Anthropic files S-1 for Nasdaq ANT under founder and trust control

Hallway talk about Anthropic’s November multiple had already moved. On 26 October 2026 the company put a registration statement on EDGAR, and the story shifted from anonymous valuation colour to what the prospectus itself will let Class A buyers own.

Anthropic, PBC’s news post that morning said the firm had filed Form S-1 for a proposed initial public offering of Class A common stock, intended to list on the Nasdaq Global Select Market under the symbol ANT, with share count and price range still undetermined. Goldman Sachs & Co. LLC and Morgan Stanley & Co. LLC are named for prospectus requests.

The SEC accepted the filing at 09:00:11 Eastern; file number 333-299633, accession 0001628280-26-067168. Those are the primary facts. Everything below is read from that prospectus and the company’s announcement, with secondary outlets used only where they restate attributable lines from the same document.

Confidential June paperwork becomes a public ANT registration

Anthropic had already told the market, on 1 June 2026, that it had confidentially submitted a draft registration statement. That kept financials and governance text off EDGAR while the staff reviewed. The 26 October public S-1 is the first time the audited consolidated figures, the capital-structure diagram, and the risk-factor language sit in a document anyone can download.

The cover still withholds the commercial ask. Estimated offering price per share is printed as blank dollars. Proceeds language on the same pages likewise holds blank midpoints. Anthropic’s own announcement repeats that the number of Class A shares and the price range have not yet been determined. Underwriters are visible: Goldman Sachs takes lead left; Morgan Stanley sits on the right; a long syndicate follows. Listing venue and ticker are fixed as applied-for facts, while the offering price remains blank on the cover.

That sequence matters for readers who lived through the mid-October investor-day circuit. Attendee-attributed third-quarter colour and anonymous trillion-dollar talk remain secondary. The new primary is the filed Form S-1.

H1 puts $16.3 billion of revenue beside an $80.7 billion net loss

The summary consolidated statements of operations in the prospectus show revenue of $41 million (2023), $386 million (2024), and $4.585 billion (2025). For the six months ended 30 June 2026, revenue is $16.286 billion, against $1.163 billion in the first half of 2025.

Operating expenses for that same 2026 half include $8.945 billion of compute and infrastructure and $3.152 billion of personnel. Operating loss compresses to $693 million, from $2.135 billion in the prior-year half and from $8.060 billion for full-year 2025.

The headline net loss for H1 2026 is $80.748 billion. Inside that figure, change in fair value of convertible notes, derivative liabilities, and SAFEs is $72.388 billion, which the risk factors attribute primarily to an increase in the fair value of outstanding convertible promissory notes as enterprise valuation rose. Net loss for full-year 2025 was $41.965 billion, with a $34.308 billion fair-value line in the same category.

Elsewhere in the MD&A, Anthropic states that no single customer represented more than 10% of revenue for the nine months ended 30 September 2026, and that about 79% of revenue in the three months ended that date came from customers outside the top five, up from about 64% in the first quarter.

Model versions released in the six months ended 30 September 2026 accounted for over 80% of revenue in that third quarter. Revenue from sales through CSP marketplaces was about 11%, 32%, 47%, and 48% of total revenue for 2023, 2024, 2025, and the six months ended 30 June 2026, respectively.

Take-or-pay and minimum-purchase language appears in the risk factors: long-term compute agreements obligate payment regardless of utilisation. As of and subsequent to 30 September 2026, aggregate committed spend is disclosed as “more than” a blank dollar figure, with further blanks for amounts due before 2030, through 2045, and in the next twelve months. Liquidity lines on the same pages are likewise blank ahead of IPO proceeds. The public text therefore confirms the shape of the obligation without publishing the aggregate number in those summary passages.

Class A economics arrive under Class F votes and Class T directors

The filing’s novel capital structure now sits in the registration statement, where private-company FAQ language used to carry it. Anthropic is a Delaware public benefit corporation whose certificate names a company purpose: the responsible development and maintenance of advanced AI for the long-term benefit of humanity.

