This brother and sister co-founded Anthropic five years ago. Now they are worth $19b each
The staggering fortunes of Anthropic’s seven co-founders have been revealed as the company heads to Wall Street. They have pledged to give most of it away.
The founders’ majority voting control is somewhat offset by Anthropic’s Long-Term Benefit Trust, however, which has the power to elect and remove four members of the company’s seven-person board. The trust is designed to continue indefinitely, while the founders’ special voting share will eventually expire once fewer than three qualifying founders remain, whether because of death, incapacity, resignation or because they have sold or given away more than roughly 98 per cent of the Class A shares they held at the IPO.
The trust is governed by five trustees, who largely select their own replacements.
San Francisco-based Anthropic was started in 2021 by a group of former OpenAI employees who left following disagreements over the company’s future direction. Anthropic had an $US80.7 billion net loss on revenue of $US16.3 billion in the first six months of 2026, versus a $US13 billion net loss on revenue of $US1.2 billion in the same period last year, the filing shows.
Anthropic confirmed that chief executive officer Dario Amodei and President Daniela Amodei sold some of their shares in the company’s tender offers in 2025 and 2026. Last year, Anthropic kicked off a $US157 million tender that saw both siblings unload some of their stock. This year, Anthropic did a $US4.7 billion tender; the Amodeis, chief financial officer Krishna Rao, and Holden Karnofsky, the spouse of Daniela Amodei, all sold shares in that offering.
