Nvidia becomes largest company with $5.2T market cap

Nvidia’s market cap has passed $5.2 trillion, making it the largest publicly traded company. The Polymarket contract for Nvidia being the largest company by April 30 is at 100% YES.

Market reaction

The April 30 market hit 100% YES, up from 99% yesterday, with just six days until resolution. The June 30 market trades at 92% YES, showing traders expect Nvidia to hold the top spot through the summer.

Why it matters

Nvidia’s dominance comes from its near-monopoly on GPUs used to train and run large AI models. The order book is thick: it would take $183,166 to move the price 5 percentage points, which points to strong institutional positioning and minimal volatility at these levels. Daily trading volume is $46,745 in USDC. Nvidia’s valuation now exceeds the GDP of most countries, and its position in the semiconductor supply chain sits at the center of U.S.-China trade friction.

At 92% YES for June 30, a YES share at 92¢ pays $1 if Nvidia remains on top, a 1.09x return. For this contract to flip, a competitor like Apple or Microsoft would need a dramatic surge while Nvidia simultaneously declined.

What to watch

Nvidia’s upcoming earnings reports, any announcements about its Blackwell chip architecture, and U.S.-China semiconductor export policy shifts. Any of these could move the June 30 contract.

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