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PROSPECTUS May 5, 2021

QQQA	ProShares Nasdaq-100 Dorsey Wright Momentum ETF

As permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semi-annual shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (www.proshares.com), and you will be notified by mail each time a report is posted and provided with a website link to access the report.

If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically anytime by contacting your financial intermediary.

You may elect to receive all future reports in paper free of charge. Please contact your financial intermediary to request that you continue to receive paper copies of your shareholder reports. Your election to receive reports in paper will apply to all funds held in your account that you invest in through your financial intermediary.

ProShares Nasdaq-100 Dorsey Wright Momentum ETF is listed on the Nasdaq Stock Market (“Exchange”). Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy or adequacy of this Prospectus. Any representation to the contrary is a criminal offense.

PROSHARES TRUSTDistributor: SEI Investments Distribution Co.

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Investment Objective

ProShares Nasdaq-100 Dorsey Wright Momentum ETF (the “Fund”) seeks investment results, before fees and expenses, that track the performance of the Nasdaq-100 Dorsey Wright Momentum Index (the “Index”).

Fees and Expenses of the Fund

The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

Annual Fund Operating Expenses
(expenses that you pay each year as a percentage of the value of your investment)
Management Fees	0.58%
Other Expenses	0.00%
Total Annual Fund Operating Expenses	0.58%

Example: This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds.

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 each period. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your approximate costs would be:

1 Year	3 Years
$59	$186

The Fund pays transaction and financing costs associated with the purchase and sale of securities. These costs are not reflected in the table or the example above.

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the Fund’s shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the example above, affect the Fund’s performance. The Fund has not yet commenced operations as of the date of this Prospectus. Thus, no portfolio turnover information is provided for this Fund.

Principal Investment Strategies

The Fund invests in securities that ProShare Advisors believes, in combination, should track the performance of the Index. The Index, which is constructed and maintained by Dorsey, Wright & Associates, LLC (“Dorsey Wright”), consists

of 21 securities from the Nasdaq-100 Index with the highest price momentum as determined by Dorsey Wright. The Nasdaq-100 includes 100 of the largest domestic and international non-financial companies listed on The Nasdaq Stock Market based on market capitalization. Dorsey Wright ranks each stock in the Nasdaq-100 based on relative performance using its proprietary “Relative Strength” momentum measure. The 21 stocks ranked the highest at each reconstitution (January, April, July and October) are included in the Index and assigned equal weights. The weightings of each security in the Index may fluctuate between reconstitution dates. The Index is published under the Bloomberg ticker symbol “NDXDWA.”

The Fund will invest principally in the securities set forth below.

• Equity Securities — The Fund invests in common stock issued by public companies.

Depositary Receipts — The Fund may invest in depositary receipts, which principally include:

○ American Depositary Receipts (ADRs), which represent the right to receive securities of foreign issuers deposited in a bank or trust company and are an alternative to purchasing the underlying securities in their national markets and currencies

ProShare Advisors determines the type, quantity and mix of investment positions that it believes, in combination, the Fund should hold to produce returns consistent with the Fund’s investment objective. The Fund will generally use a “replication strategy” to achieve its investment objective, meaning that it will invest in all of the component securities of the Index in approximately the same proportion as the Index. However, the Fund may also use a “representative sampling” strategy to invest in or gain exposure to only a representative sample of the securities in the Index or to securities not contained in the Index or in financial instruments, with the intent of obtaining exposure with aggregate characteristics similar to those of the Index. In managing the assets of the Fund, ProShare Advisors does not invest the assets of the Fund in securities or financial instruments based on ProShare Advisors’ view of the investment merit of a particular security, instrument, or company, nor does it conduct conventional investment research or analysis or forecast market movement or trends. The Fund seeks to remain fully invested at all times in securities and/or financial instruments that, in combination, provide exposure to the returns of the Index without regard to market conditions, trends or direction.

The Fund will concentrate or focus its investments in a particular industry or group of industries, country or region to approximately the same extent the Index is so concentrated or focused. Concentration is defined as 25% or more of the value of an Index while focus is defined as a substantial portion of an Index but less than 25%. As of December 31, 2020, the

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Index was concentrated in the Semiconductor & Semiconductor Equipment and Software & Services industry groups and was not focused in any industry groups.

Please see “Investment Objectives, Principal Investment Strategies and Related Risks” in the Fund’s Prospectus for additional details.

Principal Risks

You could lose money by investing in the Fund.

The principal risks described below are intended to provide information about the factors likely to have a significant adverse impact on the Fund’s returns and consequently the value of an investment in the Fund. The risks are presented in an order intended to facilitate readability and their order does not imply that the realization of one risk is more likely to occur than another risk or likely to have a greater adverse impact than another risk.

• Correlation Risk — A number of factors may affect the Fund’s ability to achieve a high degree of correlation with the Index, and there is no guarantee that the Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective.

Factors that may adversely affect the Fund’s correlation with the Index include fees, expenses, transaction costs, income items, valuation methodology, accounting standards and disruptions or illiquidity in the markets for the financial instruments in which the Fund invests. The Fund may not have investment exposure to all of the securities in the Index, or its weighting of investment exposure to securities may be different from that of the Index. In addition, the Fund may invest in securities not included in the Index. The Fund may take or refrain from taking positions in order to improve tax efficiency, comply with regulatory restrictions, or for other reasons, each of which may negatively affect the Fund’s correlation with the Index. The Fund may also be subject to large movements of assets into and out of the Fund, potentially resulting in the Fund being over- or underexposed to the Index and may be impacted by Index reconstitutions and Index rebalancing events. Additionally, the Fund’s underlying investments may trade on markets that may not be open on the same day as the Fund, which may cause a difference between the performance of the Fund and the performance of the Index on such day. Any of these factors could decrease correlation between the performance of the Fund and the Index and may hinder the Fund’s ability to meet its investment objective.

• Momentum Investing Risk — Momentum investing emphasizes selecting stocks that have higher recent price performance compared to other stocks. Momentum can change quickly and changes may occur between Index reconstitutions. Companies that previously exhibited high momentum may underperform other companies that did not exhibit high momentum. Certain investment styles may fall in and out

of favor. If momentum investing is out of favor, the Fund’s performance may lag behind other funds using different investment styles.

• Equity and Market Risk — Equity markets are volatile, and the value of securities, swaps, futures and other instruments correlated with equity markets may fluctuate dramatically from day to day. Equity markets are subject to corporate, political, regulatory, market and economic developments, as well as developments that impact specific economic sectors, industries or segments of the market. Further, stocks in the Index may underperform other equity investments. Volatility in the markets and/or market developments may cause the value of an investment in the Fund to decrease over short or long periods of time.

• Concentration and Focused Investing — The Index may concentrate (i.e., composed of securities that represent 25 percent or more of the value of the Index) or focus (i.e., composed of securities that represent a substantial portion of its value, but less than 25 percent) in an industry or group of industries. The Fund will allocate its investments to approximately the same extent as the Index. As a result, the Fund may be subject to greater market fluctuations than a fund that is more broadly invested across industries. Financial, economic, business, regulatory conditions, and other developments affecting issuers in a particular industry or group of industries will have a greater effect on the Fund, and if securities of the particular industry or group of industries as a group fall out of favor, the Fund could underperform, or its net asset value may be more volatile than, funds that have greater industry diversification.

• Semiconductors and Semiconductor Equipment Industry Risk — The risks of investments in the industry include: intense competition, both domestically and internationally, including competition from subsidized foreign competitors with lower production costs; wide fluctuations in securities prices due to risks of rapid obsolescence of products; economic performance of the customers of semiconductor companies; their research costs and the risks that their products may not prove commercially successful; capital equipment expenditures that could be substantial and suffer from rapid obsolescence; and thin capitalization and limited product lines, markets, financial resources or personnel. The semiconductors sector may also be affected by risks that affect the broader technology sector, including: government regulation; dramatic and often unpredictable changes in growth rates and competition for qualified personnel; heavy dependence on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability; and a small number of companies representing a large portion of the technology sector as a whole.

