Supplement dated August 11, 2022
to the Prospectus, Initial Summary Prospectus, and Updating Summary Prospectus
dated May 1, 2022 for

C.M. Life Electrum Select^SM

Issued by C.M. Life Insurance Company

and to the Prospectus and Updating Summary Prospectus
dated May 1, 2022 for

MassMutual Electrum^SM

Issued by Massachusetts Mutual Life Insurance Company

This supplement amends certain information in the above-referenced prospectuses:

Effective September 1, 2022, T. Rowe Price International Ltd will be added as an investment sub-adviser to the T. Rowe Price Limited-Term Bond Portfolio.

If you have questions about this supplement or your product, you may contact your registered representative, visit us online at www.massmutual.com/contact-us, or call our Administrative Office at (800) 665-2654. The Administrative Office is open Monday through Friday between 8 a.m. and 8 p.m. Eastern Time.

For more information about the fund, read the fund prospectus. Prospectuses are available on our website at www.massmutual.com.