Cerebras Systems NASDAQ:CBRS, the AI chip company, fell nearly 20% on June 24 after its inaugural post-IPO earnings report revealed a sharp decline in near-term gross margin guidance that overshadowed record revenue and a landmark OpenAI compute deal.

Key Highlights

• Cerebras fell nearly 20% on its first full trading day after its inaugural post-IPO earnings report.

• Q1 revenue rose approximately 94% year-over-year to $193.4 million, but Q2 gross margin guidance fell to 36% to 38% from 47% in Q1.

• The company announced a more than $20 billion multi-year compute deal with OpenAI alongside an AWS partnership.

• Approximately 28 million insider shares became eligible to trade under a staggered lock-up expiry on the same day.

Cerebras Systems (NASDAQ:CBRS), the AI chip company known for its wafer-scale processor architecture, fell nearly 20% on June 24 in its first full trading session following the release of its inaugural post-IPO earnings report, as investors reacted sharply to a steep deterioration in near-term gross margin guidance that overshadowed otherwise strong results.

First-quarter revenue climbed approximately 94% year-over-year to $193.4 million, reflecting robust demand for Cerebras's compute capacity from hyperscale AI customers. The quarter was also marked by landmark commercial developments, including a multi-year compute supply agreement with OpenAI valued at more than $20 billion and a newly announced partnership with AWS that extends the company's distribution reach.

Despite those headline achievements, management guided second-quarter gross margin to between 36% and 38%, down sharply from 47% recorded in Q1. The compression was attributed to the cost of leasing back data center capacity from existing customers while Cerebras constructs its own facilities, a transitional dynamic that imposes a near-term profitability cost even as revenue scales. For a newly public company whose valuation depends heavily on margin expansion assumptions, the magnitude of the guidance revision was sufficient to prompt a broad reassessment of near-term earnings expectations.

Selling pressure was compounded by the staggered expiry of lock-up restrictions, which allowed approximately 28 million insider shares to become eligible for trading on the same day as the earnings release.