Anthropic's S-1: Reconstructed From the Record*

Anthropic confirmed Monday it submitted a confidential draft S-1 to the SEC — no share count, price range, or timeline set. The filing is sealed, but the public record around it is unusually deep, so today we reconstruct it: $4.8 billion in reported Q1 revenue and a reportedly projected first operating profit in Q2; a reported $1.25 billion-per-month xAI compute contract that surfaced in SpaceX's filing rather than Anthropic's; a $100 billion-plus AWS commitment; a reported ~$36 billion off-balance-sheet chip lease in syndication; and a governance structure — five financially disinterested trustees who ultimately elect a board majority — with no precedent at this scale. We lay out what's on the record and mark what only the filing can answer.

Deep Dive

On Monday, Anthropic confirmed it submitted a confidential draft registration statement to the SEC for a proposed IPO of its common stock. No share count, no price range, no listing venue, no timeline. The filing itself may stay sealed for months.

The financial record around it, though, is unusually public for a private company — built up through two company-announced megarounds, investor materials that reached the press, and one competitor's S-1 that disclosed Anthropic's largest known contract. In April we reconstructed SpaceX's S-1 from public data, seven weeks before the real one landed on EDGAR. Today we do the same for Anthropic: the public record, organized the way a filing would organize it, with the gaps marked.

A note on method before we start. Everything below is sourced to company announcements or public reporting. None of it is audited. Where sources conflict or definitions are loose, we say so.

*This is not an S-1, prospectus, research report, valuation opinion, or due diligence report. It is market commentary based solely on public reporting and company announcements.

The income statement, as reported

Anthropic posted $4.8 billion in revenue in the first quarter, according to figures shared with investors and first reported by The Wall Street Journal. For the second quarter, the company reportedly projected $10.9 billion in revenue and $559 million in operating profit — which would be its first profitable quarter. Anthropic itself cautioned investors that subsequent quarters may not remain profitable, given compute commitments coming due. As recently as last summer, the company had reportedly told investors not to expect full-year profitability before 2028.

The growth curve those numbers sit on: at the February Series G, the company said run-rate revenue was $14 billion. At the May Series H, it said run-rate revenue had crossed $47 billion. Run-rate is not a GAAP measure, and companies define it differently — usually annualized recent revenue, sometimes annualized recent bookings. Which definition Anthropic uses is one of the things an audited filing settles.

One comparison readers will reach for: The Information reported OpenAI's first-quarter revenue at roughly $5.7 billion with an operating margin around negative 122%. Set against Anthropic's reported Q1 and reportedly projected Q2, that may suggest different reported operating profiles, although the figures are unaudited, may not be comparable, and may use different definitions or accounting treatments

Reported private-company financials and secondary-market indications may be unaudited, incomplete, non-standard, or based on limited transaction activity. They should not be relied upon as fair value, executable pricing, or a basis for any investment decision.

The commitments page

This is the section of the eventual S-1 most likely to contain numbers nobody has seen assembled in one place. Three known obligations, from the public record:

The xAI contract. Disclosed not by Anthropic but by SpaceX, whose public S-1 revealed that Anthropic pays xAI $1.25 billion per month for exclusive access to the Colossus 1 facility in Memphis — more than 220,000 NVIDIA GPUs and 300 megawatts of capacity. The contract runs through May 2029, for a total reported value north of $40 billion. That is $15 billion a year, against a company-stated run rate of $47 billion.

The AWS commitment. In April, Anthropic committed to spend more than $100 billion on AWS over ten years, covering Trainium silicon and up to five gigawatts of capacity. The same agreement brought Amazon's investment to $5 billion immediately and up to $20 billion more tied to commercial milestones, per CNBC, on top of $8 billion previously invested.

