When Will Anthropic Announce Its IPO? Market Jumps on $2 Trillion Valuation Report

One of the biggest potential IPOs in history may be getting closer.

Prediction market prices jumped after Reuters reported new details Monday from Anthropic's IPO prospectus, including a potential valuation exceeding $2 trillion. Traders now see a strong chance that an official announcement arrives before the end of 2026.

Market Snapshot

• Before Nov. 1: 25%
• Before Dec. 1: 68%
• Before Jan. 1, 2027: 81%
• Before Feb. 1, 2027: 83%
• Market volume: $2.72M+
• Resolution: Official Anthropic IPO announcement
• Prediction market prices on Kalshi as of 5:53 a.m. EDT Tuesday, Sept. 29, 2026.

Quick Brief

The market for an Anthropic IPO announcement moved sharply following the latest round of reporting.

Traders give Anthropic a 25% chance of making an official announcement before Nov. 1, up 20 points. The probability jumps to 68% before Dec. 1 and 81% before Jan. 1, increases of 15 and 11 points, respectively.

The moves followed Reuters' report Monday on a prospectus that offered the clearest look yet at Anthropic's potential public-market debut. The company could seek a valuation above $2 trillion, while its financial disclosures underscore both its rapid growth and the enormous cost of competing at the frontier of artificial intelligence.

There is an important distinction in the prediction market: traders are pricing when Anthropic will officially announce its IPO, not when the stock will begin trading.

How Anthropic got here

Anthropic's path toward the public markets has accelerated rapidly, with major fundraising, AI-safety warnings, political tensions, and IPO preparations converging over the past several months.

• May 28 - Anthropic approaches $1 trillion: The company raised $65 billion in a Series H round at a $965 billion post-money valuation. Anthropic said its run-rate revenue had crossed $47 billion earlier that month.
• June 1 - Confidential IPO filing: Anthropic announced that it had confidentially filed for a US IPO, formally starting the process without establishing when the offering would be publicly announced or completed.
• Sept. 12 - Amodei calls for an AI slowdown: CEO Dario Amodei argued that frontier AI development should slow as safety measures catch up with increasingly powerful systems.
• Sept. 23 - AI safety reaches the U.N.: Amodei and OpenAI CEO Sam Altman separately addressed the U.N. Security Council about AI safety and the risks posed by increasingly capable systems.
• Sept. 27 - Amodei meets Trump: President Donald Trump and Amodei held their first one-on-one meeting over a private White House dinner following months of tension between Anthropic and the administration. Details of their discussion were not publicly disclosed.
• Sept. 28 - Prospectus details emerge: Reuters reported that Anthropic's prospectus points toward a potential valuation above $2 trillion while revealing new details about the company's finances, spending commitments, and AI-risk disclosures.

From $965 billion to potentially $2 trillion

The potential valuation may be the most striking number surrounding the IPO.

Just four months ago, Anthropic's $65 billion Series H valued the company at $965 billion. A public offering above $2 trillion would represent more than twice that valuation in a matter of months.

There is growth behind the increase. Anthropic said its run-rate revenue surpassed $47 billion in May. The prospectus reviewed by Reuters also shows how capital-intensive that growth has been, including enormous commitments to cloud computing and infrastructure.

The valuation remains a potential IPO target rather than an established public-market value. Pricing, timing, and other terms can change before an offering reaches investors.

A potential $2 trillion-plus IPO would put that extraordinary valuation jump to the test. Anthropic was valued at $965 billion just four months ago, leaving public-market investors to decide whether its rapid growth warrants a price tag that has more than doubled since May.

AI opportunity meets AI risk

The prospectus also arrives during an unusual moment for Anthropic.

Amodei has spent September publicly warning about the dangers of increasingly powerful AI systems. The prospectus itself discusses potentially catastrophic risks from advanced AI even as Anthropic prepares investors for a company that could command one of the largest valuations ever attached to a public debut.

That tension, extraordinary commercial expectations alongside extraordinary warnings about the underlying technology, could become part of the story as Anthropic moves closer to Wall Street.

What to Watch

• The November divide: The probability of an announcement before Nov. 1 remains just 25%, but it jumps to 68% before Dec. 1.
• The $2 trillion question: Any additional guidance on valuation could become as important as the timing itself.
• Official confirmation: The market resolves around an official IPO announcement, making Anthropic's next public step the key trigger.
• The AI-risk conversation: Anthropic is simultaneously selling investors on enormous commercial potential while continuing to emphasize the risks posed by increasingly capable AI.

For more on what prediction markets expect from AI, see our latest look at which company will have the best AI model at the end of 2026.