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OpenAI Founders Among the Early Winners

The Cerebras investor list reads like a who's-who of the AI era's founding generation. OpenAI co-founders Sam Altman and Greg Brockman were among the company's early backers — as was Intel CEO Lip-Bu Tan. Altman's shares are now worth $27.8 million; Brockman's stake has reached $24.2 million — and neither has had to wait for their own company's IPO to see returns.

The Cerebras-OpenAI relationship runs deeper than shared investors. In early 2026, the two companies struck a $20 billion multi-year agreement for computing capacity and related services — a deal that anchors Cerebras firmly in the supply chain powering the world's most prominent AI systems.

The Chip at the Center of It All

What Cerebras sells is not merely faster hardware — it is a reimagining of what AI chips can be. The company's flagship Wafer Scale Engine 3 is engineered for inference, the computationally intensive process by which AI models generate responses in real time for end users. Cerebras claims its WSE-3 chips outrun Nvidia's dominant GPUs on inference tasks — a bold assertion in a market where Nvidia has long held near-monopoly authority.

Beyond chips, Cerebras offers a full-stack AI infrastructure portfolio encompassing data centers and a proprietary cloud platform, positioning it as an end-to-end competitor in the infrastructure layer that the AI economy runs on.

Feldman previously co-founded and led SeaMicro, a microserver company acquired by AMD in 2012 for approximately $334 million — a respectable exit that now looks modest compared to what Thursday delivered. His current Cerebras stake of roughly 10.3 million shares represents about 5.5% of the company; Lie holds close to 3%.

The Horizon: SpaceX, OpenAI, Anthropic

As staggering as the Cerebras IPO appears by conventional measures, it may soon be dwarfed by what is coming. SpaceX, OpenAI, and Anthropic — each hovering at or near trillion-dollar private market valuations — are all reportedly advancing toward public offerings of their own, buoyed by insatiable global demand for AI models, services, and the infrastructure that sustains them.

"It's been a long, very interesting road — lots of technology and innovation and many white-knuckle moments," said Steve Vassallo, a Foundation Capital partner and Cerebras board member. "Today is yet another example of that."

For now, the road has arrived at a $100 billion destination. And if the AI boom continues to accelerate at its current pace, Thursday's record may not hold that title for long.