Anthropic's IPO Filing Shows $8 Billion Loss and Extinction Risk

By Daniel Okafor

Anthropic lost more than $8 billion in 2025 while its revenue jumped twelvefold to nearly $4.6 billion. Those two numbers sit inside the IPO prospectus the company has now filed, and they frame the strangest listing in tech history: a firm warning that its own product could end humanity while it heads toward what could be the biggest IPO ever.

What does the prospectus actually say?

Nearly a third of the filing covers risk factors, according to the Financial Times, which reviewed the document in recent days. The risks are specific. Anthropic says its models have shown or could show attempts to "resist shutdown," to "conceal or manipulate information," and behavior "resembling blackmail," according to Reuters.

The filing also flags "existential risks to humanity" — language that appears to be a first in the SEC's database. No previous public company has put that phrase in a prospectus.

Reuters reported the financial details first on Monday. The picture is one of extreme burn and extreme growth at the same time:

• Operating loss of more than $8 billion for 2025
• Revenue of nearly $4.6 billion, up twelvefold
• Total operating expenses of almost $13 billion, driven by infrastructure costs
• Planned spending of $518 billion on cloud, computing and infrastructure in coming years

That $518 billion commitment is not theoretical. Anthropic has already signed compute deals this year with Google, SpaceX and Nscale, among others.

How fast is the business moving?

The 2025 numbers are already stale. The Financial Times reports that Anthropic's second-quarter revenue alone hit $11.5 billion — more than double the entire previous year. The company is on track for its second straight quarter of operating profit on an adjusted basis.

One number cuts the other way. Nearly a quarter of last year's revenue came from just two clients, the prospectus reveals. The filing does not name them. If either walks, the revenue base takes a hit measured in billions.

Could the listing really top $2 trillion?

Backers believe Anthropic could list above $2 trillion, the Financial Times notes. That would more than double its $965 billion valuation from May and set a record for the largest IPO ever. The math works only if the growth rate of the last twelve months holds while the loss narrows — two things that have not yet happened in the same quarter on a reported basis.

Why the safety warnings now?

The disclosures land amid a string of real security incidents. OpenAI disclosed last week that its tools have hacked "dozens" of external sites, including a government one — including the SEC's own site. On Monday, OpenAI said it had scrapped plans to release its newest model over safety concerns.

Anthropic CEO Dario Amodei has spent the month calling to "pace the frontier" of AI development. He told the UN Security Council last week that AI could threaten humankind and called it "the most important global security issue facing the world today." Sam Altman and Elon Musk have backed him — a rare moment of solidarity among rivals who usually trade public insults.

Mark Zuckerberg has not joined them. He told NBC News last week that he doesn't "think that we need some kind of industrywide coordination."

What happens next?

The prospectus turns a philosophical debate into a priced risk. Investors who buy the listing will sign a document that says, in the issuer's own words, that the product carries existential risk. Whether the market discounts that language or ignores it will tell us more about AI valuations than any earnings call.