Anthropic Commits $48B in Shares to New Public Benefit Fund as IPO Nears

Anthropic has set aside 5% of its shares — worth about $48 billion — for a newly established public benefit fund. The size of that stake can rise as the company’s valuation climbs.

The plan requires shareholder sign-off just weeks before the artificial intelligence (AI) company’s anticipated November listing. Would-be investors still lack the crucial operating details.

What Does the Fund Mean for Anthropic IPO Buyers?

Anthropic, the company behind the Claude chatbot, unveiled the fund on Sunday.

The $48 billion number is pegged to Anthropic’s $965 billion valuation from a May funding round in which it raised $65 billion.

The board could add up to 2% more each time the company’s value rises 50% above an agreed baseline. That baseline has not been made public.

Anthropic likewise has not said whether the shares would be newly issued. Fresh issuance would shrink each current holder’s stake.

The company has also not explained how the fund would convert its stock into cash.

So investors lining up for the initial public offering (IPO) are left short of three specifics: the source of the shares, the baseline, and the payout method.

We’re committing a portion of Anthropic’s shares to the Anthropic Public Benefit Fund, a new wholly owned entity dedicated entirely to the public benefit.

It will start off with 5% of our shares. For every 50% increase in the company’s value over a set baseline, we can…

— Anthropic (@AnthropicAI) October 18, 2026

Is the $48 Billion Figure Solid?

The figure is tied to the company’s worth. A valuation near $1.5 trillion for the offering has been raised by certain investors. The initial stake would be close to $75 billion at that level.

That pricing is not accepted by everyone. In an October report, research firm New Constructs estimated Anthropic’s equity value at as little as $144 billion. 5% of that works out to around $7.2 billion.

Supply is another concern. Hedge fund manager Paul Tudor Jones has cautioned that fresh shares from AI companies, including Anthropic, could drag on equities in 2027.

Who Could Receive the Money?

No recipient has been identified. Possibilities range from substantial donations to nonprofits to direct cash payments to particular groups.

Workers harmed by AI were one example Anthropic gave. In July, it put $200 million toward research meant to soften AI-driven job losses.

The fund is organized as a limited liability company (LLC), not a tax-exempt charity. Anthropic said it will not finance lobbying or political contributions.

The company says the equity flows to the fund instead of boosting executive pay awards.

Including earlier pledges, roughly 20% of Anthropic’s shares are now dedicated to the public good, according to the company. OpenAI says its nonprofit foundation holds 26% of the company.

The fund’s governance rules and valuation milestones are slated to be published by Anthropic in the months to come.