Summary Prospectus by Investment Company (Form 497K)

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

Other Expenses

5 Years

10 Years

Concentration Risk. The Fund may be susceptible to an increased risk of loss, including losses due to adverse events that affect the Fund's investments more than the market as a whole, to the extent that the Fund's investments are concentrated in the securities of particular issuers, country, group of countries, region, market, industry, group of industries, sector, market segment or asset class.

Banking Industry Risk. Performance of companies in the banking industry may be adversely impacted by many factors, including, among others, changes in government regulations, economic conditions, and interest rates, credit rating downgrades, and decreased liquidity in credit markets. Extensive governmental regulations may limit the amounts and types of loans and other financial commitments companies in the banking industry can make, the interest rates and fees they can charge, the scope of their activities, the prices they can charge and the amount of capital they must maintain. Profitability is heavily dependent on the availability and cost of capital funds and can fluctuate significantly when interest rates change or due to increased competition. Credit losses resulting from financial difficulties of borrowers can negatively impact banking companies. The extent to which the Fund may invest in a company that engages in securities-related activities or banking is limited by applicable law. The impact of changes in capital requirements and recent or future regulation of any individual banking company, or of the financials sector as a whole, cannot be predicted. In recent years, cyberattacks and technology malfunctions and failures have become increasingly frequent in this industry and have caused significant losses to companies in this industry, which may negatively impact the Fund.

Equity Market Risk. The equity securities held in the Fund's portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific industries, sectors or companies in which the Fund invests. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change. The Fund's NAV and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.

Active Management Risk. The Fund is actively-managed and may not meet its investment objective based on the Adviser's success or failure to implement investment strategies for the Fund. The success of the Fund's investment program depends largely on the investment techniques applied by the Adviser. It is possible the investment techniques employed on behalf of the Fund will not produce the desired results.

Sector Risk. To the extent the Fund invests more heavily in the financials sector of the economy, and its performance will therefore be especially sensitive to developments that significantly affect that sector.

Financials Sector Risk. Performance of companies in the financials sector may be adversely impacted by many factors, including, among others, changes in government regulations, economic conditions, and interest rates, credit rating downgrades, and decreased liquidity in credit markets. The extent to which the Fund may invest in a company that engages in securities-related activities or banking is limited by applicable law. The impact of changes in capital requirements and recent or future regulation of any individual financial company, or of the financials sector as a whole, cannot be predicted. In recent years, cyberattacks and technology malfunctions and failures have become increasingly frequent in this sector and have caused significant losses to companies in this sector, which may negatively impact the Fund.

Bank Crisis Risk. Economic downturns and changes in monetary policies could potentially impact G-SIBs or the banking industry negatively. Until 2022, most U.S. banks allocated their reserves to low-yielding government securities, encompassing Agency Mortgage-Backed and U.S. Treasury Securities. However, the Federal Reserve's decision to increase interest rates in 2022 led to a large decrease in bond prices. This development eroded the value of bank capital reserves, driving some banks into the sphere of unrealized losses.

Further stress was added to the industry when Silvergate Bank announced its plan to liquidate in March 2023. This triggered widespread panic leading to a series of bank runs, beginning with Silicon Valley Bank, progressing to Signature Bank, and then at First Republic Bank. In response to this potential systemic threat, global industry regulators intervened, providing liquidity to government securities and facilitating acquisitions within the banking industry to restore confidence.

The regional banking crisis in the U.S. triggered unease among international investors, leading to apprehension regarding other potentially unstable banks. Consequently, Credit Suisse's share price saw a significant decline. In an effort to reinforce investor confidence and bring stability, the Swiss government, in collaboration with the Financial Market Supervisory Authority, oversaw Credit Suisse's acquisition by UBS. Despite the status of G-SIBs, there is no guarantee that G-SIBs can withstand a banking crisis better than other banking institutions.

Currency Risk. The Fund may invest in securities denominated in foreign currencies. Because the Fund's NAV is determined in U.S. dollars, the Fund's NAV could decline if currencies of the underlying securities depreciate against the U.S. dollar or if there are delays or limits on repatriation of such currencies. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the Fund's NAV may change quickly and without warning, which could have a significant negative impact on the Fund.

