Which company was the first publicly traded business to surpass a $1 trillion market cap in the energy sector?

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PetroChina was the first publicly traded energy company to surpass a $1 trillion market capitalization.

PetroChina reached the milestone shortly after its 2007 listing in Shanghai. Its shares surged on the first day of trading, briefly giving the company a valuation above $1 trillion and making it one of the world’s most valuable companies at that time.

PetroChina is the listed arm of China National Petroleum Corporation, a state-owned oil and gas group. The company operates across exploration, production, refining, transportation, and sales, which gives it broad exposure to the energy industry.

The milestone was short-lived because market prices can move rapidly. It is also distinct from Saudi Aramco’s later $2 trillion valuation and from the large market values reached by technology companies.

Source: Wikipedia · fact-checked Oct. 2026

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