Oppenheimer

International Revenue ETF

Cusip

68386C757

BATS BZX Exchange, Inc.

REFA

Summary Prospectus        October 27, 2017

Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus, Statement of Additional Information, Annual Report and other information about the Fund online at https://www.oppenheimerfunds.com/investors/funds/etf. You can also get this information at no cost by calling 1.800.225.5677 or by sending an email request to: info@oppenheimerfunds.com.

The Fund’s prospectus and Statement of Additional Information (“SAI”), both dated October 27, 2017, and through page 72 of its most recent Annual Report, dated June 30, 2017, are incorporated by reference into this Summary Prospectus. You can access the Fund’s prospectus and SAI at https://www.oppenheimerfunds.com/investors/funds/etf. The Fund’s prospectus is also available from financial intermediaries who are authorized to sell Fund shares.

Investment Objective. Oppenheimer International Revenue ETF (the “Fund”) seeks to provide investment results that correspond generally, before fees and expenses, to the performance of the OFI Revenue Weighted International Index (the “Underlying Index”).

Fees and Expenses. The following table describes the fees and expenses you may pay if you buy and hold shares of the Fund (“Shares”). You may also incur customary brokerage charges when buying or selling Fund Shares.

Annual Fund Operating Expenses¹

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

Management Fees	0.42%
Other Expenses2	0.00%
Total Annual Fund Operating Expenses	0.42%

1.	Expenses have been restated to reflect current fees.
2.	“Other Expenses” are based on estimated amounts for the current fiscal year.

Example. The following 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 the Shares at the end of those periods. This example assumes that the Fund provides a return of 5% a year and that operating expenses remain the same. This example does not include the brokerage commission that you may pay to buy and sell exchange-traded Shares of the Fund. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

	1 Year	3 Years
Oppenheimer International Revenue ETF	$43	$135

Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities or other instruments. A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance.

Principal Investment Strategies. The Fund seeks investment results that correspond generally, before fees and expenses, to the performance of the Underlying Index. Under normal circumstances, the Fund will invest at least 80% of its net assets, plus any borrowings for investment purposes, in securities of companies included in the Underlying Index, and generally expects to be substantially invested at such times, with at least 95% of its net assets invested in these securities. The Fund may invest up to 20% of its assets in certain index futures, options, options on index futures, swap contracts or other derivatives, as related to its Underlying Index and its component securities, other securities not included in the

Underlying Index and cash and cash equivalents, including shares of money market funds advised by the investment adviser or its affiliates, to the extent the investment adviser believes such investments will help the Fund track the Underlying Index.

The Underlying Index is constructed using a rules-based methodology that re-weights the constituent securities of the MSCI EAFE Index (the “Parent Index”) according to the revenue earned by the companies in the Parent Index, subject to a maximum 5% per company weighting. Thus, the Underlying Index contains the same securities as the Parent Index, but in different proportions. The Underlying Index is expected to contain between 400 and 600 securities, but this number may change. The Underlying Index is reconstituted quarterly.

Since the Underlying Index will be constructed based on securities in the Parent Index, it will primarily consist of securities from developed markets around the world, excluding the United States and Canada. It may include securities of foreign companies other than developed markets around the world and companies of any market capitalization, including medium capitalization companies. With respect to securities of foreign companies, the Fund may achieve its exposure either directly or through depositary receipts. The Parent Index includes stocks from Europe, Australasia and the Far East. Consistent with the attributes of the Parent Index, the Fund invests in issuers that maintain their principal place of business or conduct their business activities outside the U.S., issuers that have their securities traded on non-U.S. exchanges or issuers that have been formed under the laws of non-U.S. countries.

The investment adviser uses a “passive” or indexing approach to try to achieve the Fund’s investment objective. Due to the large number of constituent securities in the Parent Index, the Fund utilizes a “representative sampling” strategy whereby the Fund would hold a significant number of the component securities of the Underlying Index, but may not track that index with the same degree of accuracy as would an investment vehicle replicating the entire index. This is designed to improve liquidity and reduce portfolio turnover. The number of holdings may increase or the Fund may switch to full replication in the future.

