ProShares Nanotechnology ETF

SUMMARY PROSPECTUS

October 1, 2023

Nanotechnology ETF

This Summary Prospectus is designed to provide investors with key fund information in a clear and concise format. Before you invest, you may want to review the Fund’s Full Prospectus, which contains more information about the Fund and its risks. The Fund’s Full Prospectus, dated October 1, 2023, and Statement of Additional Information, dated October 1, 2023, and as each hereafter may be supplemented, are incorporated by reference into this Summary Prospectus. All of this information may be obtained at no cost either: online at ProShares.com/resources/prospectus_reports.html; by calling 866-PRO-5125 (866-776-5125); or by sending an email request to info@ProShares.com. The Securities and Exchange Commission has not approved or disapproved these securities or passed upon the adequacy of this Summary Prospectus. Any representation to the contrary is a criminal offense.

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Investment Objective

ProShares Nanotechnology ETF (the “Fund”) seeks investment results, before fees and expenses, that track the performance of the Solactive Nanotechnology 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 or hold 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	5 Years	10 Years
$59	$186	$324	$726

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. During the most recent fiscal year, the Fund’s annual portfolio turnover rate was 42% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests in financial instruments that ProShare Advisors believes, in combination, should track the performance of the Index.

The Index consists of companies focused on making or applying nanotechnology innovations that allow for improved products, processes, or techniques through control or measurement of material at nanoscale. The Index includes companies

exposed to nanotechnology through involvement in one or more of the following product or service areas:

•Production of nanotechnology, which can be defined as the use of matter on an atomic and molecular level

•Active in the fields of nanomedicine, nanomaterials, nanoelectronics, nanometrology or molecular nanotechnology

•Technologies that promote advances in or research related to nanotechnologies

The Index is constructed and maintained by Solactive AG (the “Index Provider”). At each Index reconstitution, the Index Provider uses an automated scan of company filings and other public information in search of terms and phrases which identify companies that have or are expected to have significant exposure to nanotechnology. The Index Provider then reviews each company and excludes any company that does not have relevant business exposure. The identified companies are then ranked based on the level of exposure to nanotechnology, as determined by the automated scan. The 30 companies ranked highest are selected into the Index. Selected companies are weighted based on market capitalization, subject to a maximum weight of 4.5% for any single company. The Index consists of U.S. and non-U.S. developed market companies that are listed on a stock exchange and meet certain market capitalization and liquidity requirements. The Index is reconstituted and rebalanced semiannually in May and November. Security weights are allowed to fluctuate between rebalance dates. The Index is published under the Bloomberg ticker symbol “SOLNANON.”

Under normal circumstances, the Fund will invest at least 80% of its total assets in component securities of the Index or in instruments with similar economic characteristics.

The Fund will invest principally in the financial instruments listed below.

•Equity Securities — 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

○Global Depositary Receipts (GDRs), which are receipts for shares in a foreign-based corporation traded in capital markets around the world.

ProShare Advisors uses a mathematical approach to investing in which it determines the type, quantity and mix of investment positions that it believes, in combination, the Fund should hold to produce returns consistent with its investment

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objective. The Fund seeks to remain fully invested at all times in financial instruments that, in combination, provide exposure consistent with the investment objective, without regard to market conditions, trends or direction. 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. For example, the Fund may utilize a representative sampling strategy when the Advisor believes a replication strategy might be detrimental or disadvantageous to shareholders, such as when buying each security in an Index is impracticable or inefficient, or when there are practical difficulties or additional costs involved in replicating an Index. The Fund also may use representative sampling if the Advisor believes one or more securities in the Index becomes illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations (such as tax diversification requirements) that apply to the Fund.

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

Principal Risks

•Nanotechnology Investing Risk — Nanotechnology is a relatively new form of technology and is subject to risks associated with a developing industry including limited product lines, markets, and financial resources as well as challenges to scalability of production. There is no guarantee that the products or services offered by companies in this business will be successful. Nanotechnology companies typically face intense competition, cyclical economic patterns, shifting consumer preferences, evolving industry standards, frequent new product introductions, evolving regulation, rapid changes in technology, loss or impairment of intellectual property rights, and potentially rapid product obsolescence. These companies may face increased scrutiny from regulators and legislators . They may be subject to scientific, technological and commercialization risks. Nanotechnology companies typically engage in significant amounts of spending on research and development. Such companies are also susceptible to operational and information security risks including those associated with hardware or software failures and security breaches.

•Unrelated Business Lines Risk – Companies in the Index may have significant business lines that are not nanotechnology related. These unrelated business lines may be a meaningful portion of a company’s current business, in terms of profit or revenue, for example, than the portion represented by the Index theme. Consequently, these unrelated busi

ness lines may have a significant impact on the performance of the company, the Index and the Fund. In particular, these unrelated business lines may cause the Fund to underperform investments that do not have exposure to unrelated business lines. For example, if an unrelated business line of a company underperforms its nanotechnology related business line, it may negatively affect the performance of the company, the Index and the Fund.

