IPO prospectus: Anthropic reports a net loss of $42B in 2025, with operating losses of $8B+; revenue grew 12x to ~$4.6B, ~25% of which came from two customers

Anthropic is making a massive bet that AI will transform the global economy more profoundly than industrialization …

Reuters 2026-09-29 Echo Wang

Context & Ripple Effects

Anthropic’s filing puts its 2025 losses and customer concentration beside an already aggressive growth narrative: investor disclosures in May forecast its first operating profit, while September reporting described annualized-revenue expectations above $100 billion. The prospectus makes clear how much execution sits between those projections and the historical cost base.

The revenue profile is also entwined with distribution and infrastructure partners: Anthropic routed 47% of 2025 sales through Amazon and Google, paying distribution fees, while separately disclosing more than $518 billion of long-term AI-infrastructure commitments.

First-order effects

IPO investors must assess Anthropic’s valuation against a 2025 net loss of $42 billion and operating losses above $8 billion, rather than revenue growth alone.
With roughly a quarter of 2025 revenue coming from two customers, renewals and spending decisions by those buyers carry outsized weight for Anthropic’s near-term revenue base.

Second-order effects

Amazon and Google gain bargaining leverage as distribution partners after handling 47% of Anthropic’s 2025 sales, making partner fees and route-to-market economics material to the company’s margins.
The combination of large losses and largely non-cancelable infrastructure obligations makes converting revenue growth into compute utilization and durable gross margin a central test of Anthropic’s IPO case.

Third-order effects

If comparable AI labs seek public listings, investors will increasingly evaluate them as capital-intensive infrastructure businesses, with customer concentration, cloud commitments and distribution fees alongside model revenue.
The disclosures strengthen the distinction between headline AI revenue growth and the financing capacity required to sustain it, shifting scrutiny toward who bears long-term compute commitments.

The trend: AI labs are entering a public-capital cycle in which fast-growing software revenue is being weighed against infrastructure-heavy balance sheets and concentrated commercial dependencies.

