MFS Variable Insurance Trust

04/30/2026 | Press release | Distributed by Public on 04/30/2026 06:50

Prospectus by Investment Company (Form 497)

SUPPLEMENT TO THE PROSPECTUS

Supplement dated April 30, 2026, to the Prospectus dated April 30, 2026.

MFS® Mid Cap Growth Series

Effective July 1, 2026, the following is added to the table in the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Summary of Key Information":

Portfolio Manager

Since

Title

Bradford Mak

July 2026

Investment Officer of MFS

Effective immediately, the following is added after the tables in the sub-sections entitled "Portfolio Manager(s)" under the main headings entitled "Summary of Key Information" and "Management of the Fund":

Eric Fischman has announced his intention to retire effective April 30, 2027, and he will no longer be a portfolio manager of the fund as of that date.

Effective July 1, 2026, the following is added to the table in the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Management of the Fund":

Portfolio Manager

Primary Role

Five Year History

Bradford Mak

Portfolio Manager

Employed in the investment area of MFS since 2010

VMG-SUP-I-043026

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