Anthropic Files Prospectus: Seven Co-Founders Each Hold About 1.4% Equity, Combined Value Up to $200 Billion

According to a Fortune analysis, Anthropic is about to launch an IPO, and the equity stakes held by each of its seven co-founders could be worth a combined total of up to $200 billion after the company goes public. Calculated on the valuation range of $1.5 trillion to $2 trillion cited in some media reports, each founder's stake would be worth roughly $21 billion to $30 billion. Notably, all seven—including CEO Dario Amodei and President and Board Chair Daniela Amodei—hold almost exactly the same number of shares, completely upending the "pyramid-style" compensation structure common at large tech companies.

This structure matters greatly to investors. All seven founders are listed as selling shareholders in the IPO, but under lock-up restrictions they can sell some shares no earlier than about six months after listing, with the remainder becoming sellable only after about a year. In addition, the seven have pledged to donate 80% of their shares to charity; if fulfilled, total donations could reach $80 billion to $165 billion, although the pledge is not currently legally binding.

Near-equal equity split, a rare precedent in Silicon Valley

According to the Fortune analysis, each co-founder holds between 231 million and 244 million shares, and each holds exactly the same 2,185,400 immediately exercisable stock options and 639,500 restricted stock units (RSUs) that will vest after the IPO. On that basis, each of the seven holds roughly 1.4% to 1.5% of the company, with their combined stakes worth about $200 billion.

Robin Ferracone, founder of compensation consulting firm Farient Advisors, said Anthropic's "egalitarian approach" to its founding team is very rare, and the seven-person founding team is itself "relatively large." "Giving all founders the same thing is unusual in itself," she said. "Typically, as vesting cycles progress, pay gradually diverges and becomes tied to role."

In its prospectus filed Monday, Anthropic described the founding team as "a group uniquely capable of mission stewardship," while specifically noting that Dario and Daniela are "critical to setting the company's strategic direction" and "difficult to replace."

The Amodei siblings: equal pay, parallel promotions

The filing shows that because the two Amodeis are the only executives the company identifies as such, their compensation is fully disclosed. Last year, the siblings each received an annual salary of $654,167, plus stock and options valued at a combined total of about $13 million in the filing—worth about $330 million at a $2 trillion valuation. In July this year, both received raises, bringing their annual salaries to $1.4 million.

In February this year, Anthropic granted each of them about 1.4 million stock options and 2.4 million RSUs, followed by an additional 537,000 RSUs in July. Those RSUs will vest quarterly after Anthropic's listing, provided the two remain employed. At a $2 trillion valuation, those grants are worth about $505 million to each of them.

The company explained in its registration statement: "We consider internal pay equity when setting executive compensation. Each co-founder receives the same compensation." The other five co-founders—Tom Brown, Jared Kaplan, Sam McCandlish, Jack Clark and Chris Olah—hold C-level positions including Chief Computing Officer and Chief Science Officer but do not appear in the company's compensation table. However, all seven hold exactly the same number of options and RSUs, all vesting no later than the end of November, closely matching the disclosed grants to the two Amodeis and suggesting the other five received equivalent grants.

A stark contrast with the Musk model

This structure stands in sharp contrast to SpaceX's compensation arrangements. SpaceX was the last company to go public at a similar scale; in the months before its June 2026 IPO, Musk received a total of 1.3 billion restricted shares in two tranches, both tied to market-cap milestones—one related to Mars colonization and the other to space data centers. If all targets are met, those grants could be worth as much as $650 billion to $700 billion, with no one else at the company remotely comparable.

By contrast, Anthropic's seven founders have pledged to donate 80% of their shares to charity, and their shareholding structure allows them to retain control of the company even after giving away most of their wealth.

Notably, the two Amodeis had already sold some shares in a tender offer in April this year at $25.91 per share.

Board members overseeing the compensation structure are themselves investors

The two board members who will oversee executive compensation after Anthropic's IPO are both investors in the company. Novartis CEO Vas Narasimhan chairs Anthropic's compensation committee; weeks after joining the board in May this year, he bought about $10 million of Anthropic stock through a company he holds jointly with his wife. The other compensation committee member, Yasmin Razavi, is a general partner at Spark Capital, whose funds have invested a cumulative $777 million in Anthropic since 2023.

Anthropic has not yet priced the IPO, and details may still change. Risk disclosure and disclaimer

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