SpaceX Relies on Anthropic for a Third of Its Revenue

What happened

SpaceX's largest customer is Anthropic, which accounted for 34.5% of third-quarter revenue, Bloomberg reported. Anthropic has agreed to spend as much as $120.5 billion under computing contracts with SpaceX through 2029, with 90 days' notice to cancel from early 2027.

Confirmed

Global impact / market context

One customer supplying about a third of revenue concentrates risk: if Anthropic cancels, SpaceX loses a large share of sales and must find replacement buyers or cut costs, which can pressure profit and capital spending plans tied to its AI computing unit.

Analyst inference

SpaceX shares were down 4.01% as of 10:00 a.m. ET. The 90-day cancellation right from early 2027 weakens the value of long-term contracts, so investors may discount future Anthropic revenue rather than treat it as guaranteed.

Analyst inference

What to watch

1. Watch whether SpaceX's quarterly filings keep naming only Customer B, since that limits visibility into how much revenue depends on Anthropic and on other large buyers. Confirmed
2. Watch whether Anthropic gives notice to terminate contracts after early 2027, because that step would test how quickly SpaceX can replace a customer providing about a third of revenue. Proposed
3. Watch SpaceX's Super Intelligence segment sales mix, since a shrinking Anthropic share could show either diversification or lost business, changing how investors judge revenue stability. Analyst inference

Evidence

• gurufocus.com