• Software and Services Industry Risk — The risks of investments in the industry include: competitive pressures, such as

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aggressive pricing (including fixed-rate pricing), technological developments (including product-specific technological change), changing domestic demand, and the ability to attract and retain skilled employees; availability and price of components; dependence on intellectual property rights, and potential loss or impairment of those rights; research and development costs; rapid product obsolescence; cyclical market patterns; evolving industry standards; and frequent new product introductions requiring timely and successful introduction of new products and the ability to service such products. The software and services industry may also be affected by risks that affect the broader information technology industry.

• Large-Cap Company Investment Risk — Although returns on investments in large-cap companies are often perceived as being less volatile than the returns of companies with smaller market capitalizations, the return on large-cap securities could trail the returns on investments in smaller and mid-sized companies for a number of reasons. For example, large-cap companies may be unable to respond quickly to new competitive challenges, such as changes in technology, and also may not be able to attain the high growth rate of successful smaller companies.

• Foreign Investments Risk/Emerging Market Risk — Exposure to securities of foreign issuers may provide the Fund with increased risk. Various factors related to foreign investments may negatively impact the Fund’s and the Index’s performance, such as: i) fluctuations in the value of the applicable foreign currency; ii) differences in securities settlement practices; iii) uncertainty associated with evidence of ownership of investments in countries that lack centralized custodial services; iv) possible regulation of, or other limitations on, investments by U.S. investors in foreign investments; v) potentially higher brokerage commissions; vi) the possibility that a foreign government may withhold portions of interest and dividends at the source; vii) taxation of income earned in foreign countries or other foreign taxes imposed; viii) foreign exchange controls, which may include suspension of the ability to transfer currency from a foreign country; ix) less publicly available information about foreign issuers; x) changes in the denomination currency of a foreign investment; and xi) less certain legal systems in which the Fund may encounter difficulties or be unable to pursue legal remedies. Foreign investments also may be more susceptible to political, social, economic and regional factors than may be the case with U.S. securities. In addition, markets for foreign investments are usually less liquid, more volatile and significantly smaller than markets for U.S. securities, which may affect, among other things, the Fund’s ability to purchase or sell foreign investments at appropriate times and prices. Because of differences in settlement times and/or foreign market holidays, transactions in a foreign market may take place one or more days after the necessary exposure to these investments is determined. Until the transactions are

effected, the Fund is exposed to increased foreign currency risk and market risk and, ultimately, increased correlation risk.

Because the Fund’s foreign investment exposure may include issuers domiciled in developing or “emerging market” countries, all the aforementioned factors are heightened and foreign investments risk is higher. Economic, business, political, or social instability may adversely affect the value of emerging market investments more acutely than investments tied to developed foreign countries. Furthermore any of these developments may result in a decline in the value of a country’s currency. Emerging markets are riskier than more developed markets because they may develop unevenly or may never fully develop. Investments in emerging markets are considered speculative.

• Natural Disaster/Epidemic Risk — Natural or environmental disasters, such as earthquakes, fires, floods, hurricanes, tsunamis and other severe weather-related phenomena generally, and widespread disease, including pandemics and epidemics (for example, the novel coronavirus COVID-19), have been and can be highly disruptive to economies and markets and have recently led, and may continue to lead, to increased market volatility and significant market losses. Such natural disaster and health crises could exacerbate political, social, and economic risks, and result in significant breakdowns, delays, shutdowns, social isolation, and other disruptions to important global, local and regional supply chains affected, with potential corresponding results on the operating performance of the Fund and its investments. A climate of uncertainty and panic, including the contagion of infectious viruses or diseases, may adversely affect global, regional, and local economies and reduce the availability of potential investment opportunities, and increases the difficulty of performing due diligence and modeling market conditions, potentially reducing the accuracy of financial projections. Under these circumstances, the Fund may have difficulty achieving its investment objectives which may adversely impact Fund performance. Further, such events can be highly disruptive to economies and markets, significantly disrupt the operations of individual companies (including, but not limited to, the Fund’s investment advisor, third party service providers, and counterparties), sectors, industries, markets, securities and commodity exchanges, currencies, interest and inflation rates, credit ratings, investor sentiment, and other factors affecting the value of the Fund’s investments. These factors can cause substantial market volatility, exchange trading suspensions and closures, changes in the availability of and the margin requirements for certain instruments, and can impact the ability of the Fund to complete redemptions and otherwise affect Fund performance and Fund trading in the secondary market. A widespread crisis would also affect the global economy in ways that

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cannot necessarily be foreseen. How long such events will last and whether they will continue or recur cannot be predicted. Impacts from these could have a significant impact on the Fund’s performance, resulting in losses to your investment.

• Risk that Current Assumptions and Expectations Could Become Outdated As a Result of Global Economic Shock — The onset of the novel coronavirus (COVID-19) has caused significant shocks to global financial markets and economies, with many governments taking extreme actions to slow and contain the spread of COVID-19. These actions have had, and likely will continue to have, a severe economic impact on global economies as economic activity in some instances has essentially ceased. Financial markets across the globe are experiencing severe distress at least equal to what was experienced during the global financial crisis in 2008. In March 2020, U.S. equity markets entered a bear market in the fastest such move in the history of U.S. financial markets. During much of 2020, the unemployment rate in the U.S. was extremely high by historical standards. It is not possible to predict when unemployment and market conditions will return to more normal levels. The global economic shocks being experienced as of the date hereof may cause the underlying assumptions and expectations of the Fund to become outdated quickly or inaccurate, resulting in significant losses.

• Non-Diversification Risk — The Fund is classified as “non-diversified” under the Investment Company Act of 1940, as amended (“1940 Act”). This means it has the ability to invest a relatively high percentage of its assets in the securities of a small number of issuers. This may increase the Fund’s volatility and increase the risk that the Fund’s performance will decline based on the performance of a single issuer.

• Index Performance Risk — The Index is maintained by a third party provider unaffiliated with the Fund or ProShare Advisors. There can be no guarantee or assurance that the methodology used by the third party provider to create the Index will result in the Fund achieving positive returns. Further, there can be no guarantee that the methodology underlying the Index or the daily calculation of the Index will be free from error. For an Index with exposure to foreign, and especially emerging markets, there may be heightened risks associated with the adequacy and reliability of the information used to calculate the Index, as some foreign markets may have less information available. ProShare Advisors has no ability to assess a third party provider’s due diligence process over index data prior to its use in index computation, construction and/or rebalancing. It is also possible that the value of the Index may be subject to intentional manipulation by third-party market participants. The Index used by the Fund may underperform other asset classes and may underperform other similar indices. Each of these factors could have a negative impact on the performance of the Fund.

• Market Price Variance Risk — Investors buy and sell Fund shares in the secondary market at market prices, which may be different from the NAV per share of the Fund (i.e., the secondary market price may trade at a price greater than NAV (a premium) or less than NAV (a discount)). The market price of the Fund’s shares will fluctuate in response to changes in the value of the Fund’s holdings, supply and demand for shares and other market factors. In addition, the instruments held by the Fund may be traded in markets on days and at times when the Fund’s listing exchange is closed for trading. As a result, the value of the Fund’s holdings may vary, perhaps significantly, on days and at times when investors are unable to purchase or sell Fund shares. ProShare Advisors cannot predict whether shares will trade above, below or at a price equal to the value of the Fund’s holdings.

• Early Close/Late Close/Trading Halt Risk — An exchange or market may close early, close late or issue trading halts on specific securities or financial instruments. As a result, the ability to trade certain securities or financial instruments may be restricted, which may disrupt the Fund’s creation and redemption process, potentially affect the price at which the Fund’s shares trade in the secondary market, and/or result in the Fund being unable to trade certain securities or financial instruments at all. In these circumstances, the Fund may be unable to rebalance its portfolio, may be unable to accurately price its investments and/or may incur substantial trading losses. If trading in the Fund’s shares are halted, investors may be temporarily unable to trade shares of the Fund.

