Positron AI raised $875 million in Series C financing at a $5 billion post-money valuation, the Reno company said on September 10, 2026. The money is meant to tape out Asimov, its next inference chip, and to put Titan, the follow-on system, into production after a first generation already sitting in a public cloud.

The raise came in two pieces. A $375 million Series C at a $3.5 billion pre-money valuation was co-led by NEA, Andra Capital, Atreides Management, Valor Equity Partners, and Dylan Patel’s SemiAnalysis Capital. A Series C-1 of up to $500 million was led by NEA and Jim Clark, the Silicon Graphics and Netscape founder. Forest Baskett of NEA, Gavin Baker of Atreides, Thomas Jermoluk from the Jim Clark office, and Patel are joining the board.

Atlas in Oracle, Asimov on TSMC

Positron is deploying more than 50 racks of Atlas, its first inference system, at Oracle Cloud Infrastructure. Parasail is using that capacity for its own inference service. Jump Trading and i3d.net are named as additional Atlas customers.

The company designs around memory bandwidth and power rather than HBM supply. It said next-generation systems use more than 90 percent of available memory bandwidth and sit on commodity LPDDR5X, so they can go into air-cooled or liquid-cooled halls at different rack densities. Asimov is scheduled to tape out on TSMC N3P at the end of 2026, with production in the second half of 2027, and is specified at 288 GB to 2,304 GB of memory per chip. Titan packs four to eight Asimov chips into one node that Positron says can serve models beyond 16 trillion parameters and context windows beyond 10 million tokens.

“Deploying Atlas at scale taught us an enormous amount about what inference customers actually need, and we have carried those lessons directly into Asimov and Titan.” Mitesh Agrawal, CEO, Positron AI

Other backers named in the release include DFJ Growth, the Qatar Investment Authority, Resilience Reserve, Arena Private Wealth, Natural Capital, Helena, 1517 Fund, Flume Ventures, Unless, Boardman Bay Capital Management, Fincadia Advisors, Banyan Ventures, and U First Capital, plus strategic checks from VentureTech Alliance, Hudson River Trading, Cisco Investments, and Naver Ventures. Proceeds also cover a 2 MW-plus engineering data center and emulation platform, LPDDR5X supply, and go-to-market hiring.

Decoded Take

Training clusters still get the headlines. This round is a bet that the scarce parts of the next cycle are memory bandwidth, power, and a packaging line that is not CoWoS. Positron is selling an architecture that can ship into ordinary halls while Asimov is still a 2027 part. That only works if Atlas keeps earning tokens at Oracle and if TSMC N3P holds the tapeout date. Watch whether the 50-plus racks become a disclosed megawatt figure, and whether Titan’s first production customers are the same three names or a second cloud. If those proofs slip, $5 billion is a lot of equity for a company whose custom silicon has not left the fab.