Anthropic IPO Filing: $965B Valuation Shakes AI World

Anthropic just fired the starting pistol on what may be the most consequential technology IPO in a generation. The Claude maker confidentially filed its S-1 registration with the U.S. Securities and Exchange Commission on June 1, 2026. It arrived days after closing a staggering $65 billion funding round. The move sent shockwaves through Silicon Valley, Wall Street, and the entire AI industry.

A Near-Trillion-Dollar Valuation That Shocked the Market

The numbers are hard to overstate. Anthropic’s Series H round priced the company at a post-money valuation of $965 billion. That figure surpasses rival OpenAI’s most recent private valuation of $852 billion — marking the first time Anthropic has led that race. The round was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. It raised more than double the $30 billion figure that had been reported just weeks prior during early negotiations.

Revenue growth is the engine behind that valuation. Anthropic’s annualized revenue run rate hit approximately $47 billion in May 2026. That is up from roughly $10 billion the prior year — a roughly five-fold jump in twelve months. The company expects to report $10.9 billion in Q2 2026 revenue alone. That single quarter would exceed its entire estimated revenue for 2025. Anthropic has also told investors it expects to report its first profitable quarter in Q2, projecting around $559 million in operating profit.

Claude Code Is the Product That Changed Everything

The explosive growth did not happen in a vacuum. It was driven by a product: Claude Code, Anthropic’s AI coding assistant. Claude Code surpassed $1 billion in annualized revenue within six months of its launch. Enterprise developers and Fortune 500 companies adopted it at a breathtaking rate. More than 1,000 business customers now spend at least $1 million annually with Anthropic. Eight of the Fortune 10 are Claude customers. The company now counts over 300,000 business customers of all sizes — compared to fewer than 1,000 just a few years ago.

Roughly 80 percent of Anthropic’s revenue comes from enterprise customers, compared with around 40 percent for OpenAI. That skew toward corporate clients makes the revenue stickier. Enterprise contracts are harder to cancel than consumer subscriptions. Analysts at CNBC and D.A. Davidson noted that Anthropic became laser-focused on coding when most competitors were chasing images and video. That bet paid off massively.

The IPO Race: Anthropic vs. OpenAI vs. SpaceX

The confidential filing sets up what analysts are calling a historic cluster of mega-listings. SpaceX has already filed its prospectus and is heading toward a roadshow. OpenAI is preparing its own confidential SEC filing, targeting a Q4 2026 window. Analysts at Wedbush Securities called it an “opening of the floodgates” for the IPO market. Goldman Sachs estimates the AI IPO wave of 2026 could generate $160 billion in U.S. IPO proceeds for the full year — four times 2025 levels.

Anthropic is getting to market first, which matters. The company that lists first is widely expected to capture the largest share of early investor enthusiasm. OpenAI executives have reportedly expressed concern about being beaten to the public market. Investment bankers now widely expect Anthropic to debut above the $1 trillion mark when it officially lists, likely targeting an October 2026 window. That would rank it among the top 15 most valuable publicly listed companies in the United States on its first day of trading.

Amazon and Google Have Billions on the Line

Two tech giants have enormous skin in this game. Amazon first invested in Anthropic in 2023, and its stake has since grown to be worth roughly $74 billion on paper. In Q1 2026 alone, Amazon booked $16.8 billion in pre-tax gains from its Anthropic position. Google, meanwhile, holds roughly 14 percent of Anthropic in straight equity, hard-capped contractually at 15 percent. At Anthropic’s current $965 billion valuation, that stake represents a paper gain of enormous scale. The S-1, when it goes public, will put a precise number on what may be one of the most valuable corporate stakes in Silicon Valley history. Other major backers include Microsoft, Nvidia, Sequoia, General Catalyst, and sovereign wealth funds from Singapore, Qatar, and Abu Dhabi.

Risks Investors Will Scrutinize

Public market investors will be tougher than private ones. Anthropic’s projected operating margin of around 5 percent is thin for a company seeking a near-trillion-dollar valuation. Compute costs remain the single biggest expense. Running Claude at scale requires enormous amounts of computing power. Anthropic struck a deal with SpaceX to use compute at SpaceX’s Colossus data center in Memphis, Tennessee. Under that agreement, Anthropic will pay SpaceX $1.25 billion per month through May 2029. Any deceleration in enterprise AI adoption, or a major capability leap from OpenAI, Google DeepMind, or Meta AI, could compress the valuation multiple quickly.

There is also an unprecedented governance structure to consider. Anthropic is incorporated as a Public Benefit Corporation. A Long-Term Benefit Trust sits above short-term investor pressure. Neither Amazon nor Google holds voting rights or board seats, despite their massive investments. That structure has never been tested at public-market scale. It may be one of the defining governance questions of the 2026 IPO season.

Conclusion

Anthropic’s confidential IPO filing is the most consequential AI business event of 2026 so far. A company that barely registered five years ago has outpaced OpenAI in private valuation, delivered one of the fastest revenue ramps in tech history, and is now positioning itself for a landmark Wall Street debut. The Anthropic IPO will test whether the AI industry’s staggering private valuations can survive contact with public-market scrutiny. The answer, expected this autumn, will define the trajectory of AI investment for years to come.

Originally reported by CNBC. Analysis by the FastCustomAI Editorial Team.