• Liquidity Risk — In certain circumstances, such as the disruption of the orderly markets for the financial instruments in which the Fund invests, the Fund might not be able to acquire or dispose of certain holdings quickly or at prices that represent true market value in the judgment of ProShare Advisors. Markets for the financial instruments in which the Fund invests may be disrupted by a number of events, including but not limited to economic crises, political crises, health crises, natural disasters, excessive volatility, new legislation, or regulatory changes inside or outside of the U.S. For example, regulation limiting the ability of certain financial institutions to invest in certain financial instruments would likely reduce the liquidity of those instruments. These situations may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Index.

• New Fund Risk — The Fund recently commenced operations, has a limited operating history, and started operations with a small asset base. There can be no assurance that the Fund will be successful or grow to or maintain a viable size, that an active trading market for the Fund’s share will develop or be maintained, or that the Fund’s shares’ listing will continue unchanged.

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• Portfolio Turnover Risk — The Fund may incur high portfolio turnover to manage the Fund’s investment exposure. Additionally, active market trading of the Fund’s shares may cause more frequent creation or redemption activities that could, in certain circumstances, increase the number of portfolio transactions. High levels of portfolio transactions increase brokerage and other transaction costs and may result in increased taxable capital gains. Each of these factors could have a negative impact on the performance of the Fund.

• Tax Risk — In order to qualify for the special tax treatment accorded a regulated investment company (“RIC”) and its shareholders, the Fund must derive at least 90% of its gross income for each taxable year from “qualifying income,” meet certain asset diversification tests at the end of each taxable quarter, and meet annual distribution requirements. The Fund’s pursuit of its investment strategies will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund can make certain investments, the treatment of which for these purposes is unclear. If, in any year, the Fund were to fail to qualify for the special tax treatment accorded a RIC and its shareholders, and were ineligible to or were not to cure such failure, the Fund would be taxed in the same manner as an ordinary corporation subject to U.S. federal income tax on all its income at the fund level. The resulting taxes could substantially reduce the Fund’s net assets and the amount of income available for distribution. In addition, in order to requalify for taxation as a RIC, the Fund could be required to recognize unrealized gains, pay substantial taxes and interest, and make certain distributions. Please see the Statement of Additional Information for more information.

• Valuation Risk — In certain circumstances (e.g., if ProShare Advisors believes market quotations do not accurately reflect the fair value of an investment, or a trading halt closes an exchange or market early), ProShare Advisors may, in its sole discretion, choose to determine a fair value price as the basis for determining the market value of such investment for such day. The fair value of an investment determined by ProShare Advisors may be different from other value determinations of the same investment. Portfolio investments that are valued using techniques other than market quotations, including “fair valued” investments, may be subject to greater fluctuation in their value from one day to the next than would be the case if market quotations were used. In addition, there is no assurance that the Fund could sell a portfolio investment for the value

established for it at any time, and it is possible that the Fund would incur a loss because a portfolio investment is sold at a discount to its established value.

Please see “Investment Objectives, Principal Investment Strategies and Related Risks” in the Fund’s Prospectus for additional details.

Investment Results

Performance history will be available for the Fund after it has been in operation for a full calendar year. After the Fund has a full calendar year of performance information, performance information will be shown on an annual basis.

Management

The Fund is advised by ProShare Advisors. Michael Neches, Senior Portfolio Manager, and Devin Sullivan, Portfolio Manager, have jointly and primarily managed the Fund since inception.

Purchase and Sale of Fund Shares

The Fund will issue and redeem shares only to Authorized Participants (typically broker-dealers) in exchange for the deposit or delivery of a basket of assets (securities and/or cash) in large blocks, known as Creation Units. Shares of the Fund may only be purchased and sold by retail investors in secondary market transactions through broker-dealers or other financial intermediaries. Shares of the Fund are listed for trading on a national securities exchange and because shares trade at market prices rather than NAV, shares of the Fund may trade at a price greater than NAV (premium) or less than NAV (discount). In addition to brokerage commissions, investors incur the costs of the difference between the highest price a buyer is willing to pay to purchase shares of the Funds (bid) and the lowest price a seller is willing to accept for shares of the Fund (ask) when buying or selling shares in the secondary market (the “bid-ask spread”). The bid-ask spread varies over time for Fund shares based on trading volume and market liquidity. Recent information, including information about a Fund’s NAV, market price, premiums and discounts, and bid-ask spreads, is included on the Fund’s website (www.proshares.com).

Tax Information

Income and capital gains distributions you receive from the Fund generally are subject to federal income taxes and may also be subject to state and local taxes. The Fund intends to distribute income, if any, quarterly, and capital gains, if any, at least annually.

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This section contains additional details about the Fund’s investment objectives, principal investment strategies and related risks.

Investment Objectives

The Fund seeks investment results, before fees and expenses, that track the performance of the Index. The Fund’s investment objective is non-fundamental, meaning that it may be changed by the Board of Trustees (the “Board”) of ProShares Trust (the “Trust”), without the approval of Fund shareholders. The Fund reserves the right to substitute a different index for the Index without shareholder approval.

Principal Investment Strategies

In seeking to achieve the Fund’s investment objective, ProShare Advisors follows a passive approach to investing that is designed to track the performance of the Index. The Fund attempts to achieve its investment objective by investing all, or substantially all, of its assets in the component securities of the Index. The Fund employs various investment techniques that ProShare Advisors believes should, in the aggregate, simulate the movement of the Index.

ProShare Advisors does not invest the assets of the Fund in securities or financial instruments based on ProShare Advisors’ view of the investment merit of a particular security, or company, other than for cash management purposes, nor does it conduct conventional investment research or analysis (other than in determining counterparty creditworthiness), or forecast market movement or trends, in managing the assets of the Fund. The Fund generally seeks to remain fully invested at all times in securities that, in combination, provide exposure to the Index without regard to market conditions, trends, direction, or the financial condition of a particular issuer.

Please see “Principal Investment Strategies” in the Fund’s Summary Prospectus for more detail about the financial instruments in which the Fund invests.

Additional Information Regarding Principal Risks

Like all investments, investing in the Fund entails risks. The factors most likely to have a significant impact on the Fund’s portfolio are called “principal risks.” The principal risks for the Fund are described in the Fund’s Summary Prospectus and additional information regarding certain of these risks, as well as information related to other potential risks to which the Fund may be subjected, is provided below. The principal risks are intended to provide information about the factors likely to have a significant adverse impact on the Fund’s returns and consequently the value of an investment in the Fund. The risks are presented in an order intended to facilitate readability and their order does not imply that the realization of one risk is more likely to occur than another risk or likely to have a greater adverse impact than another risk. The Statement of Additional Information (“SAI”) contains additional information about the Fund, investment strategies and related risks. The Fund may be subject to other risks in addition to those identified as principal risks.

Correlation Risk — There is no guarantee that the Fund will achieve a high degree of correlation with its benchmark. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective, and the percentage change of the Fund’s net asset value (“NAV”) each day may differ, perhaps significantly, from the percentage change of the Fund’s benchmark on such day. This may be due, among other reasons, to the impact of a limited trading market in the underlying component securities on the calculation of the benchmark. A number of other factors may adversely affect the Fund’s correlation with its benchmark, including material over- or underexposure, fees, expenses, transaction costs, financing costs associated with the use of derivatives, income items, valuation methodology, infrequent trading in the securities underlying its benchmark, accounting standards and disruptions or illiquidity in the markets for the financial instruments in which the Fund invests. The Fund may not have investment exposure to all financial instruments in the Index, or its weighting of investment exposure to financial instruments may be different from that of the Index. In addition, the Fund may invest in financial instruments not included in the Index. The Fund may take or refrain from taking positions in order to improve tax efficiency or comply with regulatory restrictions, either of which may negatively affect the Fund’s correlation with its benchmark. The Fund may be subject to large movements of assets into and out of the Fund, potentially resulting in the Fund being over- or underexposed to its benchmark and may be impacted by index reconstitutions and index rebalancing events. Additionally, the Fund’s underlying holdings or reference assets may trade on markets that may not be open on the same day as the Fund, which may cause a difference between the changes in the daily performance of the Fund and changes in the level of the Index.

