Anthropic filed its initial public offering registration statement publicly with the Securities and Exchange Commission Monday, putting a frontier AI lab's governance on the public record for the first time. The charter filed with it gives the company's Long-Term Benefit Trust the right to elect a majority of the board and gives a founders' share 50.1% of the stockholder vote. For investors, boards and regulators, those documents now define how much control public shareholders in a leading AI developer will actually get.
What Happened
The SEC's EDGAR system accepted Anthropic, PBC's Form S-1 at 9 a.m. Eastern time on Oct. 26, according to the filing index, which lists 78 documents. The company said in the filing it plans to list on the Nasdaq Global Select Market under the ticker "ANT," the Associated Press reported. AP said the filing sets up a debut next month that could be the largest IPO ever. Anthropic said in June that it had confidentially submitted a draft, TechCrunch reported at the time.
How the Charter Splits Control
A restated certificate of incorporation filed as Exhibit 3.3 is undated and keyed to the closing of the IPO. It keeps Anthropic a public benefit corporation, a company legally bound to pursue a stated public purpose alongside profit. That purpose is "to responsibly develop and maintain advanced AI for the long-term benefit of humanity."
A single share of Class T stock, tied in the charter to the Anthropic Long-Term Benefit Trust, elects "the smallest number of directors that constitutes a majority" of the board. That right lasts as long as a Class T share is outstanding.
A single Class F share, held by Anthropic Founders, LLC, gets its votes from a formula designed to give it 50.1% of the total. Class A shares carry one vote each; Class N and Class E shares have no general vote. Class A holders, the Class F holder and certain preferred holders together elect the directors the trust does not name, so the founders' share would decide those seats too. The Class F share ends if the founders' company gives it up or dissolves, or 450 days after that company has fewer than three qualifying members for 90 straight days.
Changing the public benefit purpose, the company's PBC status, the board's powers or the Class T rights requires 80% of the whole board plus the trust. The alternative is a shareholder route that, while the founders' share exists, needs that share's approval; afterward, it needs 85% of Class A stock.
The charter in force before the offering, Exhibit 3.1, shows the trust already elects four of seven directors. It also gives the chief executive a tie-breaking vote on deadlocked matters in which the chief executive has no conflict of interest. The trust's own rules are in a separate trust agreement.
Why It Matters
This is the first public prospectus from a frontier AI lab, and its governance design will be the reference point for boards, investors and regulators weighing how such companies should be controlled. Buyers of Class A shares would get an economic stake with little influence over who sits on the board. Some investors have already objected: The Primary Wire reported this month, citing Reuters, that New York City's comptroller urged the company to delay the IPO over safety and governance concerns.
The structure also answers a question left open in September, when The Primary Wire reported, citing TechCrunch, that chief executive Dario Amodei and six co-founders were seeking 50.1% of the vote. The filed charter writes that figure into a single share with defined end points.
What to Watch
Watch for the offering size and price range in amended filings, and for how SEC review shapes the disclosures. The Primary Wire reported, citing Bloomberg, that Anthropic aimed to start marketing the deal as soon as the week of Nov. 9. Another open question is whether the trust agreement, the document the charter relies on for the trust's own terms, becomes public before shares trade.