The TPU lease financing. Apollo and Blackstone have been syndicating a roughly $36 billion debt deal in which a special-purpose vehicle buys Google's custom TPU chips and leases them to Anthropic for data centers reportedly sited in New York, Texas, Louisiana, and Indiana. The reported structure — about $6 billion of A1 notes, $25 billion of A2 notes, $4.5 billion of B notes — reported as intended to be off-balance-sheet, with Broadcom providing residual-value support on the senior tranches. Orders were reportedly due last week, with a close targeted for this week; as of Wednesday evening there is no public confirmation the deal has closed.

How these three obligations appear in the filing — as operating leases, purchase commitments, or contingencies — will determine what Anthropic's balance sheet actually communicates. The off-balance-sheet lease structure in particular is the kind of arrangement S-1 disclosure rules were built to surface.

Investors should not treat reported revenue, run-rate revenue, or projected operating profit as audited financial results, valuation support, or evidence of future profitability.

Capitalization and governance

The primary funding record is company-announced and clean: a Series F at a $183 billion valuation, a $30 billion Series G at $380 billion post-money in February, and a $65 billion Series H at $965 billion post-money in May — led by Altimeter, Dragoneer, Greenoaks, and Sequoia, with the round including $15 billion of previously committed hyperscaler capital and participation from Micron, Samsung, and SK hynix.

The strategic holders are the cap-table story. Amazon's cumulative commitment reaches up to $33 billion including milestone-gated tranches. Google's stake has been large enough that Fortune reported roughly half of both companies' recent AI profit gains came from marking up their Anthropic positions. The FTX estate's roughly 8% position — an artifact of a 2021 investment — was liquidated to institutional buyers in 2024 for a reported $884 million.

Governance is where Anthropic's filing may read like no other tech S-1. The company is a Delaware public benefit corporation, and its Long-Term Benefit Trust — five financially disinterested members — holds a special class of stock with board-election rights that grow over time, ultimately to a majority of the board. Most tech IPOs ask public buyers to accept founder supervoting shares. Anthropic's structure asks them to accept oversight by a trust whose mandate is explicitly not shareholder return. How the S-1 describes that arrangement, and what rights public holders get alongside it, is undisclosed.

What only the filing will answer

Cost of revenue, and where compute sits in it. Gross margin is the single number that most separates the bull and bear readings of every AI lab, and no audited version of Anthropic's has ever been public. Revenue mix across API, Claude Code, and enterprise contracts. Customer concentration, which Regulation S-K requires naming above 10% of revenue. The accounting treatment of the xAI and TPU arrangements. And the audited reconciliation — or distance — between the company's run-rate statements and GAAP revenue.

The limits of a reconstruction

Worth stating plainly: every financial figure above is unaudited, and the most consequential ones come from investor materials reported secondhand. Published skepticism exists — Ed Zitron has argued the reported operating-profit projection reflects favorable accounting around compute costs rather than a durable margin structure. We are not in a position to evaluate that claim, and neither is anyone else outside the company and its auditors. That is the point of the S-1. If the company proceeds to a public filing, the audited version replaces everything above. Until then, this is the record as it exists.

Reported private-company financials and secondary-market indications may be unaudited, incomplete, non-standard, or based on limited transaction activity. They should not be relied upon as fair value, executable pricing, or a basis for any investment decision.

📈 Data Point of the Day

Five

The number of members of Anthropic's Long-Term Benefit Trust — financially disinterested individuals who hold a special class of stock and whose authority to elect board members grows over time, ultimately to a majority. Whatever terms an offering may eventually carry, those five seats are a feature of the structure that has no precedent in a listing of this scale — and one prospective public holders would be evaluating alongside the financials.

🎓 Manual

Emerging Growth Company

A JOBS Act category that lets IPO issuers with under $1.235 billion in annual revenue file with scaled-down disclosure: fewer years of audited financials, lighter executive-compensation detail, and exemption from auditor attestation of internal controls. Anthropic's reported revenue is far past the threshold, so its S-1 would generally carry full disclosure obligations from the first public filing. Based on reported revenue, Anthropic may not qualify as an emerging growth company, though the final determination would depend on issuer-specific facts and applicable SEC rules

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