Nvidia hits $4 trillion market cap, cementing tech’s dominance in stock market

Nvidia Corp’s remarkable rise to a $4 trillion market valuation highlights its pivotal role in the stock market and the broader technology sector. The AI chipmaker’s shares have surged roughly 1,350% since October 2022, with a 22% gain so far in 2025, outperforming the 6% rise of the S&P 500.

The milestone was reached during morning trading on Wednesday, about 13 months after Nvidia first hit the $3 trillion mark. This rapid appreciation has made Nvidia the largest single stock by market value in the S&P 500, where it now accounts for around 7.5% of the index—more than any other company.

Nvidia’s influence is even more pronounced in tech-heavy indexes like the Invesco QQQ Trust ETF and the Philadelphia Semiconductor Index, though it has a smaller presence in price-weighted indexes such as the Dow Jones Industrial Average.

Microsoft ($3.7 trillion) and Apple ($3.1 trillion) trail Nvidia but are closing in on the $4 trillion threshold, underscoring the dominance of tech giants. The top seven companies in the S&P 500—also including Amazon, Alphabet, Meta Platforms, and Broadcom—make up about one-third of the index’s total market value.

This surge illustrates the growing dominance of the technology sector, which now represents about one-third of the S&P 500’s market value, nearing levels last seen during the dot-com bubble peak in 2000.

Other standout tech stocks in 2025 include Microsoft (+19%), Oracle (+40%), and Palantir (+88%).