Apple’s stock-market value first exceeded $1 trillion in 2018, making it the largest U.S. company at that time.
Apple crossed the threshold on August 2, 2018, after reporting strong quarterly results and benefiting from continued investor confidence in the iPhone and its wider ecosystem. The milestone made Apple the first U.S.-listed company to reach that valuation.
Apple’s path to the milestone began with its founding in 1976 and accelerated after the company introduced the Macintosh, iPod, iPhone, and iPad. The iPhone, launched in 2007, became the central driver of Apple’s revenue and global brand.
The phrase “largest company” in this context means largest by market capitalization, not largest by employee count, annual revenue, physical size, or historical importance. Market-cap rankings change as share prices rise and fall.