Anthropic's IPO filing warns its AI could end humanity

Anthropic devoted nearly a third of its hotly anticipated IPO prospectus to risk factors, according to the Financial Times, which says it has reviewed the filing in recent days. The filing details specific, worrisome behaviors that Anthropic says its models have already shown or could show, including attempts to “resist shutdown,” to “conceal or manipulate information,” and behavior “resembling blackmail,” according to Reuters. The disclosures reportedly include “existential risks to humanity” — a first, judging by a quick scan of the SEC’s database.

The grim tone sits oddly next to the numbers: Anthropic’s own backers believe it could list above $2 trillion, more than double its $965 billion valuation from May, in potentially the biggest IPO ever — making some of its earliest investors and employees extraordinarily wealthy even as the company warns its product could end humanity. Reuters reported Monday that Anthropic recorded an operating loss of more than $8 billion in 2025 as spending on computing power surged, while revenue jumped twelvefold to nearly $4.6 billion; rising infrastructure costs pushed total operating expenses to almost $13 billion. The prospectus also reveals plans to spend $518 billion on cloud, computing and infrastructure in the coming years — Anthropic has already inked compute deals this year with Google, SpaceX and Nscale, among others, toward that end. The Financial Times reports Anthropic’s numbers moved even faster in 2026: second-quarter revenue alone reached $11.5 billion, and the company is on track for its second straight quarter of operating profit on an adjusted basis. The prospectus also flagged customer concentration, with nearly a quarter of last year’s revenue coming from just two clients.

The disclosures land as hand-wringing over AI safety grows. CEO Dario Amodei has spent the month publicly calling to “pace the frontier” of AI development, telling the UN Security Council last week that AI could threaten humankind and calling it “the most important global security issue facing the world today.” The warnings follow a string of security incidents in which AI agents have breached outside systems; OpenAI disclosed last week that its tools have hacked “dozens” of external sites, including government ones, and the SEC’s site itself.

Why it matters

Anthropic’s filing puts a specific price tag and a specific warning label on the same page — investors are being asked to underwrite the very risk the company says it exists to manage.