The first paragraph under "How the Fund Differs from Traditional Mutual Funds - Redeemability"is hereby replaced in its entirety with the following:
Redeemability.Traditional mutual fund shares may be bought from, and redeemed with, the issuing fund for cash at NAV typically calculated once at the end of each business day. Shares of an ETF, by contrast, cannot be purchased from or redeemed with the ETF except by or through Authorized Participants, and then typically for an in-kind basket of securities. Except when aggregated in Creation Units, the Fund shares are not redeemable securities of the Fund. In addition, ETFs issue and redeem shares on a continuous basis only in large blocks of shares, typically 25,000 shares (which is the case for the Fund), called Creation Units.
The subsection "How the Fund Differs from ETFs that Disclose their Portfolio Holdings Daily"is hereby deleted in its entirety.
The heading "Permissible Investments and Other Policies"is hereby replaced with "Additional Investment Strategies and Policies."All information under the former heading "Permissible Investments and Other Policies"is restated as follows:
Additional Investment Strategies and Policies
This section describes certain investment strategies and policies that the Fund may utilize in pursuit of its investment objective and some additional factors and risks involved with investing in the Fund.
Investing Defensively
The Fund may from time to time take temporary defensive investment positions that may be inconsistent with the Fund's principal investment strategies in attempting to respond to adverse market, economic, political, social or other conditions, including, without limitation, investing some or all of its assets in money market instruments or shares of affiliated or unaffiliated government money market funds or holding some or all of its assets in cash or cash equivalents. The Fund may take such defensive investment positions for as long a period as deemed necessary.
The Fund may not achieve its investment objective while it is investing defensively. Investing defensively may adversely affect Fund performance. During these times, the portfolio managers may make frequent portfolio holding changes, which could result in increased trading expenses and taxes, and decreased Fund performance.
Other Strategic and Investment Measures
The Fund may also from time to time take temporary portfolio positions that may or may not be consistent with the Fund's principal investment strategies in attempting to respond to adverse market, economic, political, social or other conditions, including, without limitation, investing in exchange-traded futures contracts for various purposes, including among others, in seeking to reduce investment exposures, or in seeking to achieve indirect investment exposures, to a sector, country, region or currency where the Investment Manager believes such positioning is appropriate. The Fund may take such portfolio positions for as long a period as deemed necessary. While the Fund is so positioned, the Fund may not achieve its investment objective. Investing in this manner may adversely affect Fund performance. During these times, the portfolio managers may make frequent portfolio holding changes, which could result in increased trading expenses and taxes, and decreased Fund performance.
20% Asset Policy
In addition to any instruments mentioned in the Fund's principal investment strategies, the Fund may invest up to 20% of its net assets in derivatives, including forward contracts (including forward foreign currency contracts), futures (including equity futures and index futures), options (including options on futures) and swaps (including portfolio and total return swaps), as well as cash, cash equivalents and money market instruments, such as repurchase agreements and money market funds (including affiliated money market funds).
Investment Guidelines
As a general matter, and except as specifically described in the discussion of the Fund's principal investment strategies in this prospectus or as otherwise required by the Investment Company Act of 1940, as amended (the 1940 Act), the rules and regulations thereunder and any applicable exemptive relief, whenever an investment policy or limitation states a percentage of the Fund's assets that may be invested in any security or other asset or sets forth a policy regarding an investment standard, compliance with that percentage limitation or standard will be determined solely at the time of the Fund's investment in the security or asset.
Holding Other Kinds of Investments
The Fund may hold other investments that are not part of its principal investment strategies. These investments and their risks are described below and/or in the SAI. The Fund may choose not to invest in certain securities described in this prospectus and in the SAI, although it has the ability to do so. Information on the Fund's holdings can be found in the Fund's shareholder reports or by visiting columbiathreadneedleus.com/etfs.
Transactions in Derivatives
The Fund may enter into derivative transactions. Derivatives are financial contracts whose values are, for example, based on (or "derived" from) traditional securities (such as a stock or bond), assets (such as a commodity like gold or a foreign currency), reference rates (such as the Secured Overnight Financing Rate (commonly known as SOFR)) or market indices (such as the Standard & Poor's 500®Index). The use of derivatives is a highly specialized activity which involves investment techniques and risks different from those associated with ordinary portfolio securities