Progen Holdings Ltd. is an investment holding company, which engages in the design, supply, installation, and maintenance of air-conditioning and mechanical ventilation systems. It operates through the following segments: Products and Installation, Servicing and Maintenance, Rental, Property Development, and Others. The Products and Installation segment refers to the contracting of engineering works, cooling towers, air-conditioning, and mechanical ventilation systems. The Servicing and Maintenance segment focuses on servicing and repairing air-conditioners, cooling towers, and other cooling equipment. The Rental segment refers to leasing factory and office space. The Property Development segment deals with the development and sale of residential properties undertaken by the associated company. The company was founded by Ee Lee in October 1981 and is headquartered in Singapore.