Microsoft’s AI shift drops CoreWeave stock by $3 amid revenue concerns

Microsoft’s move toward in-house AI infrastructure sent CoreWeave shares down $3 as investors weighed the cloud provider’s heavy dependence on a single major client. The selloff underscores the revenue concentration risk facing suppliers whose growth is tied to Microsoft’s AI spending plans. CoreWeave, which rents out GPU capacity for AI workloads, has built much of its business around Microsoft and other hyperscalers. The reaction highlights how quickly sentiment can shift for AI infrastructure names when a key customer signals a change in strategy. Investors will watch CoreWeave’s next earnings and contract disclosures for signs of whether Microsoft’s internal shift translates into slower demand.