Cerebras IPO priced at $185, opened at $350 — 89% Day-1 pop, fully-diluted market cap crosses $106B, largest US IPO of 2026
Cerebras Systems priced its IPO at $185 per share on May 13, raising $5.55 billion. The stock opened at approximately $350 on the Nasdaq the next day — an 89% pop — with fully-diluted market cap crossing $106 billion. It is the largest US IPO of 2026 by a wide margin and the public-market test for AI infrastructure pricing.
The unit economics in the S-1 are what made the pricing land. Llama 3.1 70B runs at approximately 2,100 tokens per second on a single CS-3, compared to roughly 100-150 tokens per second on a single H100 — a 10-20× speed differential at the inference workload that's becoming the dominant cost line in frontier-AI deployment. Cerebras claims its wafer-scale architecture delivers inference speeds up to 15× faster on common open-source models, using significantly less power per unit of compute. Those are the numbers that justified the IPO valuation despite NVIDIA still holding ~80% market share.
The capital event also unlocks the next phase of customer commitments. OpenAI is using Cerebras chips for ChatGPT inference workloads via a $20 billion / 750-megawatt agreement disclosed earlier in 2026. AWS has now deployed CS-3 inside its data centers (see today's other compute card). The post-IPO Cerebras has cash to scale wafer manufacturing capacity by 3-4× over the next 18 months — which is the supply-side answer to the demand explosion Goldman Sachs forecast at 24× token consumption by 2030. The OpenAI-Cerebras-AWS triangle is the public-market validated alternative to the OpenAI-Microsoft-NVIDIA path that has dominated since 2023.
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