Discussion

@andrewcurran_ Andrew Curran on x
Reuters has seen Anthropic's prospectus, and it shows they plan to spend more than half a trillion dollars on cloud, compute, and infrastructure in the coming year.
@ross__hendricks Ross Hendricks on x
Reuters just released a sneak peak of Anthropic financials, showing the company reported a net loss of $42 billion in 2025 - and this is before it started losing market share to dirt cheap open source models Anyone still wondering why the company is threatening to end humanity un…
@weakinstrument Ryan Cummings on x
Whatever example AI (equity!) bulls have in their head of a firm losing money before becoming profitable (Uber, Tesla, Amazon) that gives them hope, this is...not that. The labs are losing money *way* faster and at a much greater scale than anything we've seen before.
@edmundlee Edmund Lee on x
.@AnthropicAI is going to change the world, its IPO prospectus says ... it also recorded a net loss of $42 billion last year ... I can't recall a startup that ever saw such staggering losses: https://www.reuters.com/...
@trengriffin Tren Griffin on x
“We lose money on every token, but we make it up in volume.” https://www.reuters.com/...
@edzitron Ed Zitron on x
According to Reuters, a quarter of Anthropic's 2025 revenue came from *two customers*, and many of its largest clients are not locked into long-term contracts.
@teroterotero Tero Kuittinen on x
They will issue more debt in one year than entire junk bond issuance in North America in 2025? Even as bond markets are tanking? How does this work
@econcallum Callum Williams on x
If this data from @tickerplus is even broadly correct, isn't this really, really bad?
@zephyr_z9 @zephyr_z9 on x
Are they planning to price out everyone from the market
@kantrowitz Alex Kantrowitz on x
Anthropic's IPO will hinge on those who believe its ballooning losses are a path to domination vs. those who believe they're a path to ruin https://www.reuters.com/...
@jnthnvctr @jnthnvctr on x
“I could buy a trillion dollars of compute - actually it's 5 trillion, a trillion a year for five years.... And if my revenue isn't a trillion dollars, if it's even 800 billion dollars, there's no force on earth, there's no hedge that could stop me from going bankrupt” https://yo…
@tradfi @tradfi on x
* Anthropic's IPO prospectus shows sweeping AI vision, surging costs - RTRS * ANTHROPIC FY25 REVENUE $4.59 BLN, UP 1,088% Y/Y FROM $386 MLN IN FY24 - IPO PROSPECTUS SEEN BY REUTERS * ANTHROPIC FY25 GAAP NET LOSS EXPANDS TO $41.97 BLN VS $8.31 BLN IN FY24, PROSPECTUS SHOWS * ANTHR…
@stocksavvyshay Shay Boloor on x
ANTHROPIC JUST FILED FOR IPO The numbers are pretty wild since the growth is insane but so is the infrastructure bill: • Revenue: $4.59B (+1,088% YoY) • GAAP net loss: $41.97B • Compute spend: $7.3B (58% of total OpEx) • Cash: $20.3B
@jon_stokes Jon Stokes on x
I have been saying on here that metered inference is unprofitable for basic structural reasons (threads on this) & have been told that no Anthropic is wildly profitable. If this is true I am going to roll & smoke a massive “I told you so” & you are going to watch.
@ross__hendricks Ross Hendricks on x
Another hidden gem in the Reuters drop of Anthropic's financials... the company “plans to spend $518 billion on cloud, computing and infrastructure obligations in coming year, according to the prospectus.
@edzitron Ed Zitron on x
Bahahahaha Anthropic is a total dog of a company. Spent $12.6bn to make $4.6bn in revenue in 2025, $7.33bn of which was compute costs. Operating loss of $8bn. Losses getting worse. Weird that Reuters doesn't have the 2026 numbers from the prospectus https://www.reuters.com/...
@malwarejake Jake Williams on bluesky
Siri, is it good when huge chunks of my revenue come from only two companies? [embedded post]
@carnage4life Dare Obasanjo on bluesky
2025 numbers from Anthropic's IPO prospectus: — • Revenue: $4.6B, up 12x — • Total operating expenses: $12.65B — • Operating loss: $8.06B — • Cash + investments: $20.28B — • Future cloud obligations: $518B 🤯 — • Nearly 25% of revenue came from just 2 customers …
@robertscotthorton Scott Horton on bluesky
Here it comes: the Anthropic IPO. The biggest Ponzi scheme of this century, or any other. www.reuters.com/business/fin...
@jamespmcleod.ca James McLeod on bluesky
Seems like a bad business, on track to be a really big bad business. [embedded post]
@kevinhearne Kevin Hearne on bluesky
Again, investors should run away and this horrific atrocity needs to end, but preferably after they pay that settlement for stealing all my novels to train their plagiarism engine [embedded post]
@renrut-mas Sam Turner on bluesky
Take my pension, chatbitch. [embedded post]
@edzitron.com Ed Zitron on bluesky
Reuters got some of the IPO docs. Anthropic is a total dog of a company. Spent $12.6bn to make $4.6bn in revenue in 2025, $7.33bn of which was compute costs. Operating loss of $8bn. Losses getting worse year over year. Amazing stuff — www.reuters.com/business/fin... [imag…
@drgonzo123 Dennis Detwiller on bluesky
