ISP Holdings Limited, an investment holding company, engages in property and facility management, and interior and special project businesses in the People's Republic of China, Hong Kong, and Macau. It provides asset management services, such as feasibility study, due diligence, market positioning, design consultancy, marketing and promotion, financial analysis, leasing, tenancy management, and operation management services. The company also offers interior design, alteration and addition, fitting-out, conservation, renovation, demolition, and construction works; and curtain walling, cladding, and related products. In addition, it provides procurement, supply chain, and trading businesses; repair and maintenance services for equipment; indoor cleaning services; and property agency services, as well as property management consultancy services. The company was formerly known as Synergis Holdings Limited and changed its name to ISP Holdings Limited in January 2022. ISP Holdings Limited was founded in 1978 and is based in Kwun Tong, Hong Kong. ISP Holdings Limited is a subsidiary of Hsin Chong Group Holdings Limited.