Winmark Investment Holdings Limited, an investment holding company, provides interior fit-out solutions for property development and refurbishment projects in Singapore. It operates through two segments, Interior Fit-Out Business, and Wholesale and Retail Furnishings Business. The company customizes, manufactures, constructs, and installs various fit-out products, such as kitchen cabinets, wardrobes, vanity cabinets, doors, and doorframes for residential, hospitality, retail, and commercial sectors. It also constructs and installs interior fit-out works for interior spaces on a turnkey basis, which includes supply and installation of stone, aluminum, and sanitary ware products, as well as other furnishings, ceilings, floors, partitions, and mechanical and electrical works. In addition, the company designs, manufactures, and supplies a range of furnishings for home, office, and commercial use to various wholesale and retail customers. Further, it is involved in the nonbuilding construction business; and supply and installation of aluminum glazing works. The company was formerly known as Serrano Limited and changed its name to Winmark Investment Holdings Limited in June 2020. Winmark Investment Holdings Limited was incorporated in 2012 and is based in Singapore.