PTT Public Company Limited, together with its subsidiaries, engages in the upstream and downstream petroleum, natural gas, and other related businesses in Thailand, other Asian countries, Europe, the United States, and internationally. It operates through Upstream Petroleum and Natural Gas Business Group, Downstream Petroleum Business Group, and Technology and Engineering Group segments. The company engages in the exploration and production of petroleum; and natural gas procurement, pipeline transmission, distribution, and separation activities. In addition, it is involved in the exploration, production, and distribution of coal; marketing of petroleum products and lube oil through an operating system of procurement, storage, and distribution of products, as well as the retail business at service stations. Further, it imports and exports petroleum and petrochemical products, as well as other related products; and produces and distributes electricity, steam, and water for industrial purpose, as well as offers project management services. Additionally, the company provides human resource support, petroleum related technology, consultant management, technical consultant, petrol station and convenience store management, factory maintenance and engineering, oil and gas, safety and environmental, and business services, as well as services for the storage and handling of liquid chemicals. It also invests in liquefied natural gas business; produces and distributes chilled water/constructs and installs electricity generating systems; develops electricity power production projects; invests in other companies; develops, markets, and distributes polymers products, by products, and other polymers-related products; and manufactures and distributes biochemical products, as well as engages in transportation, warehouse, and bagging packing management of polyethylene. PTT Public Company Limited was founded in 1978 and is headquartered in Bangkok, Thailand.