Anthropic, the San Francisco–based maker of the Claude AI assistant and one of the world’s most valuable private companies, is accelerating preparations to sell stock to the public, setting up what could become the defining initial public offering of the artificial intelligence boom. After a $65 billion Series H round in May that lifted its valuation to about $965 billion, bankers and analysts say the company is now expected to file for an IPO as soon as late 2026, testing whether public markets will support a near‑trillion‑dollar price tag for an AI pure play.
From quiet upstart to near‑trillion‑dollar candidate
Anthropic has spent the past two years evolving from a relatively low‑profile OpenAI rival into what Investopedia calls “one of the most valuable private firms in any industry,” thanks to aggressive fundraising and headline‑grabbing AI models.
In February, the company raised $30 billion in a Series G round at a $380 billion valuation, led by GIC and Coatue. Three months later, it closed a $65 billion Series H, pushing its post‑money valuation to around $965 billion and overtaking OpenAI’s last reported valuation in the process. Reuters and the New York Times report that those back‑to‑back rounds are widely seen in the market as pre‑IPO positioning, giving the company enough capital for massive compute spending while setting a reference point for an eventual stock price.
Investopedia notes that Anthropic’s near‑$1 trillion valuation “dramatically increases the size of this year’s IPO pipeline,” with the startup “expected to file to go public before the end of the year” as one of the largest listings on the horizon.
IPO preparations: banks, lawyers, and timelines
Anthropic has not publicly announced an IPO nor filed a registration statement with the U.S. Securities and Exchange Commission. But a series of moves strongly suggest that an offering is in the works:
- Reuters reported, citing the Financial Times, that Anthropic has engaged Wilson Sonsini, a law firm known for steering major tech listings, to prepare for a potential IPO “as soon as 2026.”
- The same report said Anthropic has held informal talks with Goldman Sachs, JPMorgan, Morgan Stanley, and other large banks about underwriting the deal, although no lead manager has been chosen.
- Investor briefings described by Forbes and investment newsletters suggest a tentative target of October 2026 for the listing, with the company considering raising roughly $60 billion in new capital, a figure that would place the deal among the biggest tech IPOs on record.
A pre‑IPO analysis from Forge Global and other secondary‑market platforms notes that Anthropic had, even in 2022, floated October 2026 as an internal target window, giving it time to scale revenue and shore up governance before facing public markets.
For now, Anthropic’s official line is cautious. A company representative told Reuters previously that it has “made no decision on timing or certainty” of going public, emphasizing that any IPO would depend on market conditions and regulatory clarity around AI.
A “shadow IPO market” around a private stock
Even while the company remains private, pockets of the market already behave as if Anthropic were public.
Nasdaq Private Market estimates that Anthropic’s most recent secondary‑market price for private shares was $629.47 per share as of May 18, up nearly 2,000 percent from early transactions in 2023. Notice.co, a retail‑facing site that tracks private‑company valuations, lists Anthropic stock at around $667 per share, though it stresses that the stock remains inaccessible to ordinary investors and trades only in limited secondary deals.
Yahoo Finance reports that a growing “shadow IPO market” surrounds Anthropic, complete with informal tickers, price charts and online speculation about valuation swings despite the absence of a public listing. The company has responded by warning on its website, and via investor communications, that any “unauthorized sales” of its stock without corporate approval may be deemed void, a signal that it is trying to control the cap table in advance of an IPO.
Why Anthropic needs public capital
At the heart of Anthropic’s push toward public markets is the economics of large‑scale AI: training and running cutting‑edge models requires staggering amounts of computing power.
Forbes reports that the company plans to spend roughly $19 billion on training and inference compute in 2026, a figure that nearly matches its projected full‑year revenue. In a recent investor deck described by multiple outlets, Anthropic outlined a path to $50 billion in annualized revenue, driven by the Claude chatbot, developer APIs, enterprise tools and specialized models like its Mythos cyber‑security system.
That kind of capital intensity is why Anthropic has relied on giant private rounds backed by Amazon, Google, and sovereign wealth funds, but it also points toward public markets as the next logical source of financing. An IPO would give the company:
- Access to deeper, more diversified capital for compute contracts and data‑center buildout.
- A liquid stock currency to use in acquisitions of smaller AI startups, cloud‑infrastructure partners, or specialized hardware firms.
- A publicly visible valuation that can underpin long‑term contracts with governments and large enterprises looking for durable AI partners.
Investopedia notes that Anthropic’s leap to a near‑$1 trillion private valuation “dramatically increases” the stakes for a listing: investors will expect rapid revenue growth and a plausible path to long‑term margins, even as the company pours cash into GPUs and custom chips.
What investors will be buying
If and when Anthropic sells stock to the public, buyers will essentially be betting on three pillars of its business:
1. Claude and enterprise AI services
Anthropic’s Claude assistant and its API platform are already embedded in a growing roster of corporate workflows, from software development and customer service to legal review. Marketwise and other investment sites argue that Claude’s positioning as a safety‑first, enterprise‑grade AI assistant helps Anthropic win deals with regulated industries.
2. Infrastructure partnerships
The company has deepened strategic alliances with Amazon Web Services and Google Cloud, which not only buy Anthropic’s services but also provide discounted access to the GPU infrastructure it needs. Those relationships are likely to be highlighted in IPO materials as de‑risking both costs and distribution.
3. Model and research pipeline
Alongside Claude, Anthropic is developing advanced models like Mythos, which it touts as particularly strong at detecting software vulnerabilities and reasoning through complex problems. Investors are being told that this research pipeline can support high‑margin vertical products, in security, code analysis and specialized agents, beyond generic chatbots.
Analysts quoted by Investopedia and Marketwise say that if Anthropic can demonstrate durable subscription revenue and high switching costs, the sense that once a company embeds Claude deeply, it is costly to move away — its near‑trillion‑dollar valuation will look more defensible.
A market test for AI valuations
Anthropic’s stock sale will not occur in a vacuum. It will arrive after a series of large tech IPOs and in the shadow of OpenAI’s own expected listing, which Reuters says is also being prepared for the coming year.
Because the private market has been willing to price Anthropic so aggressively, public investors will be asking whether AI economics can justify valuations that put a five‑year‑old startup in the same league as some of the world’s largest public companies. Reddit discussions and analyst notes cite scenarios in which an IPO might actually come at a lower valuation than the latest private rounds, especially if broader markets wobble or if early AI‑related listings struggle.
Conversely, if Anthropic goes public near its current marks and trades well, it could reopen the IPO window for a long list of AI‑adjacent firms — chipmakers, cloud‑infrastructure providers, application‑layer startups, that have been waiting for a marquee success to reset pricing.
Either way, the offering will mark a turning point where the world’s enthusiasm for generative AI is measured not just in venture rounds and hype cycles, but in daily stock quotes and quarterly earnings. For Anthropic, it will be the moment when the private‑market story it has sold to a select few investors becomes a public one — tested in real time by millions.