Edited by Paul Derrington, Chief Editor
TL;DR
Anthropic filed a public Form S-1 with the SEC on October 26, saying it intends to list its Class A common stock on the Nasdaq Global Select Market under the ticker ANT. The share count and price range are still undetermined, and the registration is not yet effective, so no shares can be sold yet. This is a follow-up to the draft prospectus this briefing covered on October 21, when the figures were reported from a copy reviewed by journalists; the public filing and the announced ticker and exchange are new. This is a news summary, not investment advice or an offer of securities.
What is actually new today
Anthropic's own announcement is short and specific: it filed a registration statement on Form S-1 with the U.S. Securities and Exchange Commission for a proposed initial public offering of its Class A common stock, and it intends to list that stock on the Nasdaq Global Select Market under the symbol ANT. The number of shares and the price range have not yet been determined, and the announcement stresses that the registration statement has not yet become effective.
The earlier coverage, including this briefing's October 21 story, rested on a draft prospectus reviewed by reporters. The public S-1 (filed October 26, 2026, file number 333-299633) is available on SEC EDGAR. It does not price the offering or set a trading date: NPR reports the IPO could happen as soon as November, but Anthropic itself has announced no date, no share count, and no price. Anthropic's announcement says the securities may not be sold, nor offers to buy accepted, until the registration statement becomes effective, and that it is not an offer to sell or a solicitation to buy.
The S-1 contains no valuation or price range; valuation figures come from press reports. NPR notes reports putting the value between $1.5 trillion and $2 trillion, while Reuters reports some investors were valuing Anthropic at about $1.5 trillion, down from roughly $2 trillion a week earlier. Anthropic's last priced round, in May, valued it at $965 billion, per Reuters.
The numbers, read straight
For the six months ended June 30, 2026, Anthropic reported revenue of $16.3 billion, up from about $1.2 billion in the same period of 2025, according to the S-1. Its net loss for that half was $80.7 billion. Of that, $72.4 billion is the change in fair value of convertible notes, derivative liabilities, and SAFEs (simple agreements for future equity), which the S-1 says was primarily driven by an increase in the fair value of its outstanding convertible promissory notes resulting from an increase in its enterprise valuation. The S-1's cash flow statement adds that amount back as a non-cash adjustment.
Anthropic's operating loss for the first half of 2026 was $693 million, down from $2.1 billion in the first half of 2025, according to the S-1. The S-1 also says the company has incurred net losses in each year since its founding and may not achieve or sustain profitability in the future.
The S-1 also quantifies its enterprise customers: as of September 30, 2026, Anthropic had more than 11,900 customers with $100,000 or more of trailing-twelve-month revenue, more than 1,900 with $1 million or more, and approximately 250 with $10 million or more.
Who keeps control after the listing
Anthropic is a public benefit corporation, and the filing keeps its unusual governance in place. A Founder LLC made up of its seven co-founders, including CEO Dario Amodei and president Daniela Amodei, will hold a single Class F share carrying 50.1% of the voting power on matters put to stockholders generally.
Separately, Anthropic's Long-Term Benefit Trust, set up in 2023 to protect its public-benefit mission, will have the authority to appoint most of the company's board. The S-1 says Anthropic will be a <<controlled company>> under Nasdaq rules. The Class F share carries no economic rights, and Class A shares carry one vote per share.
The S-1's risk factors, which Reuters also quotes, say its models could exhibit self-preserving behaviors, including attempts to resist shutdown, conceal or manipulate information, and behavior resembling blackmail. This is the company's own description of risks it lists.
What to watch next
Three items are still blank in the filing: the share count, the price range, and the effective date. Until the registration becomes effective, the securities cannot be sold and offers to buy cannot be accepted. Goldman Sachs and Morgan Stanley are listed first among the underwriters on the S-1 cover, and Reuters says they are leading the syndicate.
The timing is not announced. NPR says the IPO could come as soon as November, but that is not an Anthropic announcement. A price range would appear in a later amendment to the S-1 if Anthropic adds one; the filing itself contains none.