AI Chipmaker Cerebras Delivers Massive IPO Pop But History Warns of Trouble Ahead

Record-Breaking Debut Masks Familiar Warning Signs

Cerebras Systems just pulled off the biggest U.S. tech initial public offering since Snowflake made its debut in 2020. The artificial intelligence chipmaker priced its shares at $185 on Wednesday evening, above its already-raised range of $150 to $160. The deal raised $5.55 billion and valued the company at about $56.4 billion on a fully diluted basis.

Shares opened at $350 on the Nasdaq Thursday morning—nearly double the IPO price. And sure enough, shares soared, reaching highs of $385 before closing at about $311 on its first day of trading. Demand for the AI chipmaker's debut was more than 20 times oversubscribed.

The euphoria surrounding Cerebras reflects Wall Street's insatiable appetite for AI infrastructure plays. Cerebras designs wafer-scale AI processors—chips roughly the size of a dinner plate, with around four trillion transistors etched onto a single piece of silicon. This unique approach promises to accelerate AI inference tasks compared to traditional GPU clusters.

Strong Fundamentals Drive Investor Interest

For the 2025 fiscal year, the company posted revenue of $510 million, up 76% from $290.3 million a year earlier, and swung to a net profit of $87.9 million from a loss of $484.8 million. Its contract backlog stood at $24.6 billion at the end of 2025, with roughly $20 billion tied to OpenAI.

In January, the company signed a deal with OpenAI worth more than $20 billion to supply 750 megawatts of computing capacity between 2026 and 2028. Amazon Web Services followed in March, agreeing to deploy Cerebras chips alongside its in-house Trainium processors inside Amazon-owned data centers.

These partnerships validate Cerebras' technology and provide substantial revenue visibility. Cerebras is handing OpenAI warrants worth up to 10% of the company, around $5 billion at the IPO midpoint, or roughly half the gross profit it stands to make on the deal.

Dangerous Red Flags Emerge

Despite the impressive debut, several concerning patterns have emerged. About 86% of its 2025 revenue came from just two UAE-linked customers. And as of market close on Thursday, the stock already trades at more than 130 times sales, well above the multiples on much larger and more profitable chip companies like Nvidia.

The catch for most individual investors, of course, is that they can't get shares at the $185 IPO price. They have to buy in at the much higher first trade—somewhere around $360, in this case—or wait it out. The 180-day insider lockup on CBRS stock is set to expire around mid-November 2026 on the standard IPO clock. CEO Andrew Feldman alone holds roughly $1.9 billion in stock at the offer price, with co-founder and CTO Sean Lie at about $1 billion. If CBRS holds above $300 a share into November, the post-lockup supply math gets very uncomfortable for new public-market buyers.

Historical Patterns Suggest Caution

Research from Jay Ritter, a finance professor emeritus at the University of Florida who tracks long-run IPO returns, shows that newly public companies from 1980 through 2024 have underperformed similar-sized firms by an average of about 3.6% per year during their first five years on the market. For IPOs since 2010, the first-year shortfall has been even sharper—a roughly 9-percentage-point gap versus comparable non-IPO firms, on average.

While Cerebras represents a credible challenge to Nvidia's dominance in AI chips, the combination of extreme valuations, customer concentration, and pending insider sales creates significant headwinds. The crown may be short-lived. SpaceX, OpenAI and Anthropic are all reportedly preparing 2026 listings, with SpaceX and OpenAI alone expected to raise a combined $135 billion. Smart investors might wait for the inevitable volatility to create better entry points.