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1B to 1.25B 34.5%
Next is 1.5B+ at 34%. Only Polymarket lists this market, so there is no second price to compare.
Consensus blends each venue’s last price, weighted by how much has traded there. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.
Prices come from our regular polls of each venue, the oldest 26 min ago. Ages are as of when this page was built.








The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.
Each venue’s resting orders for the selected outcome’s Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.
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Enter a stake to see where it buys the most after fees, using each venue’s live order book.
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Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.05 × price × (1 − price) per share (other / general rate). Fee calculator. Estimates only, not advice.
Live prediction market odds for "How many Anthropic shares will trade on IPO day?". 1B to 1.25B leads at 34.5%. Next is 1.5B+ at 34%. $1K has traded across 8 outcomes on Polymarket. The market is expected to resolve by Jan 1, 2028.
This market will resolve according to the total consolidated share volume of Anthropic's Class A common stock on Anthropic's first day of trading, as published by its primary exchange. Consolidated share volume means the total number of shares traded across all U.S. trading venues that report to the consolidated tape, including all U.S. stock exchanges and off-exchange trades reported to a FINRA trade reporting facility (such as alternative trading systems and broker-dealers). The figure used will be the daily share volume for Anthropic's first day of trading as displayed on the primary exchange's official historical data page for the stock, as displayed at 5:00 PM ET on the trading day following the first day of trading. Revisions published after that time will not be considered. If the primary exchange does not display this figure, another reliable source reporting consolidated share volume will be used. Each bracket includes its lower end and excludes its upper end, so a volume exactly on a boundary resolves to the higher bracket (e.g., exactly 1,000,000,000 shares resolves to "1B to 1.25B"). "M" means million shares and "B" means billion shares. Anthropic’s first day of trading refers to the first day Anthropic’s Class A common stock trades on the secondary market on its primary exchange. The sale of shares to investors at the IPO price, and any trading before the exchange listing (such as on private-share platforms), will not be considered. For this market, an IPO means an underwritten, SEC-registered offering of newly issued shares of Anthropic’s Class A common stock sold to the public for cash under a registration statement on Form S-1 that the SEC has declared effective, where the shares have been approved for listing on the New York Stock Exchange, NYSE American, the Nasdaq Stock Market, or Cboe BZX Exchange, and the offering has been priced, as shown by the first final prospectus filed with the SEC under Rule 424(b). Direct listings, mergers with a special purpose acquisition company (SPAC), reverse mergers, private placements, and listings outside the U.S. will not count. An IPO counts as completed by December 31, 2027, 11:59 PM ET if the pricing date stated on the cover of that first final prospectus is on or before that time, even if the prospectus is filed afterwards; if Anthropic’s registration statement has been declared effective by then but the prospectus has not yet been filed, this market will wait until 11:59 PM ET on the second business day after December 31, 2027 for it. Because this market depends on trading in Anthropic’s shares, if the IPO is priced but the shares never begin trading on the listing exchange, this market will resolve to “No IPO by December 31, 2027”. If Anthropic does not complete an IPO by then, or publicly announces a definitive agreement to be acquired by or merged into another company before completing one, this market will resolve to “No IPO by December 31, 2027”, regardless of whether that transaction is later completed or terminated. An IPO by a holding company formed to hold all or substantially all of Anthropic’s business for the purpose of the IPO counts as Anthropic’s IPO. If Anthropic's first day of trading is a shortened session (e.g., a half-day) or trading is interrupted (e.g., by a circuit breaker), the published daily share volume for that day will be used as displayed.
It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.
A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.
Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.
Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.
Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.