Star Equity Holdings Inc. is a diversified holding company operating through key business segments including Building Solutions, Energy Services, Business Services, and Investments. The Building Solutions division manufactures modular housing units, structural wall panels, permanent wood foundation systems, glue-laminated timber products, and supplies building materials such as lumber, windows, doors, cabinets, drywall, roofing, and decking to professional builders, general contractors, and retail customers for residential and commercial projects. The Energy Services division provides rental, sale, and repair of downhole tools for the oil and gas, geothermal, mining, and water-well industries. The Business Services division focuses on professional services operations. The Investments division holds and manages corporate-owned real estate assets along with investment positions in private and public companies. Founded in 1985 and headquartered in Old Greenwich, Connecticut, Star Equity Holdings Inc. plays a role in supporting construction, energy, and investment activities across various U.S. markets.