- Business
- Siamgas and Petrochemicals Public Company Limited operates as a leading LPG distributor and petrochemical company based in Bangkok, Thailand. Founded in 1976, the company engages in a diversified range of energy-related businesses including LPG and petrochemical trading, LPG and petrochemical transportation, LPG cylinder and autogas tank manufacturing, oil retail, and container terminal services. The company operates principally in Thailand, where it is the second largest LPG trader, selling LPG under the brands "SIAMGAS" and "UNIQUEGAS," and extends its operations across East Asia including China, Singapore, Malaysia, Vietnam, Laos, and Myanmar with additional LPG brands like "SGGAS," "SINGGAS," and "MYGAZ."
Siamgas and Petrochemicals' core business segments include LPG distribution in cylinders for household, industrial, and automotive use; land transportation through a fleet of over 400 LPG and oil road tankers; marine transportation with over 20 LPG tanker vessels including three very large gas carriers (VLGCs); LPG cylinder manufacturing under the Siam Quality Steel (SQS) brand with an annual production capacity of 750,000 cylinders; and the operation of oil terminals and deep-sea ports, notably Siam Tank Terminal in Thailand. The company also invests in power generation, operating a 230 MW combined cycle power plant and a 10 MW diesel power plant in Myanmar.
Recent major changes include the commissioning of a new LPG terminal facility, Sukasawat Terminal, in Thailand in 2024; a strategic investment expansion into power plants in Myanmar; acquisition of a liquid tank farm and deep-sea port facility in Thailand; and the acquisition of LINH Gas Cylinder Co., Ltd., an LPG cylinder manufacturer in Thailand. In 2022, the company acquired Prasansack Gas Sole Co., Ltd., expanding its LPG trading business into Laos. The company continues to integrate vertically and expand its supply chain and distribution infrastructure to strengthen market presence. As of the third quarter of 2025, Siamgas has maintained significant market shares in its core Thailand LPG market and its overseas trading business while adapting to LPG price fluctuations and market demand shifts.
Siamgas and Petrochemicals trades primarily in LPG and petrochemical products and operates comprehensive logistics services covering land and marine transportation. It serves multiple customer sectors including household, automotive, and industrial clients across its geographic footprint in Southeast and East Asia. The company is headquartered in Bangkok with extensive terminal, depot, and filling plant networks throughout Thailand and beyond, supporting its broad product and service offerings. Siamgas and Petrochemicals is publicly listed on the Stock Exchange of Thailand under ticker SGP and is a major player in the regional energy supply chain with a robust infrastructure platform and diversified business model.