The Fund does not try to outperform the index it tracks and does not seek temporary defensive positions when markets decline or appear overvalued.

The Fund will typically concentrate its investments in a particular industry or group of industries to approximately the same extent that its Underlying Index is concentrated, meaning that it may invest more than 25% of its net assets in that industry or group of industries.

The Underlying Index is sponsored by MSCI, Inc. (the “Index Provider”), which is unaffiliated with the Fund and the investment adviser. The Index Provider determines the composition and relative weightings of the securities in the Underlying Index and publishes information regarding the market value of the Underlying Index.

The Fund may lend securities representing up to one-third of the value of the Fund’s total assets (including the value of any collateral received).

Principal Risks. Like all investments, investing in the Fund entails risks, including the risk that you may lose part or all of the money you invest.

Concentration Risk. The Fund will typically concentrate in industries or groups of industries to approximately the same extent as its Underlying Index. The Fund may be adversely affected by the performance of the securities in a particular industry or group of industries and may be subject to increased price volatility and may be more susceptible to adverse economic, market, political or regulatory occurrences affecting that market, industry, group of industries, sector or asset class than may be the case for a fund that was not concentrated in a particular industry or group of industries.

Depositary Receipt Risk. Changes in foreign currency exchange rates affect the value of American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”), European Depositary Receipts (“EDRs”) and global shares (“Global Shares”) and, therefore, the value of the Fund’s portfolio. ADRs, GDRs and EDRs represent ownership interests in shares of foreign companies that are held in financial institution custodial accounts, and are traded on exchanges in the United States and around the world. Global Shares are the actual (ordinary) shares of a non-U.S. company, which trade both in the home market and the U.S. and are represented by the same share certificate in both the U.S. and the home market. In addition, although the ADRs, GDRs, EDRs and Global Shares in which the Fund invests may be listed on major U.S. or foreign exchanges, there can be no assurance that a market for these securities will be made or maintained or that any such market will be or remain liquid. There is also no guarantee that a financial institution will continue to sponsor particular ADRs, GDRs or EDRs. As a result, the Fund may have difficulty selling securities, or selling them quickly and efficiently at the prices at which they have been valued.

Eurozone Investment Risk. The Fund’s investments in the Eurozone may be subject to a greater risk than investments in other geographic regions. The recent global economic crisis that began in 2008 has caused severe financial difficulties for many European Union (“EU”) countries, pushing some to the brink of insolvency and causing others to experience recession, large public debt, restructuring of government debt, credit rating downgrades and an overall weakening of banking and financial sectors. Some of those countries have depended on, and may continue to depend on, the assistance from others, such as the European Central Bank, the International Monetary Fund, or other governments and institutions, to address those issues. By adopting the euro as its currency, members of the European Monetary Union (“EMU”) are subject to fiscal and monetary controls that could limit to some degree the ability to implement their own economic policies. Additionally, EMU member countries could voluntarily abandon the euro or involuntarily be forced out of the euro, including by way of a partial or complete dissolution of the EMU. The effects of such outcomes on the rest of the Eurozone and the global markets as a whole are unpredictable, but are likely to be negative, and may adversely impact

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market values of Eurozone and various other securities and currencies, cause redenomination of certain securities into less valuable local currencies, and result in more volatile and illiquid markets.

Foreign Currency Risk. Changes in foreign currency exchange rates affect the value of investments denominated in a foreign currency, and therefore, the value of the Fund’s portfolio. Generally, when the U.S. dollar rises in value against a foreign currency, a security denominated in that currency loses value because the currency is worth fewer U.S. dollars. Conversely, when the U.S. dollar decreases in value against a foreign currency, a security denominated in that currency gains value because the currency is worth more U.S. dollars. Risks related to foreign currencies also include those related to economic or political developments, market inefficiencies or a higher risk that essential investment information may be incomplete, unavailable or inaccurate.