Hahaha. — That's not even a business. It's a really expensive hobby. [embedded post]
@crime-sprees @crime-sprees on bluesky
Claude is that good? [embedded post]
r/accelerate r on reddit
Anthropic's IPO filing: $4.6B revenue, $518B committed to compute, $2T target. To justify $518B on $4.6B of revenue, they need something big …
r/NVDA_Stock r on reddit
Reuters: Anthropic files for $2T IPO with $42B net loss in 2025, expects to spend half a trillion in 2027
r/artificial r on reddit
Anthropic files for $2T IPO with $42B net loss in 2025, expects to spend half a trillion more
r/singularity r on reddit
Reuters: Anthropic files for $2T IPO with $42B net loss in 2025, expects to spend half a trillion in 2027
r/technology r on reddit
Anthropic files for $2T IPO with $42B net loss in 2025, expects to spend half a trillion in 2027
r/MU_Stock r on reddit
BREAKING: ANTHROPIC TO SPEND $518B ON CLOUD, INFRASTRUCTURE IN 2027. ANTHROPIC JUST FILED FOR IPO.
@pwnallthethings @pwnallthethings on bluesky
wild that it is legal to structure a public company such that “a majority vote of the seven co-founders will direct a single share of Class F stock that amounts to 50.1% of the total voting power over key corporate matters” www.reuters.com/legal/transa...
@colinbowern.com Colin Bowern on bluesky
Common good for whom?
@bft.wtf Bennett Tomlin on bluesky
So if data is the new oil is Founder LLC the new Standard [embedded post]
@rdd147 Roger on x
Wooowwww my discovery of $1 Trillion of liabilities for Anthropic and $150 billion capital raise was WAAAAYYY off. They need to raise $600 billion in 2027 to not go bankrupt 😂🤣
@edzitron.com Ed Zitron on bluesky
So far the only retort from the AI boosters appears to be “2025 doesn't matter” and I'm not kidding [embedded post]
@davidcrespo @davidcrespo on bluesky
nothing really new or interesting in here, sadly. all the numbers are for 2025 and are dwarfed by everything that has happened since
@rowyourbot Ozma on bluesky
Lost $42 billion last year but worth $2 trillion in their IPO. OK sure! — Anthropic's IPO prospectus shows sweeping AI vision, surging costs - www.reuters.com/business/fin...
@swearyanthony @swearyanthony on bluesky
seriously, anyone putting stuff like pension money into this should be jailed. www.reuters.com/business/fin...
@amyhoy Amy Hoy on bluesky
indeed the numbers are bad — but THIS was my favorite bit about the anthropic s1 — www.reuters.com/business/fin... [embedded post]
@roycerk2 Royce Kurmelovs on bluesky
Forget about destroying humanity, AI might destroy Anthropic.
r/StockMarket r on reddit
Anthropic IPO Filing Reveals Explosive Growth and Massive Costs
@theangelremiel Ian Rennie on bluesky
It should not be underestimated how much money even the “successful” AI companies are losing. [embedded post]
@bruceandy Andy Bruce on bluesky
Anthropic is making a bet that AI will transform the global economy more profoundly than industrialization, electricity and the internet, according to its IPO prospectus seen by Reuters. — Anthropic reported a net loss of $42 billion in 2025, the prospectus said. — www.reuter…
@financedircfo Alastair Thomson on x
It's like nobody running an AI business knows a decent accountant. Businesses this bad in any other sector would have been bankrupt long ago. The IPOs exist solely to let a bunch of grifters cash out by raiding ordinary people's pensions and savings.
@david_moscrop David Moscrop on x
I'm not a business guy but companies aren't supposed to lose the equivalent of Iceland's GDP in a year right?
@carmguti Carmen on x
>Anthropic said nearly a quarter of its revenue came from two customers last year who are they?
@andimgladofit @andimgladofit on x
alright this convinced me. how long should i go on the ant ipo?
@laureloncapital @laureloncapital on x
Why dunk on Ant for 2025? Revenue was $4.6B on 100x growth. 2026 is the agentic breakout year and exit revenue is tracking ~15x that with Q4 still wide open. They might even turn a profit. First-party, auditable books plus more visibility into compute spend commitments is a net p…
@sanlsrni @sanlsrni on x
You're telling me 2 customers alone spent $1B+ on Anthropic products in 2025 I have many questions
@gc22gc @gc22gc on x
NO BAIL OUTS
@dowdedward Edward Dowd on x
These numbers only highlight why they need government regulation to eliminate their competition. No moat.
@karlykingsley Karly Kingsley on x
Sounds like Anthropic should cut out the avocado toast and get a second job. I hope they don't ask for any of that socialism to help them out of the irresponsible hole they put themselves in.
@garymarcus Gary Marcus on x
Anthropic's proposed valuation is easily calculated, as -50 times 2025 losses. The more they lose, the more they win!
@prefequitypeter Peter Pref on x
$42B loss in 2025 with an expected $2T IPO valuation
@rnaudbertrand Arnaud Bertrand on x
By the way that's probably why Anthropic is so worried about Chinese models: when you're the most expensive in the market and STILL spend $1.6 in compute for every dollar in revenue, you're in pretty bad shape for a price war.
