, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. Terminating the FLEX Options in a less liquid market may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, in such a market, the liquidation of a large number of options may significantly impact the price. The Fund may experience substantial downside from certain FLEX Option positions, and FLEX Option positions may expire worthless.

The value of the FLEX Options will be affected by, among others, changes in the value of the Underlying ETF, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time until the FLEX Options expire. During periods of reduced market liquidity or in the absence of readily available market quotations, or when there is reduced availability of reliable objective pricing data for the FLEX Options, the ability of the Fund to value the FLEX Options may become more difficult. The value of the FLEX Options does not increase or decrease at the same rate as the level of the Underlying ETF (although they generally move in the same direction). Prior to the expiration date, the value of the FLEX Options will be determined based upon the Fund’s valuation policy. Because a component of the FLEX Option’s value will be affected by, among other things, changes in the value of the Underlying ETF, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time until the FLEX Options expire, the value of the Fund’s FLEX Options positions is not anticipated to increase or decrease at the same rate as the Underlying ETF, and it is possible they may move in different directions. As a result, the Fund’s NAV may not increase or decrease at the same rate as the Underlying ETF. Similarly, the components of the option’s value are anticipated to impact the effect of the Buffer on the Fund’s NAV, which may not be in full effect prior to the end of the Outcome Period. The Fund’s strategy is designed to produce the outcomes upon the expiration of the FLEX Options on the last business day of the Outcome Period, and it should not be expected that the outcomes will be provided at any point other than the end of the Outcome Period.

Liquidity Risk. The Fund may invest in securities or instruments that trade in lower volumes, that are less liquid than other investments and/or that may become illiquid or less liquid in response to market developments or adverse investor perceptions. Investments that are illiquid or that trade in lower volumes may be more difficult to value. When there is no willing buyer and investments cannot be readily sold at the desired time or price, the Fund may have to accept a lower price or may not be able to sell the security or instrument at all. An inability to sell one or more portfolio positions can adversely affect the Fund’s value.

Illiquidity can be caused by a drop in overall market trading volume, an inability to find a willing buyer, or legal restrictions on the securities’ resale. Additionally, the secondary market for ELNs may be limited, affecting their liquidity and valuation. To the extent the Fund engages in cash redemptions, then liquidity risk may also refer to the risk that the Fund will not be able to pay redemption proceeds within the allowable time period or without significant dilution to remaining investors’ interests because of unusual market conditions, an unusually high volume of redemption requests, a redemption request by a large shareholder (such as a seed investor) or other reasons. If the Fund is forced to sell securities at an unfavorable time and/or under unfavorable conditions, such sales may adversely affect the Fund’s NAV and dilute remaining investors’ interests.

Liquidity Risk — Listed Options. There is no guarantee that a liquid secondary trading market will exist for the listed options in which the Fund may invest. The trading in Listed Options may be less deep and liquid than the market for certain other exchange traded option contracts. In a less liquid market for the Listed Options terminating the Listed Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of Listed Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its Listed Option positions. A less liquid trading market may adversely impact the value of the Listed Options and the value of your investment.

Position Limits Risk. The options exchanges have established limits on the maximum number of puts and calls covering the same underlying security that may be held or written by a single investor or group of investors acting in concert or under common control (regardless of whether the options are purchased or written on the same or different exchanges or are held or written in one or more accounts or through one or more brokers). These are referred to as "position limits." The position limit applicable to a particular option class is determined by the options exchange based on the number of shares outstanding and trading volume of the security underlying the option. The rules of the options markets generally limit the maximum number of options on the same side of the market (i.e., calls held plus puts written, or puts held plus calls written) with respect to a single underlying interest that may be carried in the accounts of a single investor or group of investors acting in concert. An options market may require that positions in certain Listed Options or FLEX Options be aggregated with positions in certain other options for purposes of calculating position limits.

Management Risk. As actively-managed ETFs, the Funds are subject to management risk. In managing the Funds, the Adviser applies investment strategies, techniques and analyses in making investment decisions for the Funds, but there can be no guarantee that these actions will produce the intended results. The ability of the Adviser to successfully implement the Fund’s investment strategies will significantly influence the Fund’s performance. The success of the Fund will depend in part upon the skill and expertise of certain key personnel of the Adviser, and there can be no assurance that any such personnel will continue to be associated with the Fund.

Market Trading Risk. The Fund faces numerous market trading risks, including disruptions to the creation and redemption processes of the Fund, losses from trading in secondary markets, the existence of extreme market volatility, the potential lack of an active trading market for Shares due to market stress, or trading halts impacting the Shares or the Fund’s underlying securities, which may result in Shares trading at a significant premium or discount to their NAV. The NAV of Shares will fluctuate with changes in the market value of the Fund’s securities holdings. The market prices of Shares will fluctuate in accordance with changes in their NAV and supply and demand on an Exchange. The Adviser cannot predict whether Shares will trade below, at or above their NAV. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the securities in the Fund’s portfolio trading individually or in the aggregate at any point in time. If a shareholder purchases Shares at a time when the market price is at a premium to the NAV or sells Shares at a time when the market price is at a discount to the NAV, the shareholder may pay more for, or receive less than, the underlying value of the Shares, respectively. Any of these factors, discussed above and further below, may lead to Shares trading at a premium or discount to the Fund’s NAV.

