Which company became the first publicly traded firm to reach a $3 trillion market capitalization at the close of a trading day?

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Apple became the first publicly traded firm to close a trading day with a $3 trillion market capitalization.

Apple achieved the closing milestone on June 30, 2023, when its shares finished the session at a level that valued the company above $3 trillion. This followed the company’s earlier intraday crossing in January 2022. The distinction matters because a company can pass a valuation threshold temporarily without maintaining it through the market close.

Apple’s valuation was supported by the scale of its iPhone business, recurring services income, and a large installed base of customers using multiple Apple products. Investors often treat the company’s ecosystem as a major competitive advantage.

Microsoft later reached a $3 trillion valuation, while Nvidia’s rapid artificial-intelligence growth brought it close to the same territory. Apple’s record, however, was the first confirmed end-of-day close above that threshold.

Source: Wikipedia · fact-checked Oct. 2026

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