Anthropic has reportedly filed a confidential S-1 with the SEC, thrusting the Claude AI maker into a blockbuster 2026 IPO race alongside SpaceX and OpenAI.
Anthropic, OpenAI, and SpaceX are accelerating toward public markets in one of the most dramatic tech IPO waves ever. On June 1, reports emerged that Anthropic submitted its draft registration, following its massive late-May funding round and amid SpaceX’s advanced timeline.
Anthropic Confirms Confidential IPO
Anthropic has officially confirmed that it confidentially submitted a draft registration statement on Form S-1 to the U.S. Securities and Exchange Commission on June 1, 2026, for a proposed initial public offering of its common stock.
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This filing gives the company the flexibility to proceed with an IPO once the SEC completes its review.
The announcement, made under Rule 135 of the Securities Act of 1933, emphasizes that the number of shares and offering price have not yet been determined, and the IPO remains subject to market conditions and other factors.
The move follows Anthropic’s recent $65 billion Series H funding round at a $965 billion post-money valuation and comes as the AI industry sees heightened IPO activity.
Anthropic closed a $65 billion Series H on May 28 at a $965 billion post-money valuation, briefly surpassing OpenAI.
Its annualized revenue run-rate recently crossed $47 billion, fueled by explosive enterprise adoption of Claude models for coding and agentic workflows.
Record Valuations Drive the Surge
SpaceX leads the pack. It filed its public S-1 on May 20 after a confidential submission in April, targeting a June 12 Nasdaq listing under ticker SPCX.
The company aims for a $1.75–1.8 trillion valuation and up to $75 billion raise, potentially the largest IPO in history.
OpenAI confidentially filed around May 22 and eyes a September 2026 debut at $1 trillion+, building on its earlier $852 billion valuation.
These listings promise unprecedented access to frontier AI and space technology. Public investors will gain direct exposure to high-growth revenue streams, but also intense compute costs and competition.
Anthropic’s partnerships with Amazon and Google, plus major GPU commitments (including $1.25B/month highlighted in SpaceX filings), underscore the capital intensity.
The trio could drive massive index inflows and reshape portfolios as AI shifts from private hype to public accountability.
SpaceX’s roadshow is imminent, with pricing potentially this week. Anthropic and OpenAI will advance through SEC review toward public S-1s and Q4 roadshows.
Success hinges on sustaining growth amid regulatory scrutiny and profitability demands.
This convergence signals a maturing AI sector where trillion-dollar valuations meet public market rigor. Investors should watch upcoming filings closely for financial details that could set benchmarks for the next decade of innovation.
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