Supplement dated November 13, 2017

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

Fund	Prospectus Dated
Columbia Funds Series Trust I
Columbia Corporate Income Fund	9/1/2017

Effective immediately, the list of portfolio managers 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“Fund Management” in the Summary Prospectus and in the “Summary of the Fund" section of the Prospectus is hereby superseded and replaced with the following: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
Tom Murphy, CFA	Vice President, Senior Portfolio Manager and Head of Investment Grade Credit	Lead Portfolio Manager	2011
Timothy Doubek, CFA	Senior Portfolio Manager	Portfolio Manager	2011

The rest of the section remains the same.

Effective immediately, the information about the portfolio managers under the caption “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Managers” in the “More Information About the Fund — Primary Service Providers" section of the Prospectus is hereby superseded and replaced with the following: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 Manager	Title	Role with Fund	Managed Fund Since
Tom Murphy, CFA	Vice President, Senior Portfolio Manager and Head of Investment Grade Credit	Lead Portfolio Manager	2011
Timothy Doubek, CFA	Senior Portfolio Manager	Portfolio Manager	2011

Mr. Murphy joined the Investment Manager in 2002. Mr. Murphy began his investment career in 1986 and earned a B.B.A. from the University of Notre Dame and an M.B.A. from the University of Michigan.

Mr. Doubek joined the Investment Manager in 2001. Mr. Doubek began his investment career in 1987 and earned an M.B.A. from the University of Michigan.

The rest of the section remains the same.

Shareholders should retain this Supplement for future reference.

SUP136_04_001_(11/17)

Supplement dated November 13, 2017

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

Fund	Prospectus Dated
Columbia Funds Series Trust I
Multi-Manager Total Return Bond Strategies Fund	1/1/2017

Effective immediately, the list of portfolio managers for Columbia Management Investment Advisers, LLC, 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“Fund Management” in the Summary Prospectus and in the “Summary of the Fund" section of the Prospectus is hereby superseded and replaced with the following: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
Jason Callan	Senior Portfolio Manager and Head of Structured Assets	Co-Portfolio Manager	2016
Gene Tannuzzo, CFA	Senior Portfolio Manager	Co-Portfolio Manager	November 2017

The rest of the section, including the portfolio manager information for Loomis Sayles, Prudential and TCW, remains the same.

Effective immediately, the information about the portfolio managers for Columbia Management Investment Advisers, LLC, under the caption “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 Manager	Title	Role with Fund	Managed Fund Since
Jason Callan	Senior Portfolio Manager and Head of Structured Assets	Co-Portfolio Manager	2016
Gene Tannuzzo, CFA	Senior Portfolio Manager	Co-Portfolio Manager	November 2017

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.

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.

The rest of the section, including the portfolio manager information for Loomis Sayles, Prudential and TCW, remains the same.

Shareholders should retain this Supplement for future reference.

SUP101_08_004_(11/17)

Supplement dated November 13, 2017

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

Fund	Prospectus Dated
Columbia Funds Series Trust I
Columbia Total Return Bond Fund	9/1/2017

Effective immediately, the list of portfolio managers 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
Jason Callan	Senior Portfolio Manager and Head of Structured Assets	Lead Portfolio Manager	2016
Gene Tannuzzo, CFA	Senior Portfolio Manager	Portfolio Manager	November 2017

The rest of the section remains the same.

Effective immediately, the information about the portfolio managers under the caption “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 Manager	Title	Role with Fund	Managed Fund Since
Jason Callan	Senior Portfolio Manager and Head of Structured Assets	Lead Portfolio Manager	2016
Gene Tannuzzo, CFA	Senior Portfolio Manager	Portfolio Manager	November 2017

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.

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.

The rest of the section remains the same.

Shareholders should retain this Supplement for future reference.

SUP166_04_006_(11/17)

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 Bond Fund	9/1/2017

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
Jason Callan	Senior Portfolio Manager and Head of Structured Assets	Lead Portfolio Manager	2016
Gene Tannuzzo, CFA	Senior Portfolio Manager	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
Jason Callan	Senior Portfolio Manager and Head of Structured Assets	Lead Portfolio Manager	2016
Gene Tannuzzo, CFA	Senior Portfolio Manager	Portfolio Manager	November 2017

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.

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.

The rest of the section remains the same.

Shareholders should retain this Supplement for future reference.

SUP121_04_002_(11/17)