Anthropic Owes $518 Billion for Compute and Holds $20 Billion in Cash, Its Prospectus Shows

Anthropic has promised its computing suppliers $518 billion. It closed 2025 with about $20 billion in the bank. Both figures come from Anthropic's IPO prospectus, as Reuters reported on Sept. 28: $20.28 billion in cash, cash equivalents and short-term investments at Dec. 31, set against obligations for cloud, computing and infrastructure "in coming years" ¹. The same filing shows revenue of $4.59 billion in 2025, up from $386 million, beside an operating loss of $8.06 billion ³. Public investors could soon buy shares in the company behind Claude, while Akamai already spends its own capital on capacity Anthropic has agreed to rent.

Anthropic's closed funding rounds lift the capital reading 0.3 points

The move

The data5 rows · sources

Measure	Value
Reading before this day	1.8
This piece's move	+0.3 (Capital, reported)
Band for reported evidence	0.3 to 0.8
Reading after the day (with 4 other pieces that day)	1.7
Distance to 100	98.3

Who has actually read the Anthropic IPO prospectus?

Reuters has, and the rest of the world has read Reuters. On Sept. 29 the ledger searched EDGAR, the SEC's public filing system, for an Anthropic registration statement. The full-text index returned S-1 filings from SpaceX, Nscale and Oura that mention Anthropic, and the company lookup returned investment vehicles named for it. Anthropic, PBC, the operating company, has yet to appear as a registrant. That fits what Anthropic announced on June 1, when it said it "confidentially submitted a draft registration statement on Form S-1" for a proposed offering ⁴.

Why does that matter here? The ledger's method treats an SEC filing as confirmed evidence and a news review of one as reported evidence. Brian Sozzi, executive editor of Yahoo Finance, noted the filing's status on the night of Sept. 28: "An official filing has not been made public yet" ¹⁰. Every figure below therefore rests on Reuters' reading of a confidential document. Capital Brief carried the exact figures from that review, down to two customers at about 12 percent of revenue each ³.

Anthropic closed two rounds and filed in confidence; Reuters read the S-1

Timeline

The data8 rows · sources

Date	Event	Source
Dec. 31, 2025	Cash, equivalents and short-term investments stand at $20.28 billion	[1]
Feb. 12, 2026	Series G closes: $30 billion at a $380 billion valuation	[6]
May 5, 2026	Akamai and Anthropic master services agreement, dated May 5	[7]
May 28, 2026	Series H closes: $65 billion at a $965 billion valuation	[5]
June 1, 2026	Draft S-1 submitted to the SEC in confidence	[4]
Sept. 18, 2026	Akamai project plans commit $11.6 billion over seven years	[7]
Sept. 24, 2026	Akamai files its 8-K with the SEC	[7]
Sept. 28, 2026	Reuters reviews the prospectus: $518 billion in obligations	[1]

A $518 billion promise rests on $20 billion of cash

Start with the ratio. The obligations run to more than 25 dollars for every dollar Anthropic held at year end, by the ledger's arithmetic ¹. Spending in 2025 shows where the money goes: compute and infrastructure cost $7.33 billion, three times the 2024 figure and about 58 percent of $12.65 billion in operating expenses ¹³. The headline net loss of $41.97 billion includes a roughly $34 billion accounting charge on financing that could turn into shares ¹³. Operating results leave that charge out, and they carry the figure a buyer of the stock would watch: a loss of $8.06 billion, widened from $2.98 billion ³.

Revenue is concentrated, too. Two customers supplied nearly a quarter of it ¹. In Reuters' summary of the risk factors, many of the largest clients "were not locked into long-term contracts and could cut or stop spending" ¹.

What does one slice of the $518 billion look like on paper? Akamai's filing with the SEC shows one. The 8-K states: "Subject to any termination described below and satisfaction of certain delivery and service availability requirements, Anthropic has committed to pay the Company approximately $11.6 billion in the aggregate under the Project Plans" ⁷. Akamai expects to spend about $5.5 billion of its own capital to build that capacity ⁷. Its executives told investors revenue from the deal starts in the second half of 2027 ⁸. Anthropic may also end each project plan "upon notice of a material outage, subject to certain conditions," according to Akamai's filing ⁷. Akamai's slice, then, is a contract for servers the supplier has yet to rack, paid for as they arrive.

Bret Taylor, OpenAI's chair, gave the gap one sentence on a McKinsey podcast on Sept. 24: "The obvious challenge is that the pace of AI is measured in days, but building out a data center—the power, the real estate, all of it—takes so much longer" ¹². Here is a frame to reuse on every lab's filing. Labs sign promises in days; suppliers deliver capacity in years.

