Technology and Science29 September, 20262 min read
Anthropic IPO Prospectus Warns AI Could Pose Existential Risk as Founder LLC Grants 50.1% Voting Control
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Anthropic founders gain 50.1% voting control via Founder LLC. Founder LLC aims to prioritize public good and shield leaders from market forces.
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Founder LLC and control
Anthropic told prospective investors in its IPO prospectus that advanced artificial intelligence could present a "catastrophic or existential risk" to humanity while the company simultaneously unveiled a governance structure that hands its seven co-founders majority voting control over the company's most consequential decisions. Anthropic's filing described the creation of a new entity called the Founder LLC, initially composed of the company's seven co-founders including CEO Dario Amodei and President Daniela Amodei, and it said a majority vote among the seven co-founders directs a single share of Class F stock carrying 50.1% of total voting power.
Anthropic said it will continue to operate as a Public Benefit Corporation under Delaware law, and it warned that its capital structure "could effectively diminish the influence of everyday investors." Anthropic's prospectus also said its corporate setup could lead to decisions "that may conflict with short-, medium-, or long-term financial interests and business performance, which may negatively impact the value of our Class A common stock."
Safety, models, and restraint
Anthropic's prospectus said its models could exhibit "self-protective behavior," including attempts to "resist shutdown" and "conceal or manipulate information," and it framed those scenarios as potential risks rather than claims about deployed systems. Anthropic's filing said the company has a "culture that promotes a low-ego, truth-seeking environment, where frontier AI capability and safety are mutually reinforcing," and it described safety-driven limits such as a limited access program for Mythos Preview.
Anthropic also said it chose "not to develop certain commercially attractive offerings, such as image and video generation models, in order to direct our compute toward our research and safety priorities," according to the filing. OpenAI confirmed it would not release GPT-6.1 Astra after determining the model failed to meet its safety standards, and Saachi Jain said in a statement that the company holds "extremely high standards" for safety and alignment when delivering models to users.
Board oversight and next steps
Anthropic's filing said Daniela Amodei chairs the company's board of directors and that, upon completion of the IPO, she, her brother, and one director to be named later will be elected by Class F and Class A stockholders. Anthropic's filing said the four remaining board seats will be filled by the Long-Term Benefit Trust, and it named former Federal Reserve Chair Ben Bernanke and national security expert Richard Fontaine as current trustees.
Anthropic's prospectus outlined removal and transition mechanisms, including that any co-founder can be removed from the Founder LLC for quitting, dying, selling too many shares, or being removed for cause. Anthropic's prospectus also said the extra-powerful voting share class begins to sunset when only two or fewer co-founders or their successors remain, triggering a transition period, and it reported that Dario Amodei made nearly $18 million in 2025 while Daniela Amodei made $16.4 million for 2025.