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Anthropic IPO Filing Shows Each of Its 7 Cofounders Worth $13B+

The filing says Tom Brown slightly tops CEO Dario Amodei, while a special voting share would give the seven founders 50.1% control.

  • On Monday, Anthropic filed its S-1, revealing that its seven co-founders hold massive ownership stakes in the AI startup, with Chief Compute Officer Tom Brown owning about 244 million shares.
  • To maintain control, Anthropic plans to issue a special Class F share to a Founder LLC immediately before the IPO, which will carry 50.1% of shareholder voting power.
  • In an unusual move, each co-founder pledged to dedicate 80% of their personal equity to philanthropic causes, while the company expects a valuation exceeding $1.5 trillion soon.
  • Although Anthropic billed Benjamin Mann as a co-founder in Singapore, the S-1 excludes him from the Founder LLC, yet an Anthropic spokesperson confirmed Monday his role remains unchanged.
  • Analysts suggest the exclusion may reflect a governance shift, though others note it is not unusual for early contributors to avoid public-facing roles after a startup goes public.
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It has been revealed that the seven co-founders of Antropic will be able to exercise 50.1% of the total voting rights even after the initial public offering (IPO). A succession mechanism has also been established to designate up to 10 undisclosed successors in preparation for situations where a founder passes away or is unable to exercise voting rights. This is according to the ‘Antropic Founders’ document, an attachment to Antropic’s Listing Ap…

(Seoul = Yonhap News) Reporter Jung Joo-ho = The seven co-founders of Antropic can designate up to 10 successors to inherit their voting rights on a private list...

·Seoul, Korea (the Republic of)
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Business Insider broke the news in New York, United States on Monday, October 26, 2026.
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