Anthropic Files for IPO at $965 Billion, Racing OpenAI to Wall Street

For three years, Anthropic was the cautious sibling of the artificial intelligence boom, the safety-obsessed lab that let OpenAI grab the headlines and the household-name product. On Monday, the company quietly rewrote that narrative. Anthropic confirmed it has submitted draft registration paperwork to the U.S. Securities and Exchange Commission for an initial public offering, a confidential Form S-1 that positions the maker of the Claude chatbot to potentially beat OpenAI to Wall Street and stage what could be one of the largest technology debuts in history.

The filing arrives at a staggering moment of momentum. Anthropic recently closed a $65 billion Series H funding round that valued the company at roughly $965 billion, vaulting it past OpenAI in private-market value for the first time. With the SEC paperwork now in motion, the underdog has become the front-runner, and the race between the two most consequential AI labs in the world has moved from the laboratory to the trading floor.

From $4 Billion to $50 Billion in a Single Year

The numbers behind the filing explain the urgency. As recently as July 2025, Anthropic was operating at roughly a $4 billion annualized revenue run rate. By the time it filed its draft S-1, that figure had ballooned past $50 billion, a roughly 80-fold surge driven almost entirely by enterprise demand for Claude in software development, customer service automation, and cybersecurity workflows.

The company projects second-quarter 2026 revenue of about $10.9 billion, more than double the prior quarter, and says it is on pace for its first profitable quarter. That trajectory, if accurate, would make Anthropic one of the fastest-scaling enterprises ever to approach the public markets.

Yet the most important figure has never left the building. "The number that determines everything is gross margin, which no one outside Anthropic has ever seen," said Harrison Rolfes, a senior late-stage research analyst at PitchBook. Training and running frontier models is extraordinarily expensive, and whether Anthropic's blistering top-line growth translates into durable profit remains the central question the eventual prospectus will have to answer.

The Investor Roster Behind the $965 Billion Bet

The Series H round read like a who's-who of late-stage technology investing. Altimeter Capital, Dragoneer, Greenoaks, Sequoia Capital, Capital Group, Coatue, and D1 Capital Partners were among the backers who poured in the $65 billion that set the $965 billion mark. For comparison, Anthropic was valued at roughly $9 billion in run-rate terms at the end of 2025, underscoring how rapidly the financial story has been rewritten.

Goldman Sachs, JPMorgan Chase, and Morgan Stanley are expected to lead the underwriting, the same banks lining up for OpenAI's anticipated listing. Their involvement signals that Wall Street's largest institutions view these AI debuts as manageable rather than destabilizing, even as the offerings approach a scale rarely seen.

A Two-Horse Race for the Public Market

Anthropic's move is impossible to read outside the context of its rivalry with OpenAI. The ChatGPT maker raised $122 billion in March at an $852 billion valuation and is preparing its own confidential filing in the coming weeks. By submitting first, Anthropic has gained the option to debut as early as this fall, ahead of its larger and more famous competitor.

Analysts framed the timing in stark terms. "OpenAI and Anthropic are in a race to go public before capital runs out," said Gil Luria of DA Davidson. Dan Ives, global head of technology research at Wedbush Securities, called the filing "a major step for Anthropic to get ahead of OpenAI as Altman and Co. prepare for their filing."

The speed of Anthropic's ascent has stunned even seasoned observers. "One of the biggest significances is how quickly Anthropic has overtaken OpenAI in a matter of 12 to 14 months," said Scott Stevens, founder and chief executive of Gray Peak Financial. "Their growth rate is much, much higher."

The Disclosure That Will Test the AI Thesis

Confidential filings shield financials from public view until closer to the roadshow, but once Anthropic prices its shares, the curtain lifts. For the first time, outsiders will see audited statements detailing how much it actually costs to build and serve frontier AI, and whether the enterprise demand fueling the run rate is as sticky as the valuation implies.

That transparency is precisely why analysts are watching. "Wall Street gets to see what's really going on with these companies," said Jamie Cox, managing partner at Harris Financial Group. Others are more pointed about the open questions. "When would Anthropic be reliably cash flow positive leading to real EPS growth?" asked Brian Mulberry, chief market strategist at Zacks Investment Management. Nate Elliott, an AI analyst at eMarketer, framed the broader stakes bluntly: "We're about to find out whether the market thinks AI is a consumer story or an enterprise story."

Risks Lurking in the Prospectus

The filing is not without clouds. Anthropic is locked in a legal dispute with the U.S. government over a Pentagon supply-chain risk designation, a fight the company warns could jeopardize billions of dollars in revenue. Beyond that specific threat, the debut lands amid intensifying debate over whether AI valuations have outrun fundamentals.

Some strategists worry that the simultaneous arrival of mega-listings represents an unprecedented transfer of risk to public investors. PitchBook has described the current pipeline as the largest concentration of pre-IPO capital ever brought to market at once. The concern is not whether AI is real, but whether prices like $965 billion leave any margin for error.

What Comes Next

The confidential nature of the filing means the share count and price remain unset, and the timeline depends on market conditions. Still, the signal is unmistakable. Anthropic, OpenAI, and SpaceX could collectively bring more than $200 billion of new public-market value to investors in a single fall window, a stress test of appetite for the technology that has dominated the past three years of investment.

For Anthropic specifically, the IPO would convert a safety-first research lab into a publicly accountable company answerable to quarterly earnings and the verdict of ordinary shareholders. As Matt Kennedy, senior strategist at Renaissance Capital, put it, "Virtually any private round Anthropic raised would have met equal enthusiasm in public markets." Whether that enthusiasm survives contact with the company's first audited gross margin is the question that will define not just Anthropic's debut, but the public market's reckoning with the entire AI era.