While Shares are listed on an exchange, there can be no assurance that an active trading market for the Shares will be maintained. Further, secondary markets may be subject to irregular trading activity, wide bid/ask spreads and extended trade settlement periods in times of market stress because market makers and APs may step away from making a market in the Shares and in executing creation and redemption orders, which could cause a material deviation in the Fund’s market price from its NAV. The Funds’ distributor does not maintain a secondary market in the Shares. Investors purchasing and selling shares in the secondary market may not experience investment results consistent with those experienced by those APs creating and redeeming directly with the Fund.

Decisions by market makers or APs to reduce their role or “step away” from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying value of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Fund Shares trading at a price which differs materially from NAV and also in greater than normal intraday bid/ask spreads for Fund Shares.

Outcome Period Risk. The Fund’s investment strategy is designed to deliver returns that match the Underlying ETF, subject to the Hurdle, only if shares are bought by the first day of the Outcome Period and held until the end of the Outcome Period. If an investor purchases or sells shares during the Outcome Period, the returns realized by the investor will not match those that the Fund seeks to achieve. Moreover, the Fund’s returns will be reduced by Fund fees and expenses as well as any brokerage commissions, trading fees, taxes and non-routine or extraordinary expenses incurred by the Fund throughout an Outcome Period. Accordingly, the maximum performance of the Fund over an Outcome Period will be reduced by these fees and expenses.

Sector Risk. The Fund and each Underlying ETP may, from time to time, invest more heavily in companies in a particular economic sector or sectors. Economic or regulatory changes adversely affecting such sectors may have more of an impact on the Fund’s performance than if the Fund or an Underlying ETP held a broader range of investments.

Tracking Error Risk. Tracking error is the divergence of the Fund’s performance without regard to the Hurdle from that of the Underlying ETF. The performance of the Fund may diverge from that of the Underlying ETF for a number of reasons. Tracking error may occur because of transaction costs, the Fund’s holding of cash, differences in accrual of dividends, changes to the Underlying ETF or the need to meet new or existing regulatory requirements. Unlike the Funds, the returns of the Underlying ETF are not reduced by investment and other operating expenses, including the trading costs associated with implementing changes to its portfolio of investments. Tracking error risk may be heightened during times of market volatility or other unusual market conditions.

Option Writing Risk. The Funds invest in options that derive their performance from the performance of the Underlying ETF or Spot Bitcoin, as applicable. Writing and buying options are speculative activities and entail investment exposures that are greater than their cost would suggest, meaning that a small investment in an option could have a substantial impact on the performance of the Fund. The Fund’s use of call and put options can lead to losses because of adverse movements in the price or value of the underlying stock, index, or other asset, which may be magnified by certain features of the options. These risks are heightened when the Fund’s portfolio managers use options to enhance the Fund’s return or as a substitute for a position or security. When selling a call or put option, the Fund will receive a premium; however, this premium may not be enough to offset a loss incurred by the Fund if the price of the underlying asset is above or below, respectively, the strike price by an amount equal to or greater than the premium. The value of an option may be adversely affected if the market for the option becomes less liquid or smaller, and will be affected by changes in the value or yield of the option’s underlying asset, an increase in interest rates, a change in the actual or perceived volatility of the stock market or the underlying asset and the remaining time to expiration. Additionally, the value of an option does not increase or decrease at the same rate as the underlying asset(s). The Fund’s use of options, due to the cost of the options, will reduce the Fund’s ability to get returns equal to the Underlying ETF or Spot Bitcoin, as applicable. This means that if the Underlying ETF or Spot Bitcoin, as applicable, experiences gains for an Outcome Period, the Fund will not benefit to the same extent from those gains. In addition, if the price of the underlying asset of an option is above the strike price of a written call option or below the strike price for a written put option, the value of the option, and consequently of the Fund, may decline significantly more than if the Fund invested directly in the underlying asset instead of using options. The Fund invests in options that derive their performance from the performance of the Underlying ETF or Spot Bitcoin, as applicable, and can be volatile and involve various types and degrees of risks. The Fund could experience a loss if its options do not perform as anticipated, or are not correlated with the performance of their underlying stock or if the Fund is unable to purchase or liquidate a position because of an illiquid secondary market.]

[Investment Objective and Outcomes Risk. There is no guarantee that the Fund will succeed in its attempt to achieve its investment objective and/or its strategy to limit the Fund's exposure to losses in the Underlying ETF’s share price to no more than 50% of the Fund’s NAV during the Outcome Period. An investor could lose some or all of their investment in the Fund. Circumstances under which the Fund might not achieve its objective and/or its strategy to limit the Fund's exposure to losses in the Underlying ETF’s share price to no more than 50% of the Fund’s NAV during the Outcome Period include, but are not limited to: (i) if the Fund disposes of FLEX Options; (ii) if the Fund is unable to maintain the intended proportional relationship based on the number of FLEX Options in the Fund’s portfolio; (iii) significant accrual of Fund expenses in connection with effecting the Fund’s investment strategy; (iv) losses resulting from the Fund’s investment strategy; or (v) adverse tax law changes affecting the treatment of FLEX Options.