Foreign Market Risk. Because foreign securities in the Fund’s portfolio trade on foreign exchanges at times when the U.S. markets are not open for trading, the value of those securities may change materially at times when the U.S. markets are not open for trading, regardless of whether there is an active U.S. market for Shares. Conversely, Shares of the Fund may trade on U.S. exchanges at times when foreign exchanges are not open for trading. This, in either case, could lead to a difference between the U.S. market value of the Shares and the underlying value of the Fund’s portfolio.

Foreign Securities Risk. Investments in the securities of foreign companies may be more volatile because of economic or political developments, public health and safety issues, demographic changes, market inefficiencies, lack of regulatory oversight, government debt burdens, or a higher risk that essential investment information may be incomplete, unavailable, or inaccurate. Restrictions on currency trading may be imposed by foreign countries, which may adversely affect the value of the Fund’s portfolio securities. Certain of the risks associated with foreign investments are heightened for investments in emerging market countries.

Geographic Focus Risk. To the extent the Fund focuses on companies in a specific country or region, the Fund is subject to greater risks of adverse developments in that country or region and/or the surrounding countries or regions than a fund that is more broadly diversified geographically. Political, social or economic disruptions in the country or region, even in countries in which the Fund is not invested, may adversely affect the value of securities values held by the Fund.

Medium Capitalization Stock Risk Medium capitalization companies (including those trading as ADRs, GDRs, EDRs and Global Shares) may have an unproven or narrow technological base and limited product lines, distribution channels, markets and financial resources. Medium capitalization companies also may be dependent on entrepreneurial management, making the companies more susceptible to certain setbacks and reversals. Securities of medium capitalization companies may also be more sensitive to changes in the economy, such as changes in the level of interest rates. As a result, the securities of medium capitalization companies may be subject to more abrupt or erratic price movements than securities of larger companies, may have limited marketability, and may be less liquid than securities of companies with larger capitalizations.

Stock Market Risk. Stock market risk is the risk that broad movements in financial markets will adversely affect the price of the Fund’s investments, regardless of how well the companies in which the Fund invests perform. There is also a risk that the price of one or more of the securities or other instruments in the Fund’s portfolio will fall.

Industrials Sector Risk. The Fund invests a significant portion of its assets in securities issued by companies in the industrials sector in order to track the Underlying Index’s allocation to that sector. The industrials sector includes companies engaged in the manufacture and distribution of capital goods, such as those used in defense, construction and engineering, companies that manufacture and distribute electrical equipment and industrial machinery and those that provide commercial and transportation services and supplies. Because as currently constituted the industrials sector represents a significant portion of the Underlying Index, the Fund will be sensitive to changes in, and its performance may depend to a greater extent on, the overall condition of the industrials sector. Companies in the industrials sector may be adversely affected by changes in government regulation, world events and economic conditions. In addition, companies in the industrials sector may be adversely affected by environmental damages, product liability claims and exchange rates.

Consumer Discretionary Sector Risk The success of consumer product manufacturers and retailers is tied closely to the performance of the domestic and international economy, employment, wage growth, monetary policy impacting interest rates, competition and consumer confidence. Success depends heavily on disposable income and consumer spending habits. Also, companies in the consumer discretionary sector may be subject to fierce competition, exacerbated by the shift toward online shopping. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products and services in the marketplace.

Financials Sector Risk Financial services companies are subject to extensive governmental regulation, which may limit both the amounts and types of loans and other financial commitments they can make, and the interest rates and fees they can charge. Government regulation may also adversely affect the scope of their activities and the amount of capital they must maintain. Profitability is largely 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 and financial losses associated with investment activities can negatively impact the sector. Insurance companies may be subject to severe price competition and/or rate regulation, which may have an adverse impact on their profitability.

