Anthropic's S-1 Holds the Best Bull Case in AI and a Bill Its Suppliers May Carry
The filing shows that frontier-model economics scale, and it leaves open who actually carries the compute risk if the listing slips.
The bull case is in the compute line
Most coverage skipped compute intensity. Augment's analysis of the Reuters-reviewed figures puts 2025 compute and infrastructure spend at $7.33B on roughly $4.6B of revenue. In 2024 it was about $2.44B on ~$383M. Compute per revenue dollar therefore fell from about $6.37 to about $1.59, a roughly 75% drop, while revenue grew about 12x and compute grew 3x.
There is a caveat. Each new revenue dollar still needed about $1.16 of new compute, so the business does not yet fund itself at the margin. The compute figure also mixes training spend for future models with inference spend for current customers, so it is not gross margin. How the public S-1 splits those two is the disclosure that will show whether the ratio keeps falling.
Sources disagree on the revenue base, and that is the valuation question
Augment puts the $2T+ target at about 435x trailing revenue, against about 210x at the $965B May round. It argues $2T only works if the S-1 shows a run-rate of roughly $20–40B. AINews reports about $11.5B of Q2 2026 revenue and ARR above $65B, which would make $2T about 31x ARR. Q2 annualizes to about $46B, roughly 40% below that ARR claim. The gap means either sharp growth after Q2 or a generous definition of ARR. Unwind AI says no revenue figures leaked at all. Treat any 2026 run-rate as unverified until the public filing.
The $518B looks more rigid than it is, and that shifts risk to suppliers
The Information's reading of the prospectus changes the risk map. Anthropic has committed up to $84.5B to SpaceX through 2029 for Nvidia-based compute, and most of it can be cancelled on 90 days' notice. For Anthropic, a headline fixed obligation works like a variable-cost option. For SpaceX, and for any supplier on similar terms, that backlog is closer to a rolling purchase order. Augment separately calls the $518B its lowest-confidence figure and reads it as multi-year contracted commitments, not one year of cash.
Anthropic has protected itself against a delayed listing; a supplier booking lab backlog at face value is holding the option Anthropic kept.
The reporting doesn't say whether SpaceX's termination rights are mutual. That matters because SpaceX now owns Cursor and runs Grok Bot, so it competes with Anthropic.
Three more disclosures to price
- Concentration: about $1.1B, nearly a quarter of 2025 revenue, came from two unnamed customers. The Information AM notes that their identity decides whether this is sticky revenue through hyperscaler channels or spend from app-layer startups that can move.
- Cadence: the risk factors say the business requires a "continuous and overlapping cadence" of model releases. The filing surfaced the same week OpenAI shelved GPT-6.1 Astra after safety testing. A $2T price quietly assumes releases never slip.
- Control: Anthropic is reportedly seeking Palantir-style voting control for its seven co-founders. That is more likely to affect price than to kill deals.
The smart move
Augment expects the listing after the November midterms. The confidential filing has to go public at least 15 days before the roadshow, so the real numbers are weeks away. Until then, the only defensible mark is the priced round. Also flag portfolio companies that carry SAFEs, convertible notes or warrants classified as liabilities. Their Q3 markups will book the same kind of non-cash GAAP loss that inflated Anthropic's headline.
What to do
Anchor Q3 marks on Anthropic-linked SPVs, secondaries and rounds priced off lab valuations to the $965B May round before the September 30 close, and document the $2T+ figure as a target only.
Commission an S-1 diligence checklist this week. It should cover the $518B schedule and who the counterparties are, whether SpaceX's 90-day termination rights are mutual, who the two largest customers are, the H1 2026 compute-to-revenue ratio, and the share count after conversions.
Map every AI-infrastructure holding that has more than 30% of its backlog tied to one or two labs this quarter, and model a six-month IPO slip combined with 90-day contract cancellations.