Mah Sing Group Bhd. operates as an investment holding company. The firm engages in the development of residential and commercial properties and provision of management services. It operates through the following segments: Properties, Plastics and Investment Holding and Others. The Properties segment invests and develops residential, commercial and industrial properties. The Plastics segment manufactures, assembles and sells plastic moulded products. The Investment Holding and Others segment focuses on investment holding operations, provision of management and property support services and trading of building materials. The company was founded by Hoy Kum Leong in 1965 and is headquartered in Kuala Lumpur, Malaysia.