Deterioration of credit markets, such as that which occurred in 2008 and 2009, can have an adverse impact on a broad range of financial markets, causing certain financial services companies to incur large losses. In these conditions, financial services companies may experience significant declines in the valuation of their assets, take actions to raise capital and even cease operations. Some financial services companies may also be required to accept or borrow significant amounts

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of capital from government sources and may face future government imposed restrictions on their businesses or increased government intervention, although there is no guarantee that governments will provide such relief in the future. These actions may cause the securities of many financial services companies to decline in value.

In response to the financial crisis in 2008 and 2009, the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”) was enacted into federal law on July 21, 2010, in large part to provide increased regulation of financial institutions. The Dodd-Frank Act has had and will continue to have for years to come a broad impact on virtually all participants in the financial services industry. Government regulation may change frequently and may have significant adverse consequences for companies in the financials sector, including effects not intended by such regulation. Government regulation also may have adverse effects on certain issuers, such as decreased profits or revenues. The impact of recent or future regulation in various countries on any individual financial company or on the sector as a whole cannot be predicted.

Authorized Participant Concentration Risk. Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of intermediaries that act as authorized participants and none of these authorized participants is or will be obligated to engage in creation or redemption transactions. To the extent that these intermediaries exit the business or are unable to or choose not to proceed with creation and/or redemption orders with respect to the Fund and no other authorized participant is able to step forward to create or redeem Shares may trade at a discount to NAV or IIV, and the Fund may possibly face delisting.

Increased Volatility Risk. Increased volatility may result from increased cash flows to the Fund and other market participants that continuously or systematically buy large holdings of small and medium capitalization companies (including those trading as ADRs, GDRs, EDRs and Global Shares), which can drive prices up and down more dramatically. Additionally, the announcement that a security has been added to a widely followed index or benchmark may cause the price of that security to increase. Conversely, the announcement that a security has been deleted from a widely followed index or benchmark may cause the price of that security to decrease.

Investment Approach Risk. The Underlying Index, and thus the Fund, seeks to provide exposure to investments based on a specific selection criteria and a revenue weighting approach. There can be no assurance that the selection criteria and weighting approach will enhance the Fund’s performance over time. It is expected that exposure to such investment criteria and weighting will detract from performance in some market environments, perhaps for extended periods. In such circumstances, the Fund’s investment adviser will not adjust the Fund’s investment process to target different criteria or weighting processes.

Market Trading Risk. An investment in the Shares may present secondary market trading risks, including the inability to sell your Shares in the event of a severe market disruption, or the inability to buy and sell Shares at a price that reflects the actual value of the Fund’s portfolio. Although it is expected that Shares will remain listed for trading on Bats BZX Exchange, Inc. (“Bats Exchange,” and along with NYSE Arca, Inc., each the “Exchange”), disruptions to creations and redemptions, the existence of market volatility or lack of an active trading market for the Shares (including through a trading halt), as well as other factors, may result in the Shares trading significantly above (at a premium to) or below (at a discount to) the Fund’s net asset value (“NAV”) (calculated at the end of the day), or the intraday value of the Fund’s published basket of portfolio securities (i.e., the “intraday indicative value” or “IIV”). During such periods, you may be unable to sell your Shares or may incur significant losses if you sell your Shares. In addition, during such periods, such as a “flash crash,” different investment strategies or techniques, such as stop loss orders to sell your Shares, may not work as intended and may result in significant losses.

Non-Correlation Risk. The Fund’s return may not match the return of the Underlying Index for a number of reasons. For example, the Fund incurs a number of operating expenses, while the Underlying Index does not. Tracking error may also occur because of differences between the securities or other instruments held in the Fund’s portfolio and those included in the Underlying Index, pricing differences, transaction costs, the Fund’s holding of uninvested cash, differences in the timing of the accrual of dividends or interest, tax gains or losses, changes to the Underlying Index, or the need to meet various new or existing regulatory requirements. This risk may be heightened during times of increased market volatility or other unusual market conditions.

