Supplement dated September 17, 2020

to the Prospectus and Summary Prospectus of the following fund:

Fund	Prospectus and Summary Prospectus Dated
Columbia Funds Series Trust
Columbia Large Cap Growth Opportunity Fund (the Fund)	7/1/2020

Effective October 1, 2020, the portfolio manager information under the caption “Fund Management” in the Summary Prospectus and in the "Summary of the Fund" section of the Prospectus is hereby superseded and replaced with the following:

Portfolio Manager	Title	Role with Fund	Managed Fund Since
Tchintcia Barros, CFA	Senior Portfolio Manager	Co-Portfolio Manager	2015
Nicolas Janvier, CFA	Portfolio Manager	Co-Portfolio Manager	October 2020

The rest of the section remains the same.

Effective October 1, 2020, the portfolio manager information under the caption “Primary Service Providers - Portfolio Managers” in the "More Information About the Fund" section of the Prospectus is hereby superseded and replaced with the following:

Portfolio Manager	Title	Role with Fund	Managed Fund Since
Tchintcia Barros, CFA	Senior Portfolio Manager	Co-Portfolio Manager	2015
Nicolas Janvier, CFA	Portfolio Manager	Co-Portfolio Manager	October 2020

Ms. Barros joined one of the Columbia Management legacy firms or acquired business lines in 2005. Ms. Barros began her investment career in 2000 and earned a B.A. in economics from Dartmouth College and an M.B.A. from Harvard Business School.

Mr. Janvier joined Threadneedle, a Participating Affiliate, in 2014 as a portfolio manager. Prior to joining Threadneedle, Mr. Janvier worked as an investment professional for the Investment Manager or its predecessors from 2006 to 2014. Mr. Janvier began his investment career in 2000 and earned a B.A. from the University of Florida.

The rest of the section remains the same.

Shareholders should retain this Supplement for future reference.

SUP186_02_006_(09/20)