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