Leverage Risk. To the extent that the Fund borrows money, it may be leveraged. Additionally, certain transactions in which the Fund is permitted to engage may present leverage risk. Leveraging generally exaggerates the effect on NAV of any increase or decrease in the market value of the Fund’s portfolio securities. Leveraging may cause the Fund to liquidate portfolio positions to satisfy its obligations or to meet segregation requirements when it may not be advantageous to do so. Leveraging, including borrowing, may cause the Fund to be more volatile than if the Fund had not been leveraged.

Concentration Risk. The assets of the Fund and the Underlying Fund will be concentrated in securities of issuers having their principal business activities in a sector or sectors or an industry or group of industries. To the extent that these Funds or the Underlying Fund continue to be concentrated in securities of issuers that have their principal business activities in a sector or sectors or in an industry or group of industries, each will be subject to the risk that economic, political or other conditions that have a negative effect on that sector or sectors or industry or group of industries will negatively impact them to a greater extent than if their assets were invested in a wider variety of sectors or industries.

Other Investment Companies Risk. In addition to investing in options, the Fund invests in the Underlying ETF, which is another investment company. Accordingly, shareholders will bear not only their proportionate share of the Fund’s expenses, but also, indirectly, the similar expenses of the Underlying ETF. Shareholders would also be exposed to the risks associated not only with the Fund, but also with the portfolio investments of the Underlying ETF. The underlying securities in the Underlying ETF may not follow the price movements of the industry or sector the Underlying ETF is designed to track. Trading in the Underlying ETF may be halted if the trading in one or more of the Underlying ETF’s underlying securities is halted, which could result in the Underlying ETF being more volatile.]

Additional Risks

[Rights and Warrants Risk. Rights and warrants are option securities permitting their holders to subscribe for other securities. Rights and warrants do not represent an ownership interest in an issuer or carry with them dividend or voting rights with respect to the underlying securities. Investment in rights and warrants may thus be considered more speculative than certain other types of investments. In addition, the value of a right or a warrant does not necessarily change with the value of the underlying securities, and ceases to have value if it is not exercised prior to expiration.]

[Temporary Defensive Strategy Risk. When the Fund pursues a temporary defensive strategy inconsistent with its principal investment strategies, it may not achieve its investment objective.]

Portfolio Holdings

A description of the Funds’ policies and procedures with respect to the disclosure of the Funds’ portfolio securities is available in the Funds’ Statement of Additional Information (“SAI”).

MANAGEMENT OF THE FUNDS

Investment Adviser. ARK Investment Management LLC, located at 200 Central Avenue, Suite 220, St. Petersburg, Florida 33701, serves as the Funds’ investment adviser. The Adviser registered with the SEC in January 2014. Under the terms of an investment advisory agreement between the Trust and the Adviser with respect to the Fund (“Advisory Agreement”), the Adviser serves as the adviser to the Fund, subject to the general supervision of the Board, and is responsible for the day-to-day investment management of the Fund.

The Adviser’s duties as adviser to the Fund include furnishing a continuous investment program for the Funds and determining what investments or securities will be purchased, held or sold.

Pursuant to a supervision agreement between the Trust and the Adviser with respect to the Fund (“Supervision Agreement”), and subject to the general supervision of the Board, the Adviser provides or causes to be furnished, all supervisory and other services reasonably necessary for the operation of the Fund and also bears the costs of various third-party services required by the Funds, including administration, certain custody, audit, legal, transfer agency, and printing costs. The Supervision Agreement also requires the Adviser to provide investment advisory services to the Funds pursuant to the Advisory Agreement.

The Fund pays the Adviser a fee (“Management Fee”) in return for providing investment advisory and supervisory services under a comprehensive structure. The Fund will pay a monthly Management Fee to the Adviser at an annual rate (stated as a percentage of the average daily net assets of the Fund) as follows:

Fund	Management Fee
ARK Q1 Defined Innovation ETF	[ ]	%
ARK Q2 Defined Innovation ETF	[ ]	%
ARK Q3 Defined Innovation ETF	[ ]	%
ARK Q4 Defined Innovation ETF	[ ]	%

In addition, the Fund bears other fees and expenses that are not covered by the Supervision Agreement, which may vary and will affect the total expense ratio of the Fund, such as acquired fund fees and expenses, taxes and governmental fees, brokerage fees, commissions and other transaction expenses, certain foreign custodial fees and expenses, costs of borrowing money, including interest expenses, and extraordinary expenses (such as litigation and indemnification expenses).

The Adviser has voluntarily agreed to waive a portion of its management fee payable by the Fund in an amount equal to any management fees it earns as an investment adviser to the affiliated fund(s) in which the Fund invests. The fee waiver arrangement will continue for at least one year from the date of this Prospectus and, prior to such date, the Adviser may not terminate the arrangements without the approval of the Board of Trustees. The management fee waiver may be modified or terminated by the Adviser at its discretion and without shareholder approval after such date, although the Adviser does not presently intend to do so.

