Pronóstico: Largest IPO by market cap in 2026?

Platform comparison

Market context

The real-world event in question is the initial public offering of a company in 2026 that will achieve the highest market capitalisation on its first trading day, measured in U.S. dollars. This settlement hinges on the closing share price multiplied by outstanding shares on that debut date, with the window ending 31 December 2026.

Historically, no IPO has surpassed the $1.77 trillion valuation achieved by SpaceX in June 2026, which raised $75 billion and became the largest IPO in history [7][8]. Prior to this, the record stood at $6.27 billion for Medline in December 2025, while Klarna’s $1.37 billion IPO in September 2025 marked the largest European fintech listing since Adyen in 2018 [1]. The current market probability must be read against this unprecedented benchmark, as any contender would need to shatter SpaceX’s valuation to win.

Traders should monitor SEC filings and roadshow announcements for SpaceX, OpenAI, and Anthropic, all reportedly eyeing public listings in 2026 with valuations of $1.25 trillion, $840 billion, and $330 billion respectively [2]. SpaceX confidentially filed for an IPO in April 2026, targeting a June roadshow at $1.75 trillion, which would be the largest IPO ever if realised [3]. Fidelity notes that 2026 could be a record year, with OpenAI, SpaceX, and Anthropic among high-profile candidates yet to debut [4]. Watch for regulatory approvals, pricing details, and secondary market activity, as these will determine whether any firm can exceed SpaceX’s existing record.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Pronóstico: 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

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

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.

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.

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.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.