The Long-Term Benefit Trust holds Class T common stock with authority, generally, to elect and remove Class T directors, who together will constitute a majority of the authorised board. Class T has no economic rights and does not otherwise vote on matters submitted to stockholders generally.

Immediately prior to completion of the offering, a single share of Class F common stock goes to a Founder LLC organised by the co-founders. Dario Amodei (chief executive and director) and Daniela Amodei (president and board chair), together with Tom Brown, Jack Clark, Jared Kaplan, Sam McCandlish, and Christopher Olah, will initially be the sole members of that LLC.

Class F is entitled to an aggregate number of votes equal to 50.1% of total voting power on matters submitted to stockholders generally, including election of directors other than Class T directors, and carries no economic rights.

Class E stock is authorised for employees excluding co-founders, with limited voting and no economics. Class A and Class N share economics; Class A carries one vote per share, while Class N is largely held by strategic partners and has no voting rights except as required by law.

The prospectus states that this governance structure has “no direct public company precedent,” and that it is likely to limit unsolicited merger proposals, tender offers, or proxy contests for director removal, which may deprive stockholders of a chance to sell at a premium. That language is Anthropic’s own risk factor.

PBC balancing duties now sit beside SEC registration mechanics

As a Delaware public benefit corporation, the board must balance stockholders’ pecuniary interests, the best interests of those materially affected by the company’s conduct, and the stated public-benefit purpose. The LTBT is described as an independent body of financially disinterested trustees with expertise in AI safety, national security, public policy, and social enterprise. Class A purchasers buy into that statutory balancing act and into the Class T / Class F voting design at the same time they buy residual economics.

Securities-law mechanics are ordinary even when the capital stack is unusual. The registration statement has been filed and has not yet become effective. Securities may not be sold, and offers to buy may not be accepted, until effectiveness. The company’s 26 October announcement is careful on that point; so is the prospectus legend. Until an effective registration and a priced deal, ANT remains an applied-for symbol on a filed S-1.

Fair-value losses and blank commitment lines still need careful reading

The $80.7 billion H1 net loss is a real GAAP line. It is also dominated by mark-to-market movements on instruments that reprice when private valuation rises. Treating that figure as cash burn of the same magnitude misreads the statement of operations next to the $693 million operating loss and the $8.945 billion compute line.

Calling the company “adjusted profitable” from investor-day colour still waits on whatever amended periods bankers later put in the roadshow prospectus; this public S-1’s summary table stops at 30 June 2026 for the half-year columns cited above.

Blank dollars for aggregate committed spend mean those summary passages omit a printed total. The take-or-pay risk factor remains either way. Secondary reports that circulated draft compute totals before the public file should be tagged as secondary until they match a filled amendment.

Trillion-dollar IPO valuation chatter from mid-October remains attributed investor discussion. No company offer price on this S-1 carries those hallway figures.

The ask, the share count, and the filled compute ledger are still open

Still unsettled on the public registration statement: the number of Class A shares offered, the price range, assumed midpoint proceeds, and the numeric aggregate of multi-year compute and lease commitments in the summary commitment passages. Effectiveness, roadshow timing, and any mid-November listing date remain outside the four corners of today’s file. Third-quarter revenue that attendees heard in mid-October sits outside the half-year column printed in the summary table above; whether an S-1/A restates Q3 before pricing is a process question for counsel and the underwriters.

For buyers and for the wider AI trade, the newly priced fact is control. Class A gets economic exposure to Claude’s revenue machine under a PBC purpose, an LTBT-elected board majority, and a 50.1% founder vote. The newly public operating picture is extreme top-line scale with still-heavy compute spend and a GAAP loss inflated by valuation marks. The unsettled fact is the one the cover still leaves blank: what multiple Goldman and Morgan Stanley will ask the public book to pay once those dollars are filled in.