Anthropic IPO Filing: Q3 Compute Grew Faster Than Revenue, With $895B Committed

Anthropic's first amendment to its IPO registration, filed with the SEC on November 2, 2026, adds the quarter ended September 30, and with it the first numbers that show the risk an IPO buyer is being asked to price. Revenue rose 47% from the prior quarter to $16.96 billion. The compute and infrastructure bill rose 77% to $9.86 billion, and the second quarter's $974 million operating profit became a $567 million operating loss. Behind that bill sits a figure the October S-1 left blank: about $895.4 billion of signed commitments, "substantially all of which is related to compute and infrastructure," against revenue that is 79% billed on consumption.

The quarter's $23.3 billion net loss is not that risk. Fair-value marks on financial instruments, mostly convertible notes held by Amazon, exceed the entire loss, and the business generated about $2.6 billion of operating cash in the same three months. The risk is whether usage bought call by call can keep outrunning a compute bill that is already signed — and Q3 is the first quarter in the filing in which compute grew faster.

For the first time in the filing, compute grew faster than revenue​

The company's own yardstick is "revenue per dollar of compute." The filing reports single quarters only in its management discussion, with expenses grouped by nature (compute and infrastructure, personnel and so on). The ledger records the filing's statements by reported period — FY2024, FY2025, the first half of 2026 and the third quarter — so it cannot draw this series, and the table below comes straight from the filing.

Source: S-1/A, quarterly results of operations. The ratio column is our calculation. The company reports the year-over-year growth rates for Q3 itself: revenue up 1,127%, compute and infrastructure up 382%.

Revenue first covered the compute bill in Q1 2026 and was more than double it in Q2. In each of the five quarter-to-quarter steps before Q3 the ratio rose; in Q3 it fell. The filing names the cause — "$5.0 billion of compute under short-term commitments, which currently costs significantly more than comparable compute procured under our multi-year commitments" — and says it "reduced revenue per dollar of compute compared to the preceding quarter." Elsewhere the company describes "a compute-constrained environment where customer demand exceeds available compute." Buying short-term capacity at a premium is what that claim looks like on an income statement.

The premium did not land on serving customers. Substantially all of cost of revenue, the filing says, is compute and infrastructure for customer-serving workloads, and cost of revenue was 14.3% of Q3 revenue against 14.6% in the first half (our calculation from the functional expense tables). So at least $7.4 billion of the quarter's $9.9 billion compute bill went elsewhere — mainly to what the filing reports under research and development: model development, research and internal usage. That part of the bill buys future models, not this quarter's revenue.

Two non-cash charges widened the GAAP swing: $1,960 million of non-cash charitable contributions under the employee donation matching program, and $1,070 million of stock-based compensation. Anthropic's Adjusted Operating Income, a non-GAAP measure, adds both back and still rose, to $2.5 billion from $2.2 billion, while Adjusted Operating Margin fell from 19% to 15%. On the GAAP basis, operating income fell from $974 million to −$567 million. Both views agree on what moved the margin: compute.

One quarter of premium capacity is not a trend, and the year-over-year comparison still favours revenue by a wide margin. But the S-1 had already warned that as agentic workloads grow, "the aggregate compute required to serve our customers could increase disproportionately relative to the associated revenue." Q3 is the first quarter whose numbers look like that sentence.

$895 billion of costs is signed; most of the revenue is not​

The S-1 filed on October 26 left the commitments total blank. Amendment No. 1 fills it in: about $895.4 billion of purchase commitments and leases as of and after September 30, including short-term commitments and leases that have not yet started.

The timing is what matters for the next two years. About $69.8 billion falls due in the 12 months after September 30 — roughly a year of revenue at Q3's pace, which annualizes to $67.8 billion (our calculation). About $447.5 billion is expected to be incurred before the end of 2030, and substantially all of the rest between 2031 and 2045. Separately, the filing estimates $125 billion to $150 billion of payments for additional TPU compute committed without a fixed dollar amount, for delivery between 2028 and 2031.

The revenue that has to cover those payments is built differently. Of the $33.2 billion earned in the first nine months of 2026, $26.3 billion — 79% — was consumption-based, billed as customers use the models. Remaining performance obligations, the contracted revenue not yet recognized, were $13.8 billion at September 30, about 75% of it expected within 12 months. Model versions released in the six months to September 30 accounted for over 80% of Q3 revenue. Set $13.8 billion of contracted revenue against $895 billion of contracted spending and the ratio is about 1 to 65 (our calculation). That comparison is deliberately unflattering, since consumption customers do not sign multi-year minimums, but it states the structure plainly: the costs are fixed years ahead, and the revenue is earned call by call on models a few months old.

The mitigants are in the same filing. About $213.8 billion of the $895.4 billion sits in arrangements subject to exercisable termination rights or to conditions that must be met before they start, such as the counterparty securing financing, facilities or regulatory approvals. Where suppliers miss delivery dates, Anthropic can generally terminate all or part of the obligation or obtain remedies such as service credits. Demand is also less concentrated than it was: about 79% of Q3 revenue came from customers outside the top five, up from about 64% in Q1 2026, and customers paying $100,000 or more over the trailing twelve months numbered more than 11,900, up from more than 950 a year earlier. In September the company enlarged its senior secured revolving credit facility to $15.0 billion from $3.25 billion, maturing in 2031, with a covenant to hold at least $5.0 billion of liquidity at each quarter-end from December 31, 2026.

