Anthropic's seven co-founders stand to hold about $18B of stock each after the IPO

Each of Anthropic's (ANT) seven co-founders will own about $18B of stock after the company's IPO, based on the holdings in its latest prospectus and the top half of its price range.

The seven are CEO Dario Amodei, President Daniela Amodei, Tom Brown, Jack Clark, Jared Kaplan, Sam McCandlish and Chris Olah. After the offering, each will hold between 237M and 241M shares.

Anthropic plans to sell its shares at $70 to $78 each. What each stake is worth depends on where the price lands:

• At $70, the bottom of the range: $16.6B to $16.9B
• At $74, the midpoint: $17.6B to $17.8B
• At $78, the top: $18.5B to $18.8B

Together, the seven would hold about $130B of stock at $78.

The IPO lifts their stakes from about $14B each in Anthropic's last funding round, CNBC notes. Investors in that round, in May and June, paid $58.90 per share, adjusted for a 10-for-1 stock split in September.

The co-founders are also selling a small part of their holdings in the IPO. Each sells about 3.4M shares, worth about $250M at the midpoint. Together, their shares make up about 3% of the 825M on offer, and Anthropic sells the rest.

The stakes give each co-founder only about 1.6% of the votes. Control comes from elsewhere: a single Class F share, held by a company the seven run together, carries 50.1% of the voting power.

All seven have pledged to give 80% of their Anthropic stock to charity. The prospectus calls the pledges voluntary and revocable, and says they are not legally binding.

Anthropic expects to set the final price on Wednesday, November 18. Its shares are due to start trading on the Nasdaq on Thursday, November 19.

Sources & Further Reading

1. "Anthropic, PBC Amendment No. 2 to Form S-1." Securities and Exchange Commission. November 10, 2026.
2. "Meet the seven co-founders of Anthropic." CNBC. November 14, 2026.