PTT Public Company Limited (OTCMKTS: PCHUY) is Thailand’s state-owned integrated energy company, headquartered in Bangkok. Established in 1978 by the Petroleum Authority of Thailand, PTT has grown into one of Southeast Asia’s largest oil and gas enterprises. The company plays a central role in the country’s energy security and economic development, operating under the supervision of the Thai Ministry of Finance.
In its upstream segment, PTT is involved in the exploration and production of crude oil and natural gas across Thailand and neighboring regions. The firm maintains a network of joint ventures and concessions in countries such as Myanmar, Malaysia, Indonesia and Vietnam. On the midstream side, it manages an extensive pipeline and storage infrastructure for both crude oil and natural gas, supporting the domestic delivery of energy products.
Downstream operations at PTT encompass refining, petrochemical manufacturing and fuel marketing. The company owns and operates major refineries in Thailand and supplies a wide range of petroleum products—including gasoline, diesel, liquefied petroleum gas (LPG) and aviation fuel—through an extensive retail network. Its petrochemical arm produces chemicals and polymers for industries ranging from automotive to packaging.
Beyond traditional hydrocarbons, PTT has expanded into power generation, renewable energy and liquefied natural gas (LNG) trading. The company invests in solar, wind and biofuel projects, and it participates in regional electricity markets. With a focus on sustainable growth, PTT continues to explore new technologies in clean energy and carbon management while maintaining its core oil and gas business.
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