Key facts
- Each of Anthropic's seven co-founders plans to sell 3,378,378 shares, the S-1 filing says.
- At the $74 midpoint of the $70 to $78 range, each founder would take in just under $250 million.
- At the $70 low end each founder would receive just over $236 million; at $78, just under $264 million.
- After the sale each founder would own about 3.2% of outstanding Class A shares, or roughly 22% collectively, per the filing.
- The founders would collectively control 51.1% of votes through supervoting Class F stock, the filing says.
- Board member Reed Hastings indicated he wants to buy $300 million of shares through his donor-advised fund.
Anthropic disclosed in a new S-1 filing that each of its seven co-founders plans to sell 3,378,378 shares in its initial public offering, according to a report dated November 10, 2026. The company has floated an initial price range of $70 to $78 a share. At the $74 midpoint, each founder would take in just shy of $250 million; at $70 each would receive just over $236 million, and at $78 just under $264 million.
The report said the offering could value Anthropic at $1.4 trillion, and noted that companies in heavily anticipated IPOs can often price shares above the initial range. The S-1 already points to demand: board member Reed Hastings has indicated he wants to buy $300 million of shares through his donor-advised fund, and board member Christopher Liddell wants to buy $3 million worth.
The seven co-founders are CEO Dario Amodei; Daniela Amodei, president and chair of the board; Tom Brown, chief compute officer; Jack Clark, head of public benefit; Jared Kaplan, chief science officer; Sam McCandlish, chief architect; and Christopher Olah, interpretability research lead.
After the sale, each would own about 3.2% of total outstanding Class A shares, or roughly 22% collectively, the S-1 says. That is not their share of the company overall: Class A is one of several share classes, and other holders including Amazon and Google hold non-voting Class N shares, so the founders' stake in total equity will be considerably smaller. Each will also receive one share of Class F stock carrying supervoting rights, giving the founders collectively 51.1% of votes, with no single founder holding significantly more shares or votes than the others.
The seven left OpenAI to start Anthropic in 2021 after disagreements with OpenAI's leadership over how AI should be built, the report said. Siblings Dario and Daniela Amodei, who held senior research and policy roles at OpenAI, were joined by five fellow OpenAI colleagues.