The $23.3 billion loss is mostly a mark on Amazon's notes​

Q3's GAAP net loss was $23,291 million. Two lines below operating income account for more than all of it: a $21,936 million change in the fair value of convertible notes, derivative liabilities and SAFEs, and a $1,557 million change in the fair value of other mark-to-market instruments. The view below is the quarter as the open ledger records it. The treemap sizes each expense account by its Q3 amount, and the lists beneath it are the full income statement; double-entry records income as a credit, so revenue appears as a negative number.

The fair-value block, $23,493 million, is larger than cost of revenue, research and development, sales and marketing, and general and administrative combined ($17,523 million). The filing prints no functional expense split for a single quarter, so each Q3 expense line in the ledger is the nine-month figure in the amendment minus the six-month figure in the October S-1; the Q3 period file shows each subtraction beside its posting.

The mark lands on the balance sheet. The notes are non-interest-bearing rollover notes held by Amazon with $6,203 million of principal, convertible into about 1.84 billion Class N shares at fixed prices of $2.0928 and $5.0478. They are carried at fair value, so every rise in Anthropic's valuation raises the liability and books a loss. In the ledger they are the long-term debt account. A liability is a credit balance and carries a minus sign, so the line falls as the debt grows:

The balance went from $108,566 million on June 30 to $130,502 million on September 30. That $21,936 million step is exactly the quarter's fair-value charge on the notes, and the liability now stands at 21 times its principal (our calculation).

If you have raised money on a SAFE or a convertible note, this is the same instrument at a different scale: a note that will become equity is valued like equity, so its accounting value moves with the company. For a seed-stage startup the mark is a footnote. Here it is larger than the whole net loss.

Cash tells the operating story instead. Operating cash flow was $6,569 million for the nine months against $3,929 million for the first half, so Q3 contributed about $2,640 million, or 16% of revenue (our calculation). Anthropic raised no new money in the quarter, and cash plus short-term investments held at $131.8 billion.

Across 33 months of statements, the marks are 94% of the losses​

Q3 is not an outlier. This query runs over every income statement in the ledger and returns, for each reported period, revenue, the fair-value loss and the net result (the Equity:Adjustments posting carries net income, so a loss is negative). The ledger starts in FY2024 because December 31, 2024 is the earliest complete balance sheet the registration statement presents.

Across the four periods, fair-value losses total $144.3 billion against $154.3 billion of net losses (our calculation from the query). Their share has risen every period: 65% of the FY2024 loss, 82% of FY2025's, and slightly more than the whole loss in the first half of 2026 and in Q3.

Take the marks out and the after-tax result moved from a $2.9 billion loss in FY2024 and a $7.7 billion loss in FY2025 to small profits of $0.4 billion in the first half of 2026 and $0.2 billion in Q3 (our calculation; the company reports no such measure). Those profits come from interest on the cash pile, not from operations: interest income was $1,248 million in Q3 alone, and the GAAP operating result for the nine months was a $1,260 million loss, with Q2 the only profitable quarter in the filing's quarterly table.

A Class A share buys the economics, not the control​

The offering is Class A common stock on the Nasdaq Global Select Market under the symbol ANT, and Amendment No. 1 still leaves the price range and share count blank. What a buyer gets is clearest class by class:

Anthropic is a public benefit corporation, so its board must balance shareholders' financial interests against a stated purpose: "the responsible development and maintenance of advanced AI for the long-term benefit of humanity." The filing is direct about what the structure means for a buyer's options: it "is likely to have the effect of limiting the likelihood of an unsolicited merger proposal, unsolicited tender offer, or proxy contest for the removal of directors."

Partners can add non-voting supply around the deal. Google holds an option to buy up to $10.0 billion of Class N stock at the IPO price in a concurrent private placement. Under a hardware supply agreement, AMD committed to buy up to $5.0 billion of Class N stock, which Anthropic can draw in increments as GPU delivery and deployment milestones are met, the first expected in 2027. Amazon's notes convert into Class N at the lower of their fixed prices and the IPO price, but only up to 12% of Anthropic's capitalization unless Amazon waives the cap. Any excess is reissued as a new rollover note, so the fair-value line need not disappear at the listing.

Three numbers will say whether Q3 was a bridge or a trend​

• Revenue per compute dollar in Q4 2026. Back above Q2's $2.08 would say the $5.0 billion of short-term capacity was a bridge to cheaper multi-year supply. A second decline below Q3's $1.72 would say the agentic-workload risk the S-1 describes is the trend.
• The price range in the next amendment. It sets the market value the public is asked to put on $895.4 billion of commitments, $69.8 billion of them due within a year, and $67.8 billion of annualized revenue.
• How much of Amazon's notes convert. Notes that stay outstanding above the 12% cap keep marking to market, so GAAP net income could keep swinging with the share price after the IPO.