2nd largest company end of May?

Platform comparison

Active sub-markets

Market context

The market is asking which company will sit second in the world by market capitalisation at the end of May, with the result taken from market close on 31 May. On Polymarket, the book is currently showing 0% YES, which is consistent with a market that has already converged hard rather than a live coin flip. That differs from Kalshi and Betfair-style pricing, where contracts or odds are often easier to compare against one another in decimal terms, while Polymarket and Smarkets more directly surface implied probability and can be quicker to reprice after earnings or a large index move. KYC access also matters: Polymarket’s reach is narrower than regulated exchange books, so liquidity and participant mix can diverge even when the underlying view is the same.

Comparable cases show how quickly this ranking can move when the gap between the top two names is small. Apple, Microsoft and Nvidia have each spent periods very close to the top of the table, and the second-place spot has often turned on a single session in one mega-cap’s shares rather than a broad market trend. A useful reference is late-April 2026, when the “2nd largest company end of April?” market resolved with Apple in second place; by contrast, the current market is much less about a close contest than about whether any late-month move can dislodge the incumbent. In these books, a 0% reading usually reflects a settled view, not mathematical impossibility.

The main catalysts are earnings, guidance and any sharp move in the relevant megacaps, especially around Nvidia, Microsoft and Apple, whose market values can swing by hundreds of billions on a single report or AI-related update. The last widely reported catalyst was Nvidia’s quarterly revenue forecast, which beat expectations and supported further growth, while Samsung’s recent union deal also showed how sector-specific headlines can lift chip valuations. Traders on Polymarket will see the market move in probabilities, whereas Kalshi and some Betfair or Smarkets listings may be easier to read through price changes or back/lay spreads; fee treatment and user access are also not identical, so the same headline can produce different visible reactions across platforms.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares 2nd largest company end of May? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 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.