OpenAI IPO by 2026?

Platform comparison

Market context

OpenAI has not announced a public listing date, but it has confidentially filed for an IPO and several reports now frame the timing as late 2026 at the earliest, with a growing possibility of delay into 2027. Reuters and other outlets have reported that the company is weighing postponement, while CNBC’s recent read on Kalshi pricing put only about a one-in-three chance on any announcement before 1 January 2027.[7][3][1]

That leaves the current 1% “Yes” price as a useful reminder that markets are not pricing a mere filing; they are pricing a completed offering inside the settlement window. Comparable mega-listing cases show why the odds stay low until the last steps are public: confidential S-1s, underwriter selection, exchange paperwork and a formal pricing range still leave room for delay or withdrawal. OpenAI’s private-market valuation has already climbed through repeated fundraisings, including reported levels around $852 billion, which supports the scale of interest but does not by itself force an IPO.[6][8][2]

For traders, the key catalysts are official company statements, any public S-1 or prospectus, named underwriters, and credible reporting on whether management is still targeting 2026 or slipping to 2027. Because this market settles on completion, not merely intention, the depth of the book will tend to track fresh cash in from users who can fund quickly and cheaply; on-ramp friction matters more here than in longer-dated equities themes. Lower-cost deposits and withdrawals, including card-to-bank rails such as SEPA and stablecoin transfers like USDC, can widen participation and support turnover, while fiat off-ramp delays can thin it out when the story turns on a single filing date.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares OpenAI IPO by 2026? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

FAQ

How does Klarna deposit work on Polymarket Klarna UK?

You enter the deposit amount in EUR/GBP, choose Klarna as the method, run through Klarna's standard authentication (Pay Later or Direct Bank Transfer), and Polymarket Klarna UK converts internally to USDC for the Polymarket order book. Processing: typically under 30 minutes.

Which payment methods are supported?

Klarna (Pay Now / Pay Later), SOFORT, SEPA bank transfer, credit card (Visa/Mastercard), Apple Pay, Google Pay, and direct USDC deposit on Polygon. Availability depends on your jurisdiction.

How fast is SEPA deposit?

SEPA Instant: under 10 seconds. SEPA Standard: 1-2 business days. Both accepted fee-free; the internal USDC conversion runs automatically once EUR lands in the platform account.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

Are payment details protected?

Yes. Card and bank details are never stored by Polymarket Klarna UK — they pass directly through PCI-DSS compliant payment service providers (Adyen, Stripe). Polymarket Klarna UK retains only transaction IDs and Klarna reference numbers for reconciliation.