Anthropic IPO Closing Market Cap (Middle Brackets): how this market works

What you need to know

This market is asking two things at once: will Anthropic, the AI company behind Claude, go public on a stock exchange before the end of 2027, and if it does, how much will the whole company be worth on that first day of trading? A 'Yes' to any bracket means an IPO happened and the company's total value landed in that range. The biggest bracket, 1.8 trillion dollars and above, would place Anthropic among the most valuable companies ever to list on a public market. The market settles based on Anthropic's market cap at the official closing price on its very first day of trading. Market cap is simply: share price times total number of shares. If no IPO happens before December 31, 2027 at 11:59 PM ET, the 'No IPO' outcome wins. One edge case worth knowing: if trading is interrupted on day one by something like a circuit breaker, the market uses whatever official closing price exists that day, or waits for the next day one closes normally. No relevant news about Anthropic's IPO plans was provided. The one headline in the feed is unrelated. The kinds of developments that would actually matter here are: any official announcement from Anthropic about going public, a major new funding round that signals they are staying private longer, or broader changes in the IPO market that affect when large tech companies choose to list. Several genuinely separate uncertainties stack on top of each other here. First, nobody outside Anthropic knows if or when they plan to go public. Second, even if an IPO is planned, market conditions in 2026 or 2027 could delay it. Third, AI company valuations have moved dramatically in short periods, making any specific dollar bracket hard to pin down even if an IPO date were known. The market currently puts a 23% chance on no IPO at all, which means timing uncertainty alone is a large factor.

The odds right now

• 1.8T+-1.5 pts (1w)42%
• 1.5–1.8T+1.5 pts (1w)19%
• No IPO by December 31, 2027+12.4 pts (1w)18%
• 1.2–1.5T+0.5 pts (1w)18%
• 0.9–1.2T-4.2 pts (1w)5%
• 0.6–0.9T-0.7 pts (1w)2%
• <0.6T+0.1 pts (1w)2%

Price history

How this resolves

Resolves December 31, 2027

This market will resolve based on Anthropic's market capitalization at the closing price on its first day of trading. If no IPO occurs by December 31, 2027, 11:59 PM ET, the market will resolve to "No IPO by December 31, 2027". Read the full resolution rules on the live market page.

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