Supplement dated November 13, 2017

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

Fund	Prospectus and Summary Prospectus
Columbia Funds Series Trust I
Columbia Strategic Income Fund	3/1/2017, Prospectus and 3/1/2017 (As amended 9/29/2017), Summary Prospectus

Effective immediately, the information under the heading “Fund Management” in the “Summary of the Fund” section of the Prospectus is hereby superseded and replaced with the following:

Investment Manager: Columbia Management Investment Advisers, LLC

Portfolio Manager	Title	Role with Fund	Managed Fund Since
Gene Tannuzzo, CFA	Senior Portfolio Manager	Co-Portfolio Manager	2010
Colin Lundgren, CFA	Managing Director and Global Head of Fixed Income	Co-Portfolio Manager	2010
Jason Callan	Senior Portfolio Manager and Head of Structured Assets	Co-Portfolio Manager	November 2017

The rest of the section remains the same.

Effective immediately, the information under the heading “Portfolio Managers” in the “More Information About the Fund - Primary Service Providers” section of the Prospectus is hereby superseded and replaced with the following:

Portfolio Managers

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.

Portfolio Manager	Title	Role with Fund	Managed Fund Since
Gene Tannuzzo, CFA	Senior Portfolio Manager	Co-Portfolio Manager	2010
Colin Lundgren, CFA	Managing Director and Global Head of Fixed Income	Co-Portfolio Manager	2010
Jason Callan	Senior Portfolio Manager and Head of Structured Assets	Co-Portfolio Manager	November 2017

Mr. Tannuzzo joined the Investment Manager in 2003. Mr. Tannuzzo began his investment career in 2003 and earned a B.S.B. and an M.B.A. from the University of Minnesota, Carlson School of Management.

Mr. Lundgren joined the Investment Manager in 1986. Mr. Lundgren began his investment career in 1989 and earned a B.A. from Lake Forest College.

Mr. Callan joined the Investment Manager in 2007. Mr. Callan began his investment career in 2004 and earned a B.S. from the University of Minnesota and an M.B.A. from the University of Minnesota Carlson School of Management.

The rest of the section remains the same.

Shareholders should retain this Supplement for future reference.

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