Cerebras IPO Soars 68%, Mints Two Billionaires, and Signals AI Chip Wave

AI chipmaker Cerebras made a stunning Nasdaq debut on Thursday, with shares surging 68% on the first day of trading and pushing the company's market cap close to $100 billion. The IPO raised $5.55 billion — the largest of the year — a remarkable turnaround for a company that pulled its IPO filing just seven months ago and instead raised private capital at a $23.1 billion valuation in February 2026.

The listing minted two new tech billionaires: CEO Andrew Feldman, whose roughly 5.5% stake is now worth $3.2 billion, and CTO Sean Lie, whose nearly 3% holding is valued at $1.7 billion. Feldman previously co-founded microserver maker SeaMicro, which AMD acquired in 2012 for $334 million — a very different scale of outcome. Early investors are the other big winners: Benchmark, which co-led the 2016 Series A, now holds shares worth $5.5 billion, while Foundation Capital's stake is valued at $4.8 billion.

The IPO also delivered modest but notable windfalls to some high-profile angels. OpenAI co-founders Sam Altman and Greg Brockman were early Cerebras backers; their stakes are now worth $27.8 million and $24.2 million, respectively. Intel CEO Lip-Bu Tan was also an early investor. The OpenAI connection runs deeper than equity — the two companies struck a $20 billion multi-year computing deal in early 2026, with Cerebras supplying inference infrastructure, the layer of AI systems that handles live user interactions.

Cerebras' core product, its Wafer Scale Engine 3 chip, is positioned as a direct Nvidia rival, with the company claiming superior speed for inference workloads. The broader market backdrop has been favorable: shares of Intel, AMD, and Micron have all rallied on surging AI chip demand, creating tailwinds for the IPO. Still, the venture capital community is quick to note the rarity of the outcome — total U.S. venture-backed exit value, while more than doubling last year to $217.1 billion, remains less than a third of the 2021 peak of $790.7 billion.

As large as the Cerebras IPO is, it may look modest compared to what's coming. SpaceX, OpenAI, and Anthropic are all approaching or exceeding trillion-dollar private valuations, and any one of their eventual public listings would dwarf Thursday's debut by an order of magnitude.