SiFive raises $400M with Nvidia tie

SiFive just pulled in a $400 million funding round, and Nvidia is one of the investors backing it. SiFive said the round was oversubscribed and put the company’s valuation at $3.65 billion on April 9, 2026. (sifive.com) The money is aimed at one specific target: data-center processors for artificial intelligence systems. Reuters reported SiFive wants a bigger foothold in central processor chips for the servers that run AI workloads. (reuters.com) SiFive does not manufacture chips itself. It sells processor blueprints, which lets other companies build their own chips the way a homebuilder works from an architect’s plan instead of starting from raw concrete and steel. (sifive.com) Those blueprints are built on RISC-V, pronounced “risk five,” which is an open standard instruction set architecture. RISC-V International describes that architecture as the basic rulebook for how software talks to a processor, and the open-standard part means companies can use it without being locked to a single owner. (riscv.org) That is the opening SiFive has been chasing since its founding in 2015 by creators of the RISC-V project from the University of California, Berkeley. The company’s pitch has long been that a customer can license a ready-made core from SiFive and then tune it for a car, a phone, an industrial machine, or now an AI server. (electronicdesign.com) (sifive.com) Nvidia’s name in this round matters because Nvidia sells the graphics processors that dominate AI training, but those systems still need central processors to feed data, manage memory, and run the rest of the server. SiFive said this financing will accelerate its central processor and AI intellectual property for the data center. (nvidianews.nvidia.com) (sifive.com) SiFive has already been building pieces for that job. In 2024 it introduced the Performance P870-D, a high-performance RISC-V processor for infrastructure chips, and said it was designed for demanding AI workloads with better compute density and performance per watt. (businesswire.com) It has also been pushing AI cores for smaller devices that run models closer to the user instead of inside a giant cloud campus. SiFive’s Intelligence X280 Gen 2 is marketed for edge artificial intelligence and includes a 512-bit vector engine, which is a wide math lane for handling many pieces of data in parallel. (sifive.com) The investor list shows this was not just a symbolic check from one strategic partner. SiFive said Atreides Management led the round, with Apollo Global Management, Nvidia, Point72 Turion, T. Rowe Price Investment Management, Prosperity7 Ventures, and Sutter Hill Ventures also participating. (sifive.com) The valuation jump is part of the story too. SiFive’s 2022 Series F round was $175 million at a valuation above $2.5 billion, so this new round lifts the paper value by more than $1 billion while the company tries to move from embedded designs into the much harder data-center market. (reuters.com) (wikipedia.org) What investors are really buying is a bet that AI hardware will not stay a one-chip show. If cloud companies and device makers want custom processors around Nvidia systems, an open-standard central processor design house with fresh cash and a strategic Nvidia tie suddenly looks a lot more useful. (riscv.org) (sifive.com)