Anthropic S-1 Filing: Revenue, Losses, and IPO Leaks

The question doesn’t name the issuer. I’ll identify which S-1 had a September 2026 draft and a later public filing, then compare the filing to that draft and to major press accounts.
This is Anthropic’s IPO. Next I’ll locate the public S-1 and the September draft numbers the press has been using.
Social posts this afternoon say the prospectus is now public. I’m pulling that filing and the write-ups against the September draft.
Anthropic’s public S-1 is on EDGAR as of this morning. The load-bearing 2024–H1 2026 figures match the leaked drafts. The valuation, the raise, third-quarter results, and “adjusted profit” do not appear as priced or audited facts in the filing.

The registration statement is Anthropic, PBC, Form S-1, CIK 0002130357, accession 0001628280-26-067168, accepted October 26, 2026 at 09:00. Proposed Nasdaq ticker is ANT. Goldman Sachs and Morgan Stanley are named. Share count, price range, and proceeds are blank. The September “draft” was never a public filing: Reuters (September 28–30) and the FT (September 29) reviewed a confidential prospectus covering 2024–2025. A later confidential draft, viewed by the Wall Street Journal and Reuters on October 20, added first-half 2026. Today’s document confirms those half-year numbers and leaves the offering economics and the third quarter blank.

What actually changed

The mechanism that matters is not the $80.7 billion headline loss. Compute and infrastructure fell from 160% of 2025 revenue to 55% of first-half 2026 revenue, so the GAAP operating loss collapsed from $8.06 billion on $4.59 billion of 2025 sales to $693 million on $16.29 billion of first-half sales. Cash, meanwhile, went from the $20.28 billion the September draft showed at December 31, 2025, to $112.4 billion of cash and equivalents plus $19.3 billion of short-term investments at June 30, 2026, after $141.1 billion raised in total. The IPO is not a rescue financing. The bear case is whether locked compute, still mostly outside the summary totals (the aggregate commitment line is blank), can outrun a usage-based book that is still concentrated and still GAAP-unprofitable for the half.

Three-column comparison

Figures in the filing column are taken from the S-1 income-statement summary and prospectus text, in millions where the table is labeled that way. Press figures are as those outlets printed them. “September draft” means the confidential prospectus Reuters and the FT described on September 28–30, 2026, not a document on EDGAR.

