OpenAI IPO by 2026?

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Market context

OpenAI would need to complete and close a public listing before 31 December 2026 for this market to resolve Yes, and it remains a private company with no filed prospectus or confirmed exchange date. That keeps the 0% crowd price anchored to the simplest fact in the story: there is still no public offer on the table, so the market is pricing a sequence of steps that has not yet begun.

For comparison, large technology listings usually move only once a company files, names lead banks and sets a timetable; until then, timing risk stays very high. CMC Markets said in January 2026 that the Wall Street Journal reported OpenAI was laying groundwork for a fourth-quarter 2026 listing, while other coverage has put the company’s latest private valuation at about $852bn after a March funding round, with earlier reports pointing to an $830bn raise target and even talk of a $1tn flotation. That scale suggests a landmark deal if it happens, but it does not change the need for a formal SEC registration, pricing and an actual first public sale of shares.

The key catalysts are a prospectus filing, any official confirmation of underwriters, and whether the company can clear the remaining pre-IPO financing and governance steps. Recent reports also point to possible frictions: Bloomberg coverage on 14 May said OpenAI’s relationship with Apple had become strained, which matters because partner stability and product distribution can shape listing readiness. If a filing slips into late 2026, the market still has time; if it has not appeared by autumn, the probability of a 2026 IPO falls sharply.

Sources: 1 · 2 · 3 · 4 · 5

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

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.

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.