BTS Group Holdings PCL (BTSG) is primarily a mass-transit services provider in Thailand and a privately-owned conglomerate. Listed on the Stock Exchange of Thailand (SET), BTSG is a constituent member of the SET50 “Bluechip” Index and MSCI Asia Pacific Index and among the largest companies in Thailand. The company is also engaged in complementary businesses in Media, Property and Services.

The company's subsidiary, Bangkok Mass Transit System Public Co., Ltd. (BTSC) is the exclusive concessionaire and operator of the BTS SkyTrain Core Network, the Bus Rapid Transit system, the exclusive operator of certain extensions to the Core Network and future operator and majority joint venture partner of the Pink and Yellow monorail lines in Bangkok, Thailand. The SkyTrain constitutes elevated trackwork covering 23.5 kilometers with 23 stations in Bangkok, while the bus rapid transit system has 12 stations and 15 kilometers of dedicated bus lane.