@melatkirosco @melatkirosco on x
These companies are burning through cash to develop a technology they're designing to replace us and expect us to pick up the tab when their stocks crash because they still haven't figured out how to turn a profit. Say it with me: NO BAIL OUTS FOR BIG TECH!
@theserfstv @theserfstv on x
Is this good?
@great_martis @great_martis on x
What a nightmare. Name change: Loss-thropic Profits Optional.
@firstadopter Tae Kim on x
Narrator: 2026 numbers are much better
@ns123abc Nik on x
🚨 Anthropic IPO S-1 prospectus LEAKED: Valuation target: $2 TRILLION >$4.6 billion in revenue in 2025 >$8.06 billion in operating loss >$42 billion in net loss The prospectus warns that nearly 25% of revenue came from just TWO customers, and that many top enterprise clients aren'…
@zerohedge @zerohedge on x
Anthropic IPO prospectus leaked to Reuters Anthropic reported a net loss of $42 billion in 2025, and plans to spend $518 billion on cloud, computing and infrastructure obligations in coming year, according to the prospectus. The prospectus details how the company has grown sharpl…
@dariocpx JustDario on x
While I have been saying since ages ago OpenAI would never manage to IPO but Anthropic still had a chance (albeit not at a stupid valuation), after reading this I now think there is a meaningful chance neither Anthropic will managed to launch its IPO
@patricktoulme Patrick C Toulme on x
Hot take - there will be no money in selling coding models at some point in the single digit year future. Coding models will become commoditized and heavily subsidized by larger companies like Meta and SpaceX. Coding is inherently verifiable and how to RL for coding models is alr…
@edzitron Ed Zitron on x
Based on my own reporting on OpenAI's audited financials from 2025, it appears that Anthropic was a worse business (at least in that year), spending $2.75 make $1 versus OpenAI spending $2.60 to make $1. Could change in 2026! https://www.wheresyoured.at/ ...
@cameroncorduroy Cameron on x
oh shit here we go https://www.reuters.com/...
@jackfromohio Jack on x
IMO the IPO filing indicates Anthropic is at or near operating profit. $34M of expenses is one-time non-cash accounting nonsense. 2025 compute costs are 1.6x revenue. But revenue has 4x in 2026. Most of compute costs are training, which won't grow relative to inference revenue
@edzitron Ed Zitron on x
Also: if you have the S-1, ping me on signal at ezitron.76, I have so many questions
r/atrioc r on reddit
Anthropic's IPO prospectus shows $42 billion dollar net loss in 2025
@eastdakota Matthew Prince on x
This doesn't strike me as strange. 25% of @Cloudflare's S-1 was dedicated to Risk Factors. [embedded post]
r/ArtificialInteligence r on reddit
Anthropic warns AI may pose ‘existential risks to humanity’ in IPO filing - Reuters
Guglielmo Mengora Guglielmo Mengora on linkedin
Reuters obtained Anthropics IPO prospectus. Its not the $42 billion loss in 2025 — out of just $4.5 billion in total revenue — thats staggering. …
@lorak Lora Kolodny on bluesky
“Anthropic said nearly a quarter of its revenue came from two customers last year, and as part of its risk factors, warned that many of its largest clients were not locked into long-term contracts and could cut or stop spending.” www.reuters.com/business/fin...
@joshsternberg.com Josh Sternberg on bluesky
Oura postpones IPO citing “uncertainty in the market for first-time share sales” while Anthropic “plans to caution potential investors in its IPO that advanced AI could pose “catastrophic or existential risks to humanity”. — Late stage capitalism surrounds us. — www.reuters.c…
@jensfoell.de Dr. Jens Foell on bluesky
As a stark reminder of how much times have changed: In 2009, Hulu ran a Super Bowl ad featuring Alec Baldwin, explaining that their business model is an evil plan to destroy all humans, and everyone immediately got that it was a joke. — techcrunch.com/2026/09/28/a...
Echo Jing Wang Echo Jing Wang on linkedin
More on Anthropic from the confidential S-1 viewed by Reuters: — Anthropic leaders to control AI lab via ‘Founder LLC’ to promote public good over market forces - …
@edzitron.com Ed Zitron on bluesky
Per Reuters, Anthropic has $252 billion in non-cancelable compute obligations across Microsoft, Google and Amazon, and $161.2 billion in Broadcom TPU lease obligations that are “largely non-cancelable”. Truly insane. $413 billion in non-cancelable contracts. — www.reuters.com…
r/AMD_Stock r on reddit
Anthropic's $2T IPO is almost out, how does it affect AMD?
r/nottheonion r on reddit
Anthropic warns investors of AI's “existential risk to humanity” in IPO prospectus, reports say
@_nathancalvin Nathan Calvin on x
Matt Levine in his newsletter today correctly points out that there isn't actually much legal benefit …
r/singularity r on reddit
So Anthropic CEO Dario Amodei, who says he doesn't care about money, made over $18 million in total compensation in 2025, while his sister Daniela, who is the company's president, made $16.4 million.

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