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 of air-conditioners, cooling towers, and other cooling equipment. The Rental segment refers to leasing of factory and office space. The Property Development segment deals with developing and selling of residential properties undertaken by the associated company. The company was founded by Lee Ee in October 1981 and is headquartered in Singapore.