In addition to the management fee waiver described above, the Investment Adviser may waive an additional portion of its management fee, from time to time, and may discontinue or modify any such waivers in the future, consistent with the terms of any fee waiver arrangements that may be in place at such time.

A discussion regarding the Board’s approval of the Advisory Agreement and Sub-Advisory Agreement with respect to the Fund will be available in the Trust’s Form N-CSR for the Fund after commencement of operations for the fiscal year ended July 31.

Sub-Adviser:

Milliman. Milliman Financial Risk Management LLC, a Delaware limited liability company located at 71 S. Wacker Dr., 31st Floor, Chicago, IL 60606, serves as the Sub-Adviser for the Fund. Milliman, subject to the oversight of the Board, provides an investment management program for the Fund and manages the day-to-day investment of the Funds’ assets. Milliman also arranges for transfer agency, custody, fund administration, distribution and all other services necessary for the Fund to operate. An SEC-registered investment adviser since 2011, Milliman is a wholly-owned subsidiary of Milliman, Inc.

Administrator, Custodian and Transfer Agent. The Bank of New York Mellon is the administrator for the Funds (“Administrator”), is the custodian of the Funds’ assets and provides transfer agency, fund accounting and various administrative services to the Funds. The Administrator is responsible for providing certain operational, clerical, recordkeeping and/or bookkeeping services for the Funds.

Distributor. Foreside Fund Services, LLC is the distributor of the Shares of the Funds. The Distributor will not distribute Shares in less than Creation Units, and does not maintain a secondary market in Shares. The Shares are expected to be traded in the secondary market.

Portfolio Managers. Catherine D. Wood serves as Chief Investment Officer of the Adviser and Portfolio Manager of the Funds. Having completed 12 years at AllianceBernstein LP, Ms. Wood founded ARK Investment Management LLC and registered the firm with the SEC in January 2014. At AllianceBernstein LP, Ms. Wood was Chief Investment Officer of Global Thematic Strategies, with $5 billion in assets under management. Ms. Wood joined Alliance Capital in 2001 from Tupelo Capital Management. Prior to that, Ms. Wood worked for 18 years with Jennison Associates as Chief Economist, Equity Research Analyst, Portfolio Manager and Director. Ms. Wood received her B.S., summa cum laude, in Finance and Economics from the University of Southern California in 1981.

Maria Schiopu, CFA, serves as portfolio manager for the Funds. Ms. Schiopu joined Milliman in 2013 and is Senior Director - Head of Portfolio Management with Milliman. Ms. Schiopu holds a B.A. in Mathematics from Northwestern University. She is a Chartered Financial Analyst (CFA) Charterholder.

Jeff Greco, FRM, serves as a portfolio manager for the Funds. Mr. Greco joined Milliman in 2012 and is Senior Director - Head of Strategy Research with Milliman. Prior to joining Milliman, Mr. Greco was a risk management professional at Citadel LLC. He also serves as an adjunct professor for the University of Chicago’s Financial Mathematics graduate program. Mr. Greco holds a B.S. and M.S. in mathematics from Carnegie Mellon University and a M.S. in applied mathematics from the University of Chicago.

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

SHAREHOLDER INFORMATION

Pricing of Fund Shares

The NAV per Share for the Fund is computed by dividing the value of the net assets of the Fund (i.e., the value of its total assets less total liabilities) by the total number of Shares outstanding. Expenses and fees, including the Management Fee, are accrued daily and taken into account for purposes of determining NAV. The NAV of the Fund is determined each business day as of the close of trading (ordinarily 4:00 p.m., Eastern time) on the NYSE. Any assets or liabilities denominated in currencies other than the U.S. dollar are converted into U.S. dollars at the current market rates on the date of valuation as quoted by one or more sources.

The values of the Fund’s portfolio securities that have readily available market quotations will be based on market prices. A market quotation is readily available only when that quotation is a quoted price (unadjusted) in active markets for identical investments that the Fund can access at the measurement date, provided that a quotation will not be readily available if it is not reliable. Price information on listed securities will be taken from the exchange where the security is primarily traded. With respect to portfolio securities that do not have readily available market quotations, or where such market quotations are not reliable, and with respect to portfolio instruments that are not securities, the Board has designated the Adviser as valuation designee (“Valuation Designee”) pursuant to Rule 2a-5(b) to perform the fair value determination relating to all such Fund investments. In its role as Valuation Designee, the Adviser is responsible for, among other things, carrying out the functions and Board reporting obligations set forth in Rule 2a-5.

As a general principle, the fair value of a security or other asset is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. If the Valuation Designee Determines that fair valuation would be appropriate and would result in a measurement that is equally or more representative of fair value or is required, the Valuation Designee may value the security or asset based on its consideration of one or more of a proscribed set of factors, to the extent relevant and available under the circumstance. The Valuation Designee’s policies and procedures govern the Valuation Designee’s selection and application of methodologies for determining and calculating the fair value of Fund investments. Fair value pricing involves subjective judgments, and it is possible that a fair value determination for a security may be materially different than the value that could be realized upon the sale of the security.