• Concentration and Focused Investing — An index may concentrate (i.e., may be composed of securities that represent 25 percent or more of the value of the index) or focus (i.e., may be composed of securities that represent a substantial portion of its value, but less than 25 percent) in an industry or group of industries. The Fund will allocate its investments to approximately the same extent as its index. As a result, the the Fund may be subject to greater market fluctuations than a fund that is more broadly invested across industries. Financial, economic, business, regulatory conditions, and other developments affecting issuers in a particular industry or group of industries will have a greater effect on the Fund, and if securities of the particular industry or group of industries as a group fall out of favor, the Fund could underperform, or its net asset value may be more volatile than, funds that have greater industry diversification.

• Foreign Investments Risk — Certain factors related to investment in securities of foreign issuers or other investments that provide the Fund with exposure to foreign issuers (collectively, “foreign investments”) may prevent the Fund from achieving its goals. These factors may include the effects of: (i) fluctuations in the value of the local currency versus

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the U.S. dollar and the uncertainty associated with the cost of converting between various currencies, even if the Fund attempts to hedge against its currency exposure; (ii) differences in settlement practices, as compared to U.S. investments, or delayed settlements in some foreign markets; (iii) the uncertainty associated with evidence of ownership of investments in many foreign countries, which may lack the centralized custodial services and rigorous proofs of ownership required by many U.S. investments; (iv) possible regulation of, or other limitations on, investments by U.S. investors in foreign investments; (v) brokerage commissions and fees and other investment related costs that may be higher than those applicable to U.S. investments; (vi) the possibility that a foreign government may withhold portions of interest and dividends at the source; (vii) taxation of income earned in foreign nations or other taxes imposed with respect to investments in foreign nations; (viii) changes in the denomination currency of a foreign investment, (ix) foreign exchange controls, which may include suspension of the ability to transfer currency from a given country; (x) less publicly available information about foreign issuers; and (xi) less certain legal systems in which the Fund may encounter difficulties or be unable to pursue legal remedies.

In addition, markets for foreign investments are usually less liquid, more volatile and significantly smaller than markets for U.S. securities, which may affect, among other things, the Fund’s ability to obtain exposure to those foreign investments at appropriate times and prices. Because of differences in settlement times and/or foreign market holidays, transactions in a foreign market may take place one or more days after the necessary exposure to these investments is determined. Until the transactions are effected, the Fund is exposed to increased foreign currency risk and market risk and, ultimately, increased correlation risk.

The Fund’s performance also may be affected by factors related to its ability to obtain information about foreign investments. In many foreign countries, there is less publicly available information about issuers than is available in reports about U.S. issuers. Markets for foreign investments are usually not subject to the degree of government supervision and regulation that exists for U.S. investments. Foreign issuers are not generally subject to uniform accounting, auditing and financial reporting standards, and auditing practices and requirements may not be comparable to those applicable to U.S. issuers. The Public Company Accounting Oversight Board, which regulates auditors of U.S. public companies, is unable to inspect audit work papers in certain foreign countries. Furthermore, the issuers of foreign investments may be closely controlled by a small number of families, institutional investors or foreign governments whose investment decisions might be difficult to predict. To the extent the Fund’s assets are exposed to contractual and other legal obligations in a for

eign country, (e.g., swap agreements with foreign counterparties), these factors may affect the Fund’s ability to achieve its investment objective. The Fund may encounter difficulties or be unable to pursue legal remedies and obtain judgments in foreign courts. In some countries, information about decisions of the judiciary, other government branches, regulatory agencies and tax authorities may be less transparent than decisions by comparable institutions in the U.S., particularly in countries that are politically dominated by a single party or individual. Moreover, enforcement of such decisions may be inconsistent or uncertain. Investors in foreign countries often have limited rights and few practical remedies to pursue shareholder claims, including class actions or fraud claims and the ability of the U.S. Securities and Exchange Commission, the U.S. Department of Justice and other authorities to bring and enforce actions against foreign issuers or foreign persons is limited.

Foreign investments also may be more susceptible to political, social, economic and regional factors than may be the case for U.S. securities. These factors include the effect of: (i) expropriation, nationalization or confiscatory taxation of foreign investments; (ii) changes in credit conditions related to foreign counterparties, including foreign governments and foreign financial institutions; (iii) trade barriers, exchange controls, managed adjustments in relative currency values and other protectionist measures; and (iv) issues related to multi-national currency arrangements; and (v) increased correlation between the value of foreign investments and changes in the commodities markets.

• Special Considerations About Emerging Market Countries — Because foreign investments of the Fund may include issuers domiciled in developing or “emerging market” countries, the aforementioned factors are heightened and foreign investments risk is higher. Economic, business, political or social instability may adversely affect the value of emerging market securities more acutely than securities tied to developed foreign market countries. Emerging markets are riskier than more developed markets because they may develop unevenly or may never fully develop. Investments in emerging market countries are considered speculative.

○ Political and Social Risk — Some governments in emerging markets countries are authoritarian in nature or have been installed or removed as a result of military coups, and some governments have periodically used force to suppress civil dissent. Disparities of wealth, the pace and success of democratization, and ethnic, religious and racial disaffection, have also led to social unrest, violence and/or labor unrest in some emerging market countries. Unanticipated political or social developments may result in sudden and significant investment losses. Also, investing in emerging market countries involves a great risk of loss due to expropriation, nationalization, confiscation of assets and property or the imposition of

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restrictions on foreign investments and repatriation of capital invested by certain emerging market countries.

○ Economic Risk — Some emerging market countries have experienced currency devaluations and substantial (and, in some cases, extremely high) rates of inflation, while others have experienced economic recessions causing a negative effect on the economies and securities markets of such emerging countries. Further, economies in emerging market countries generally are dependent heavily upon commodity prices and international trade and, accordingly, may be affected adversely by the economies of their trading partners, trade barriers, exchange controls, managed adjustments in relative currency values, and may suffer from extreme and volatile debt burdens or inflation rates.

○ Market Risk – Some emerging market countries may have inefficient and underdeveloped financial markets and therefore may lack the infrastructure necessary to attract large amounts of foreign trade and investment. As a result, emerging market issuers may have limited access to reliable sources of capital. Inefficient markets combined with less sophisticated regulatory oversight may also mean that securities traded in emerging markets are more susceptible to market manipulation by other market participants. Furthermore, legal principles relating to standards of corporate governance and directors’ fiduciary duties may differ from and/or not be as extensive or protective as those that apply in the U.S.

• Geographic Concentration Risk — Funds that focus their investments in companies economically tied to particular foreign countries or geographic regions may be particularly susceptible to economic, political or regulatory events affecting those countries or regions. In addition, currency devaluations or other declines in the value of their currency could occur in foreign countries that have not yet experienced currency devaluation or declines to date, or could continue to occur in foreign countries that have already experienced such devaluations or declines. As a result, funds that focus their investments in companies economically tied to a particular foreign geographic region or country may be more volatile than a more geographically diversified fund.

• Market Price Variance Risk — Individual shares of the Fund can be bought and sold in the secondary market at market prices rather than at NAV. There is no guarantee that an active secondary market will develop for shares of the Fund, which may also cause NAV and market value to vary significantly. The market price of the Fund’s shares will fluctuate in response to changes in the value of the Fund’s holdings, supply and demand for shares and other market factors. ProShare Advisors cannot predict whether shares will trade above, below or at a price equal to the value of the Fund’s holdings. Differences between secondary market prices and the value of the Fund’s holdings may be due

largely to supply and demand forces in the secondary market, which may not be the same forces as those influencing prices for securities or financial instruments held by the Fund at a particular time. In addition, there may be times when the market price and the NAV of the Fund’s shares vary significantly, such as during periods of market volatility, and a shareholder may trade shares at a premium or a discount to the Fund’s NAV and may receive less than the value of the Fund’s holdings when you sell those shares.

