Star Equity Holdings, Inc. is a diversified holding company. The Company operates through two divisions: Building Solutions and Investments. The Building Solutions division operates in three businesses, namely modular building manufacturing; structural wall panel, and wood foundation manufacturing, including building supply distribution operations; and glue-laminated timber (glulam) column, beam, and truss manufacturing. The Investments division manages and finances the Company' s real estate assets as well as its investment positions in private and public companies. It holds three real estate assets in its portfolio, two of which it lease to KBS Builders, Inc., and the third of which it lease to Glenbrook Building Supply, Inc. These include their principal production facilities in South Paris, Maine and Big Lake, Minnesota, respectively. The Company also owns two additional facilities: glulam manufacturing facility in Colfax, Wisconsin and a manufacturing facility in Oxford, Maine.