Anthropic's Seven Cofounders Split a Potential $200 Billion Almost Evenly

Anthropic's seven cofounders stand to share as much as $200 billion in stock when the company goes public — split into seven nearly identical piles. Each founder, including CEO Dario Amodei and his sister, president and board chairperson Daniela Amodei, holds between 231 million and 244 million shares, according to the registration statement filed Monday. At an IPO valuation of $1.5 trillion to $2 trillion — the range media reports indicate Anthropic hopes to reach — each stake is worth roughly $21 billion to $30 billion. For scale, that is nearly seven equal fortunes the size of a mid-tier global billionaire's, carved from one company.

The numbers come with a caveat Anthropic itself flags: the company has not priced its shares, and the exact figures remain subject to change.

What does the filing actually show?

Each founder's equity package includes exactly 2,185,400 stock options exercisable now and 639,500 restricted stock units that vest after the IPO. Fortune's analysis puts each cofounder's ownership at between 1.4% and 1.5% of the company. The founders' holdings align, within a few shares, with the grants disclosed for the Amodeis — implying the other five received identical awards, though only the Amodeis appear in the pay tables as executive officers.

The structure flattens the pyramid that governs pay at most mega-cap companies. The other five cofounders — Tom Brown, Jared Kaplan, Sam McCandlish, Jack Clark, and Chris Olah — hold C-level titles such as chief compute officer and chief science officer, yet show no visible pay gap. Each founder also gets one vote in the entity that will control the shareholder vote, with a separate trust electing the majority of the board.

Robin Ferracone, founder of compensation consulting firm Farient Advisors, called the arrangement unusual. "It's unusual to give all the founders the same thing," Ferracone said. In her view, such parity typically erodes over time as awards vest and pay becomes tied to position.

How much do the Amodeis earn?

The siblings take equal pay, including identical annual increases. Last year, each earned $654,167 in salary plus stock and options the filing values at about $13 million combined — roughly $330 million at a $2 trillion valuation. July raises lifted both salaries to $1.4 million.

In February, Anthropic granted each Amodei about 1.4 million stock options and 2.4 million additional RSUs, followed by another 537,000 RSUs in July. Those RSUs pay out in quarterly installments over several years after the IPO, provided both remain at the company. At a $2 trillion valuation, the grants are worth about $505 million each.

"We take internal parity into account when determining executive compensation," the registration statement says. "Each co-founder is paid compensation." It also calls the seven "distinctly equipped to be stewards of our mission" — while singling out Dario and Daniela as "critical to setting our strategic direction" and "difficult to replace." The praise for two, on top of pay parity for seven, is a tension the filing does not resolve.

Anthropic filed its S-1 on Monday, October 26, according to the registration statement.

How does this compare with SpaceX?

The contrast with the last mega-IPO is stark. Before SpaceX's June 2026 offering, the company gave Elon Musk 1.3 billion restricted shares across two awards tied to milestones — one attached to a human colony on Mars, the other to data centers in space. If achieved, those awards could be worth $650 billion to $700 billion. No one else at SpaceX comes close.

Anthropic's founders, by contrast, have pledged 80% of their stock to philanthropy, a potential $80 billion to $165 billion total gift — though the pledges are not legally binding. The award structure lets them keep control even after donating away their wealth. Musk, in an X post last week, pledged to give every child in America a share of his SpaceX stock.

The founders cannot sell immediately. All seven are listed as selling stockholders, but lockup terms allow partial sales about six months after the offering and the rest after about a year. Some have already cashed in: the Amodeis sold shares in an April tender offer at $25.91 apiece, per the S-1.

One governance question sits unresolved. Both board members who will oversee executive pay after the IPO are Anthropic investors. Vas Narasimhan, CEO of Novartis, chairs the compensation committee and bought about $10 million of stock in May through a company he owns with his wife, weeks after joining the board. The other member, Spark Capital general partner Yasmin Razavi, oversees funds that have invested $777 million in Anthropic since 2023. Equal pay among founders may prove easier to defend than a comp committee with skin in the game.