The Fund may have a limited number of financial institutions that may act as Authorized Participants or market markers. Only Authorized Participants who have entered into agreements with the Fund’s distributor may engage in creation or redemption transactions directly with the Fund. If some or all of these Authorized Participants exit the business or are unable to process creation and/or redemption orders, and no other Authorized Participant is willing or able to create and redeem Fund shares, shares may trade at a discount to NAV (and may even face trading halts or delisting). Similar effects may result if market makers exit the business or are unable to continue making markets in the shares. Further, while the creation/redemption feature is designed to make it likely that shares normally will trade at prices correlated to the price of the Fund’s portfolio holdings, disruptions to creations and redemptions, including disruptions at market makers, Authorized Participants or market participants, or during periods of significant market volatility, among other factors, may result in market prices that differ significantly from NAV. Investors purchasing and selling shares in the secondary market may not experience investment results based on the price of their shares in the secondary market. The market price of shares, like the price of any exchange-traded security, includes a “bid-ask spread” charged by the exchange specialist, market makers or other participants that trade the particular security. In times of severe market disruption or during after-hours trading, the bid-ask spread often increases significantly. This means that shares may trade at a discount to the value of the Fund’s holdings, and the discount is likely to be greatest when the price of shares is falling fastest, which may be the time that you most want to sell your shares. The Fund’s investment results are measured based upon the daily NAV of the Fund.

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unclear. If, in any year, the Fund were to fail to qualify for the special tax treatment accorded a RIC and its shareholders, and were ineligible to or were not to cure such failure, the Fund would be taxed in the same manner as an ordinary corporation subject to U.S. federal income tax on all its income at the fund level. The resulting taxes could substantially reduce the Fund’s net assets and the amount of income available for distribution. In addition, in order to requalify for taxation as a RIC, the Fund could be required to recognize unrealized gains, pay substantial taxes and interest, and make certain distributions. Please see the Statement of Additional Information for more information.

Other Risks

In addition to the risks noted above, many other factors may also affect the value of an investment in the Fund, such as market conditions, interest rates and other economic, political or financial developments. The impact of these developments on the Fund will depend upon the types of investments in which the Fund invests, the Fund’s level of investment in particular issuers and other factors, including the financial condition, industry, economic sector and location of such issuers. The SAI contains additional information about the Fund, its investment strategies and related risks. The Fund may be subject to other risks in addition to those identified as principal risks.

• Cash and Cash Equivalents Risk — Cash and cash equivalents, including money market instruments, may be adversely affected by market and economic events or a negative return on cash holdings. Adverse economic, political or other developments affecting issuers of money market instrument; or defaults by transaction counterparties may also have a negative impact on the performance of such instruments. Each of these could have a negative impact on the performance of the Fund.

• Cybersecurity Risk — With the increased use of technologies such as the Internet and the dependence on computer systems to perform necessary business functions, the Fund, Authorized Participants, service providers and the relevant listing exchange are susceptible to operational, information security and related “cyber” risks. In general, cyber incidents can result from deliberate attacks or unintentional events. Cyber attacks include, but are not limited to gaining unauthorized access to digital systems for purposes of misappropriating assets or sensitive information, corrupting data, or causing operational disruption. Cyber attacks may also be carried out in a manner that does not require gaining unauthorized access, such as causing among other behaviors, stealing or corrupting data maintained online or digitally, and denial of service attacks on websites. Cybersecurity failures or breaches of the Fund’s third party service provider (including, but not limited to, index providers, the administrator and transfer agent) or the issuers of securities and/or financial instruments in which the Fund invests, have the ability to cause disrup

tions and impact business operations, potentially resulting in financial losses, the inability of Fund shareholders to transact business, violations of applicable privacy and other laws. For instance, cyber attacks may interfere with the processing of shareholder transactions, impact the Fund’s ability to calculate its NAV, cause the release of private shareholder information or confidential Fund information, impede trading, cause reputational damage, and subject the Fund to regulatory fines, penalties or financial losses, reimbursement or other compensation costs, and/or additional compliance costs. In addition, substantial costs may be incurred in order to prevent any cyber incidents in the future. The Fund and its shareholders could be negatively impacted as a result. While the Fund or its service providers may have established business continuity plans and systems designed to guard against such cyber attacks or adverse effects of such attacks, there are inherent limitations in such plans and systems including the possibility that certain risks have not been identified, in large part because different unknown threats may emerge in the future. Similar types of cybersecurity risks also are present for issuers of securities in which the Fund invests, which could result in material adverse consequences for such issuers, and may cause the Fund’s investments in such securities to lose value. In addition, cyber attacks involving a counterparty to the Fund could affect such a counterparty’s ability to meets it obligations to the Fund, which may result in losses to the Fund and its shareholders. ProShare Advisors and the Trust do not control the cybersecurity plans and systems put in place by third party service providers, and such third party service providers may have no or limited indemnification obligations to ProShare Advisors or the Fund.

• LIBOR Risk — The terms of many investments, financings or other transactions to which the Fund may be a party have been historically tied to the London Interbank Offered Rate, or “LIBOR.” LIBOR is the offered rate at which major international banks can obtain wholesale, unsecured funding, and LIBOR may be available for different durations (e.g., 1 month or 3 months) and for different currencies. LIBOR may be a significant factor in determining the Fund’s payment obligations under a derivative investment, the cost of financing to the Fund or an investment’s value or return to the Fund, and may be used in other ways that affect the Fund’s investment performance. In July 2017, the Financial Conduct Authority (the “FCA”), the United Kingdom’s financial regulatory body, announced that after 2021 it will cease its active encouragement of banks to provide the quotations needed to sustain LIBOR. On March 5, 2021, the FCA and LIBOR’s administrator, ICE Benchmark Administration (“IBA”), announced that most LIBOR settings will no longer be published after the end of 2021 and a majority of U.S. dollar LIBOR settings will no longer be published after June 30, 2023. It is possible that the FCA may compel the IBA to publish a subset of LIBOR settings

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after these dates on a “synthetic” basis, but any such publications would be considered non-representative of the underlying market. Actions by regulators have resulted in the establishment of alternative reference rates to LIBOR in most major currencies (e.g., the Secured Overnight Financing Rate, which is intended to replace the U.S. dollar LIBOR). Alternative reference rates can differ significantly from LIBOR – both in the actual rate and how it is calculated – and it is unclear whether and when markets will adopt these rates as a widely accepted replacement for LIBOR. Various financial industry groups have begun planning for transition away from LIBOR, but there are also obstacles to converting certain securities and transactions to new reference rates. Markets are developing slowly and questions around liquidity in these rates and how to appropriately adjust these rates to mitigate any economic value transfer at the time of transition remain a significant concern. Neither the effect of the transition process nor its ultimate success can yet be known. The transition process might lead to increased volatility and illiquidity in markets for instruments whose terms currently include LIBOR. It could also lead to a reduction in the value of some LIBOR-based investments and reduce the effectiveness of new hedges placed against existing LIBOR-based investments. While some LIBOR-based instruments may contemplate a scenario where LIBOR is no longer available by providing for an alternative rate-setting methodology and/or increased costs for certain LIBOR-related instruments or financing transactions, not all may have such provisions and there may be significant uncertainty regarding the effectiveness of any such alternative methodologies, resulting in prolonged adverse market conditions for the Fund. Since the usefulness of LIBOR as a benchmark could deteriorate during the transition period, these effects could occur prior to the end of 2021. There also remains uncertainty and risk regarding the willingness and ability of issuers to include enhanced provisions in new and existing contracts or instruments. All of the aforementioned may adversely affect the Fund’s performance or NAV.

• Operational Risk — The Fund, its service providers, Authorized Participants, and the relevant listing exchange are subject to operational risks arising from, among other things, human error, systems and technology errors and disruptions, failed or inadequate controls, and fraud. These errors may adversely affect the Fund’s operations, including its ability to execute its investment process, calculate or disseminate its NAV or intraday indicative value in a timely manner, and process creations or redemptions. While the Fund seeks to minimize such events through controls and oversight, there may still be failures and the Fund may be unable to recover any damages associated with such failures. These failures may have a material adverse effect on the Fund’s returns.

