Anthropic Confidentially Files for Initial Public Offering Anthropic’s quiet paperwork with U.S. regulators has ignited a very public race: who will be first to turn the AI boom into a trillion‑dollar stock market debut, Anthropic or its chief rival OpenAI?

On June 1, Anthropic disclosed that it had confidentially submitted a draft S‑1 registration statement to the U.S. Securities and Exchange Commission, giving it “the option to go public after the SEC completes its review” while leaving the number of shares and price undecided. The company stressed the move is not yet an offer to sell securities and that any IPO will depend on “market conditions and other factors.”

The filing capped a frenetic funding run. Less than a week earlier, Anthropic raised $65 billion in a Series H round at a $965 billion post‑money valuation, the largest venture round in history and one that briefly pushed it ahead of OpenAI’s $852 billion valuation. Coverage in outlets from TechCrunch to Business Insider framed the step as Anthropic “blazing toward” a blockbuster IPO and joining “the race to IPO” with OpenAI.

By the afternoon of June 1, major tech and business publications reported that Anthropic had “officially filed to go public,” calling it the world’s most valuable startup and noting that key financial details would remain hidden until a public S‑1 appears. The Financial Times cast the move as a test of Wall Street’s appetite for the AI boom, alongside forthcoming offerings from SpaceX and OpenAI.

On June 2, analysts began parsing what the confidential filing might mean. Axios highlighted “Anthropic IPO storylines to watch,” from its current “pole position in the AI ‘race’” to the risk that corporate AI spending could slow. A separate Business Insider piece collated reactions from market watchers, who argued that Anthropic’s strength in enterprise AI, rather than consumer chatbots, could “make or break” its IPO valuation.

Meanwhile, deal‑making accelerated. Reports on June 3 said Anthropic had picked Morgan Stanley and Goldman Sachs to lead the IPO, with JPMorgan also on the deal, and was targeting an October listing. Another disclosure, this time from SpaceX, revealed just how capital‑intensive that path is: the rocket company supplies Anthropic with 325,000 Nvidia chips at a cost of $1.25 billion per month, underlining the enormous infrastructure burn behind the AI gold rush investors are being asked to fund.

[1] Anthropic confidentially submits draft S-1 to the SEC — Anthropic’s own notice that it “confidentially submitted a draft registration statement on Form S-1” to the SEC and that any IPO will depend on market conditions. https://www.anthropic.com/news/confidential-draft-s1-sec

[2] Anthropic files for its IPO — Axios reports Anthropic’s $65 billion Series H at a $965 billion valuation, calling it the largest venture round ever and noting it leapfrogged OpenAI. https://www.axios.com/2026/06/01/anthropic-ipo-openai

[3] Anthropic has officially filed to go public — The Verge describes Anthropic as “the world’s most valuable startup” at a $965 billion valuation, ahead of OpenAI’s $852 billion. https://www.theverge.com/ai-artificial-intelligence/941016/anthropic-has-officially-filed-to-go-public

[4] Anthropic files to go public — TechCrunch details the confidential SEC filing, near‑$1 trillion valuation, and the recent $65 billion Series H round. https://techcrunch.com/2026/06/01/anthropic-files-to-go-public/

[5] Anthropic files confidential S-1, blazing toward blockbuster IPO — Business Insider frames the S‑1 as a “major step” in a race with OpenAI, with both expected to exceed $1 trillion valuations. https://www.businessinsider.com/anthropic-submits-s-1-joins-ipo-race-with-openai-2026-6

[6] Anthropic has officially filed to go public — The Verge emphasizes the escalating IPO “race” between Anthropic and OpenAI and explains why financial details remain confidential for now. https://www.theverge.com/ai-artificial-intelligence/941016/anthropic-has-officially-filed-to-go-public

[7] Anthropic files for blockbuster initial public offering — The Financial Times situates Anthropic’s plans in a broader contest with OpenAI and SpaceX, testing Wall Street’s AI enthusiasm. https://www.ft.com/content/4f82f41c-24e7-4323-899a-17a04badd29e

[8] Anthropic IPO storylines to watch — Axios outlines five key themes for investors, from Anthropic’s current market lead to regulatory and spending risks. https://www.axios.com/2026/06/02/anthropic-ipo-storylines-openai

[9] What Smart People Are Saying About Anthropic’s IPO — Business Insider gathers views from Sam Altman and analysts on whether enterprise AI strength can sustain Anthropic’s lofty valuation. https://www.businessinsider.com/anthropic-ipo-filing-wall-street-analysts-investors-reactions-2026-6

[10] Anthropic picks Morgan Stanley, Goldman Sachs to lead IPO — The Next Web reports Anthropic’s choice of lead banks, an October target, and SpaceX’s disclosure that it supplies 325,000 Nvidia chips at $1.25 billion per month. https://thenextweb.com/news/anthropic-morgan-stanley-goldman-sachs-ipo-lead-banks

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