Apple and Nvidia trade places as world's two largest companies

By Splitfeed EditorialLast updated Sep 27, 2026, 21:10 UTC

By late September 2026, Apple and Nvidia had settled into the top two positions in global market capitalization, with Nvidia having briefly held the number one spot before Apple reclaimed it. According to shattered.io on September 26, that tenure at the top lasted roughly two months rather than the year some had anticipated. The Motley Fool and affiliated outlets framed the two companies as a direct investment choice given their shared standing, while Bank of America described both stocks as buying opportunities around the same date. On the decentralized finance side, TradingView and CryptoRank reported on September 26 that tokenized versions of both Apple and Nvidia shares had become eligible as collateral for USDC loans on the Aave platform.

The broader significance lies in what the combined weight of these two companies represents for the wider market. Juan C., posting as @c4cus.bsky.social, noted that Nvidia and Apple together account for roughly 15 percent of the S&P 500 by market capitalization, with Nvidia at approximately 8 percent and Apple at 7 percent, a concentration that he said surpasses peaks seen during the dot-com era. That level of index concentration is a genuine point of debate among investors and economists, since a sharp move in either stock can now swing broad retirement and index funds in ways that were historically unusual.

The Pro-AI camp has not yet weighed in on this specific story. Typically, that camp would point to Nvidia's rise as validation that AI infrastructure investment is producing real, measurable economic value. Critics of AI read the same numbers differently. Birdpoof, at @birdpoof.bsky.social, argued that the companies driving AI's ascent are responsible for massive climate pollution, and julieorb, at @julieorb.bsky.social, framed the dynamic as workers effectively training systems that will displace them. The middle ground, as represented by Juan C.'s observation, is less focused on whether AI is good or bad and more concerned with structural market risk, specifically whether index concentration at these levels creates fragility that would affect ordinary investors regardless of their views on the technology.

The figure to watch is whether Nvidia holds or extends its share of the S&P 500 weighting through the remainder of 2026, and whether regulators or index providers revisit concentration caps in response.