Anthropic IPO by 2027?

Platform comparison

Market context

Anthropic would need to complete an IPO and have its shares begin trading on a public exchange by the listed deadline for this market to settle **Yes**; the company is still private today, and the clearest public signal so far is its confidential SEC filing in June 2026, which does not itself set a listing date.[2][9][10] Recent reporting has said bankers were lining up investor meetings and that the deal could come as soon as October 2026, but that remains unconfirmed and the timing can still slip.[3][6][14]

For context, this is a classic “filing versus listing” market: many high-profile private companies announce or confidentially file long before they actually price and list, so the gap between a draft prospectus and first trade is where most of the uncertainty sits.[2][9][10] Comparable late-stage IPO situations have shown that markets often move on hints from underwriter meetings, public S-1 timing, and exchange preparations rather than on the confidential filing alone.[3][5][8] With the crowd at 0% YES, Polymarket-style pricing is effectively saying a 2026-27 debut is not yet actionable, while platforms that quote decimal odds will still show the same low expectation in a different format; Kalshi and Betfair/Smarkets can also differ on fees, KYC access and whether you can trade the exact event contract at all, which matters if you are comparing liquidity rather than just direction.

The main catalysts are a public S-1 amendment, the roadshow window, and any official exchange or SEC notices that confirm pricing and listing timing.[4][9][10] Traders should also watch for fresh reporting from major outlets: CNBC said last month that Anthropic had confidentially filed and could debut as early as October, but without a formal announcement the market remains dependent on company and SEC disclosures.[3] If Anthropic were to be acquired by a public company before listing, the contract would resolve **No** under the market rules.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Anthropic IPO by 2027? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.