Supplement dated May 24, 2018

to the Prospectus and Summary Prospectus, each as supplemented, of the following fund (the Fund):

Fund	Prospectus and Summary Prospectus Dated
Columbia Funds Series Trust I
Columbia Multi-Asset Income Fund	9/1/2017

Effective immediately, the list of portfolio managers in the subsection “Fund Management” in the Summary Prospectus and in the "Summary of the Fund — Fund Management" section of the Prospectus for the above mentioned Fund is hereby superseded and replaced with the following:

Portfolio Manager	Title	Role with Fund	Managed Fund Since
Anwiti Bahuguna, Ph.D.	Senior Portfolio Manager	Lead Portfolio Manager	2015
Dan Boncarosky, CFA	Portfolio Manager	Portfolio Manager	2015

The rest of the section remains the same.

Effective immediately, the information about the portfolio managers 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Service Providers - Portfolio Managers” in the “More Information About the Fund" section of the Prospectus is hereby superseded and replaced with the following: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
Anwiti Bahuguna, Ph.D.	Senior Portfolio Manager	Lead Portfolio Manager	2015
Dan Boncarosky, CFA	Portfolio Manager	Portfolio Manager	2015

Dr. Bahuguna joined one of the Columbia Management legacy firms or acquired business lines in 2002. Dr. Bahuguna began her investment career in 1998 and earned a B.S. from St. Stephen’s College, Delhi University and a Ph.D. in economics from Northeastern University.

Mr. Boncarosky joined one of the Columbia Management legacy firms or acquired business lines in 2008. Mr. Boncarosky began his investment career in 2008 and earned a B.S. from Leonard N. Stern School of Business at New York University.

The rest of the section remains the same.

Shareholders should retain this Supplement for future reference.

SUP261_04_004_(05/18)