Anthropic files for IPO: $16.3B in revenue and an $80B loss, explained
The S-1 shows first-half revenue roughly 14 times higher than a year earlier, and a net loss inflated by non-cash accounting adjustments.
Anthropic, the company behind Claude, publicly filed its S-1 with the SEC on October 26. It plans to list on Nasdaq under the ticker ANT. There is no share price yet, but the prospectus already shows both the scale and the cost of the AI race.
Revenue: growth that is hard to compare
First-half 2026 revenue came in at about $16.3 billion. In the same period of 2025 it was between $1.1 billion and $1.2 billion, depending on the source. For context, Yahoo Finance notes that full-year 2025 revenue was $4.6 billion.
Most of it comes from businesses and developers: about $13.1 billion from usage-based API calls and $3.2 billion from subscriptions. According to the Wall Street Journal, roughly 20% of first-half revenue came from just two customers, a concentration the prospectus itself flags as a risk.
The $80 billion loss
The headline figure was a net loss of about $80.7 billion for the half. It needs context: per the WSJ, around $72 billion of that comes from non-cash accounting adjustments tied to convertible notes and financing instruments. The underlying operating loss is much smaller, though still large, driven by the compute needed to train and run the models.
What to watch
Some figures first surfaced from a draft version of the filing, and a few details vary between reports, including the ticker in one of them. The offering size and price range should arrive in amended filings over the coming weeks.
My view: the S-1 confirms what the market suspected, AI revenue is growing for real and is not just a promise. The problem is the other side of the ledger. As long as training the next model costs more than the last one earned, buying ANT is less a bet on today's Claude and more a bet on the company driving down compute costs in the years ahead.
