HIAG Immobilien Holding AG, together with its subsidiaries, provides site and project development services in Switzerland. The company operates three segments: Yielding portfolio, Development portfolio, and Transaction. It engages in the management and maintenance of properties; site and project development, including interim use, implementation, and transaction management to the real estate portfolio; and implementation of the capital recycling strategy. The company also offers metal recycling services. The company was founded in 1876 and is headquartered in Basel, Switzerland.