MassMutual was founded in 1851 and is headquartered in Springfield, Massachusetts. MassMutual is a mutually-owned company meaning the company is owned by its policy holders. MassMutual is ranked on the Fortune 500 list and ranked among the world’s “Most Admired Companies" in the life and health insurance industry category by Fortune magazine. MassMutual is committed to the career agency system and works with the local offices to provide training, support and career development.