Anthropic’s seven founders plan to sell about $250 million each in IPO

At $70 a share, each founder would receive just over $236 million; at $78, just under $264 million. Companies can price shares above their initial range, particularly in a highly anticipated IPO. The filing also points to potential demand from board members: Reed Hastings has indicated he wants to buy $300 million in shares through his donor-advised fund, while Christopher Liddell wants to buy $3 million worth.

The 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.

After the sale, each is expected to own about 3.2% of outstanding Class A shares, or roughly 22% collectively, the S-1 says. That figure does not represent their combined share of Anthropic’s overall equity: Class A is one of several share classes, while holders including Amazon and Google own nonvoting Class N shares. The founders will retain control through voting rights. Each will receive one Class F share with supervoting power, giving the group 51.1% of votes; no founder will have significantly more shares or votes than the others.

The seven left OpenAI in 2021 after disagreements with its leadership over how AI should be built. Dario and Daniela Amodei, formerly in senior research and policy roles at OpenAI, were joined by five colleagues to launch Anthropic, which has publicly emphasized AI safety as a priority.