Altareit SA engages in the promotion of real estate properties and investments in e-commerce. It operates through the following segments: Housing, Offices, Diversification, and E-Commerce. The Housing segment includes promotion activities of residential properties. The Offices segment engages in the development and promotion of commercial offices and buildings. The Diversification segment engages in the operation of hotels. It also constructs, operates, and manages facilities it leases to companies. The E-Commerce segment manages online selling business. The company was founded on June 16, 1955 and is headquartered in Paris, France.