• Securities Lending Risk — The Fund may engage in securities lending. Securities lending involves the risk, as with other

extensions of credit, that the Fund may lose money because (a) the borrower of the loaned securities fails to return the securities in a timely manner or at all or (b) it loses its rights in the collateral should the borrower fail financially. The Fund could also lose money in the event of a decline in the value of collateral provided for loaned securities or a decline in the value of any investments made with cash collateral. These events could also trigger adverse tax consequences for the Fund. In determining whether to lend securities, ProShare Advisors or the Fund’s securities lending agent will consider relevant facts and circumstances, including the creditworthiness of the borrower.

• Trading Risks — The shares of the Fund are listed for trading on the listing exchange identified on the cover of this Prospectus, may be listed or traded on U.S. and non-U.S. stock exchanges other than such exchange, and may trade on an electronic communications network. Nevertheless, there can be no assurance that an active trading market for such shares will develop or be maintained. Trading in shares of the Fund on an exchange may be halted due to market conditions or for reasons that, in the view of an exchange, make trading in shares inadvisable. In addition, trading in shares of the Fund on an exchange is subject to trading halts caused by extraordinary market volatility pursuant to exchange “circuit breaker” rules. There can be no assurance that the requirements of the exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged or that the shares of the Fund will trade with any volume, or at all, on any stock exchange or other venue.

Additional Securities, Instruments and Strategies

This section describes additional securities, instruments and strategies that may be utilized by the Fund that are not principal investment strategies of the Fund unless otherwise noted in the Fund’s description of principal strategies in the Fund’s Summary Prospectus. Additional Information about of the types of investments that the Fund may make is set forth in the SAI.

In certain circumstances, the Fund may gain exposure to only a representative sample of the securities in the index, which exposure is intended to have aggregate characteristics similar to the index. In addition, the Fund may overweight or underweight certain components contained in its underlying index, or invest in investments not contained in the index but that are designed to provide the requisite exposure to the index.

• Securities Lending — The Fund may lend securities to brokers, dealers and financial organizations under guidelines adopted by the Board. The Fund may loan up to one-third of the value of the Fund’s total assets (including the value of any collateral received). Each loan may be secured by collateral in the form of cash, Money Market Instruments or U.S. Government securities.

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Precautionary Notes

A Precautionary Note to Retail Investors — The Depository Trust Company (“DTC”), a limited trust company and securities depositary that serves as a national clearinghouse for the settlement of trades for its participating banks and broker-dealers, or its nominee will be the registered owner of all outstanding shares of the Fund. Your ownership of shares will be shown on the records of DTC and the DTC Participant broker through whom you hold the shares. PROSHARES TRUST WILL NOT HAVE ANY RECORD OF YOUR OWNERSHIP. Your account information will be maintained by your broker, who will provide you with account statements, confirmations of your purchases and sales of shares, and tax information. Your broker also will be responsible for furnishing certain cost basis information and ensuring that you receive shareholder reports and other communications from the Fund whose shares you own. Typically, you will receive other services (e.g., average cost information) only if your broker offers these services.

A Precautionary Note to Purchasers of Creation Units — You should be aware of certain legal risks unique to investors purchasing Creation Units directly from the issuing Fund. Because new shares from the Fund may be issued on an ongoing basis, a “distribution” of that Fund’s shares could be occurring at any time. As a dealer, certain activities on your part could, depending on the circumstances, result in your being deemed a participant in the distribution, in a manner that could render you a statutory underwriter and subject you to the prospectus delivery and liability provisions of the Securities Act of 1933. For example, you could be deemed a statutory underwriter if you purchase Creation Units from an issuing Fund, break them down into the constituent shares, and sell those shares directly to customers, or if you choose to couple the creation of a supply of new shares with an active selling effort involving solicitation of secondary market demand for shares. Whether a person is an underwriter depends upon all of the facts and circumstances pertaining to that person’s activities, and the examples mentioned here should not be considered a complete description of all the activities that could cause you to be deemed an underwriter. Dealers who are not “underwriters,” but are participating in a distribution (as opposed to engaging in ordinary secondary market transactions), and thus dealing with shares as part of an “unsold allotment” within the meaning of Section 4(3)(C) of the Securities Act, will be unable to take advantage of the prospectus delivery exemption provided by Section 4(3) of the Securities Act.

A Precautionary Note to Investment Companies — For purposes of the Investment Company Act of 1940, the Fund is a registered investment company, and the acquisition of the Fund’s shares by other investment companies is subject to the restrictions of Section 12(d)(1) thereof. The Trust and the Fund have obtained an exemptive order from the SEC allowing a registered investment company to invest in Fund shares beyond the limits of Section 12(d)(1) subject to certain conditions, including that a registered investment company enters into a

Participation Agreement with the Trust regarding the terms of the investment. Any investment company considering purchasing shares of the Fund in amounts that would cause it to exceed the restrictions of Section 12(d)(1) should contact the Trust.

A Precautionary Note Regarding Unusual Circumstances — ProShares Trust can, in its discretion, postpone payment of redemption proceeds for any period during which: (1) the Exchange is closed other than customary weekend and holiday closings; (2) trading on Exchange is restricted; (3) any emergency circumstances exist, as determined by the SEC; (4) the SEC by order permits for the protection of shareholders of the Fund; and (5) for up to 14 calendar days for any Fund holding non-U.S. investments during a period of an international local holiday, as further described in the SAI.

A Precautionary Note Regarding Regulatory Initiatives — There is a possibility of future regulatory changes altering, perhaps to a material extent, the nature of an investment in the Fund or the ability of the Fund to continue to implement their investment strategies.

Additional Information About the Index, the Index Providers and the Index Calculation Agent

NASDAQ INC.

The Fund is not sponsored, endorsed, sold or promoted by The Nasdaq Inc. or its affiliates or subsidiaries. (The Nasdaq Inc., collectively with its affiliates and subsidiaries, are referred to as “Nasdaq”). Nasdaq has not passed on the legality or suitability of, or the accuracy or adequacy of descriptions and disclosures relating to, the Fund. Nasdaq makes no representation or warranty, express or implied, to the owners of the Fund or any member of the public regarding the advisability of investing in securities generally or in the Fund particularly. Nasdaq has no liability in connection with the administration, marketing or trading of the Fund. Nasdaq does not guarantee the accuracy or completeness of the date on which the intraday portfolio value (the “IPV”) calculations are based or the actual computation of the value of the IPV, nor shall Nasdaq be responsible for any delays in the computation or dissemination of the IPVs. Nasdaq makes no warranty, express or implied, as to results to be obtained by the Fund, or any other person or entity from the use of the IPVs or any data included therein. Nasdaq makes no express or implied warranties, and expressly disclaims all warranties of merchantability or fitness for a particular purpose or use with respect to the IPVs or any data included therein. Without limiting any of the foregoing, in no event shall Nasdaq have any liability for any lost profits or special, incidental, punitive, indirect, or consequential damages, even if notified of the possibility of such damages.

Portfolio Holdings Information

A description of the Trust’s policies and procedures with respect to the disclosure of the Fund’s portfolio holdings is available in the SAI.

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Board of Trustees and Officers

The Board is responsible for the general supervision of the Fund. The officers of the Trust are responsible for the day-to-day operations of the Fund.

Investment Advisor

ProShare Advisors, located at 7501 Wisconsin Avenue, Suite 1000E, Bethesda, Maryland 20814, serves as the investment adviser to the Fund and provides investment advice and management services to the Fund. ProShare Advisors oversees the investment and reinvestment of the assets in the Fund. Pursuant to an Investment Advisory and Management Agreement between ProShare Advisors and the Trust on behalf of the Fund, ProShare Advisors is responsible for substantially all expenses of the Fund (and substantially all expenses of any wholly owned subsidiary of the Fund, if any) except interest expenses, taxes, brokerage and other transaction costs, legal expenses, fees and expenses related to securities lending, compensation and expenses of the Independent Trustees, compensation and expenses of counsel to the Independent Trustees, compensation and expenses of the Trust’s chief compliance officer and his or her staff, future distribution fees or expenses, and extraordinary expenses. For its investment advisory and management services, the Fund pays ProShare Advisors a fee at an annualized rate of 0.58% of its average daily net assets. A discussion regarding the basis for the Board approving the investment advisory agreement for the Fund is expected to be included in the Trust’s annual report to shareholders dated May 31, 2021.

