SUPPLEMENT TO THE PROSPECTUS

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

MFS® Lifetime® 2050 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

Joseph Flaherty, Jr.

2010

Chief Investment Risk Officer of MFS

Benjamin Nastou

August 2023

Investment Officer and Co-Director-Quantitative Solutions of MFS

Natalie Shapiro

2018

Investment Officer of MFS

Erich Shigley

August 2023

Investment Officer of MFS

Joseph Flaherty, Jr., has announced his intention to retire effective June 1, 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

Joseph Flaherty, Jr.

Portfolio Manager,

General Oversight of a Team of Investment Professionals

Employed in the investment area of MFS since 1993

Benjamin Nastou

Portfolio Manager,

General Oversight of a Team of Investment Professionals

Employed in the investment area of MFS since 2001

Natalie Shapiro

Portfolio Manager,

General Oversight of a Team of Investment Professionals

Employed in the investment area of MFS since 1997

Erich Shigley

Portfolio Manager,

General Oversight of a Team of Investment Professionals

Employed in the investment area of MFS since 2013

Joseph Flaherty, Jr., has announced his intention to retire effective June 1, 2025, and he will no longer be a portfolio manager of the fund as of that date.

1052777      1      ML5-SUP-I-050924