Lincoln National is a holding company. Through its subsidiaries, Co. operates several insurance and retirement businesses. Co. has four segments: Annuities, which provides tax-deferred investment growth and lifetime income opportunities for its clients by providing variable annuities, fixed (including indexed) annuities and indexed variable annuities; Retirement Plan Services, which provides employers with retirement plan products and services, primarily in the defined contribution retirement plan marketplace; Life Insurance, which focuses on the creation and protection of wealth for its clients; and Group Protection, which provides group non-medical insurance products and services.