Portfolio Management

The following individuals have responsibility for the day-to-day management of the Fund as set forth in the Summary Prospectus relating to the Fund. The Portfolio Managers’ business experience for the past five years is listed below. Additional information about the Portfolio Managers’ compensation, other accounts managed by the Portfolio Managers and their ownership of other investment companies can be found in the SAI.

Michael Neches, ProShare Advisors: Senior Portfolio Manager since November 2010. ProFunds Advisors LLC: Senior Portfolio Manager since October. ProShare Capital Management LLC: Senior Portfolio Manager from June 2012 through September 2013.

Devin Sullivan, ProShare Advisors: Portfolio Manager since September 2016 and Associate Portfolio Manager from December 2011 to August 2016. ProFund Advisors: Portfolio Manager since September 2016 and Associate Portfolio Manager from December 2011 to August 2016.

Other Service Providers

SEI Investments Distribution Co. (the “Distributor”), located at One Freedom Valley Drive, Oaks, PA 19456, acts as the distributor and principal underwriter in all fifty states and the District of Columbia. JPMorgan Chase Bank, N.A.

(“JPMorgan”), located at One Beacon Street, 19th Floor, Boston, MA 02108, acts as the administrator to the Fund, providing operational and certain administrative services. In addition, JPMorgan acts as the Custodian and Index Receipt Agent. Citi Fund Services Ohio, Inc. (“Citi”), located at 4400 Easton Commons, Suite 200, Columbus, Ohio 43219, provides regulatory administration services to the Trust.

Additional Information

The Trust enters into contractual arrangements with various parties who provide services to the Fund including, ProShare Advisors, the Fund’s administrator and fund accounting agent, custodian, transfer agent, and distributor. Shareholders are not parties to, or intended (or “third-party”) beneficiaries of, any of those contractual arrangements, and those contractual arrangements are not intended to create in any individual shareholder or group of shareholders any right to enforce them against the service providers or to seek any remedy under them against the service providers, either directly or on behalf of the Trust.

This Prospectus provides information concerning the Trust and the Fund that you should consider in determining whether to purchase shares of the Fund. None of this Prospectus, the SAI or any contract that is an exhibit to the Trust’s registration statement, is intended to, nor does it, give rise to an agreement or contract between the Trust or the Fund and any investor, or give rise to any contract or other rights in any individual shareholder, group of shareholders or other person than any rights conferred explicitly by federal or state securities laws that may not be waived.

Determination of NAV

The NAV per share of 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 its total number of shares outstanding. Expenses and fees are accrued daily and taken into account for purposes of determining NAV. The NAV of the Fund is calculated by JPMorgan and is generally determined each business day as of the close of regular trading on the exchange on which the shares of the Fund are listed (typically calculated as of 4:00 p.m. Eastern Time). Securities and other assets are generally valued at their market value using information provided by a pricing service or market quotations. Securities that are listed or traded on a stock exchange or the Nasdaq or National Market System are generally valued at the closing price, if available, on the exchange or market where the security is principally traded (including the Nasdaq Official Closing Price). Short-term securities are generally valued using market prices or at amortized cost. In addition, certain derivatives linked to an index may be valued based on the performance of one or more U.S. ETFs or instruments that reflect the values of the securities in such index, when the level of the index is not computed as of the close of the U.S. securities markets. Routine valuation of certain derivatives is performed using procedures approved by the Board.

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When a market price is not readily available, securities and other assets are valued at fair value in good faith under procedures established by, and under the general supervision and responsibility of, the Board. The use of a fair valuation method may be appropriate if, for example: (i) ProShare Advisors believes market quotations do not accurately reflect fair value of an investment; (ii) ProShare Advisors believes an investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (for example, a foreign exchange or market); (iii) a trading halt closes an exchange or market early; or (iv) other events result in an exchange or market delaying its normal close. This procedure incurs the unavoidable risk that the valuation may be higher or lower than the securities might actually command if the Fund sold them. See the SAI for more details.

To the extent the Fund’s portfolio investments trade in markets on days or at times when the Fund is not open for business or when the primary exchange for the shares is not open, the value of the Fund’s assets may vary, shareholders may not be able to purchase or sell Fund shares and Authorized Participants may not be able to create or redeem Creation Units. In addition, certain portfolio investments may not be traded on days or at times the Fund is open for business. In particular, calculation of the NAV of the Fund may not take place contemporaneously with the determination of the prices of foreign securities used in NAV calculations.

Exchanges are open every week, Monday through Friday, except when the following holidays are celebrated: New Year’s Day, Martin Luther King, Jr. Day (the third Monday in January), President’s Day (the third Monday in February), Good Friday, Memorial Day (the last Monday in May), Independence Day, Labor Day (the first Monday in September), Thanksgiving Day (the fourth Thursday in November) and Christmas Day. An Exchange may close early on the business day before each of these holidays and on the day after Thanksgiving Day. Exchange holiday schedules are subject to change without notice. If the exchange or market on which the Fund’s investments are primarily traded closes early, the NAV may be calculated prior to its normal calculation time. Creation/redemption transaction order time cutoffs would also be accelerated.

Distributions

As a shareholder on the Fund record date, you will earn a share of the investment income and net realized capital gains, if any, derived from the Fund’s direct security holdings and derivative instruments. You will receive such earnings as either an income dividend or a capital gains distribution. The Fund intends to declare and distribute net investment income, if any, and net realized capital gains, if any, to its shareholders at least annually. Subject to Board approval, some or all of any net realized capital gains distribution may be declared payable in either additional shares of the distributing Fund or in cash.

If such a distribution is declared payable in that fashion, holders of shares will receive additional shares of the distributing Fund unless they elect to receive cash. Distributions may be declared and paid more frequently to comply with the distribution requirements of the Internal Revenue Code or for other reasons.

Dividend Reinvestment Services

As noted above under “Distributions”, the Fund may declare a distribution from net realized capital gains to be payable in additional shares or cash. Even if the Fund does not declare a distribution to be payable in shares, brokers may make available to their customers who own shares the DTC book-entry dividend reinvestment service. If this service is available and used, dividend distributions of both income and capital gains will automatically be reinvested in additional whole shares of the same Fund. Without this service, investors would have to take their distributions in cash. To determine whether the dividend reinvestment service is available and whether there is a commission or other charge for using this service, please consult your broker.

Frequent Purchases and Redemptions of Shares

The Board has not adopted a policy of monitoring for frequent purchases and redemptions of shares that appear to attempt to take advantage of potential arbitrage opportunities. The Board believes this is appropriate because ETFs, such as the Fund, are intended to be attractive to arbitrageurs, as trading activity is critical to ensuring that the market price of shares remains at or close to NAV.

Taxes

The following is certain general information about taxation of the Fund:

•The Fund intends to qualify for treatment as a “regulated investment company” (“RIC”) for U.S. federal income tax purposes. In order to so qualify, the Fund must meet certain tests with respect to the sources and types of its income, the nature and diversification of its assets, and the timing and amount of its distributions.

•If the Fund qualifies for treatment as a regulated investment company, it is not subject to federal income tax on net investment income and net realized capital gains that the Fund timely distributes to its shareholders. If the Fund were to fail to so qualify, and were ineligible to or otherwise did not cure such failure, its taxable income and gains would be subject to tax at the Fund level, and distributions from earnings and profits would be taxable to shareholders as ordinary income.

•Investments by the Fund in options, futures, forward contracts, swap agreements and other derivative financial instruments are subject to numerous special and complex tax rules. These rules could affect the amount, timing or character of the distributions to shareholders by the Fund.

