COLUMBIA SUSTAINABLE INTERNATIONAL EQUITY INCOME ETF (ESGN) Exchange: NYSE ARCA

The Fund uses an indexing investment approach that seeks to replicate the performance of the Index. The Fund invests at least 80% of its assets in the component securities of the Index and depositary receipts representing such securities (or if depositary receipts are component securities of the Index, then underlying stocks of such depositary receipts). The Index is owned and calculated by MSCI Inc. (MSCI or the Index Provider). The Index was developed by MSCI with input from Columbia Management Investment Advisers, LLC (the Investment Manager). The Index, which typically holds common stocks and depositary receipts, was constructed to provide exposure to foreign large- and mid-cap companies (located in developed markets) that are believed to offer sustainable levels of income, as well as total return opportunity. The Index holds and the Fund typically invests in foreign companies in at least three countries, other than the U.S. The Index is comprised of a subset of 100 companies within the MSCI World ex USA Index. Starting with the MSCI World ex USA Index, the Index was designed to reflect the performance of the top 100 (developed markets) foreign large- and mid-cap companies (excluding real estate investment trusts) ranked and weighted according to a composite factor score determined through the application of a systematic, rules-based methodology applied by MSCI. This methodology focuses on security dividend yield, dividend growth, and cash-based dividend coverage ratio factors. MSCI also screens companies for "sustainability" through the application of its Environmental, Social and Governance (ESG) rating methodology that is designed to exclude companies with unfavorable corporate ESG practices. The Index component securities are weighted based on the overall composite model scores and dividend yield. The Index is rebalanced on a quarterly basis in February, May, August and November. The Fund uses a replication strategy to track the performance of the Index, whereby the Fund invests in or has investment exposure to substantially all of the component securities of the Index in approximately the same proportions as in the Index. However, under various circumstances, including circumstances under which it may not be possible or practicable to purchase all of the securities in the Index, or in the same weightings, the Fund may purchase or have investment exposure to a sample of the securities in the Index in proportions expected to replicate generally the performance of the Index as a whole. There may also be instances in which the Fund may overweight (or underweight) an Index holding, purchase (or sell) instruments not in the Index as a substitute for one or more securities in the Index or utilize various combinations of other available investment techniques in seeking to replicate the performance of the Index. The Fund may sell securities or other holdings that are represented in the Index or purchase securities or make other investments that are not yet represented in the Index in anticipation of their removal from or addition to the Index by MSCI. The Investment Manager does not invest the Fund’s assets based on its view of the investment merits of a particular security or company, nor does it conduct fundamental investment research or analysis, or seek to forecast or otherwise consider market movements, conditions or trends in managing the Fund’s assets. The Fund pursues its investment objective of correlating performance with the Index regardless of market conditions and does not to take defensive positions. The methodology applied by MSCI to select Index holdings and weightings does not set limits on sector or industry exposures. To the extent the Index is concentrated in a particular sector or industry, the Fund will necessarily be concentrated in that sector or industry. As of October 31, 2018, the Index (and therefore the Fund) was concentrated in the industrials and materials sectors.