Depositary Receipts Risk. Depositary receipts (e.g., ADRs and GDRs) which involve similar risks to those associated with investments in foreign securities. Investments in depositary receipts may be less liquid than the underlying shares in their primary trading market. The issuers of depositary receipts may discontinue issuing new depositary receipts and withdraw existing depositary receipts at any time, which may result in costs and delays in the distribution of the underlying assets to the Fund and may negatively impact the Fund's performance.

Emerging Markets Risk. Investments in securities and instruments traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, or regulatory conditions not associated with investments in U.S. securities and instruments or investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Shares and cause the Fund to decline in value. Less developed markets are more likely to experience problems with the clearing and settling of trades and the holding of securities by local banks, agents and depositories.

Foreign Securities Risk. The Fund's investments in foreign securities can be riskier than U.S. securities investments. Investments in the securities of foreign issuers (including investments in ADRs and GDRs) are subject to the risks associated with investing in those foreign markets, such as heightened risks of inflation or nationalization. The prices of foreign securities and the prices of U.S. securities have, at times, moved in opposite directions. In addition, securities of foreign issuers may lose value due to political, economic and geographic events affecting a foreign issuer or market. During periods of social, political or economic instability in a country or region, the value of a foreign security traded on U.S. exchanges could be affected by, among other things, increasing price volatility, illiquidity, or the closure of the primary market on which the security (or the security underlying the ADR or GDR) is traded. You may lose money due to political, economic and geographic events affecting a foreign issuer or market.

Geographic Risk. A natural, biological or other disaster could occur in a geographic region in which the Fund invests, which could affect the economy or particular business operations of companies in the specific geographic region, causing an adverse impact on the Fund's investments in the affected region or in a region economically tied to the affected region. The securities in which the Fund invests and, consequently, the Fund are also subject to specific risks as a result of their business operations, including, but not limited to:

Risk of Investing in Developed Markets. The Fund's investment in a developed country issuer may subject the Fund to regulatory, political, currency, security, economic and other risks associated with developed countries. Developed countries tend to represent a significant portion of the global economy and have generally experienced slower economic growth than some less developed countries. Certain developed countries have experienced security concerns, such as terrorism and strained international relations. Incidents involving a country's or region's security may cause uncertainty in its markets and may adversely affect its economy and the Fund's investments. In addition, developed countries may be impacted by changes to the economic conditions of certain key trading partners, regulatory burdens, debt burdens and the price or availability of certain commodities.

Risk of Investing in North America. A decrease in imports or exports, changes in trade regulations or an economic recession in any North American country can have a significant economic effect on the entire North American region and on some or all of the North American countries to which the Fund has economic exposure. The U.S. is Canada's and Mexico's largest trading and investment partner. The Canadian and Mexican economies are significantly affected by developments in the U.S. economy. Since the implementation of the North American Free Trade Agreement ("NAFTA") in 1994 among Canada, the U.S. and Mexico, total merchandise trade among the three countries has increased. However, political developments in the U.S., including the renegotiation of NAFTA and imposition of tariffs by the U.S., may have implications for the trade arrangements among the U.S., Mexico and Canada, which could negatively affect the value of securities held by the Fund. Policy and legislative changes in any of the three countries may have a significant effect on North American economies generally, as well as on the value of certain securities held by the Fund.

Risk of Investing in Asia. Many Asian economies have experienced rapid growth and industrialization in recent years, but there is no assurance that this growth rate will be maintained. Other Asian economies, however, have experienced high inflation, high unemployment, currency devaluations and restrictions, and over-extension of credit. Geopolitical hostility, political instability, as well as economic or environmental events in any one Asian country may have a significant economic effect on the entire Asian region, as well as on major trading partners outside Asia. Any adverse event in the Asian markets may have a significant adverse effect on some or all of the economies of the countries in which the Fund invests. Many Asian countries are subject to political risk, including political instability, corruption and regional conflict with neighboring countries. North Korea and South Korea each have substantial military capabilities, and historical tensions between the two countries present the risk of war. Escalated tensions involving the two countries and any outbreak of hostilities between the two countries, or even the threat of an outbreak of hostilities, could have a severe adverse effect on the entire Asian region. Certain Asian countries have also developed increasingly strained relationships with the U.S., and if these relations were to worsen, they could adversely affect Asian issuers that rely on the U.S. for trade. In addition, many Asian countries are subject to social and labor risks associated with demands for improved political, economic and social conditions.

