Anthropic is moving closer to what could be one of the most significant tech IPOs in recent memory, with a potential valuation of $1.4 trillion on the horizon. As part of its newly filed S-1 registration document, the company has revealed the share sale plans for each of its seven co-founders - and the numbers are striking.

Each of the seven co-founders intends to sell exactly 3,378,378 shares in the offering. Anthropic has set an unusually wide initial price range of $70 to $78 per share. At the midpoint of $74, that works out to just under $250 million per founder. At the lower bound of $70, each would walk away with slightly more than $236 million, while at the top end of $78, the figure climbs to just below $264 million per person.

It is worth noting that for highly anticipated public offerings, final pricing often lands above the initial range, meaning the actual proceeds could exceed even those upper-end projections.

Early Signals of Strong Investor Demand

The S-1 filing already points to robust interest from within Anthropic's own boardroom. Board member Reed Hastings, the co-founder and former CEO of Netflix, has expressed his intention to purchase $300 million worth of shares through his donor-advised fund. Fellow board member Christopher Liddell has also indicated plans to acquire $3 million in shares.

These commitments from insiders are often read by the broader market as a vote of confidence in the company's long-term prospects, and in Anthropic's case, the scale of Hastings' planned purchase in particular is notable.

Who Are the Seven Co-Founders?

The seven individuals set to each receive roughly $250 million from the IPO are:

• Dario Amodei - Chief Executive Officer
• Daniela Amodei - President and Chair of the Board
• Tom Brown - Chief Compute Officer
• Jack Clark - Head of Public Benefit
• Jared Kaplan - Chief Science Officer
• Sam McCandlish - Chief Architect
• Christopher Olah - Interpretability Research Lead

Ownership Structure and Voting Control

Following the share sale, each co-founder will hold approximately 3.2% of the total outstanding Class A shares, according to the filing, which amounts to roughly 22% collectively across all seven. However, that figure does not represent their total stake in the company as a whole.

Anthropic operates with multiple share classes. Class A shares represent only one portion of the overall equity structure. Major investors including Amazon and Google hold Class N shares, which carry no voting rights. As a result, the founders' proportional ownership of Anthropic's total equity is considerably lower than the Class A figures suggest.

Despite that, the founders collectively retain firm control over the company's direction. Each co-founder will receive one share of Class F stock, a special class that carries supervoting rights. Together, the seven founders will command 51.1% of all voting power. Notably, no single founder holds a meaningfully larger number of shares or votes than any other, reflecting a deliberately equal distribution of influence among the group.

A Company Born Out of Disagreement

The origins of Anthropic have become well-known within the technology industry. All seven co-founders previously worked at OpenAI, the research organization behind ChatGPT, before departing in 2021 to establish Anthropic. Their exit followed reported disagreements with OpenAI's leadership regarding the direction and philosophy behind AI development.

Siblings Dario and Daniela Amodei held senior roles at OpenAI - Dario as VP of Research and Daniela in policy and operations - before leaving alongside five colleagues to build a new kind of AI company. From its earliest days, Anthropic positioned itself publicly as an organization placing AI safety at the center of its mission, a stance it has maintained even as it has grown into one of the most heavily funded and closely watched AI companies in the world.

With an IPO of this scale approaching, the founders' combined payout would represent one of the largest simultaneous liquidity events for a founding team in the history of the technology sector.