Anthropic filed for an IPO Monday that could be the largest in history, disclosing 14-fold revenue growth and its first profitable quarter — but analysts warn an underperformance could trigger a broad reset across AI valuations in both public and private markets.
Anthropic filed for an initial public offering Monday, positioning the Claude creator for what could be the largest stock market debut in history — and setting up a moment that investors and analysts say will serve as a referendum on the broader artificial intelligence economy.
Investors are already measuring Anthropic's potential market cap in the trillions, which would make it only the third company to go public at that valuation, after Saudi Aramco and Elon Musk's SpaceX, which debuted in June. OpenAI, which has confidentially filed to go public, has said its own debut likely will not come until 2027.
The filing arrives at a fragile moment. Neoclouds and data center companies have faced sustained selling pressure in recent weeks, prompting Australia's Firmus to withdraw its IPO plans and SK Hynix's U.S.-based Solidigm unit to do the same. Interest rates are rising, and the AI trade has shown signs of fatigue in public markets.
"If it underperforms expectations, it'll be a little bit of a house of cards," said Jai Das, co-founder of Sapphire Ventures, whose career in tech investing dates to the 1990s.
Anthropic's financials, disclosed in its prospectus, reflect both the scale of the opportunity and the cost of pursuing it. Second-quarter revenue reached $11.56 billion, up from $787 million in the same period a year earlier — a 14-fold increase. The company reported $974 million in operating income for the quarter, its first profitable quarter after five consecutive quarters of operating losses. It held nearly $132 billion in cash, equivalents, and short-term investments at the end of June. Over the first half of the year, however, losses exceeded $80 billion.
"It is, I think, better than feared," said Rohit Kulkarni, partner and chief AI officer at Burnham Park Capital Markets. "There could have been more negative tidbits."
The company's business is deeply entwined with some of the largest names in technology. Close to half its revenue comes from Claude being sold through cloud divisions at Microsoft, Amazon, and Alphabet, all of which hold investments in Anthropic. The IPO prospectus shows that $77 billion in notes can be issued to Amazon, Broadcom, and Google. Microsoft and Nvidia have agreed to invest $15 billion as the company expands its computing capacity. Alphabet has also committed to backstopping Anthropic for a data center in Texas.
Bessemer Venture Partners and Menlo Ventures both confirmed that Anthropic represents their largest investment ever. Software companies including Adobe and Salesforce have integrated Claude into their products, extending the company's reach well beyond direct enterprise sales.
Fortune 500 companies, Anthropic noted in its prospectus, are committing less than 0.1% of their total expenses to its models and services — a figure the company frames as evidence of significant runway ahead.
The IPO prospectus names only OpenAI and Google as direct competitors, though Anthropic acknowledged facing competition from a "broader set of model providers," including open-weight and open-source models. Some investors see cheaper, customizable open-weight alternatives as a structural risk. Others are less concerned.
"I think there's going to be room for frontier models like Anthropic and OpenAI and SpaceX, and I think there will be room for open-weight models," said Michael Monaghan, portfolio manager at Founder ETFs. "It's way too soon to say that one is going to disintermediate the other."
The stakes extend well beyond Anthropic itself. More than one-third of the S&P 500's total value derives from tech's trillion-dollar companies, all of which are deepening their exposure to AI. In the private markets, check sizes have grown sharply even as IPO activity has remained sparse.
"If they don't perform well, they will become the bellwether for AI," said Brad Bernstein, a managing partner at growth equity firm FTV Capital. "Their valuation will reflect that performance variation, and then it'll just be a trickle-down effect to all the stuff going on with the excess capital that's getting poured into the venture AI world. Everything is going to have to sort of be reset."
How Anthropic trades in its first weeks as a public company will likely set the tone for AI valuations across both public and private markets well into 2027.
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