Sansiri Public Company Limited, together with its subsidiaries, engages in the property development business in Thailand. It operates through Property Development; Building Management, Project Management and Real Estate Brokerage; Hotel Management; and Other Business segments. The Property Development segment develops land and housing projects, and residential condominium projects; and rents serviced apartments and office buildings. The Building Management, Project Management and Real Estate Brokerage segment provides building management, property project management, and real estate brokerage services. The Hotel Management segment manages hotels. The Other Business segment is involved in the hotel and education businesses. The company also offers events management, restaurant club management, and administrative services; and distributes standard branded products. In addition, it engages in E-commerce and retail businesses. The company was founded in 1984 and is headquartered in Bangkok, Thailand.