Great Elm Group, Inc. engages in the durable medical equipment and investment management businesses. The company distributes respiratory care equipment, including positive air pressure equipment and supplies, ventilators and oxygen equipment, and replacement parts, as well as provides sleep study services; and rents medical equipment. It also offers investment management services. The company was formerly known as Great Elm Capital Group, Inc. and changed its name to Great Elm Group, Inc. in December 2020. Great Elm Group, Inc. was incorporated in 1994 and is headquartered in Waltham, Massachusetts.