Insurance Representative of MassMutual. Registered Representative of and offers securities, investment advisory and financial planning services through MML Investors Services LLC, a member of the MassMutual Financial Group. 101 Federal Street, Suite 800, Boston, MA 02110. (617) 439-4389. MassMutual Financial Group is a marketing name for Massachusetts Life Insurance Company (MassMutual) and its affiliated companies and sales representatives, Springfield, MA 01111-001. Local sales agencies are not subsidiaries of MassMutual or its affiliated companies.