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In addition, because the application of these rules may be uncertain under current law, an adverse determination or future Internal Revenue Service guidance with respect to these rules may affect whether the Fund has made sufficient distributions, and otherwise satisfied the relevant requirements, to maintain its qualification as a regulated investment company and avoid fund-level tax.

•Investments by the Fund in debt obligations issued or purchased at a discount and certain derivative instruments could cause the Fund to recognize taxable income in excess of the cash generated by such investments, potentially requiring the Fund to dispose of investments (including when otherwise disadvantageous to do so) in order to meet its distribution requirements, and such investments could affect the amount, timing or character of the income distributed to shareholders by the Fund. Investments by the Fund in shares of other investment companies could affect the amount, timing or character of the Fund’s distributions to shareholders relative to the Fund’s distributions had it invested directly in the securities held by the other investment companies.

•In order to qualify for the special tax treatment accorded a RIC and its shareholders, the Fund must derive at least 90% of its gross income for each taxable year from “qualifying income,” meet certain asset diversification tests at the end of each taxable quarter, and meet annual distribution requirements. The Fund’s pursuit of its investment strategies will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund can make certain investments, the treatment of which for these purposes is unclear. If, in any year, the Fund were to fail to qualify for the special tax treatment accorded a RIC and its shareholders, and were ineligible to or were not to cure such failure, the Fund would be taxed in the same manner as an ordinary corporation subject to U.S. federal income tax on all its income at the fund level. The resulting taxes could substantially reduce the Fund’s net assets and the amount of income available for distribution. In addition, in order to requalify for taxation as a RIC, the Fund could be required to recognize unrealized gains, pay substantial taxes and interest, and make certain distributions. Please see the Statement of Additional Information for more information.

Taxable investors should be aware of the following basic tax points:

•Distributions are taxable to you for federal income tax purposes whether you receive them in cash or reinvest them in additional shares.

•Distributions declared in October, November or December of one year payable to shareholders of record in such month and paid by the end of January of the following year are taxable for federal income tax purposes as if received on December 31 of the calendar year in which the distributions were declared.

•Any distributions from income or short-term capital gains that you receive generally are taxable to you as ordinary dividends for federal income tax purposes. Ordinary dividends you receive that the Fund reports as “qualified dividend income” may be taxed at the same rates as long-term capital gains, but will not be considered long-term capital gains for other federal income tax purposes, including the calculation of net capital losses.

•Any distributions of net long-term capital gains are taxable to you for federal income tax purposes as long-term capital gains includible in net capital gain and taxable to individuals at reduced rates, no matter how long you have owned your Fund shares.

•Distributions from net realized capital gains may vary considerably from year to year as a result of the Fund’s normal investment activities and cash flows.

•The Code generally imposes a 3.8% Medicare contribution tax on the “net investment income” of certain individuals, trusts and estates to the extent their income exceeds certain threshold amounts. For these purposes, “net investment income” generally includes, among other things, (i) distributions paid by the Fund of ordinary dividends and capital gain dividends, and (ii) any net gain from the sale, redemption or exchange of Fund shares. Shareholders are advised to consult their tax advisors regarding the possible implications of this additional tax on their investment in the Fund.

•A sale or exchange of Fund shares is a taxable event. This means that you may have a capital gain to report as income, or a capital loss to report as a deduction, when you complete your federal income tax return.

•Dividend and capital gain distributions that you receive, as well as your gains or losses from any sale or exchange of Fund shares, may be subject to state and local income taxes.

•Dividends paid to a shareholder that is not a “United States person” within the meaning of the Code (such a shareholder, a “foreign person”) that the Fund properly reports as capital gain dividends, short-term capital gain dividends or interest -related dividends, each as further defined in the SAI, are not subject to withholding of U.S. federal income tax, provided that certain other requirements are met. The Fund (or intermediary, as applicable) is permitted, but is not required, to report any part of its dividends as are eligible for such treatment. The Fund’s dividends other than those the Fund properly reports as capital gain dividends, short-term capital gain dividends or interest-related dividends generally will be subject to withholding of U.S. federal income tax at a rate of 30% (or lower applicable treaty rate). Special tax considerations may apply to foreign persons investing in the Fund. Please see the SAI for more information.

•The Fund’s income from or the proceeds of dispositions of its non-U.S. investments may be subject to withholding and

20 :: MANAGEMENT OF PROSHARES TRUST

PROSHARES.COM

other taxes imposed by foreign countries, which will reduce the Fund’s return on and taxable distributions in respect of its non-U.S. investments. Tax conventions between certain countries and the United States may reduce or eliminate these taxes. If more than 50% of the value of the Fund’s total assets at the close of a taxable year consists of securities of foreign corporations, the Fund will be eligible to elect to “pass through” to you foreign income taxes that it has paid. If this election is made, you will be required to include your share of those taxes in gross income as a distribution from the Fund and you generally will be allowed to claim a credit (or a deduction, if you itemize deductions) for these amounts on your federal U.S. income tax return, subject to certain limitations.

•By law, a percentage of your distributions and proceeds will generally be withheld if you have not provided a taxpayer identification number or social security number, have underreported dividend or interest income or have failed to certify to the Fund or its agent that you are not subject to this withholding.

In addition, taxable investors who purchase or redeem Creation Units should be aware of the following:

•A person who exchanges securities for Creation Units generally will recognize a gain or loss equal to the difference between the market value of the Creation Units at the time of the exchange and the exchanger’s aggregate basis in the securities surrendered and any cash amount paid.

•A person who exchanges Creation Units for securities generally will recognize a gain or loss equal to the difference between the exchanger’s basis in the Creation Units and the aggregate market value of the securities received and any cash received. However, all or a portion of any loss a person realizes upon an exchange of Creation Units for securities will be disallowed by the Internal Revenue Service if such person purchases other substantially identical shares of the Fund within 30 days before or after the exchange. In such case, the basis of the newly purchased shares will be adjusted to reflect the disallowed loss.

Note: This Prospectus provides general U.S. federal income tax information only. Your investment in the Fund may have other tax implications. If you are investing through a tax-

deferred retirement account, such as an individual retirement account (IRA), special tax rules apply. Please consult your tax advisor for detailed information about the Fund’s tax consequences for you. See “Taxation” in the SAI for more information.

Premium/Discount Information

The Trust’s website (www.proshares.com) has information about the premiums and discounts for the Fund. Premiums or discounts are the differences between the NAV and market price of the Fund on a given day, generally at the time NAV is calculated. A premium is the amount that the Fund is trading above the NAV. A discount is the amount that the Fund is trading below the NAV.

Escheatment

Many states have unclaimed property rules that provide for transfer to the state (also known as “escheatment”) of unclaimed property under various circumstances. These circumstances include inactivity (e.g., no owner-intiated contact for a certain period), returned mail (e.g., when mail sent to a shareholder is returned by the post office as undeliverable), or a combination of both inactivity and returned mail. Unclaimed or inactive accounts may be subject to escheatment laws, and the Fund and the Fund’s transfer agent will not be liable to shareholders and their representatives for good faith compliance with those laws.

Distribution (12b-1) Plan

Under a Rule 12b-1 Distribution Plan (the “Plan”) adopted by the Board, the Fund may pay the distributor and financial intermediaries, such as broker-dealers and investment advisors, up to 0.25% on an annualized basis of the average daily net assets of the Fund as reimbursement or compensation for distribution related activities with respect to the Fund. Because these fees would be paid out of the Fund’s assets on an on-going basis, over time these fees would increase the cost of your investment and may cost you more than paying other types of sales charges. For the prior fiscal year, no payments were made by the Fund under the Plan. No payments have yet been authorized by the Board, nor are any such expected to be made by the Fund under the Plan during the current fiscal year.

3	Summary Section
4	Nasdaq-100 Dorsey Wright Momentum ETF
9	Investment Objectives, Principal Investment Strategies and Related Risks
16	Management of ProShares Trust
17	Determination of NAV
18	Distributions
18	Dividend Reinvestment Services
18	Taxes
21	Financial Highlights