Apple was the first company to reach a $1 trillion market capitalization during intraday trading in 2018.
Apple crossed the landmark on August 2, 2018, as its share price rose following a strong earnings report. The company had already become a symbol of the trillion-dollar era because of the global scale of its iPhone ecosystem and its expanding services operations.
Intraday means during the trading session, rather than necessarily at the market's closing bell. This distinction matters because a share price can cross a threshold temporarily and finish the day below it.
Market capitalization is calculated from share price multiplied by shares outstanding. It therefore differs from enterprise value, which also considers debt and cash, and from revenue, which measures sales over a period. Financial headlines sometimes use these terms loosely, but they are not interchangeable.