Swiss Prime Site AG is a real estate investment company, which acquires, sells, manages, and develops properties. It operates through the following segments: Real Estate, Retail and Gastronomy, and Assisted Living. The Real Estate segment consists of real estate investment business and services provided by Wincasa AG. The Retail segment manages the Jelmoli-House of Brands department store. The Assisted Living segment comprises the senior residences and geriatric care facilities provided by Tertianum Group. The company was founded on May 11, 1999 and is headquartered in Olten, Switzerland.