Cerebras Systems shares dropped almost 20% on Wednesday, the day after the AI chipmaker delivered its first earnings report as a public company. Q1 revenue came in at $193 million, up 94% year-over-year, and net loss narrowed to $14 million from $23.9 million a year earlier. The selloff was driven not by the print but by guidance: Cerebras forecast a full-year core gross margin of 38% to 41%, down sharply from the 47% it posted in the first quarter.
The stock hit a new low Wednesday, nearly touching the company's IPO price. Analysts at Mizuho and Wedbush actually raised their estimates after the call, a split with the market reaction that underscores how much of the move was guidance-driven rather than fundamentals-driven. About 28 million Class A shares held by directors, officers, and nonemployee shareholders also became available for trading on the second trading day after Tuesday's earnings announcement, per Cerebras's prospectus, adding mechanical selling pressure on top of the guidance shock.
CEO Andrew Feldman told CNBC the margin forecast had been mischaracterized. He said management had been explicit on the call that Cerebras will need to rent back some of its own equipment from one of its largest customers while it builds out and deploys new data center capacity. That arrangement compresses reported gross margins this year, even as the underlying business expands.
Key facts
- 01Cerebras stock fell almost 20% Wednesday despite a Q1 beat, nearly retesting its IPO price.
- 02Full-year gross margin guidance came in at 38–41%, well below the 47% reported in Q1.
- 03Q1 revenue hit $193 million, up 94% year-over-year, with net loss narrowing to $14 million from $23.9 million.
- 04About 28 million Class A shares unlock for trading on the second trading day after Tuesday's earnings.
- 05Mizuho and Wedbush raised estimates after the call even as the stock cratered.
Feldman framed the lock-up structure as a deliberate choice. The staggered timeline, he said, was designed to smooth out the share release schedule that typically lands in a single tranche several months after an IPO. "Whether that's a success or not, we'll have to see," he told CNBC, an unusually candid acknowledgment from a CEO whose stock had just shed a fifth of its value.
The competitive picture is part of the bull case Cerebras is trying to keep intact. Nvidia and other accelerator vendors are wrestling with shortages of high-bandwidth memory from SK Hynix and Micron, and with capacity constraints on Taiwan Semiconductor Manufacturing Co.'s most advanced process nodes. Cerebras, whose wafer-scale architecture sidesteps both, does not need either of those inputs to ship. In a supply-constrained inference market, that is a structural edge — if the company can convert it into deployed capacity fast enough.
That last part is the bottleneck. Cerebras is racing to open more data centers at a moment when public opposition to AI siting is intensifying and permitting timelines are stretching. The rent-back arrangement with a major customer is essentially a bridge solution: keep capacity live for paying workloads while the company's own footprint catches up.
Investors clearly priced in the gap. A core margin sliding from 47% to the high 30s reads, on first glance, like a business losing pricing power — which is not what is happening here, but is the natural interpretation when the company is also burning capital to expand. Cerebras has not yet broken out how much of the 2026 margin compression reverses in 2027 once its own data centers come online, and that ambiguity is doing real damage to the stock.
The broader context matters. OpenAI just unveiled its first custom inference chip built with Broadcom, signaling that the largest AI workloads are increasingly being run on bespoke silicon rather than off-the-shelf accelerators. SK Hynix is preparing a $29 billion Nasdaq listing to court US AI investors. Micron just posted quarterly revenue of $41.45 billion on the back of AI memory demand. The AI silicon stack is consolidating into a small number of very large winners, and Cerebras is fighting to be one of them.
The skeptic case is straightforward. Cerebras is a single-architecture company competing against Nvidia's dominant CUDA ecosystem, with a still-narrow customer concentration and a margin profile that the market just learned will compress for at least a year. The lock-up unlock adds technical selling. If the rent-back arrangement extends beyond 2026, or if data center buildouts slip on permitting, the 38–41% guide becomes a floor rather than a trough.
Cerebras's first earnings call exposed the gap between a company beating its own internal plan and a market that does not yet have the framework to price wafer-scale economics. Feldman's pitch — that the architecture wins in a memory-constrained world, that the margin compression is a timing issue, that the plan is on track — is coherent. Whether it survives two more quarters of guidance like this is the question the next print will answer. For now, the market has decided the IPO premium was wrong.
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