CoreWeave Just Cut Microsoft Concentration Risk: 3 Deals, $35B in New Contracts
CoreWeave ($CRWV) spent years as Microsoft's GPU farm. [Microsoft represented 62%](https://www.cnbc.com/2025/05/01/coreweave-stock-surges-after-microsoft-sticks-to-spending-plans.html) of CoreWeave…
CoreWeave ($CRWV) spent years as Microsoft's GPU farm. Microsoft represented 62% of CoreWeave's revenue in 2024, and that kind of concentration was always going to scare public-market investors. April 2026 changed the script. CoreWeave announced an expanded agreement with Meta to provide AI cloud capacity through December 2032 for approximately $21 billion, then added a multi-year agreement with Anthropic to power its Claude AI models, and finished the month with a $7 billion commitment from Jane Street ($6 billion in cloud services plus $1 billion equity investment at $109 per share). Three deals, two weeks. The question investors face now: is this diversification real, or just another layer of backlog on a balance sheet already burdened by over $21 billion in debt?
The Meta Anchor: $35 Billion in Capacity Commitments
CoreWeave now holds $35 billion in contracts with Meta, making the social-media giant one of its largest customers alongside Microsoft. The new $21 billion agreement (CoreWeave and Meta Expand $21B AI Cloud Deal) is an expansion of a previous deal to supply Meta with $14 billion worth of AI cloud infrastructure, and it locks in capacity through 2032. Meta's urgency is not subtle. Meta anticipates capital expenditures between $115 billion and $135 billion in 2026, and a Meta spokesperson said the CoreWeave deal is "part of our portfolio-based approach to infrastructure".
What matters here is not the dollar figure but the mix arithmetic. CoreWeave CEO Mike Intrator said no customer will represent more than 35% of total sales (cnbc.com) going forward. That is down from Microsoft's 62% share in 2024 and a stated 85% of backlog concentration earlier in 2025. The company now serves nine of the leading ten AI model providers (CoreWeave Announces Multi-Year Agreement With Anthropic), and the Jane Street equity investment at $109 per share (a 7% discount to the prior close per Reuters) adds a quant-finance customer that operates "like a frontier lab, continually breaking new ground in deep learning" (qz.com) per $CRWV management.
Jane Street and Anthropic: Testing the Model Beyond Hyperscalers
The $7 billion Jane Street commitment (split between $6 billion in cloud spend and $1 billion in equity) is the most interesting tell. Jane Street is not a hyperscaler trying to build its own inference empire. It is a trading firm that generated more than $24 billion in revenue in the first nine months of 2025, and it is committing $6 billion to rent GPU clusters it does not intend to own. That is a vote for specialization over vertical integration. The Anthropic deal, though undisclosed in value, will bring compute online starting later this year (CoreWeave Announces Multi-Year Agreement With Anthropic) and represents a phased infrastructure roll-out with the potential to expand over time (CoreWeave Announces Multi-Year Agreement With Anthropic). Anthropic's annual run rate topped $30 billion, up from $9 billion at the end of 2025, and adding $CRWV as a third major capacity partner (alongside AWS and Google Cloud) signals that inference demand is outrunning supply even for a company backed by two hyperscalers.
The backlog math is eye-watering. CoreWeave's revenue backlog stood at $66.8 billion as of December 31, 2025, and layering in the new Meta commitment brings the pro forma figure to roughly $87.8 billion against total debt exceeding $21 billion. The company posted $5.13 billion in full-year 2025 revenue but net losses totaling $1.17 billion while it invests in data center buildouts. Management guided 2026 capital expenditures between $30 billion and $35 billion.
The Durable-Model Test: Can Backlog Survive Execution Risk?
The bull case is simple. $CRWV has locked in multi-year, take-or-pay contracts with the companies that need GPU inference capacity at scale, and it has done so at a moment when even hyperscalers with $630 billion in collective capex budgets cannot keep up with demand. The $66.8 billion backlog is 13 times trailing revenue. If that converts, the stock is cheap. If it does not, the debt service crushes them.
The bear case is that backlog is not revenue until the clusters come online, and $CRWV has already trimmed 2025 guidance once due to third-party data center delays. CEO Michael Intrator said during the Q3 2025 call that temporary delays related to a third-party developer affected the schedule (fortune.com), and the company has execution risk: revenue only materializes if new capacity comes online on schedule (247wallst.com). Meanwhile, interest expense in Q4 2025 was $388 million, meaning nearly one-third of revenue is allocated to interest payments.
The diversification story is real. Microsoft's share of backlog has fallen from 85% at the start of 2025 to 35% by Q3, and adding Meta, Anthropic, and Jane Street in a single month proves demand extends beyond a single hyperscaler. But the durability question hinges on whether $CRWV can convert $87.8 billion of backlog into delivered clusters before the debt service or a capex crunch forces a financing reset. The April deals buy time. Now they need toprove the model works at scale.