In considering whether fair valuation is required and in determining fair values, the Valuation Designee may, among other things, consider significant events( which may be considered to include changes in the value of U.S. securities or securities indexes) that occur after the close of the relevant market and before the NYSE Close. A significant event is an event that will, with a reasonably high probability, materially affect the value of a security since the closing price of the security was established on an exchange or market, but before the Fund’s NAV calculation. Significant events may relate to a single issuer, multiple issuers or to an entire market sector. Significant events generally would be those that are readily ascertainable in the ordinary course of business.

The Valuation Designee may also utilize one or more Pricing Services to assist in determining a fair value for a security or asset, and may obtain the assistance of others, including, without limitation, the Funds’ accounting agent and an outside independent pricing services in fulfilling its responsibilities. Prices obtained by an outside independent pricing service will use information provided by market makers or estimates of market values obtained from data related to investments or securities with similar characteristics. For assets such as exchange-traded options, the Funds will determine market values based upon quotations from exchanges and/or market makers.

Buying and Selling Shares

The Shares of the Funds have been approved for listing on the [ ], as applicable. If you buy or sell Shares in the secondary market, you will incur customary brokerage commissions and charges and may pay some or all of the spread between the bid and the offered price in the secondary market on each leg of a round trip (purchase and sale) transaction. In times of severe market disruption or low trading volume in the Fund’s Shares, this spread can increase significantly. It is anticipated that Shares will trade in the secondary market at prices that may differ to varying degrees from the NAV of Shares. During periods of disruptions to creations and redemptions or the existence of extreme market volatility, the market prices of Shares are more likely to differ significantly from Shares’ NAV.

The Depository Trust Company (“DTC”) serves as securities depository for Shares. The Shares may be held only in book-entry form; stock certificates will not be issued. DTC, or its nominee, is the record or registered owner of all outstanding Shares. Beneficial ownership of Shares will be shown on the records of DTC or its participants. Beneficial owners of Shares are not considered the registered holder thereof and are subject to the same restrictions and procedures as any beneficial owner of stocks held in book-entry or “street name” form. For more information, see the section entitled “Book Entry Only System” in the Funds’ SAI.

The [Exchanges are] open for trading Monday through Friday and are closed on weekends and the following holidays: New Year’s Day, Martin Luther King, Jr. Day, Presidents’ Day, Good Friday, Memorial Day, Juneteenth National Independence Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day. Because non-U.S. exchanges may be open on days when the Fund does not price its Shares, the value of the securities in the Fund’s portfolio may change on days when shareholders will not be able to purchase or sell the Fund’s Shares.

Distribution and Service Plan

The Board has adopted a distribution and service plan (“Plan”) pursuant to Rule 12b-1 under the 1940 Act. Under the Plan, the Funds are authorized to pay distribution fees in connection with the sale and distribution of their Shares and pay service fees in connection with the provision of ongoing services to shareholders.

No Rule 12b-1 fees are currently paid by any Fund, and there are no current plans to impose these fees. In addition, no such fees may be paid in the future without further approval by the Board. However, in the event Rule 12b-1 fees are charged in the future, because these fees are paid out of the Fund’s assets on an ongoing basis, these fees will increase the cost of your investment in the Fund. By purchasing shares subject to distribution and service fees, you may pay more over time than you would by purchasing shares with other types of sales charge arrangements. Long-term shareholders may pay more than the economic equivalent of the maximum front-end sales charge permitted by the rules of the Financial Industry Regulatory Authority. The net income attributable to the shares of the Fund will be reduced by the amount of distribution and service fees and other expenses of the Fund.

Dividends and Distributions

The Fund intends to qualify each year as a regulated investment company under the Internal Revenue Code. As a regulated investment company, the Fund generally pays no federal income tax on the income and gains it distributes. Each shareholder of the Fund is entitled to its share of the Fund’s distributions of net investment income and net realized capital gains on its investments. The Fund pays out substantially all of its net earnings to its shareholders as “distributions.”

the Fund typically earns income dividends from stocks and interest from debt securities. These amounts, net of expenses, are typically passed along to Fund shareholders as dividends from net investment income. The Fund realizes capital gains or losses whenever it sells securities. Net realized capital gains are distributed to shareholders as “capital gain distributions.” Distributions from the Fund’s net investment income, including net short-term capital gains, if any, are taxable to shareholders as ordinary income. Any long-term capital gains distributions a shareholder receives from the Fund are taxable as long-term capital gain.

Net investment income, if any, and net capital gains, if any, are typically distributed to shareholders at least annually. Dividends may be declared and paid more frequently to improve index tracking or to comply with the distribution requirements of the Internal Revenue Code. In addition, the Fund may determine to distribute at least annually amounts representing the full dividend yield net of expenses on the underlying investment securities, as if the Fund owned the underlying investment securities for the entire dividend period. If the Fund so elects, some portion of each distribution may result in a return of capital, which, for tax purposes, is treated as a return of a shareholder’s investment in Shares.

Distributions in cash may be reinvested automatically in additional Shares of the Fund only if the broker through whom you purchased Shares makes such option available.

Each year, you will receive an annual statement (Form 1099) of your account activity to assist you in completing your federal, state and local tax returns. Distributions declared in December to shareholders of record in such month, but paid in January, are taxable as if they were paid in December. The Fund makes every effort to search for reclassified income to reduce the number of corrected forms mailed to you. However, when necessary, you will receive a corrected Form 1099 to reflect reclassified information.

