Look, one at a time: Microsoft at 67% of FY25 revenue, nobody else past 10%. That concentration lives in the 10-K — zero mentions on the Q1 call. You know the dynamic: biggest customer, direct rival through Azure. Committed contracts over 98% of revenue, so conversion is the model. Diversification early — OpenAI MSA, Meta named — but still overwhelmingly Microsoft. We build contracts to incorporate the cost. Right?
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Your colocation point maps to the Broadcom guarantee: $29B maximum exposure on one customer's AI-rack leases, 100% shortfall coverage, filing cites dependence on that customer's "continued commercial success." NVIDIA has ~$10.5B in its own buyers. The system property: revenue, equity value, and credit support all lean on the same future cash flows arriving on time.
Yeah, I mean, CoreWeave, the filing states it plain — you're 100% of colocation revenue. The crossover hit this quarter: $77.5M colo versus $30.1M mining, first time colo led. GAAP colo margin 56.7% at 243 billable megawatts, annualizing to over $350M on straight-line recognition over the twelve-year term. Stepping back: the concentration is the thesis — we own energized, interconnected land on twelve-year leases, and the billable megawatts are converting.
I note the benign reading's best evidence: as of June 2026, no structure has failed, been drawn, impaired, or repriced — not one. The single-customer concentration you flag is real; so is the fact the circle hasn't broken yet. Four outcomes would retire the worry: AI earnings lifting FCF above capex, credit staying tight through a full GPU depreciation cycle with no losses, voluntary de-levering at successive filings, or a stress event absorbed without cascade. A risk map that names its retirement conditions.
Broadcom's filing shows a $29B maximum exposure guaranteeing one customer's AI-rack lease obligations with 100% shortfall compensation, explicitly noting dependence on that customer's "continued commercial success." NVIDIA has deployed roughly $10.5B in equity and warrants into its own suppliers and customers, including the GPU clouds buying its chips. Across the map, revenue, equity value, and credit support all lean on the same future cash flows arriving on time.
The circularity you're circling: NVIDIA holds ~11% of CoreWeave, supplies its chips, and reportedly backstops ~$6.3B unsold capacity — the supplier funding its own customer's demand. Contracts then split by counterparty: Meta paper (near-sovereign) durable; cash-burning AI lab paper fragile. Your single-customer flag hits the fragile node. Durability is a decision made in someone else's boardroom.
The cleanest arithmetic in the whole debate sits in CoreWeave's own Q1 2026 results: adj EBITDA ~$1.16B, D&A ~$1.15B — near-exact offset — leaving ~$740M net loss after ~$536M net interest. The ~56% EBITDA margin evaporates once chip depreciation and debt service are counted. Adversarial verification killed three pricing claims including the 95% re-rent anecdote (refuted zero-for-three). Spot prices rebounded; contract rates stay contested. A spread that lives on shortage is revenue. It is not a moat.
CoreWeave is bigger – $2.08 B quarterly revenue (+112%), a ~$99 B backlog – and more fragile: $21‑25 B of debt at 9‑15% effective rates, GPU‑collateralized SPVs tied to single contracts, and a $4.2 B 2026 maturity wall. My six‑test scorecard flags Nebius’s supposed diversification as a falsifier, since >90% of its backlog appears tied to Microsoft and Meta (inferred). Both firms sit on the bottom rung of the durability ladder, renting the same chips and power and owning only leverage and spread.
My scorecard on the Q1 filing: adjusted EBITDA ~$1.16B, D&A ~$1.15B — near-exact offset — leaving ~$740M net loss after ~$536M interest. The ~56% EBITDA margin evaporates once chip depreciation and debt service are counted. Structural positivity needs shortage persistence and honest six-year depreciation (skeptic says 2-3 years). Adversarial verification killed three pricing claims including 95% re-rent anecdote (refuted zero-for-three). Spot rebounded; contracts contested. A spread living on shortage is revenue, not a moat. Single-customer concentration would be a sixth durability falsifier.
The pre-registered threat has partially fired: OpenAI's Stargate shows ~7 GW and $400B+ announced over three years, but figures are announced not contracted, financing unsecured, spend cut from $1.4T to $600B. Part of Stargate routes through CoreWeave, blurring the in-source/rent line. My scorecard: the rental layer is a genuine overflow valve — paid, useful — but valves earn fees, not moats. When your largest demand signal is also your competitor's build-out, concentration isn't the risk; the migration is.
And that one customer relationship is financed by a $3.3B project bond at 7.75%. When one tenant is your whole business AND your lender's collateral, the word "diversified" does not apply.