Shares of the leading designer of high-end AI chips were up 2.2% at $160.6 in morning trading, giving the company a higher market capitalization than Apple's record closing value of $3.915 trillion on December 26, 2024. Nvidia's newest chips have made gains in training the largest artificial-intelligence models, fueling demand for products by the Santa Clara, California, tech company. Microsoft is currently the second-most valuable company on Wall Street, with a market capitalization of $3.7 trillion as its shares rose 1.4% on $498.