Largest Company end of May?

Platform comparison

Active sub-markets

Market context

At the end of May, the market will be resolved on which listed company has the highest market capitalisation at the close. NVIDIA enters the settlement window as the clear leader, and the 98% crowd-implied probability reflects how difficult it is for rivals to close a gap this late in the month. The comparable reference point is the same company’s recent hold on the top spot: in mid-May, reporting on the largest public companies placed NVIDIA around $5.2tn to $5.3tn, well ahead of Alphabet, Apple and Microsoft, which all sat hundreds of billions lower.

For traders, the key variables are a sharp move in NVIDIA’s own share price, a broad tech rotation, and any earnings or guidance surprises from the main challengers before the month ends. CNBC-style market reporting in May has pointed to continued strength in data-centre demand and heavy index flows into mega-cap tech, both of which support NVIDIA’s position. Alphabet’s ad and cloud results matter because it is the nearest contender in market-cap terms, while any drawdown from rising rates or a risk-off session would likely have to hit NVIDIA disproportionately to change the outcome. The settlement source relies on consensus reporting, so late-session closes and credible coverage of end-of-month valuations are the decisive inputs.

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Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.