Anthropic owes more than $25 for every $1 it held at year end

The number

The data1 row · sources

Unit: dollars of obligations per dollar of cash

Measure	Value	Source
Obligations of $518 billion against $20.28 billion in year-end cash, by the ledger's arithmetic	25.5 dollars of obligations per dollar of cash	[1]

Closed money counts first

Three numbers separate money in hand from money promised: the year-end cash, the February round and the May round. Anthropic raised $30 billion at a $380 billion valuation on Feb. 12 ⁶. On May 28 it raised $65 billion more at $965 billion, a round that "includes $15 billion of previously committed investments from hyperscalers, including $5 billion from Amazon" ⁵. Krishna Rao, Anthropic's chief financial officer, set out what the money buys: "This funding will help us serve the historic demand we are experiencing, stay at the research frontier, and bring Claude to more of the places where work happens" ⁵.

Add both rounds to the year-end cash and the closed money reaches about $115 billion. That sum is the ledger's arithmetic and an upper bound, since 2026's bills draw on it. Both rounds also fold in money announced or committed earlier: part of Microsoft's and Nvidia's stakes in February, and $15 billion from hyperscalers in May ⁶⁵. It covers a little over a fifth of the obligations.

Revenue is meant to pay part of the rest. Anthropic put its run-rate revenue at $14 billion in February and above $47 billion in May ⁶⁵. Fortune relayed a Wall Street Journal report that second-quarter 2026 revenue would reach $10.9 billion with the company's first operating profit ¹¹. The Series H page also names the likely large pieces of the $518 billion: agreements with Amazon for up to five gigawatts, with Google and Broadcom for five gigawatts of TPU capacity, and with SpaceX for GPU capacity in Colossus 1 and Colossus 2 ⁵. Reuters left the breakdown unreported, so that match is an inference from Anthropic's own list.

Anthropic's $115 billion in hand covers a fifth of $518 billion owed

Compared

The data7 rows · sources

Unit: USD billions

Item	Value	Source
Obligations, per Reuters' review	518	[1]
Closed money, upper bound ledger's arithmetic	115	[1] [5] [6]
Series H, May 2026	65	[5]
Series G, February 2026	30	[6]
Cash at Dec. 31, 2025	20.28	[1]
Akamai commitment, seven years	11.6	[7]
Compute and infrastructure spend, 2025	7.33	[3]

Hendricks and Zitron read the same numbers

Ross Hendricks, an equity analyst who writes the Ross Report, went straight at the funding question in an X post that Stocktwits reproduced: "Just a casual mention of raising half a trillion in a single year, really? Does anyone believe this? Let's say they pull $100B in equity from the IPO... and then what, $400B from the debt markets?" ⁹. Ed Zitron, chief executive of EZ Primary Research, aimed at the loss: "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" ⁹.

Hendricks reads the figure as a single year's bill, where Reuters wrote "in coming years" ¹. That correction changes the pace and leaves the gap. Reuters left the schedule unreported, so the ledger assumes one for scale. Spread over seven years, the term of the Akamai contract, $518 billion comes to about $74 billion a year. That is more than three times the year-end cash and ten times the 2025 compute bill.

Sozzi named who else carries the risk: "If Anthropic doesn't deliver on its grand vision, it could put a lot of other companies at major financial risk — from a stock and a bond perspective" ¹⁰. Akamai's $5.5 billion build is one such company's exposure, stated in the release attached to its 8-K ⁷. Eric Kutcher, McKinsey's North America chair, put the arithmetic for the whole buildout plainly while declining to take a side: "If you take a system-level view of the capital we're putting in the ground and ask whether we're seeing the operating cash flow to justify it—it doesn't close today" ¹².

Evan Schlossman of Neostellar Capital told Fortune in August that compute would be his second check on Anthropic's S-1, right after its revenue definitions: "Do they own that? Are they leasing it? Is it short-term leases? Is it long-term leases?" ¹¹. Reuters' account answers part of it. Obligations owed to cloud and infrastructure providers read as long rental contracts with companies that build first and bill later, an inference from how the figure is described. The skeptics' case moves the weight from the obligations to the financing, which is where the method already puts it.

