It was founded as a state-owned company in 1984, and is now listed on the Stock Exchange of Thailand, doing business in oil refining and retail, as well as sustainable energy through various subsidiaries.

In the 1990s, under his leadership, the company made several initiatives focused on community responsibility as well as environmental awareness, which helped Sophon win the Ramon Magsaysay Award in 1998.

The company suffered heavily from the 1997 Asian financial crisis, and in 2001, the Finance Ministry reduced its shareholding percentage in Bangchak Petroleum.

In 2017, the company rebranded and changed its name to “Bangchak Corporation” to reflect it business operations, which had grown beyond petroleum refining and finished products retail.

In 2023, Bangchak signed the construction agreement of a sustainable aviation fuel production unit in its oil refinery in Bangkok.