Anthropic's seven co-founders, including CEO Dario Amodei, are each positioned to pocket roughly $250 million in cash when the artificial intelligence company goes public next week — and that figure covers only the proceeds from their share sales. Each founder is estimated to retain stock worth about $18 billion, capping a remarkable windfall for the group that established the company five years ago.

Founded in 2021, Anthropic is seeking a $1.3 trillion valuation in its market debut and hopes to raise at least $80 billion through its IPO and private investments. PitchBook put the company's valuation near $965 billion in May.

Founders Can Sell Shares Without Giving Up Control

According to Anthropic's Tuesday filing, each founder currently holds 3.6% to 3.7% of the company's voting common stock. The seven plan to sell nearly 3.4 million shares apiece at an expected offering price of $70 to $78, after which each should retain about 3.2% of Class A shares. Together, they will own roughly 22%.

The fortune estimates are based on the $74 midpoint of the forecasted price range. The funds are not simply parked in checking accounts: while the value of the founders' remaining shares will fluctuate with Anthropic's stock price, the sales themselves will generate real revenue.

Dario Amodei serves as chief executive, and his sister, Daniela Amodei, is president and board chair. The other founders are Tom Brown, chief compute officer; Jared Kaplan, chief science officer; Sam McCandlish, chief architect; Jack Clark, who runs the Anthropic Institute, the company's internal AI safety research group; and Christopher Olah, who leads interpretability research.

Their stockholdings, however, do not tell the whole control story. Under Anthropic's complicated governance structure, the shares the founders collectively hold account for only around 11.2% of total voting power. A limited liability company owned by the founders will guarantee them at least 50.1% of all shareholder votes, with a majority of the founders determining how that controlling stake is voted. The structure enables the founders to appoint fewer than half of the directors on their own; a trust set up with members of the company's leadership and workers appoints a majority of the board. For public buyers, the upshot is that the Class A shares sold in the IPO will carry limited voting weight, leaving the company's direction with the founder-controlled structure even as the shareholder base widens.

Anthropic's seven founders wrote in their prospectus: "Our aim is to help humankind chart a safe course through this technological evolution, open new frontiers of discovery, and bring forth an age of miracles."

Investors Question the $1.3 Trillion Valuation

Anthropic has lined up $26 billion in private investment from Advanced Micro Devices (AMD), Broadcom (AVGO), Alphabet's Google (GOOGL), Micron (MU), Microsoft (MSFT), Nvidia (NVDA), and Taiwan Semiconductor Manufacturing Company (TSM). Those investors are buying Class N common stock at the same per-share price offered to IPO participants.

"Everyone who owns our stock, whether an institution or an individual, becomes part of that effort," the founders wrote in the prospectus. The privately placed shares are not registered in the public offering and will not face underwriter lockup agreements. That sets the deal apart from the lockups that typically restrict insider selling in the months after a listing — the privately placed shares can change hands from the first trading session.

Market conditions have grown less forgiving. The recent midterms have brought Democrats to power in Congress, and state ballot initiatives may have slowed AI data center construction. Rising interest rates will also make it more costly for businesses to borrow money to buy huge amounts of chips and electricity. Those pressures help explain why expectations have cooled.

Anthropic was recently considering a $2 trillion valuation, but CNBC reported that shareholders questioned whether even $1.5 trillion was realistic, with one investor describing that target as a "stretch." Still, institutional demand reportedly exceeds what SpaceX (SPCX) experienced at the same stage of its IPO, and orders already cover the shares available for allocation within the proposed price range. Anthropic expects to begin trading on the Nasdaq this month under the ticker ANT. The final pricing decision and the first trading session will show whether that demand holds at the targeted valuation.

SpaceX, Elon Musk's rocket and AI company, raised a record $85.7 billion when it went public roughly five months ago. Its market capitalization now sits just below $2 trillion, close to its debut valuation. Anthropic's minimum target of $80 billion would land just behind that record.

The IPO also follows a notable product push. On Monday, Anthropic introduced Claude Fable 5.2 and Claude Mythos 5.2, its first frontier models since Dario Amodei urged a slower pace of advanced AI development in September. The company says both models underwent extensive safety and alignment testing, supported by new evaluations and tools for monitoring their behavior after release. Arriving in the final stretch before pricing, the launches give incoming shareholders a recent operational datapoint to weigh alongside the prospectus financials.

"We hope you will share our ambition to see it though," the co-founders wrote to prospective shareholders.

Financially, Anthropic's revenue stood at $33.24 billion for the nine-month period to September 30, an increase of about 1,200% compared with the same period last year. The company posted a net loss of $104 billion, mainly due to changes in the value of convertible notes and derivative liabilities; its loss for the year 2025 was $25.1 billion. Those instruments fluctuate in value, making the headline loss largely accounting-driven. In an updated filing on Tuesday, Anthropic disclosed that its annualized revenue trajectory stood at about $81 billion in October, an increase of $10 billion from September.