At the time you purchase your Fund Shares, the price of Shares may reflect undistributed income, undistributed capital gains, or net unrealized appreciation in value of portfolio securities held by the Fund. For taxable investors, a subsequent distribution to you of such amounts, although constituting a return of your investment, would be taxable. Buying Shares in the Fund just before it declares an income dividend or capital gains distribution is sometimes known as “buying a dividend.”

[Tax Consequences]

General. As with any investment, you should consider how your Fund investment will be taxed. The tax information in this prospectus is provided as general information. You should consult your own tax professional about the tax consequences of an investment in the Fund, including the possible application of foreign, state and local taxes. Unless your investment in the Fund is through a tax-exempt entity or tax-deferred retirement account, such as a 401(k) plan, you need to be aware of the possible tax consequences when: (i) the Fund makes distributions, (ii) you sell Shares in the secondary market or (iii) you create or redeem Creation Units.

Taxes on Distributions. As noted above, the Fund expects to distribute net investment income, if any, at least annually, and any net realized long-term or short-term capital gains, if any, annually. The Fund may also pay a special distribution at any time to comply with U.S. federal tax requirements.

Distributions from the Fund’s net investment income, including any net short-term gains, are generally taxable to you as ordinary income. In general, your distributions are subject to U.S. federal income tax when they are paid, whether you take them in cash or reinvest them in the Fund. Whether distributions of capital gains represent long-term or short-term capital gains is determined by how long the Fund owned the investments that generated them, rather than how long you have owned your Shares. Distributions of net short-term capital gains in excess of net long-term capital losses, if any, are generally taxable as ordinary income. Distributions of net long-term capital gains in excess of net short-term capital losses, if any, that are properly reported as capital gain dividends are generally taxable as long-term capital gains. Long-term capital gains of non-corporate shareholders are generally taxable at a maximum rate of 15% or 20%, depending on whether the shareholder’s income exceeds certain threshold amounts.

Distributions in excess of the Fund’s current and accumulated earnings and profits are treated as a tax-free return of your investment to the extent of your basis in Shares, and generally as capital gain thereafter. A return of capital, which for tax purposes is treated as a return of your investment, reduces your basis in Shares, thus reducing any loss or increasing any gain on a subsequent taxable disposition of Shares. A distribution will reduce the Fund’s NAV per Share and may be taxable to you as ordinary income or capital gain even though, from an economic standpoint, the distribution may constitute a return of capital.

The use of derivatives by the Fund may cause the Fund to realize higher amounts of ordinary income or short-term capital gain, distributions from which are taxable to individual shareholders at ordinary income tax rates rather than at the more favorable tax rates for long-term capital gain.

Dividends, interest and gains from non-U.S. investments of the Fund may give rise to withholding and other taxes imposed by foreign countries. Tax conventions between certain countries and the United States may, in some cases, reduce or eliminate such taxes.

Non-U.S. Investors. Non-U.S. investors may be subject to U.S. withholding tax at a 30% or lower treaty rate and U.S. estate tax and are subject to special U.S. tax certification requirements to avoid backup withholding and claim any treaty benefits. Exemptions from U.S. withholding tax are provided for certain capital gain dividends paid by the Fund from net long-term capital gains, interest-related dividends and short-term capital gain dividends, if such amounts are reported by the Fund. However, notwithstanding such exemptions from U.S. withholding at the source, any such dividends and distributions of income and capital gains will be subject to backup withholding at a rate of 24% if you fail to properly certify that you are not a U.S. person.

Under the Foreign Account Tax Compliance Act (“FATCA”), a 30% withholding tax on income dividends paid by the Fund to certain foreign entities, referred to as foreign financial institutions or nonfinancial foreign entities, that fail to comply (or be deemed compliant) with extensive reporting and withholding requirements designed to inform the U.S. Department of the Treasury of U.S.-owned foreign investment accounts. Information about a shareholder in the Fund may be disclosed to the Internal Revenue Service, non-U.S. taxing authorities or other parties as necessary to comply with FATCA or similar laws. Withholding also may be required if a foreign entity that is a shareholder of the Fund fails to provide appropriate certifications or other documentation concerning its status under FATCA.

Non-U.S. shareholders are advised to consult their tax advisors with respect to the particular tax consequences to them of an investment in the Funds, including the possible applicability of the U.S. estate tax.

Backup Withholding. The Fund may be required to withhold a percentage of your distributions and proceeds if you have not provided a taxpayer identification number or social security number or otherwise established a basis for exemption from backup withholding. The backup withholding rate for individuals is currently 24%. This is not an additional tax and may be refunded, or credited against your U.S. federal income tax liability, provided certain required information is furnished to the Internal Revenue Service.

Taxes on the Sale or Cash Redemption of Exchange Listed Shares. Currently, any capital gain or loss realized upon a sale of Shares is generally treated as long-term capital gain or loss if Shares have been held for more than one year and as a short-term capital gain or loss if held for one year or less. However, any capital loss on a sale of Shares held for six months or less is treated as long-term capital loss to the extent that capital gain dividends were paid with respect to such Shares. The ability to deduct capital losses may be limited. To the extent that the Fund shareholder’s Shares are redeemed for cash, this is normally treated as a sale for tax purposes.