Calculation Methodology Risk The Underlying Index relies on various sources of information to assess the criteria of issuers included in the Underlying Index (or its Parent Index), including information that may be based on assumptions and estimates. Neither the Fund nor the investment adviser can offer assurances that the Underlying Index’s calculation methodology or sources of information will provide an accurate assessment of included issuers.

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 investment 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 these risks.

Passive Investment Risk. The Fund is not actively managed and therefore the investment adviser does not have discretion to select an Underlying Index’s components or change an Underlying Index methodology. The Fund generally does not attempt to take defensive positions under any market conditions, including declining markets. A general decline in the market segments included in the Underlying Index may adversely affect the Fund’s performance.

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Securities Lending Risk Securities lending involves the risk that the Fund may lose money because the borrower of the Fund’s loaned securities fails to return the securities in a timely manner or at all and the securities lending agent fails to fulfill its guarantee to the Fund against that risk. The Fund could also lose money in the event of a decline in the value of the collateral provided for loaned securities or a decline in the value of any investments made with cash collateral. The Fund’s securities lending activities could also trigger adverse tax consequences for the Fund and affect the amount, timing and character of distributions to the shareholders.

Portfolio Turnover Risk. Because the Fund is rebalanced and reconstituted quarterly, the Fund may experience portfolio turnover in excess of 100%. Portfolio turnover may involve the payment by the Fund of brokerage and other transaction costs on the sale of securities, as well as on the investment of the proceeds in other securities. The greater the portfolio turnover, the greater the transaction costs to the Fund, which could have an adverse effect on the Fund’s total rate of return, and the more likely the Fund is to generate capital gains that must be distributed to shareholders as taxable income.

An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

The Fund’s Past Performance. There is no performance information presented for the Fund because the Fund has not completed a calendar year of operations as of the date of this Prospectus.

Investment Adviser. OFI Advisors, LLC (the “Manager”) is the Fund’s investment adviser.

Portfolio Managers. Frank Vallario has been Vice President of the Fund since October 2017 and portfolio manager of the Fund since August 2017. Sean P. Reichert has been Vice President and portfolio manager of the Fund since its inception.

Purchase and Sale of Fund Shares Unlike conventional mutual funds, the Fund issues and redeems Shares on a continuous basis, at NAV, only in Creation Units consisting of 100,000 Shares. The Fund generally will issue or redeem Creation Units in return for a designated portfolio of securities (and an amount of cash) that the Fund specifies each day. Individual Shares may only be purchased and sold on the Exchange through a broker-dealer. Shares will trade at market prices rather than at NAV or IIV. As such, Shares may trade at a price greater than NAV or IIV (premium) or less than NAV or IIV (discount).

Taxes. The Fund’s distributions generally are taxable to you as ordinary income, capital gains, or some combination of both, unless you are investing through a tax-deferred arrangement, in which case your distributions generally will be taxed when withdrawn from the tax-deferred account.

Payments to Broker-Dealers and Other Financial Intermediaries. If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), OppenheimerFunds Distributor, Inc. may pay the intermediary for the sale of Shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other financial intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

For More Information About Oppenheimer International Revenue ETF

You can access the Fund’s prospectus and SAI at https://www.oppenheimerfunds.com/investors/funds/etf. You can also request additional information about the Fund or your account:

Telephone:	Call OppenheimerFunds Services toll-free: 1.800.CALL OPP (1.800.225.5677)
Mail:	For requests by mail: OppenheimerFunds Services P.O. Box 5270 Denver, Colorado 80217-5270	For requests by courier or express mail: OppenheimerFunds Services 12100 East Iliff Avenue Suite 300 Aurora, Colorado 80014
Internet:	You may request documents, and read or download certain documents at www.oppenheimerfunds.com

PR2672.001.1017