SUPPLEMENT TO THE PROSPECTUS

Supplement dated May 9, 2024, to the Prospectus dated June 28, 2023.

MFS® Diversified Income Fund

Effective immediately, the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Summary of Key Information" is restated in its entirety as follows:

Portfolio Manager(s)

   

Portfolio Manager

Since

Title

Robert Almeida

2018

Investment Officer of MFS

Neeraj Arora

2019

Investment Officer of MFS

David Cole

2006

Investment Officer of MFS

Rick Gable

2006

Investment Officer of MFS

Alexander Mackey

2021

Co-Chief Investment Officer-Global Fixed Income of MFS

John Mitchell

2023

Investment Officer of MFS

Jonathan Sage

2006

Investment Officer of MFS

Geoffrey Schechter

2006

Investment Officer of MFS

Michael Skatrud

2018

Investment Officer of MFS

Jake Stone

May 2023

Investment Officer of MFS

Geoffrey Schechter has announced his intention to retire effective September 30, 2025, and he will no longer be a portfolio manager of the fund as of that date.

Effective immediately, the sub-section entitled “Portfolio Manager(s)” under the main heading entitled “Management of the Fund” is restated in its entirety as follows:

Portfolio Manager(s)

Information regarding the portfolio manager(s) of the fund is set forth below. Further information regarding the portfolio manager(s), including other accounts managed, compensation, ownership of fund shares, and possible conflicts of interest, is available in the fund’s SAI.

   

Portfolio Manager

Primary Role

Five Year History

Robert Almeida

Lead Portfolio Manager

Employed in the investment area of MFS since 2007

Neeraj Arora

Emerging Markets Debt Instruments Portfolio Manager

Employed in the investment area of MFS since 2011

David Cole

Below Investment Grade Debt Instruments Portfolio Manager

Employed in the investment area of MFS since 2004

Rick Gable

Real Estate Related Investments Portfolio Manager

Employed in the investment area of MFS since 2011

Alexander Mackey

Investment Grade Credit Bonds Portfolio Manager

Employed in the investment area of MFS since 2001

John Mitchell

Investment Grade Debt Instruments Portfolio Manager

Employed in the investment area of MFS since 2003

Jonathan Sage

Equity Securities Portfolio Manager

Employed in the investment area of MFS since 2000

Geoffrey Schechter

U.S. Government Securities Portfolio Manager

Employed in the investment area of MFS since 1993

Michael Skatrud

Below Investment Grade Debt Instruments Portfolio Manager

Employed in the investment area of MFS since 2013

Jake Stone

U.S. Government Securities Portfolio Manager

Employed in the investment area of MFS since July 2018; Vice President, Wellington Management Company, LLP prior to July 2018

Geoffrey Schechter has announced his intention to retire effective September 30, 2025, and he will no longer be a portfolio manager of the fund as of that date.

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