Item	Public S-1 (filed Oct. 26, 2026)	What press has claimed	Change vs. September draft
Filing status	Public S-1, file no. 333-299633. Price, share count, and proceeds blank. Goldman Sachs & Co. LLC and Morgan Stanley named.	Yahoo/IFR: public file around Oct. 23–26; roadshow week of Nov. 9; raise up to $100 billion. Reuters: some investors discussing ~$1.5 trillion vs. a $2 trillion hope.	September Reuters said a public file by end-September and a mid-October roadshow had already slipped. Price was never set. The $100 billion / $1.5–2 trillion figures were never in a filing.
2024 revenue	$386 million	Reuters, Sept. 28: 12-fold growth implies roughly that base. Secondary write-ups sometimes said “about $400 million.”	Confirmed. The “~$400 million” versions were rounding.
2025 revenue	$4,585 million	Reuters, Sept. 28: “nearly $4.6 billion,” 12-fold. NYT DealBook, Sept. 29, repeated Reuters.	Unchanged in substance. Exact figure is $4.585 billion, not $4.6 billion.
H1 2025 revenue	$1,163 million	WSJ/Reuters, Oct. 20: “$1.1 billion.” Some Oct. 26 social posts said $1.2 billion.	Not in the September Reuters package, which stopped at full-year 2025. Now on the face of the statements.
H1 2026 revenue	$16,286 million	WSJ, Oct. 20, and Reuters the same day: $16.3 billion. Yahoo, Oct. 26: $16.3 billion, more than all of 2025.	New versus the September draft. Public number matches the October leak.
Q3 2026 revenue	The sentence that would state three months ended Sept. 30, 2026 is blank (“to $”). Financial statements in the summary run through June 30.	Bloomberg, Oct. 14–15: company told investors Q3 revenue was $16.8 billion, up 45% from Q2, and adjusted-profitable. Reuters, Oct. 20, repeated the investor-day figure. Q2 has been reported as $11.5 billion or $11.6 billion depending on the outlet.	Not in the September draft and not filled in the public S-1. Press-only. Do not treat $16.8 billion as a filed number.
2025 operating loss	$8,060 million	Reuters, Sept. 28: widened to $8.06 billion from $2.98 billion in 2024.	Confirmed. 2024 operating loss in the filing is $(2,980) million.
H1 2026 operating loss	$693 million. Total operating expenses $16,979 million on $16,286 million of revenue.	Oct. 20 WSJ/Reuters coverage led with the net loss and “nearly $9 billion” of compute, not this operating line. Yahoo, Oct. 26: operating loss $693 million. An Oct. 26 social post claimed $974 million of Q2 GAAP operating income on $11.56 billion of revenue.	Not reported in the September package. The half-year operating loss is now public. The quarterly $974 million figure did not appear in the S-1 text retrieved today and should be treated as unverified.
2025 net loss	$41,965 million, of which $(34,308) million is change in fair value of convertible notes, derivatives, and SAFEs.	Reuters, Sept. 28: net loss of $42 billion, roughly $34 billion a non-cash financing charge.	Confirmed, with tighter figures.
H1 2026 net loss	$80,748 million, of which $(72,388) million is the same fair-value line. H1 2025 net loss was $12,969 million.	WSJ headline, Oct. 20: $80.7 billion net loss. Reuters, Oct. 20: $72 billion of that was an accounting charge on bonds that can convert into shares; prior-year half loss “$13 billion.” Yahoo, Oct. 26: $72.4 billion non-cash charge.	New versus September. Public filing matches the October leak and is slightly more precise than “about $72 billion.”
Compute and infrastructure	2024: $2,522 million. 2025: $7,326 million. H1 2025: $2,334 million. H1 2026: $8,945 million. Prospectus says June-quarter revenue grew 1,368% year over year while compute expense grew 300%.	Reuters, Sept. 28: $7.33 billion in 2025. WSJ, Oct. 20: nearly $9 billion in the first half, vs. $2.3 billion a year earlier and $7.3 billion in all of 2025.	2025 figure confirmed. Half-year spend is new versus September and matches the October draft.
Cash	At June 30, 2026: cash and equivalents $112.4 billion and short-term investments $19.3 billion. Balance-sheet line “cash, cash equivalents, and short-term investments” $131,651 million. Capital raised in aggregate: $141.1 billion.	September Reuters: $20.28 billion at Dec. 31, 2025. Oct. 26 social posts: “$112 billion in cash.”	The December 2025 figure is stale. The $112 billion posts omit $19.3 billion of short-term investments.
Customer concentration	Risk factor: a substantial portion of revenue and receivables comes from a limited number of customers. Summary does not, in the text retrieved, restate the percentages. Enterprise counts as of Sept. 30, 2026: more than 11,900 customers at $100,000+ TTM revenue; more than 1,900 at $1 million+; about 250 at $10 million+. Net revenue retention about 900%.	Reuters, Sept. 29: two unnamed customers each 12% of 2025 revenue; 47% of 2025 sales ($2.16 billion) through Amazon and Google marketplaces; Reuters calculated about $351 million of distribution fees. FT, Sept. 29: close to a quarter of last year’s revenue from two clients. WSJ, Oct. 20: about one-fifth of H1 2026 revenue from two customers. Yahoo, Oct. 26: one-fifth from two customers, “the remainder” from “a small handful.” Motley Fool, Oct. 21: named the two as SpaceX and Microsoft.	The 12% / 47% / $2.16 billion / $351 million figures are September-draft reports, not re-extracted from today’s HTML. The one-fifth H1 claim moved from the October leak into today’s Yahoo readout; the “small handful” gloss is the outlet’s, not a sentence confirmed here. Naming SpaceX and Microsoft is unverified.
Compute commitments	Summary says purchase commitments and leases with aggregate committed spend of “more than $” — the total is blank — “substantially all” related to compute, with a blank amount due in the next 12 months and the rest mostly 2031–2045. Company says it intends to secure compute beyond existing commitments.	Reuters, Sept. 29: at least $518 billion over about a decade with six partners; about 80% non-cancellable or payable regardless of use; Google at least $111.1 billion, Amazon $110 billion, Microsoft $31.4 billion; Broadcom-related equipment leases about $161.2 billion; shortfall clauses on Google and Amazon. WSJ, Oct. 20: about $450 billion of cloud deals over 7–10 years; could spend $750 billion including deals still being negotiated; commitments could rise another $150 billion; total already above $600 billion. Yahoo, Oct. 26, reading today’s filing: four deals it calculates as non-cancellable total about $430 billion (Broadcom about $161 billion, Google about $115 billion, Amazon $110 billion, Microsoft about $45 billion); adding SpaceX up to about $121 billion (90-day walk right after early 2027) and Nscale/Lambda about $86 billion, named deals about $637 billion. Filing’s own grand total left blank.	The single $518 billion line was a September-draft disclosure. It is not restated as a filled total in the public summary. Partner amounts Yahoo reads today are higher for Google, Microsoft, and SpaceX than the September Reuters schedule. The $750 billion figure is an October WSJ characterization of deals still being negotiated, not a filed total.
Governance	One Class F share to Founder LLC (seven co-founders) entitled to 50.1% of voting power on general matters, excluding Class T directors. Class F has no economic rights. Long-Term Benefit Trust, via Class T, elects a majority of the authorized board. PBC; public benefit is responsible development of advanced AI. 5% of fully diluted shares (846,840,960 Class N shares, assuming Amazon note conversion) issued to Anthropic Public Benefit Fund; board may add up to 2% more each time the share price rises 50% from the prior milestone, starting at the IPO price. Co-founders have pledged 80% of personal equity to philanthropy.	Reuters Q&A, Sept. 30: Founder LLC, seven co-founders, Class F, 50.1% voting power. FT, Sept. 29: risk factors about existential risk, blackmail, resisting shutdown. Reuters, Sept. 30: models may “resist shutdown” or conceal information; risk section nearly a third of a roughly 300-page draft.	Voting structure carried through. Page-count comparisons (261 vs. 300; “80 pages” of risk) were draft descriptions, not something to treat as unchanged.
“Adjusted profitability” and margins	No adjusted-profit line in the summary statements. GAAP operating loss for H1 2026 is $693 million. Stock-based compensation inside expenses was $2.2 billion in H1 2026 and $1.2 billion in 2025. Interest income in H1 2026 was $1,111 million. There is no gross-profit subtotal in the summary table; compute is presented as an operating expense.	Bloomberg, Oct. 14–15, and later Reuters: company told investors it was profitable on an adjusted basis in Q3, and some accounts say in Q2 as well. Motley Fool, Oct. 22: adjusted figures exclude R&D, SBC, and off-balance-sheet cloud liabilities, and marketplace revenue is grossed up. A secondary compilation claimed an 11% adjusted operating margin in Q3.	September draft did not support an adjusted-profit story. The public GAAP statements still do not. Adjusted profit remains an investor-day claim.
Valuation and use of proceeds	Net proceeds “approximately $” based on an assumed midpoint that is itself blank. Use of proceeds: general corporate purposes, including compute, hiring, possible acquisitions, and RSU tax withholding.	Reuters, Sept. 28: IPO “could value the company at more than $2 trillion,” more than double the $965 billion May round. FT, Sept. 29: backers confident of more than $2 trillion. Bloomberg, Oct. 1 (via secondary accounts): $1.8–2 trillion, marketing as soon as the week of Nov. 9. Reuters, Oct. 20: some investors weighing about $1.5 trillion.	None of these are filing statements. They did not become statements today.

