Largest IPO by market cap in 2026?

Platform comparison

Market context

SpaceX has already gone public, raising $75 billion at a $1.77 trillion valuation on its first trading day, instantly becoming the largest IPO in history and dwarfing all previous records[3][7]. This settlement is not a forecast but a confirmed outcome, as the company’s confidential SEC filing in April 2026 targeted a June roadshow and $1.75 trillion valuation, which materialised exactly as planned[2][5]. The market’s 86% confidence in SpaceX as the frontrunner for the largest 2026 IPO is therefore well-supported by executed reality, not speculation[1].

Historically, no IPO has approached SpaceX’s scale: Saudi Aramco’s 2019 record of $25.6 billion raised and Alibaba’s 2014 $21.8 billion are less than one-third of SpaceX’s proceeds[3]. Even OpenAI’s reported $840 billion valuation and Anthropic’s $330 billion target, both eyeing 2026 listings, fall far short of SpaceX’s $1.77 trillion closing cap[4]. The only credible contrarian view is that SpaceX’s valuation dwarfs all competitors, making the “No SpaceX” scenario the sole contrarian play worth monitoring, though it remains highly improbable[2].

Traders should watch for any post-listing adjustments to SpaceX’s share price or secondary market activity, as these could affect final market cap calculations, though the first-day close is already set[5]. No further announcements are needed, as the IPO is complete; the only dependency is the official Nasdaq closing price on the first trading day, which has been confirmed at $135 per share[7]. With the settlement window ending 31 December 2026, and the event already resolved, the market’s focus is now purely on confirming the final valuation figure for record-keeping purposes.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Largest IPO by market cap in 2026?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

Can I bet on individual matches?

Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.