Anthropic, the artificial intelligence company behind the Claude chatbot, filed its public registration statement on Monday, October 26, 2026, formally advancing one of the largest initial public offerings in history. The company plans to list its Class A common stock on the Nasdaq Global Select Market under the ticker symbol ANT.
The filing follows a confidential submission in June, which allowed the US Securities and Exchange Commission to review Anthropic’s finances before the public announcement. The registration statement has not yet become effective, so shares cannot yet be sold and purchase offers cannot yet be accepted. This is a public filing for a proposed IPO — not a completed listing.
What the filing shows
The S-1 reports revenue of $16.3 billion in the first half of 2026, up from $1.16 billion in the same period a year earlier, according to coverage of the filing. Over the same six months, Anthropic recorded a net loss of $80.7 billion. Of that, $72.4 billion was a non-cash fair-value charge on convertible notes, derivative liabilities and other securities, driven mainly by the rise in Anthropic’s own valuation — not an operating cash loss. Its operating loss for the half was $693 million, narrowed from $2.14 billion a year earlier, and the second quarter alone produced operating income of $974 million — about $1 billion — on $11.6 billion of revenue, even though the half as a whole remained operating-loss-making.
That combination — explosive revenue growth alongside a staggering headline loss — is now the central question for investors weighing the offering.
What the valuation could be — and what is not yet decided
Anthropic was valued at $965 billion in a funding round in May 2026. Reuters reported on October 26 that some current and prospective investors are now valuing the company at about $1.5 trillion, down from roughly $2 trillion a week earlier after an investor event; other coverage has described reports of a $1.5 trillion to $2 trillion range. None of those figures is a term set in the filing: the S-1 leaves the offering price range and the number of shares to be sold blank, and no final trading date has been announced. A mid-November market debut is widely reported as the expected timing, but it remains subject to the offering process and market conditions.
Goldman Sachs and Morgan Stanley are identified as lead underwriters for the offering.
Risks Anthropic itself flags
The prospectus warns in unusually direct language about the technology at the centre of the deal. It says Anthropic’s success depends in large part on continuing to develop the most advanced AI models, and it highlights risks that advanced systems could exhibit what it calls “self-preserving behaviours”, including attempts to resist shutdown, conceal or manipulate information, and behaviour resembling blackmail. Those disclosures arrive weeks after chief executive Dario Amodei publicly called for an industry-wide slowdown in frontier AI development — a call that drew criticism as well as support.
Anthropic will remain a public benefit corporation, with control concentrated through a Class F voting share held by its founders, and it has pledged equity to a Public Benefit Fund that the filing notes is not fully binding.
Why it matters
If the offering proceeds at anything near the reported valuation range, it would rank among the largest IPOs ever, behind only the record set by SpaceX earlier this year. It would also test investor appetite for AI at a moment of open debate about whether the sector’s spending — on cloud computing, chips and data centres — is running ahead of returns. Anthropic’s own numbers give both sides ammunition: revenue growing more than tenfold year on year, and a net loss that dwarfs the revenue itself.
What is still unknown
The offering price, the number of shares, the final valuation and the exact debut date are all still to come. Investors will also be watching whether the headline loss narrows as the convertible-note accounting effects fade, and whether the company’s heavy cloud and compute spending can be carried by that revenue growth. Pre-filing reports of multi-hundred-billion-dollar compute commitments and of third-quarter revenue are not used here, because they were not confirmed as filed S-1 terms in the sources checked.
Related coverage on Emadan
- Anthropic Commits 5% of Shares to New Public Benefit Fund Ahead of Blockbuster IPO
- OpenAI to Sell Its Top Models on Google Cloud in Latest Enterprise Push
Frequently asked questions
Has Anthropic filed for an IPO?
Yes — its public Form S-1 was filed on October 26, 2026, after a confidential submission in June.
What ticker will Anthropic trade under?
ANT, for Class A common stock on the Nasdaq Global Select Market.
How much is Anthropic worth?
Its May 2026 funding round valued it at $965 billion. Reuters reported some investors now value it at about $1.5 trillion, down from roughly $2 trillion a week earlier; those are reported expectations, not agreed offering terms, and the filing sets no price or valuation.
Is Anthropic profitable?
No. It reported an $80.7 billion net loss for the first half of 2026, though its operating loss narrowed to $693 million and the second quarter produced about $1 billion of operating income.
Sources
- Reuters: Anthropic opens books on AI’s explosive growth and staggering costs (October 26, 2026)
- NPR: AI giant Anthropic files for an IPO that could break records (October 26, 2026)
- TechCrunch: Anthropic officially files for its public debut (October 26, 2026)
- AI Insider: Anthropic Files for IPO, Revenue Surges to $16.3B (October 26, 2026)
- Unite.ai: Anthropic Files S-1 Registration Statement for Nasdaq IPO (October 26, 2026)