Krishna Rao cites demand; Ross Hendricks asks where $518 billion comes from

Both sides

The data2 rows · sources

Side	Who	Claim	Source
For	Krishna Rao	The Series H money lets Anthropic serve historic demand, stay at the research frontier and bring Claude to more places where work happens.	[5]
Against	Ross Hendricks	Half a trillion strains belief: even $100 billion of IPO equity would leave about $400 billion to raise in the debt markets.	[9]

Anthropic's 80 pages of risk factors tie safety to spending

Roughly 80 of the prospectus's 261 main-body pages cover risk factors, against 48 for the business itself; SpaceX gave about 38 of 277 ². The filing lists "self-preserving behaviours," including attempts to "resist shutdown" and to "conceal or manipulate information" ². Anthropic also wrote, as Reuters quoted it: "Potential model awareness of our evaluation efforts creates a significant limitation on our ability to assess model safety" ². A second line ties risk to growth: "Our development of highly advanced models, platforms, and applications and expansion of use cases could further increase the risk that our models cause harm" ².

Those sentences sit in a capital document for a reason. Anthropic called its safety work "resource-intensive" and said it must divide limited funds among computing power, AI talent and safety, per Reuters ². It also said a "continuous and overlapping cadence" of releases is "inherent to remaining at the frontier of AI development" ². Read as finance, new models drive revenue, and revenue services the compute contracts. Dario Amodei called for pacing the frontier in September ²; the filing describes a business that earns by keeping pace.

Capital moves up 0.3, at the bottom of the band

The capital component asks one question: is committed, closed financing paying for the buildout, or only announced? Anthropic's prospectus answers with two different kinds of number. Closed money is real: $95 billion raised in 2026 sits on Anthropic's own pages, and $20.28 billion of year-end cash sits in its prospectus as Reuters read it ⁵⁶¹. Obligations of $518 billion are promises, and one of them, Akamai's, already has a supplier spending its own capital ⁷.

Up by 0.3, then, in capital, at reported confidence. Reported, because the S-1 remains confidential and every prospectus figure comes through Reuters. The bottom of the band, because capital shares the smallest weight of the eight components, 0.05, with governance, and because the largest number in the story is a promise. A priced offering with settled proceeds would count as closed financing at scale, confirmed evidence that earns the larger steps of the confirmed band.

Public investors and suppliers carry the risk. Investors would buy into Anthropic, which owes $518 billion and held $20.28 billion, and Akamai is spending $5.5 billion of its own capital on racks that Anthropic pays for over seven years. The open question decides the next move: does the offering close at a size that turns promises into paid capacity?

Which figures stand on a filing, and which rest on Reuters' reading

The record

The data9 rows · sources

Column	Item	Source
Closed or filed	Series G: $30 billion raised at $380 billion, Feb. 12, 2026	[6]
Closed or filed	Series H: $65 billion raised at $965 billion, May 28, 2026	[5]
Closed or filed	Draft S-1 submitted to the SEC in confidence, June 1	[4]
Closed or filed	Akamai 8-K: $11.6 billion commitment, terminable on a material outage	[7]
Promised or reported	$518 billion in cloud, compute and infrastructure obligations	[1]
Promised or reported	$20.28 billion in cash at Dec. 31, 2025, per Reuters	[1]
Promised or reported	Operating loss of $8.06 billion in 2025	[3]
Promised or reported	Up to $9 billion more with Akamai, about $20 billion in all	[7]
Promised or reported	Akamai revenue from the deal begins in the second half of 2027	[8]

By the numbers

• $518 billion in future cloud, compute and infrastructure obligations, per Reuters' review ¹
• Cash, cash equivalents and short-term investments of $20.28 billion at Dec. 31, 2025 ¹
• Revenue of $4.59 billion in 2025, up from $386 million in 2024 ³
• Operating loss of $8.06 billion, widened from $2.98 billion ³
• Compute and infrastructure spending of $7.33 billion, about 58 percent of operating expenses ³
• Two customers at about 12 percent of revenue each ³
• Roughly 80 of 261 main-body pages on risk factors ²
• Series H of $65 billion at a $965 billion post-money valuation, closed May 28 ⁵

What to watch

A public S-1 on EDGAR would let the ledger read the obligations schedule itself, by year and by counterparty where the filing names them, and would lift this evidence from reported to confirmed. Priced shares and settled proceeds count as closed financing, confirmed evidence that moves capital by a larger step. Akamai's quarterly report for the period ending Sept. 30 will attach the full master services agreement ⁷, an Anthropic compute contract a reader can check clause by clause. A renegotiated obligation, a listing delayed well past the midterms, or a supplier's termination notice would argue for the reverse move.