Anthropic’s 7 cofounders are each worth $14 billion already—and that could double in an IPO. They’ve promised to give most of it away

Seven people quit OpenAI to cofound Anthropic in January 2021. Five-and-a-half years later, each of them owns almost exactly the same slice of the AI company that just officially released its paperwork for an initial public offering. Each founder owns about 240 million shares, according to the S-1 registration statement Anthropic filed with the Securities and Exchange Commission on Monday.

At $58.90 a share—the split-adjusted price investors paid in Anthropic’s most recent private funding round this spring—each stake would be worth between $13.7 billion and $14.4 billion. Together, the seven hold about 1.69 billion shares, roughly 10% of the company.

If Anthropic lists at the roughly $2 trillion valuation that Wall Street estimates have pointed to, each cofounder would be worth between $27 billion and $29 billion.

The seven cofounders are:

His sister, Daniela Amodei, the company’s president and board chair

Tom Brown, chief compute officer

Jared Kaplan, chief science officer

Sam McCandlish, chief architect

Chris Olah, who leads interpretability research

Jack Clark, who leads the Anthropic Institute

All seven are listed as selling stockholders in the offering. How many shares each plans to sell is left blank.

Benjamin Mann has been with Anthropic since its founding and “is often referred to as a cofounder,” the filing says. But he isn’t a member of the founders’ LLC, so he won’t help decide how the controlling Class F share votes. The S-1 says its references to “cofounders” don’t include him. He isn’t in the ownership table either, so his stake isn’t disclosed.

Benjamin Mann has been with Anthropic since its founding and “is often referred to as a cofounder,” the filing says. But he isn’t a member of the founders’ LLC, so he won’t help decide how the controlling Class F share votes. The S-1 says its references to “cofounders” don’t include him. He isn’t in the ownership table........

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