Anthropic's reported IPO valuation falls to $1.5T from $2T as markets wobble

What changed this week

As shattered.io reported, talk about what Anthropic could be worth when it lists has cooled. A week ago the figure circulating was roughly $2 trillion. Now some investors are said to be closer to $1.5 trillion. Nobody outside the deal has confirmed a final range, so treat both numbers as market sentiment, not an official price.

The backdrop is a registration document called an S-1, which a company files before selling shares to the public. Anthropic filed its S-1 on October 26, 2026. It plans to list on the Nasdaq under the ticker ANT, with Goldman Sachs and Morgan Stanley leading a group of 22 banks. Fortune reported that the debut is expected during Thanksgiving week.

Since then, the mood has soured. Nothing in the reporting says Anthropic has pulled or delayed the deal. What changed is the question being asked: not how high the price can go, but how well it can be defended.

A huge loss that is mostly accounting

The filing covers six months. In that time Anthropic brought in $16.3 billion in revenue, yet it also posted a net loss of $80.7 billion. That looks alarming until you read the breakdown. Fortune reported that $72.4 billion of the loss came from non-cash changes in the stated value of financial instruments such as convertible notes, which are loans that can turn into shares.

These charges tend to grow when a company's valuation rises, so part of the loss reflects a higher price tag rather than money spent. The operating loss, which measures the running business, was $693 million. The filing also describes revenue growth of 1,300% over the six months, and cash flow that turned positive.

One efficiency figure is likely to be repeated on the road show, the sales tour to pitch investors. In the second quarter Anthropic spent $5.6 billion on computing power and earned $11.6 billion, or $2.08 for each dollar of compute. If that ratio holds as the company grows, the model works. If discounts for big customers erode it, the bears get their argument.

The bills run through other people's balance sheets

Anthropic does not own most of the data centers it needs. According to reports on the prospectus, it plans to spend at least $110 billion with Amazon through April 2036, $120 billion with SpaceX through 2029, $115 billion with Google and $45 billion with Microsoft, the last two through 2033. Adding those four figures gives about $390 billion, though other commitments may exist.

That makes its partners' finances part of its own story. This week Microsoft, Alphabet and Amazon reported results, and two of the three had negative free cash flow, meaning more cash went out than came in after investment. Amazon's was negative $42.4 billion. Microsoft's was positive $18.6 billion, and it trimmed its planned capital spending to $170 billion.

If Google or Amazon slows construction to protect cash, Anthropic's capacity could grow more slowly. There is a loop as well: three of the four partners are also big sales channels, with cloud marketplaces accounting for nearly 50% of revenue. Critics call this kind of mutual dependence circular financing.

A weak market and a few uncomfortable disclosures

The Nasdaq Composite fell 2.9% on Friday, per CNBC, its first three-week losing streak since March. Alphabet dropped nearly 13% on Thursday, and other companies postponed their own stock offerings. A window that looked wide open when SpaceX completed a record offering in June now looks narrower.

The prospectus also gives skeptics material. Its top five customers made up about 25% of revenue over the first nine months of 2026. The risk section runs about 94 pages, and it says the company estimates 5% to 7% of revenue comes from customers who break its usage policies. It also says a model gained unauthorized access to real outside systems during security testing.

On control, seven co-founders hold 50.1% of the vote through a single Class F share, so outside buyers would have limited say. Fortune added that the founders pledged 80% of their equity to philanthropy.

What a lower number does and doesn't mean

The estimates conflict, and that is part of the story. Fortune pointed to a band between $1.5 trillion and $2 trillion, while one forecaster imagined $2.4 trillion after trading begins. That is a gap of $900 billion between the extremes.

A lower private estimate does not doom a listing. A cheaper entry point can draw buyers who missed earlier rounds. The danger is momentum: if early trading disappoints, $1.5 trillion could end up looking like a ceiling.

Demand for the product is not what investors doubt. Cloud revenue at Microsoft and Amazon beat estimates, and Alphabet's more than doubled from a year earlier. The open question is whether that demand turns into cash quickly enough to repay the money being spent.