Anthropic IPO Closing Market Cap (Middle Brackets)

Resolution Criteria

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". Market capitalization expresses the monetary value of a company’s outstanding shares, stated in its pricing currency. It is calculated as the number of shares outstanding multiplied by the closing share price on the first trading day. If the relevant value falls exactly between two brackets, then this market will resolve to the higher range bracket. Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used. In the event of an interruption in the course of the normal trading session on Anthropic’s first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that as the first day of trading for purposes of this market.

Prediction markets show trading on Anthropic's IPO closing market capitalisation heavily concentrated on the highest bracket, with the $1.8 trillion-and-above outcome drawing the most volume by a substantial margin. The next-heaviest clusters sit around the $1.5–1.8 trillion and $1.2–1.5 trillion ranges. Around one in ten contracts trades on no IPO occurring before the 31 December 2027 deadline.

Market structure

Seven outcomes cover market capitalisation brackets from below $600 billion through to $1.8 trillion-plus, plus a 'No IPO by December 31, 2027' fallback. Volume is heavily concentrated on the top bracket, with a secondary cluster across the $1.2–1.8 trillion range and a small tail on sub-$900 billion outcomes. Resolution is based on Anthropic's official first-day closing market capitalisation on its primary exchange, with a hard deadline of 31 December 2027.

Background

Anthropic, the AI safety company founded in 2021 by former OpenAI researchers including Dario and Daniela Amodei, has grown into one of the most heavily capitalised private technology companies in the world. Its Claude family of large language models competes directly with OpenAI's GPT series and Google's Gemini. The company has attracted multi-billion dollar investments from Amazon and Google, among others, pushing its private valuation into the hundreds of billions of dollars. An IPO has not been officially announced, but the company's scale, investor base, and the broader momentum in AI sector listings have kept the question of a public offering prominently discussed in financial and technology coverage. The deadline set by this market — end of 2027 — spans a period in which AI infrastructure investment and capital markets conditions will both play a significant role.

Key factors

Several structural factors could influence both whether an IPO occurs and what market capitalisation it commands. Private valuation at the time of listing sets a baseline, but IPO pricing reflects investor appetite, comparable company multiples, and broader equity market conditions at the moment of listing. The AI sector's revenue growth trajectory — particularly Anthropic's ability to convert model capability into enterprise and API revenue — will shape how institutional investors price the offering. Regulatory developments around large language models, data usage, and AI liability in the United States and European Union could alter risk perception. Amazon's deep integration as both investor and cloud infrastructure partner introduces questions about revenue concentration that underwriters would scrutinise. The competitive landscape — particularly OpenAI's own path to a for-profit structure and potential public offering — could affect timing decisions. A deterioration in technology sector valuations or a broader market downturn between now and end-2027 could delay or suppress a listing, increasing the probability of the 'No IPO' outcome resolving.

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