Nvidia last became the most valuable company in January this year and has been competing with Apple and Microsoft for the top position since mid-2023.

Palantir Technologies has succeeded where most tech stocks have struggled this year: staying hot in a cooling market.

With a stock price of $141.22 per share, the computer-chip maker NVDA ended Tuesday's trading day with a $3.45 trillion valuation, according to Dow Jones Market Data, while Microsoft Corp.'s MSFT ...