Cerebras stock plummets 17% after margin-guidance miss as CEO says warning was 'misunderstood'

Cerebras Systems, an AI chipmaker trading publicly since February 2026, reported first-quarter results Tuesday and saw shares slide 17% by Wednesday after the company issued guidance for narrower gross margins through 2026. The core business margin (excluding customer warrants and data center pass-through revenues) came in at 47% for Q1, but management guided for 38%–41% for the full year, signaling material compression.

CEO Andrew Feldman said on CNBC that investors "misunderstood" the guidance, arguing the company is "beating" its IPO plan despite the margin miss. He cited a previously disclosed arrangement to rent equipment back from a major customer and noted the trajectory is "not going to be a straight line." Analysts at Mizuho and Wedbush raised estimates after the call, but the market punished the stock anyway—reflecting investor skepticism about the path to profitability.

Feldman also highlighted a staggered lock-up expiration, with about 28 million Class A shares available for trading immediately after the earnings announcement, adding selling pressure. The CEO separately emphasized that Cerebras does not depend on TSMC's cutting-edge nodes or NVIDIA's high-bandwidth memory, unlike rivals, but acknowledged that data center expansion faces real estate constraints: "We're trying to move at the speed of AI, and data centers move with the speed of real estate."

For infrastructure teams: Cerebras' margin squeeze reflects the harsh unit economics of specialized inference hardware without scale. Even a 47% gross margin is healthy, but if the company must rent back infrastructure to customers to win deals, the real operating leverage is elsewhere. Watch whether Q2–Q3 results validate the CEO's "beating the plan" narrative or if customers are simply deferring spend until performance-per-dollar numbers stabilize.