Great Elm Group, Inc. operates in durable medical equipment, investment management, and real estate businesses. It 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. The company also offers investment management services. In addition, it engages in the real estate activities. 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 founded in 1994 and is headquartered in Waltham, Massachusetts.