Your financial intermediary will be required to report to you and the Internal Revenue Service annually on Form 1099-B not only the gross proceeds of Shares you sell or redeem but also their cost basis. You should consult with your tax advisors to determine the appropriate cost basis method for your tax situation and to obtain more information about the cost basis reporting rules.

Taxes on Creations and Redemptions of Creation Units. A person who exchanges securities for Creation Units generally will recognize a gain or loss. The gain or loss will be equal to the difference between the market value of the Creation Units at the time of exchange and the sum of the exchanger’s aggregate basis in the securities surrendered and the amount of any cash paid for such Creation Units. A person who exchanges Creation Units for securities will generally recognize a gain or loss equal to the difference between the exchanger’s basis in the Creation Units and the sum of the aggregate market value of the securities received. The Internal Revenue Service, however, may assert that a loss realized upon an exchange of primarily securities for Creation Units cannot be deducted currently under the rules governing “wash sales,” or on the basis that there has been no significant change in economic position. Persons exchanging securities for Creation Units or redeeming Creation Units should consult their own tax advisor with respect to whether wash sale rules apply and when a loss might be deductible and the tax treatment of any creation or redemption transaction.

Under current U.S. federal income tax laws, any capital gain or loss realized upon a redemption (or creation) of Creation Units is generally treated as long-term capital gain or loss if Shares (or securities surrendered) have been held for more than one year and as a short-term capital gain or loss if Shares (or securities surrendered) have been held for one year or less.

If you create or redeem Creation Units, you will be sent a confirmation statement showing how many Shares you created or sold and at what price.

Medicare Tax. An additional 3.8% Medicare tax will be imposed on certain net investment income (including ordinary dividends and capital gain distributions received from the Fund and net gains from redemptions or other taxable dispositions of Fund Shares) of U.S. individuals, estates and trusts to the extent that such person’s “modified adjusted gross income” (in the case of an individual) or “adjusted gross income” (in the case of an estate or trust) exceeds certain threshold amounts.

The foregoing discussion summarizes some of the consequences under current U.S. federal income tax law of an investment in the Fund. It is not a substitute for personal tax advice. Consult your own tax advisor about the potential tax consequences of an investment in the Fund under all applicable tax laws.

Frequent Purchases and Redemptions of Fund Shares

The Board has evaluated the risks of frequent purchases and redemptions of Fund shares (“market timing”) activities by the Fund’s shareholders. The Board noted that Shares can only be purchased and redeemed directly from the Fund in Creation Units by APs and that the vast majority of trading in Shares occurs on the secondary market. Because the secondary market trades do not involve the Fund directly, it is unlikely those trades would cause many of the harmful effects of market timing, including dilution, disruption of portfolio management, increases in the Fund’s trading costs and the realization of capital gains.

With respect to trades directly with the Fund, to the extent effected in-kind, those trades do not cause any of the harmful effects (as previously noted) that may result from frequent cash trades. To the extent that the Trust allows or requires trades to be effected in whole or in part in cash, the Board noted that those trades could result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective. However, the Board noted that direct trading by APs is critical to ensuring that Shares trade at or close to NAV. The Fund also employs fair valuation pricing to minimize potential dilution from market timing. The Fund imposes transaction fees on in-kind purchases and redemptions of Shares to cover the custodial and other costs incurred by the Fund in effecting in-kind trades. These fees increase if an investor substitutes cash in part or in whole for securities, reflecting the fact that the Fund’s trading costs increase in those circumstances. Given this structure, the Board determined that it is not necessary to adopt policies and procedures to detect and deter market timing of Shares.

TAX-ADVANTAGED PRODUCT STRUCTURE

Unlike many conventional mutual funds which are only bought and sold at closing NAVs, Shares of the Fund have been designed to be tradable in a secondary market on an intra-day basis and to be created and redeemed principally or partially in-kind in Creation Units at each day’s market close. These in-kind arrangements are designed to mitigate adverse effects on the Fund’s portfolio that could arise from frequent cash purchase and redemption transactions that affect the NAV of the Fund. Moreover, in contrast to conventional mutual funds, where frequent redemptions can have an adverse tax impact on taxable shareholders because of the need to sell portfolio securities which, in turn, may generate taxable gain, the in-kind redemption mechanism of the Fund, to the extent used, generally is not expected to lead to a tax event for the Fund or its ongoing shareholders.

FINANCIAL HIGHLIGHTS

As of the date of this prospectus, the Funds had not yet commenced operations and, therefore, do not have financial information to report.

PREMIUM/DISCOUNT INFORMATION

As of the date of this prospectus, the Funds had not yet commenced operations and, therefore, do not have information about the differences between the Fund’s daily market price on the Exchange and its NAV. Information regarding how often the Fund’s Shares traded on the Exchange at a price above (i.e., at a premium) or below (i.e., at a discount) the Fund’s NAV during the most recently completed calendar year and the most recently completed calendar quarter(s) since that year (or, if shorter, the period during which the Fund has been in operation), when available, can be found at http://ark-funds.com.

