Which company was the first publicly traded firm to reach a US$1 trillion market capitalization in the United States?

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Apple was the first publicly traded firm in the United States to reach a US$1 trillion market capitalization.

Apple reached the milestone on August 2, 2018, as its shares climbed after the company reported quarterly results. Because market capitalization uses the current share price and the number of outstanding shares, the exact threshold depends on the share count used and whether the measurement is intraday or at the close.

Apple’s valuation was built around a worldwide consumer brand and an integrated product ecosystem. The iPhone supplied a major part of the company’s business, while services, Macs, iPads, wearables, and accessories broadened its revenue sources.

The phrase “US company” matters because Saudi Aramco reached a comparable valuation soon afterward and because global market-cap lists include firms from many countries. A company’s listing location, incorporation, headquarters, and ownership can describe different aspects of its identity.

Source: Wikipedia · fact-checked Oct. 2026

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