Where the press narrative is ahead of the document

Three claims are doing the work in the bull case, and none of them is a filled line in this S-1.

The growth extrapolation is the investor-day print, not the prospectus. Bloomberg reported on October 14–15 that Anthropic told prospective investors third-quarter revenue was $16.8 billion and that the quarter was profitable on an adjusted basis. In the public document, the three-months-ended-September 30 revenue sentence is blank, and the statements stop at June 30. A $2 trillion multiple built on a $16.8 billion quarter is being built on a slide, not on the registration statement.

“Profitable” is an adjustment, not the GAAP result the filing actually shows. First-half operating loss is $693 million. That is a genuine improvement from a $2.14 billion operating loss in the year-earlier half and an $8.06 billion operating loss in 2025, because compute grew much more slowly than revenue in the June quarter (300% vs. 1,368%). It is still a loss. H1 stock-based compensation was $2.2 billion. Strip SBC and the $72.4 billion fair-value charge and an “adjusted profit” is easy to construct. The filing does not present that metric in the summary statements. The fair-value charge itself is not cash: it is the mark on convertible notes, derivatives, and SAFEs, and it scales with the company’s own valuation. A higher IPO mark makes that line worse until conversion. The prospectus includes a pro forma adjustment to eliminate the fair-value change related to convertible-note conversion, so this $80.7 billion is not, on the face of the document, a recurring cash hole after the deal.