•Equity and Market Risk — Equity markets are volatile, and the value of equity securities 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.

•Foreign Investments Risk/Emerging Markets Risk — Exposure to securities of foreign issuers may provide the Fund with increased risk. Foreign investments 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.

Because the Fund’s foreign investment exposure may include issuers domiciled in developing or “emerging market” countries, all the aforementioned factors are heightened. Investments in emerging markets are considered speculative.

•Correlation Risk — A number of factors may affect the Fund’s ability to achieve a high degree of correlation with the Index. Fees, expenses, transaction costs, among other factors, will adversely impact the Fund’s ability to meet its investment objective. In addition, the Fund’s exposure may not be consistent with the Index. For example, the Fund may not have exposure to all of the securities in the Index, its weighting of securities may be different from that of the Index, and it may invest in instruments not included in the Index.

•Industry Concentration Risk — The Index may have a significant portion of its value in issuers 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. As of May 31, 2023, the Index had a significant portion of its value in issuers in the information technology and health care industry groups.

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○Health Care Industry Risk — Companies in this industry may experience: heavy dependence on patent protection; litigation and product liability expense; the long and costly process for obtaining new product approval by the Food and Drug Administration; and product obsolescence.

○Information Technology Industry Risk — Companies in this industry may experience: intense competition, obsolescence of existing technology, and changing economic conditions and government regulation.

•Geographic Concentration Risk — Because the Fund focuses its investments in one or more foreign countries, an investment in the Fund may be more volatile than a more geographically diversified fund. The performance of the Fund will be affected by the political, social and economic conditions in those foreign countries and subject to the related risks. As of May 31, 2023, the Index had a significant portion of its value in issuers in Japan.

○Japanese Investments Risk — Investments in Japan are subject to risks including, but not limited to (i) political, economic, or social instability in Japan; (ii) risks associated with Japan’s large government deficit; (iii) natural disasters particularly likely to occur in Japan; heavily dependent on international trade and reliant on imports for its commodity needs. Because of its trade dependence, the Japanese economy is particularly exposed to the risks of currency fluctuation, foreign trade policy and regional and global economic disruption, including the risk of increased tariffs, embargoes, and other trade limitations.

•Non-Diversification Risk — The Fund 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 used by the Fund may underperform other asset classes and may underperform other similar indices. The Index is maintained by a third party provider unaffiliated with the Fund or ProShare Advisors. There can be no guarantee that the methodology used by the third-party provider to identify companies whose business is nanotechnology related will achieve its intended result. Further, there can be no guarantee that the methodology underlying the Index or the daily calculation of the Index will be free from error.

•Market Price Variance Risk — Investors buy and sell Fund shares in the secondary market at market prices. Market prices 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.

•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. 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.

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

Investment Results

The bar chart below shows the Fund’s investment results during its first full calendar year of operations, and the table shows how the Fund’s average annual total returns for various periods compare with a broad measure market performance. This information provides some indication of the risks of investing in the Fund. Past results (before and after taxes) are not predictive of future results. Updated information on the Fund’s results can be obtained by visiting the Fund’s website (www.proshares.com).

Annual Returns as of December 31

Best Quarter	(ended	12/31/2022	):	11.21%
Worst Quarter	(ended	6/30/2022	):	-18.38%
Year-to-Date	(ended	6/30/2023	):	40.23%

Average Annual Total Returns

As of December 31, 2022

	One Year	Since Inception	Inception Date
Before Tax	-33.80%	-24.72%	10/26/2021
After Taxes on Distributions	-33.87%	-24.81%	—
After Taxes on Distributions and Sale of Shares	-19.97%	-18.72%	—
Solactive Nanotechnology Index1	-33.45%	-24.41%	—

Reflects no deduction for fees, expenses or taxes. Adjusted to reflect the reinvestment of dividends paid by issuers in the Index.

Average annual total returns are shown on a before- and after-tax basis for the Fund. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation

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and may differ from those shown. After-tax returns shown are not relevant to investors who hold shares through tax-deferred arrangements, such as a retirement account. After-tax returns may exceed the return before taxes due to a tax benefit from realizing a capital loss on a sale of shares.

Annual returns are required to be shown and should not be interpreted as suggesting that the Fund should or should not be held for longer periods of time.

Management

The Fund is advised by ProShare Advisors. Alexander Ilyasov, Senior Portfolio Manager, and Eric Silverthorne, Portfolio Manager, have jointly and primarily managed the Fund since September 2021 and March 2023, respectively.

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 finan

cial 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 Fund (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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Investment Company Act file number 811-21114

ProShares Trust
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