Anthropic's IPO Filing: Fast Growth, an $80 Billion 'Loss' and $498 Billion of Commitments

The week that investors turned on Big Tech’s AI spending is also the run-up to one of the largest stock offerings on record. Anthropic, the San Francisco company that makes the Claude AI models, filed its registration statement with the SEC on October 26. It plans to list on Nasdaq under the ticker ANT. Bloomberg has reported that marketing to investors could start as soon as the week of November 9, with Goldman Sachs and Morgan Stanley leading the deal.

No price range or share count has been set. Estimates of what the company will be worth vary widely. Anthropic’s last private round in May valued it at $965 billion. Reuters has cited a likely market value around $1.5 trillion, and other estimates run to about $2 trillion. Reports suggest the offering could raise $75 billion or more.

The prospectus is long. Four things in it matter most for understanding the business, and for the wider AI debate.

1. Revenue growth is extraordinary

Revenue for the first half of 2026 was about $16.3 billion, roughly fourteen times the $1.16 billion of the same period a year earlier. More than 11,900 customers paid Anthropic over $100,000 in the twelve months to September 30, up from about 950 a year before.

Growth at that speed and scale is almost without precedent for a company this size. It’s also the core of the investment case. The question for buyers isn’t whether demand exists, but how long growth like this can last and at what margin.

2. The $80 billion “loss” is mostly an accounting effect

The headline net loss for the half-year was $80.7 billion, a figure that has drawn plenty of attention. Read the line items and a different picture emerges. About $72.4 billion of it is a non-cash charge for changes in the fair value of convertible notes, derivatives and SAFEs. These are instruments early investors received that convert into shares later.

When a company’s valuation soars, the instruments that will become its shares become more valuable. Under accounting rules, that increase is recorded as a loss for the company, even though no cash leaves the business. Strip it out and the operating loss was much smaller, about $693 million. Analysts who also remove stock-based pay calculate a modest operating profit.

Cash tells a similar story. Operating cash flow was about $3.9 billion for the half-year, against capital spending of under $500 million. The company held about $131.7 billion in cash and short-term investments at the end of June, mostly from preferred-stock fundraising.

This is a useful general lesson: a GAAP net loss and a cash loss can be very different things. Our guide to reading an earnings report explains why cash flow is often the more telling number.

3. The real risk is in the commitments

Here is the part that connects directly to last week’s sell-off in Big Tech. Anthropic doesn’t spend much on data centres itself. It rents enormous amounts of computing capacity from others, including Amazon, Microsoft and SpaceX.

According to the filing, as analysed by Fortune, those agreements total about $657 billion. About $498 billion of that is non-cancellable: Anthropic must pay whether or not it uses the capacity. With most contracts running seven years or less, that implies fixed outlays on the order of $70 billion a year. That’s far more than today’s revenue, so growth has to continue at a steep pace to cover it.

Two implications follow:

• For Anthropic, the business carries large fixed costs that are hard to reduce. If revenue growth slowed sharply, profits could swing quickly, as Fortune put it, from “inspiring” to “a formula for disaster.” The filing also says Anthropic intends to expand its own data centre footprint, so commitments may grow.
• For the cloud giants, Anthropic’s commitments are part of what justifies their own spending. When Amazon or Microsoft builds data centres, contracts like these are the revenue on the other side. The health of AI labs like Anthropic and OpenAI is therefore tied to the cash-flow questions now hanging over the hyperscalers. Notably, OpenAI reportedly cut its latest fundraising target to $20 billion from $30 billion last week.

4. Public shareholders won’t control the company

Anthropic is a public benefit corporation, legally required to weigh a stated public mission alongside shareholder returns. Coverage of the filing describes a layered control structure. A special share held through a founders’ entity carries a majority of general voting power, and the votes of ordinary Class A shareholders are capped below 50%. A separate Long-Term Benefit Trust holds a class of stock that lets it elect a majority of the board. The company will be a “controlled company” under Nasdaq rules, which exempts it from some governance requirements.

The filing also allows additional shares to be issued to a philanthropic fund when the stock rises sharply above benchmark levels. That’s a potential source of dilution for public shareholders.

Structures like this aren’t unusual among founder-led tech companies, but this one is more elaborate than most. Investors buying ANT shares would be buying an economic stake with limited say over strategy, including decisions about AI safety that could affect profits.

What to watch

• The price range, expected when marketing begins. It will show whether bankers think public investors share the private-market valuation.
• Market conditions. A large IPO in a week of falling tech stocks could be delayed or priced conservatively. Demand for this deal will be a real-time read on investor appetite for AI.
• Index inclusion. A company of this size would eventually become a large weight in major indexes, meaning many index-fund holders would end up owning it whether they choose to or not.

For individual investors, the usual caution about hot IPOs applies. First-day pops tend to go to those allocated shares at the offer price, mostly large institutions. Buying in the opening days means paying whatever the market decides, often at a premium, before the company has reported a single quarter as a public company.