Priya Raman

Anthropic’s seven co-founders plan to sell roughly $250 million of stock each in the company’s initial public offering, according to Bloomberg’s review of a revised prospectus released Tuesday. At the expected $70-$78 range, the founders would unload a combined $1.75 billion at the midpoint.

Each founder’s proposed sale amounts to roughly 1.5% of their total holding, Bloomberg says. The transaction would leave each with a stake worth around $18 billion, according to The Wall Street Journal. Cash would rise; economic ownership would barely move.

What does Anthropic receive from the IPO?

Certain existing stockholders are selling 23,648,646 of the 825 million Class A common shares in the offering, and Anthropic will receive no proceeds from those sales. The transaction therefore benefits the sellers, not Anthropic’s balance sheet.

Anthropic launched its IPO roadshow, the investor marketing period before pricing, on Tuesday at a $70-$78 price range. Pricing is scheduled for Nov. 18, with shares starting to trade the following day, Nov. 19, according to Bloomberg.

The Class A shares are slated for the Nasdaq Global Select Market under the ticker “ANT.” A registration statement has been filed with the U.S. Securities and Exchange Commission and must become effective before any stock can be sold.

How much control would the founders keep?

Before the offering, each founder owns 3.6% to 3.7% of Anthropic’s voting common stock. Afterward, each would hold roughly 3.2% of its Class A stock, The Wall Street Journal reports. Collectively, the seven would own close to 22% of shares outstanding but only about 11.2% of the total vote.

The mechanism is a separate Class F share. One such share, held by an entity the founders control, carries 50.1% of the voting power on most matters put to shareholders, according to The Wall Street Journal. The founders would monetize a small slice of their holdings without surrendering effective control.

That structure separates economics from governance. Investors buying Class A shares would hold an economic interest in Anthropic, while one founder-controlled Class F share would preserve the founders’ decisive position on most shareholder votes.

Who is selling?

• Dario Amodei: co-founder and chief executive officer.
• Daniela Amodei: Dario’s sister, co-founder, president and board chair.
• Tom Brown: co-founder and chief compute officer.
• Jared Kaplan: co-founder and chief science officer.
• Sam McCandlish: co-founder and chief architect.
• Jack Clark: co-founder who heads the Anthropic Institute.
• Christopher Olah: co-founder who leads interpretability research.

Dario Amodei and Daniela Amodei also joined two earlier tender offers, a mechanism for buying shares directly from holders, in June 2025 and April 2026. The IPO sale would add another liquidity event for the two siblings.

What do the lock-ups restrict?

Anthropic detailed the lock-up agreements in its amended filing. Under these contractual restrictions, covered holders cannot sell, pledge or hedge their stock without the underwriters’ written consent.

A founder may publicly announce a permitted transaction after giving the underwriters’ representatives and Anthropic three business days’ written notice. That creates a defined route for post-IPO sales while leaving each transaction subject to underwriter approval.

What is the strategic trade-off?

The founder sale is large in dollars but small in economic terms: about $250 million each, or 1.5% of their holdings, against stakes still worth around $18 billion. Control changes little because the Class F share carries 50.1% on most shareholder matters.

For new investors, the mismatch is the central governance fact. The founders would command close to 22% of the economics and about 11.2% of the vote, yet their Class F holding preserves majority control. The Nov. 18 pricing and Nov. 19 trading dates remain conditional on the SEC registration becoming effective.