The compute bill the market is trading is larger, and softer, than any single filed total. September’s “at least $518 billion, about 80% locked” was Reuters’ reading of the confidential draft. October’s “$750 billion, including deals still being negotiated” was the Journal’s. Today’s summary leaves the aggregate commitment blank. Yahoo’s October 26 reading of the same filing — about $430 billion it treats as non-cancellable, and about $637 billion of named deals once cancellable SpaceX, Nscale, and Lambda contracts are included — is a calculation, and the partner amounts have moved up versus September for Google (about $115 billion vs. $111.1 billion), Microsoft (about $45 billion vs. $31.4 billion), and SpaceX (up to about $121 billion vs. up to $84.5 billion). Those shifts are real if Yahoo’s extraction is right; they are not a sentence this review pulled out of the HTML. Treat $518 billion, $600 billion, $637 billion, and $750 billion as three different perimeters, not one number the company has sworn to.

What the filed numbers do to the bear case

The bear case does not need the $80.7 billion loss, and using it as the bear case is a mistake. Interest income alone in the first half was $1.11 billion, larger than the $693 million operating loss, because the company is sitting on more than $130 billion of cash and short-term investments. The loss that will not recur after conversion is an accounting mark on a rising private valuation. Short sellers who lead with “$81 billion loss on $16 billion of sales” will get walked through that bridge on the first day of the roadshow.

The harder version is operating leverage against take-or-pay compute, on a book that is still concentrated and still not locked in by customers.

Compute was $8.95 billion in six months, 55% of revenue, down from 160% of revenue in 2025 and from more than six times revenue in 2024. That is the bull slide. It is also the trap. If Yahoo’s reading is right that four non-cancellable deals amortize to roughly $66 billion a year, that is about twice first-half revenue annualized ($32.6 billion) before personnel, which was already $3.15 billion in the half. Revenue has to keep roughly doubling just to cover rent the company cannot cancel, while customers, on the September draft and on the public risk factor, are not themselves on long-term contracts. Usage-based revenue was $3.8 billion of the $4.6 billion 2025 total in the Reuters readout, versus $789 million of subscriptions. The filing says consumption will be “the substantial majority” only in the September reporting; the public risk factor that was retrieved says a substantial portion of revenue comes from a limited number of customers. One-fifth of the first half from two unnamed customers, if that October leak survived, means a single usage cut is a mid-single-digit billions problem against a fixed compute bill.

Marketplace accounting can flatter the growth rate the multiple is being put on. Reuters’ September 29 analysis said Anthropic books the full marketplace contract as revenue and the platform’s cut as marketing expense, and calculated about 16 cents per marketplace dollar ($351 million on $2.16 billion, 47% of 2025 sales) going back to Amazon and Google. Those two are also investors, compute suppliers, and model competitors. That circularity was the FT/Reuters September story. It is not disproven by today’s filing. If it is still the policy, reported revenue is not the cash Anthropic keeps, and the gross-margin comparison with a software company that bills directly is the wrong comp.

Control does not travel with the Class A share being sold. Class F, one share, no economics, gives the seven co-founders’ LLC 50.1% of the general vote. The Long-Term Benefit Trust elects a majority of the authorized board and does not vote on ordinary matters. Public holders are buying a residual economic claim under a public-benefit mandate and two control blocks. That was in the September draft and it is in today’s S-1. It is a governance discount, not a footnote, at a $1.5–2 trillion ask that the company has not itself put in the document.

The practical implication: the filed business is a hyper-growth usage franchise whose unit economics inflected in the first half of 2026, financed by an enormous cash balance, and still GAAP-unprofitable before a compute obligation that the summary will not even total. A bear who marks the stock off the $80.7 billion net loss is arguing with an accounting identity. A bear who marks it off blank price, blank third-quarter numbers, blank commitment totals, 55% compute intensity, customer concentration, and dual-class control is arguing with the document.

