Who Controls Anthropic After It Sells Stock?

The stack above Class A

Anthropic is a Delaware public benefit corporation. Its stated purpose is "the responsible development and maintenance of advanced AI for the long-term benefit of humanity." Delaware law makes the board balance stockholder money, the interests of people materially affected by the firm''s conduct, and that purpose. On top of the PBC label sits the Long-Term Benefit Trust, created in 2023 as an independent body of five financially disinterested trustees. Through Class T stock, the trust generally elects and removes the Class T directors, who are meant to be a majority of the authorized board. Class T carries no economic rights and no general stockholder vote.

Beside the trust sits a single Class F share, issued at closing to a founders'' LLC whose initial members are Dario Amodei, Daniela Amodei, and the five other co-founders. That share is entitled to votes equal to 50.1 percent of total voting power on matters submitted to stockholders generally, including election of directors other than the Class T seats. Class F also has no economic rights. Class A, the stock the public can buy, gets one vote per share. Strategic partners hold Class N with no general vote. Employees get Class E for limited questions. The architecture is not a metaphor. It is a wiring diagram for insulating frontier AI decisions from the median mutual-fund holder.

What the market is really buying

Buyers of ANT are purchasing a claim on Anthropic''s cash flows and a smaller claim on its politics. That may be rational. Dual-class tech IPOs have trained investors to accept founder control in exchange for growth. Anthropic''s version adds a second non-economic sovereign, the trust, whose trustees are paid a fixed cash stipend that the filing says does not vary with financial performance. The company has already shown it will pause training when it decides safety requires it. Public markets hate pauses. The prospectus is an advance warning that the pause button stays wired to people who do not need the stock to clear a quarter.

The hard question is whether the trust is a conscience or a costume. A majority board elected by five trustees can protect a safety culture. It can also become a closed circle that ratifies founder preferences while citing humanity. Class F already hands the founders absolute control of the general vote. The trust''s majority seats matter most when founders and trustees disagree. The S-1 does not stage that fight in public. It stages the paperwork that makes the fight private.

Sonar has watched Anthropic''s ethics language collide with product choices before. The IPO does not resolve that collision. It capitalizes it. If the Long-Term Benefit Trust holds when a slower release costs revenue against OpenAI, the structure will have done the job the brochure describes. If the trust folds under competitive panic, Class A holders will learn they bought a story about governance rather than a lever. Either outcome will be measurable. The filing at least refuses to pretend the lever was ever theirs.