Supplement dated June
30, 2026
to the Prospectus and Summary Prospectus of the following fund (the
Fund):
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Prospectus and Summary Prospectus Dated |
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Effective immediately, the following changes are hereby made to the Fund's Prospectus and Summary Prospectus.
The portfolio manager information under the caption “Fund
Management” in the Summary Prospectus and in the “Summary of Columbia Acorn® Fund” section of the Prospectus is hereby
superseded and replaced with the following:
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Head of North America Equities |
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The portfolio manager information for Columbia
Acorn® Fund under the “Primary
Service Provider Contracts” caption in the “More Information About the Funds” section of the Prospectus is hereby revised with the
following:
Information about the portfolio managers primarily responsible for overseeing the
Fund’s investments is shown below. The SAI provides additional information about the portfolio managers, including information relating to compensation, other accounts managed by the portfolio managers, and ownership by the portfolio managers of Fund
shares.
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Head of North America Equities |
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Mr. Janvier joined Threadneedle Asset Management Limited, a Participating Affiliate, in 2014 as a portfolio
manager. Mr. Janvier began his investment career in 2000 and earned a B.A. from the University of Florida.
Ms. Rath
has been associated with the Investment Manager or one of its affiliates since 2017. Ms. Rath began her
investment career in 2007 and earned a B.A. from Delhi University, India and an M.S. from the Illinois Institute of Technology, Chicago.
The rest of the Prospectus and Summary Prospectus remain unchanged.
Shareholders should retain this Supplement for future reference.