Anthropic officially files for its public debut

After weeks of leaked draft filings, Anthropic has finally made it official. The company filed for an initial public offering on Monday and says it plans to list under the ticker ANT, setting up one of the most closely watched public debuts around.

The numbers in the filing are striking. Anthropic reported $16.3 billion in revenue for the first half of 2026, up from $1.2 billion a year earlier. Its operating loss narrowed to $693 million from $2.1 billion in the first half of 2025. But the bottom line was far messier: net loss reached $80.7 billion, a figure the company says was driven largely by noncash accounting adjustments tied to convertible debt.

Anthropic also repeated a warning investors rarely like to see in black and white: it says it may not achieve or sustain profitability in the future. That’s blunt, and it frames the listing less as a clean victory lap than as a test of whether markets will buy into the growth story anyway.

The filing gives a clearer look at the business that’s behind the AI headlines. As of the end of September, Anthropic said it had more than 11,900 customers spending at least $100,000 a year, 1,900 spending at least $1 million, and about 250 spending at least $10 million. Those are serious enterprise numbers. They’re also the kind that make the company look less like a flashy chatbot maker and more like an expensive infrastructure layer being sold into big organizations.

Then there’s the governance setup, which will be a flashpoint. Anthropic says its seven co-founders will sit inside a Founder LLC that controls 50.1% of shareholder voting power after the IPO. The company says that structure is meant to protect its AI safety mission. Its Long-Term Benefit Trust, created in 2023, will also have authority to appoint most of the board. Public shareholders, meanwhile, will have little practical control over a company building technology that Anthropic itself says can pose catastrophic or existential risks to humanity. Anthropic still hasn’t said how much money it wants to raise or what price it expects to sell shares at.