PetroChina became the first company to reach a $1 trillion market capitalization briefly in 2007.
PetroChina crossed the threshold shortly after listing shares in Shanghai, making it the first publicly traded company reported to reach a $1 trillion value. The achievement was short-lived: its share price soon declined, and the company fell back below the level.
The episode shows why market-cap rankings can be volatile, especially when a newly listed stock attracts intense buying. PetroChina is the listed arm of China National Petroleum Corporation, one of China’s major state-owned energy groups. Its business includes oil and gas exploration, production, refining, and distribution.
PetroChina is sometimes confused with Sinopec, another large Chinese energy company. They are separate corporations with different corporate structures and stock listings. The 2007 milestone also predates the later trillion-dollar achievements of technology giants such as Apple, Microsoft, and Nvidia.