Anthropic's loss hit $80.7 billion in six months. Take out one accounting line and it's about $9 billion.

Anthropic lost $80.7 billion in the first six months of 2026. A year earlier, same period, the loss was $13 billion.

That comes from a draft IPO prospectus, which Reuters says it reviewed and the Wall Street Journal reported first on October 20. I haven’t seen the document myself. Nobody outside the company and its bankers has, and Anthropic didn’t respond to requests for comment.

The $72 billion line

Of the $80.7 billion, $72 billion is an accounting charge. Anthropic has issued bonds that can convert into its shares, and as the company’s value rises, the estimated value of those bonds rises too. That increase is booked as a loss. No cash leaves.

Last year’s numbers worked the same way, and I took them apart in the earlier post on the $42 billion loss. Reuters notes the fair value of those notes tripled year over year.

Subtract the charge and you get roughly $8.7 billion. That’s my arithmetic, not a figure either outlet printed, so treat it as a rough guide. The reports I read don’t break out what else sits in the remaining loss.

What the business did

First half	2026	A year earlier
Revenue	$16.3 billion	$1.1 billion
Computing and infrastructure spend	nearly $9 billion	$2.3 billion
Net loss	$80.7 billion	$13 billion

Revenue went up about fifteen times. Compute spending went up about four. That’s the part that favors Anthropic. A company whose sales grew fifteen-fold while its biggest cost grew four-fold, and whose loss mostly comes from the market valuing it more highly, isn’t what I’d call in trouble, whatever the headline says.

But there’s a catch in the growth rate. Reuters reports Anthropic told investors on October 14 that third-quarter revenue hit $16.8 billion, up 45% from $11.6 billion in the second quarter. Revenue had more than doubled from the first quarter to the second. Some investors were disappointed that the pace slowed, Reuters says.

Why the valuation is moving

Four people told Reuters that investors at Anthropic’s investor day are weighing a valuation near $1.5 trillion, down from the roughly $2 trillion expected for the November sale. Reuters cautions that the plan and the dates could change.

Separately, the WSJ reported that Anthropic said it could spend up to $750 billion on computing capacity in coming years, including deals still under discussion. Reuters puts the firm commitments at at least $518 billion over a decade. That gap is a lot of money to leave vague.

Rough market. Reuters says other AI-related listings, including Switch, Nscale and SB Energy, have been delayed, and CoreWeave’s shares have sold off. Anthropic is now the only big tech name left on the fall IPO calendar. Marketing to investors is expected to start the week of November 9, and the prospectus could go public as early as late October.

My read

I think people will quote $80.7 billion for a week and then forget it, the same way they did with $42 billion. A bond revaluation is a poor measure of how a company is doing.

Numbers I’d watch are slower and duller. Does revenue growth keep falling from the 45% quarter? Does a $9 billion half-year compute bill grow faster than sales? And what does a public filing say about that $750 billion, once somebody outside can read it?

Related: Anthropic’s plan to put 5% of its shares into a public-interest fund and the $60 billion chip-debt story.

Sources

1. Al Jazeera, with Reuters: Anthropic posts $80bn loss in first half of 2026: WSJ, October 21, 2026
2. Reuters via The Manila Times: Anthropic first-half loss markedly higher at $80B, October 22, 2026
3. Reuters via MarketScreener: Anthropic IPO stands alone as AI market jitters sideline others, October 22, 2026