GENERAL INFORMATION

Continuous Offering

The method by which Creation Units are created and traded may raise certain issues under applicable securities laws. Because new Creation Units are issued and sold by the Trust on an ongoing basis, at any point a “distribution,” as such term is used in the Securities Act of 1933, as amended (“Securities Act”), may occur. Broker-dealers and other persons are cautioned that some activities on their part may, depending on the circumstances, result in their being deemed participants in a distribution in a manner which could render them statutory underwriters and subject them to the prospectus delivery and liability provisions of the Securities Act.

For example, a broker-dealer firm or its client may be deemed a statutory underwriter if it takes Creation Units after placing an order with the Distributor, breaks them down into constituent Shares, and sells such Shares directly to customers, or if it chooses to couple the creation of a supply of new Shares with an active selling effort involving solicitation of secondary market demand for Shares. A determination of whether a broker-dealer is an underwriter for purposes of the Securities Act must take into account all the facts and circumstances pertaining to the activities of the broker-dealer or its client in the particular case, and the examples mentioned above should not be considered a complete description of all the activities that could lead to a categorization as an underwriter.

Broker-dealers who are not “underwriters” but are participating in a distribution (as contrasted to ordinary secondary trading transactions), and thus dealing with Shares that are part of an “unsold allotment” within the meaning of Section 4(a)(3)(C) of the Securities Act, would be unable to take advantage of the prospectus delivery exemption provided by Section 4(a)(3) of the Securities Act. This is because the prospectus delivery exemption in Section 4(a)(3) of the Securities Act is not available in respect of such transactions as a result of Section 24(d) of the 1940 Act. As a result, broker-dealer firms should note that dealers who are not underwriters but are participating in a distribution (as contrasted with ordinary secondary market transactions) and thus dealing with the Shares that are part of an overallotment within the meaning of Section 4(a)(3)(A) of the Securities Act would be unable to take advantage of the prospectus delivery exemption provided by Section 4(a)(3) of the Securities Act. Firms that incur a prospectus delivery obligation with respect to Shares are reminded that, under Rule 153 of the Securities Act, a prospectus delivery obligation under Section 5(b)(2) of the Securities Act owed to an Exchange member in connection with a sale on either Exchange is satisfied by the fact that the prospectus is available at each Exchange upon request. The prospectus delivery mechanism provided in Rule 153 is only available with respect to transactions on an Exchange.

In addition, certain affiliates of the Funds and the Adviser may purchase and resell Fund Shares pursuant to this prospectus.

Other Information

The Trust was organized as a Delaware statutory trust on June 7, 2013. Its Declaration of Trust currently permits the Trust to issue an unlimited number of Shares of beneficial interest. If shareholders are required to vote on any matters, each Share outstanding would be entitled to one vote. Annual meetings of shareholders will not be held except as required by the 1940 Act and other applicable law. See the Funds’ SAI for more information concerning the Trust’s form of organization.

Section 12(d)(1) of the 1940 Act restricts investments by investment companies in the securities of other investment companies, including Shares of the Funds. Registered investment companies are permitted to invest in the Fund beyond the limits set forth in Section 12(d)(1) subject to certain terms and conditions set forth in an SEC exemptive order issued to the Trust, including that such investment companies enter into an agreement with the Fund.

An AP that is not a “qualified institutional buyer,” as such term is defined under Rule 144A of the Securities Act will not be able to receive, as part of a redemption, restricted securities eligible for resale under Rule 144A.

Dechert LLP serves as counsel to the Trust, including the Fund.

Sullivan & Worcester LLP serves as independent counsel to the independent trustees.

[ ] serves as the Trust’s independent registered public accounting firm and will audit the Fund’s financial statements annually.

OTHER INFORMATION

This prospectus does not contain all the information included in the registration statement filed with the SEC with respect to the Funds. The Funds’ registration statement, including this prospectus, the Funds’ SAI and the exhibits may be examined at the offices of the SEC (100 F Street, NE, Washington, DC 20549) or on the EDGAR database at the SEC’s website (http://www.sec.gov), and copies may be obtained, after paying a duplicating fee, by electronic request at the following email address: [email protected]. These documents and other information concerning the Trust also may be inspected at the offices of Foreside Fund Services, LLC at Three Canal Plaza, Suite 100, Portland, Maine 04101 or by calling 855-406-1506.

The SAI for the Funds, which has been filed with the SEC, provides more information about the Funds. The Funds’ SAI is incorporated herein by reference and is legally part of this prospectus. Additional information about the Funds’ investments will be available in the Funds’ annual and semi-annual reports to shareholders. In the Funds’ annual report, when available, you will find a discussion of the market conditions and investment strategies that significantly affected the Funds’ performance during its last fiscal year. The SAI and the Funds’ annual and semi-annual reports may be obtained without charge by visiting the Funds’ website at http://ark-funds.com/investor-resources, writing to the Funds at c/o ARK Investment Management LLC, 200 Central Avenue, Suite 220, St. Petersburg, Florida 33701 or by calling (727) 810-8160.

Investment Company Act File No. 811-22883