Apple first reached a $1 trillion market capitalization in the United States in August 2018.
Its share price rose above the threshold on August 2, 2018, making Apple the first U.S. publicly traded company to reach a $1 trillion valuation. The calculation used Apple’s share price and the number of shares outstanding after years of growth in its consumer technology business.
The iPhone was the main commercial engine behind Apple’s expansion, while the Mac, iPad, App Store, and other services broadened the company’s revenue base. Apple’s market value later continued upward, reaching $2 trillion in 2020 and $3 trillion in 2022.
The wording “in the United States” matters because PetroChina briefly exceeded $1 trillion at its 2007 Shanghai listing. That earlier event is often mentioned in discussions of global market-cap records, while Apple’s achievement is the standard reference for the first U.S. company to cross the mark.