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Recent Findings Supplement (October 2026)

Anthropic (no public S-1 filed on EDGAR as of Oct 26, 2026; all details from confidential drafts reported by press).[1][2]

The confidential draft S-1 (submitted June 1, 2026) was viewed/reported by Reuters around Sept 28–30, 2026, with later versions or updates covered by WSJ (Oct 20) and others. No public filing has appeared yet despite expectations for late Sept/early Oct or around Oct 26; roadshow timing has slipped (now eyed for ~Nov 9).[3][4]

Revenue and Growth (2025 vs. 2026 H1/H2 Updates)

Filing (via Reuters Sept 30 report on confidential draft): 2025 revenue ~$4.6 billion (12x growth from ~$400 million in 2024); H1 2026 not detailed in initial reports.[5][6]

Press claims: Consistent on 2025 figure; WSJ/Bloomberg (Oct 20–21) added H1 2026 revenue $16.3 billion (vs. $1.1 billion H1 2025). Separate press reports (FT, investor meetings) note Q3 2026 revenue $16.8 billion (up ~45–46% QoQ from Q2 ~$11.5–11.6 billion).[7][8]

Changes from September draft: Newer draft/press adds granular H1 2026 and Q3 figures showing continued acceleration (revenue roughly doubled or more sequentially in periods); 2025 baseline stable across reports. No major discrepancies on core growth trajectory.[2]

Implications for competition/valuation: Explosive top-line supports bull case for $1.8–2 trillion valuation target, but requires sustaining 10x+ annual growth amid scaling. Bear case: unsustainable without matching infrastructure; single-source or early press-only Q3 numbers need verification in final filing.[3]

Losses, Margins, and Profitability

Filing (Reuters Sept 30): 2025 net loss $42 billion (~$34 billion non-cash financing write-downs/convertible adjustments); operating loss >$8 billion (mostly compute/infrastructure).[1][5]

Press claims: WSJ (Oct 20) on updated draft: H1 2026 net loss $80.7 billion (vs. $13 billion H1 2025), with ~$72 billion non-cash accounting charge from rising value of convertible notes/bonds. Compute spend H1 2026 ~$9 billion (vs. $2.3 billion H1 2025 and $7.3 billion all 2025). Press notes adjusted profitability and positive cash flow in Q3 (investor updates).[2][7]

Changes from September draft: Losses scaled dramatically in H1 2026 update (more non-cash charges tied to valuation); compute costs detailed further. Operating vs. net distinction consistent; adjusted metrics (press-only for Q3) suggest underlying improvement not fully in GAAP numbers.[9]

Discrepancies/unverified: Exact split of non-cash vs. cash varies slightly by report/date; Q3 adjusted profitability appears only in press/investor meeting accounts, not tied to specific filing language. No contradictions on massive scale, but bear case strengthened by cash burn on compute exceeding prior-year totals.[10]

Implications: High non-cash elements soften GAAP optics but highlight dilution/valuation sensitivity; compute-heavy model challenges margin expansion narratives. For valuation bears: losses and spend signal path to profitability depends on massive scale or efficiency gains not yet proven in filings.

Compute/Infrastructure Commitments and Risks

Filing (Reuters/FT Sept): At least $518 billion committed over coming years/decade to cloud/compute partners (80%+ non-cancelable or take-or-pay in some reports); risk factors span ~1/3 of ~261–300 page document, including catastrophic/existential AI risks, misalignment, misuse, and supplier conflicts.[11][12]

Press claims: WSJ (Oct 20) updates to ~$450 billion in specific cloud deals over 7–10 years (Google Cloud $111B, AWS $110B, Microsoft $31B); potential total up to $750 billion including negotiations. Customer concentration: ~20–25% revenue from 2 clients (varies by period/report). Founder LLC/Class F shares for 50.1% voting control by 7 co-founders.[2][7]

Changes from September draft: Newer reporting adds partner-specific breakdowns and higher potential total; concentration and control details consistent or refined. Risk emphasis stable.[3]

Discrepancies/unverified: Exact commitment totals and percentages differ slightly across outlets/drafts ($518B base vs. $450B listed + upsides); some figures (e.g., exact customer shares) appear primarily in press summaries. No public filing to verify line-by-line.

Implications: Enormous fixed-like obligations amplify execution risk and capex intensity vs. revenue ramp—key bear argument against lofty valuations, as access to compute and supplier dynamics could constrain growth or margins. Governance (founder control) and AI safety disclosures add unique public-company scrutiny.

Overall notes: All data post-April 2026 and recent (Sept–Oct 2026 reports on evolving drafts). No public S-1 means direct line-by-line comparison limited; numbers can shift before filing/roadshow. Press narratives of hyper-growth are supported but paired with escalating disclosed costs/risks that could pressure valuation multiples. Additional research on final public filing (when available) would resolve remaining gaps.