All seven Anthropic co-founders will each cash out about $250M in the IPO

Anthropic is moving toward an initial public offering that could value the company at $1.4 trillion. In its new S-1 filing, the company disclosed a detail it had not previously shared: all seven co-founders plan to sell exactly the same number of shares, 3,378,378 each. TechCrunch reported the arrangement on November 10.

The company has floated an unusually broad price range of $70 to $78 a share. At the $74 midpoint, each founder would take in just under $250 million; at the low end the figure is a little over $236 million, and at the high end just under $264 million. For an IPO this heavily anticipated, pricing above the initial range is entirely possible.

The filing already hints at demand. Board member Reed Hastings has indicated he wants to buy $300 million worth of shares through his donor-advised fund, while fellow board member Christopher Liddell wants to buy $3 million. Such indications are usually read as a sign of strong pre-listing interest.

The seven co-founders are CEO Dario Amodei, president and board chair Daniela Amodei, chief compute officer Tom Brown, head of public benefit Jack Clark, chief science officer Jared Kaplan, chief architect Sam McCandlish and interpretability research lead Christopher Olah. They left OpenAI in 2021 after disagreements over how AI should be built, a founding story that has since become industry lore.

After the sale, each founder will own about 3.2% of the outstanding Class A shares, or roughly 22% collectively. That is not their share of the company overall: Class A is only one of Anthropic's share classes, and holders including Amazon and Google own nonvoting Class N stock, so the founders' stake in total equity will be considerably smaller.

The control structure is the part that matters most. Each founder will also receive one share of Class F stock carrying supervoting rights. Collectively the founders will control 51.1% of the votes, but no single founder will hold significantly more shares or votes than the others. A very large cash-out, in other words, leaves decision-making with the founding group.

For investors, the filing offers two reference points. First, the founders are cashing out at listing rather than locking up long term, unusual but not unheard of in mega-cap tech IPOs, and still read as a signal about risk appetite. Second, the separation of votes from equity lets Anthropic take public money while preserving a governance style closer to a foundation. What to watch next: the final price, the oversubscription multiple, and whether a $1.4 trillion valuation holds once the stock trades.