Priced at $185, above the marketed range, the wafer-scale chip company opens trading on Thursday at a $56.4bn valuation. The OpenAI deal is what got the book covered. The customer concentration footnote is what the next quarter has to answer.
Cerebras Systems priced its IPO at $185 per share on Wednesday evening, above the marketed range, raising $5.55bn and resulting in a fully diluted valuation of $56.4bn. It is the largest US tech IPO since Snowflake’s $3.8bn debut in 2020, and the largest of 2026 by a wide margin.
The shares begin trading on Nasdaq on Thursday under the ticker CBRS.
The pricing is a long way from where the company started this run. Cerebras filed confidentially in late February, refiled in April at a $26.6bn valuation targeting $3.5bn, raised the range to $4.8bn last week, and ended up here. The bookbuild, in plain English, did not need a second nudge.
Cerebras designs the Wafer Scale Engine, a single piece of silicon the size of a dinner plate that holds more than four trillion transistors. The pitch to investors is inference, not training: the workload where AI models run rather than learn, and where speed and unit cost matter more than raw compute.