Risk of Investing in China. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China's primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund's investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.

International Closed Market Trading Risk. To the extent that the underlying investments held by the Fund trade on foreign exchanges that may be closed when the securities exchange on which the Fund's Shares trade is open, there are likely to be deviations between the current price of such an underlying security and the last quoted price for the underlying security (i.e., the Fund's quote from the closed foreign market). These deviations could result in premiums or discounts to the Fund's NAV that may be greater than those experienced by other ETFs.

ETF Risks. The Fund is an ETF and, as a result of an ETF's structure, is exposed to the following risks:

Authorized Participants ("APs"), Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, shares of the Fund may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

Costs of Buying or Selling Shares of the Fund. Due to the costs of buying or selling shares of the Fund, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of shares of the Fund may significantly reduce investment results and an investment in shares of the Fund may not be advisable for investors who anticipate regularly making small investments.

Shares of the Fund May Trade at Prices Other Than NAV. As with all ETFs, shares of the Fund may be bought and sold in the secondary market at market prices. The price of shares of the Fund, like the price of all traded securities, will be subject to factors such as supply and demand, as well as the current value of the Fund's portfolio holdings. Although it is expected that the market price of the shares of the Fund will approximate the Fund's NAV, there may be times when the market price of the shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount). This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for shares in the secondary market, in which case such premiums or discounts may be significant.

Trading. Although shares of the Fund are listed for trading on a national securities exchange, such as The NASDAQ Stock Market LLC (the "Exchange"), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that shares of the Fund will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of shares of the Fund may begin to mirror the liquidity of the Fund's underlying portfolio holdings, which can be significantly less liquid than shares of the Fund, and this could lead to differences between the market price of the shares of the Fund and the underlying value of those shares.

Non-Diversification Risk. Although the Fund intends to invest in a variety of securities, the Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund's volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund's performance.

Large-Capitalization Investing Risk. The Fund's performance may be adversely affected if securities of large-capitalization companies underperform securities of smaller-capitalization companies or the market as a whole. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion.

Mid-Capitalization Companies Risk. Mid-capitalization companies may have greater price volatility, lower trading volume and less liquidity than large-capitalization companies. In addition, mid-capitalization companies may have smaller revenues, narrower product lines, less management depth and experience, smaller shares of their product or service markets, fewer financial resources and less competitive strength than large-capitalization companies.

Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund's ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially.

Operational Risk. The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error, processing and communication errors, errors of the Fund's service providers, counterparties or other third parties, failed or inadequate processes and technology or systems failures. The Fund and the Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address significant operational risks.

Cybersecurity Risk. Failures or breaches of the electronic systems of the Fund and/or the Fund's service providers, including the Adviser, Index Provider, market makers, Authorized Participants or the issuers of securities in which the Fund invests have the ability to cause disruptions, negatively impact the Fund's business operations and/or potentially result in financial losses to the Fund and its shareholders. While the Fund has established business continuity plans and risk management systems seeking to address system breaches or failures, there are inherent limitations in such plans and systems. Furthermore, the Fund cannot control the cybersecurity plans and systems of the Fund's Index Provider, Adviser, other service providers, market makers, Authorized Participants or issuers of securities in which the Fund invests.

Liquidity Risk. The Fund's investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash.

Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.

Themes Global Systemically Important Banks ETF

Since Inception

(December 15, 2023)

Return After Taxes on Distributions and Sale of Shares

MSCI ACWI Index

(reflects no deduction for fees, expenses, or taxes)

KBW Nasdaq Global Bank Index

(reflects no deduction for fees, expenses, or taxes)