
What happened
Broadcom booked $16.7 billion of AI chip sales in fiscal Q3 2026, up 221% year over year, and guided fiscal Q4 to $21.7 billion, a 236% increase. CEO Hock Tan told CNBC Anthropic is on track to become its largest custom chip customer in 2027.
Why it matters
The top five end customers made up about 55% of fiscal Q3 revenue, up from about 40% a year earlier, so growth increasingly depends on a handful of buyers, with Anthropic likely to lead that group.
What to watch
The premium multiple hinges on whether growth holds and whether concentration keeps rising; the stock fell 4.8% in one session recently after Anthropic's CEO argued for a slower pace of model development.
WHO IT HITSThis lands hardest on Broadcom shareholders and on the cloud and data center operators that depend on its custom accelerators and networking chips, since their supply and roadmap are tied to a small set of large buyers.
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Broadcom's position rests on building with its customers rather than selling off the shelf. A custom accelerator is designed around one customer's workloads, and the networking chips linking thousands of them together come from the same supplier. Once a cloud company builds its systems around a design, switching means starting over. Software adds a second anchor: infrastructure software revenue grew 29% to $8.75 billion in fiscal Q3, helped by VMware Cloud Foundation, and most new software contracts no longer include termination-for-convenience provisions.
The mix is shifting toward AI. Semiconductors were 70% of fiscal Q3 revenue, up from 57% a year earlier, as that segment rose 127%. Total revenue climbed 86% to $29.6 billion. Adjusted EPS was $3.32, up 96%, while GAAP EPS was $2.68, up 215% — the gap reflects items like acquisition-related amortization and stock-based compensation, and since GAAP grew faster, the direction holds either way. Free cash flow hit a record $13.7 billion, or 46% of revenue.
The open question is whether the premium multiple is fair given how concentrated that growth is. With top five customers at about 55% of revenue, up from about 40%, the story leans on a small set of buyers, and Anthropic's expected rise to largest customer in 2027 ties the outcome to one of them. The stock fell 4.8% in one session recently after Anthropic's CEO argued for a slower pace of model development, even as Tan said long-term AI revenue targets hadn't changed — so the test is whether that pace, and the customer mix, hold.
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