Anthropic founders set equal share sales in IPO, retaining voting control

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Anthropic founders IPO sale

Highlights

Each of Anthropic's seven co-founders plans to sell 3,378,378 shares in the IPO at $70–$78 per share, totaling $236–$264 million each.
Board members Reed Hastings and Christopher Liddell indicated early interest to purchase $300 million and $3 million of Anthropic IPO shares, respectively.
Post-IPO, the founders retain collective control with 51.1% voting power via Class F supervoting shares despite only holding 22% of Class A shares.

Share sale structure and pricing range

As reported by TechCrunch, Anthropic says in its S-1 filing that each of its seven co-founders plans to sell 3,378,378 shares in the IPO. Based on the company's indicated price range of $70 to $78 a share, that translates to proceeds of just over $236 million each at the low end, just shy of $250 million at the midpoint of $74, and just under $264 million each at the high end.

The broad pricing range also leaves room for a higher final valuation if investor demand remains strong. The filing points to early interest from board members, with Reed Hastings indicating he wants to buy $300 million of shares through his donor-advised fund and Christopher Liddell indicating interest in purchasing $3 million of shares.

The seven co-founders are CEO Dario Amodei, President and 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.

Founder control and company background

After the share sale, each founder will own about 3.2% of the total outstanding Class A shares, or roughly 22% collectively, according to the filing. That figure does not represent their full share of Anthropic's total equity because the company has multiple share classes, and investors including Amazon and Google hold non-voting Class N shares.

Even so, the founders as a group remain in control of the company. Each co-founder is also set to receive one share of Class F stock with supervoting rights, giving the group 51.1% of the votes, while no single founder holds materially more shares or voting power than the others.

Anthropic was founded in 2021 after the seven left OpenAI following disagreements over how AI should be developed. The company has since positioned itself as more focused on AI safety than rivals, including its founders' former employer.

As highlighted earlier, ByteDance’s Alignment & Preparedness team showed how major AI labs are scaling safety, testing, and oversight efforts.

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