Anthropic's IPO filing shows 846.8 million shares in its benefit fund and $2.7 billion in donation-match charges

Anthropic's initial public offering prospectus, made public on October 26, says the AI company has put 846,840,960 shares into its Anthropic Public Benefit Fund and has booked about $2.7 billion in charges for matching employees' charitable gifts since late 2025.

Anthropic, which makes the Claude AI assistant, is a public benefit corporation, a for-profit company required by Delaware law to weigh a stated public purpose alongside shareholders' interests. Its Form S-1 registration statement says it has applied to list its Class A shares on the Nasdaq Global Select Market under the symbol ANT. The price range was left blank, so the filing does not put a dollar value on the fund's shares. The Next Web reported that the prospectus repeats the 5% fund pledge and the founders' 80% pledge alongside half-year revenue of $16.3 billion.

What does the filing say about the benefit fund?

The fund now has its shares and named managers. The prospectus says Anthropic contributed 846,840,960 Class N shares, 5% of its fully diluted shares as of June 30, 2026, to Anthropic Public Benefit Fund, LLC, a wholly owned subsidiary. When the company announced the plan on October 18, it said the stake was subject to stockholder approval, as we reported in our story on the 5% commitment.

The board will decide how the fund's shares are allocated until it approves a governance structure. Authority is then expected to pass to the fund's managers, whom the filing names as Dario Amodei, Daniela Amodei, Jack Clark and Neil "Buddy" Shah. Shah chairs the Long-Term Benefit Trust, the body that can elect a majority of Anthropic's board. The shares may be donated to third parties or sold, the filing says. The board may add up to 2% more of the company's shares each time the stock price rises 50% above the previous milestone, beginning with the IPO price, but any further contributions are at its discretion.

How binding is the founders' 80% pledge?

It is not binding. The filing says each co-founder has pledged to dedicate 80% of their personal equity to philanthropic causes, and calls these "voluntary, revocable expressions of each co-founder's philanthropic intent" that "do not constitute legally binding obligations." The co-founders may give over time through donor-advised funds, charities, private foundations or other vehicles, and the filing warns that donated shares later sold by recipients could weigh on the share price.

A donor-advised fund, or DAF, is an account at a public charity: the donor gives assets to the sponsor and later recommends grants from it, as explained in our guide to donor-advised funds. The filing says Anthropic has irrevocable proxy agreements with two DAF sponsors, Daffy Charitable Fund and Dechomai Asset Trust. They give Dario Amodei, the chief executive, the right to vote Anthropic shares those DAFs hold, except shares that came from him or his family. Neither DAF holds 5% or more of any class of Anthropic's voting stock, the filing says.

What has the employee donation match cost?

The match has become a large line in Anthropic's accounts. Under a plan adopted in November 2021, employees can pledge part of their equity to eligible nonprofits, including 501(c)(3) charities, and the company may match in Class N shares or cash. The table below is our own compilation from the S-1. The charges are non-cash accounting expenses tied to the value of matched shares, not cash grants.

By our arithmetic, the charges total about $2.67 billion over those four quarters. The 2025 figure was about 4% of total operating expenses, the filing says. As of June 30, 2026, 933.7 million shares were still reserved for future matches, which is more than the 846.8 million shares in the benefit fund. The filing does not give the match ratio.

What nonprofits should watch

In our view, three things in the filing matter for charities. We have not seen any statement from the fund's managers about where its first grants will go. Shares can reach nonprofits from the benefit fund, from founders' DAFs and from employees' matched gifts, each with its own decision-makers. The founders' pledge carries no legal obligation. And DAF sponsors holding Anthropic stock have agreed to let the chief executive vote it, a term donors and charities may want to understand before shares change hands.

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