Major ClientsThin moat

CoreWeave's customer concentration is the subject of a root threat on this company, and the numbers are not in dispute: Microsoft was about 67% of fiscal 2025 revenue, and a revenue backlog of about $104 billion is filled substantially by four organisations¹.

These pages take up what the concentration discussion leaves out — the quality of the counterparties, rather than their number. That question has three parts. First, several of CoreWeave's largest customers are financed, in part, by the same company that supplies CoreWeave's GPUs, which makes some of this demand circular in a way that a contract value does not reveal. Second, the AI labs signing the largest commitments are companies consuming capital at extraordinary rates and not generating profits — a contracted dollar is only as good as the party owing it. Third, CoreWeave has essentially no ordinary enterprise business, which is the cushion every other cloud provider has.

The structural point underneath all three is that CoreWeave's revenue depends on the AI investment cycle continuing, not merely on its customers being satisfied. Its counterparties are spending against expectations of future model economics rather than against current cash flows.

Watch contracted revenue converting into collected cash. Backlog is a promise; cash collected from customers who are themselves raising capital to pay is the measure that matters, and it is the one that would deteriorate first.