Positron raises $875 million to tape out inference silicon

Positron AI said it raised $875 million in Series C financing at a $5 billion post-money valuation to tape out its Asimov inference chip late in 2026.

A confirmed inference-chip raise at a $5 billion valuation is a financing event. The architecture pitch is the company’s.

Positron AI said it raised $875 million in Series C financing — a late private funding round — at a $5 billion post-money valuation. That means the company was valued at five billion dollars after the new money. The release carried a Reno dateline on PR Newswire.

The company said the round was co-led by NEA, Atreides Management, Valor Equity Partners, Andra Capital, Dylan Patel’s SemiAnalysis Capital, and Jim Clark.

Positron: the raise funds tape-out of Asimov — sending the chip design to the factory — on TSMC N3P, a 3-nanometer-class process, at the end of 2026. Production is slated for the second half of 2027, then the Titan system ramp. It claims 288 GB to 2,304 GB of memory per Asimov chip — 288 to 2,304 gigabytes on the package. It says it will use LPDDR5X, a type of low-power memory, instead of HBM (high-bandwidth memory), the stacked memory used on many AI accelerators.

The release says more than 50 racks of first-generation Atlas are deployed at Oracle Cloud Infrastructure, with additional Atlas customers including Jump Trading and i3d.net. Those are company claims.

Reuters the same day: the startup had raised $230 million in February at a $1.06 billion valuation, per PitchBook. Reuters described the new money as two tranches — $375 million Series C and a Series C-1 of up to $500 million — which add to the $875 million headline if both close.