PetroChina was the first company to exceed a $1 trillion market capitalization on an opening day of trading in 2007.
PetroChina’s Shanghai listing debuted on November 5, 2007, and its shares surged dramatically on the first day. At its peak during that session, the company’s implied market capitalization exceeded $1 trillion, making it briefly one of the world’s most valuable companies.
PetroChina is the listed arm of China National Petroleum Corporation and operates across oil and natural gas exploration, production, refining, transportation, and sales. Its listing attracted enormous attention from Chinese investors during a period of strong enthusiasm for domestic equities.
The milestone was temporary because the share price later fell substantially. This is an important distinction: an intraday market-cap record can differ from a closing valuation or a longer-lasting ranking.