SiFive raises $400M

SiFive just pulled in a $400 million funding round at a $3.65 billion valuation, and the list of backers included Nvidia, Apollo, Point72 Turion, T. Rowe Price, Prosperity7, and Sutter Hill. The company said on April 9 that the round was oversubscribed, which means investors wanted more shares than were available. (sifive.com) This is not a company that manufactures giant chip factories. SiFive sells processor designs and intellectual property, which other chip companies license and build into their own silicon. (sifive.com) The thing SiFive is betting on is called Reduced Instruction Set Computing Five, or RISC-V. RISC-V International describes it as an open standard instruction set architecture, which is the basic rulebook that tells software how to talk to a processor. (riscv.org) An instruction set architecture is like the grammar of a language. Arm says its own architecture is the contract between hardware and software, and RISC-V offers a similar contract without one company owning the rulebook. (arm.com) That open rulebook is why RISC-V keeps getting attention. A chip company can build around the standard and customize the processor design, instead of depending entirely on a proprietary architecture controlled by a single vendor. (riscv.org) (arm.com) SiFive matters here because it was founded in 2015 by the University of California, Berkeley engineers who helped create RISC-V, and it has turned that academic project into a commercial business with more than 400 design wins and over 2 billion devices shipped using its intellectual property. (sifive.com) (techcrunch.com) For years, most of the RISC-V story lived in smaller chips, where companies wanted low cost and flexibility for things like controllers and embedded systems. SiFive is using this new money to push much higher up the stack into data center processors and artificial intelligence infrastructure. (sifive.com) (reuters.com) That Nvidia name is the part rivals will notice first. In January, SiFive said its platforms would support Nvidia NVLink Fusion, which is Nvidia’s high-bandwidth connection technology for tying processors and accelerators together inside artificial intelligence servers. (morningstar.com) Nvidia already sells Arm-based central processors, so this is not a simple replacement story. It looks more like Nvidia wants another processor option for customers building custom artificial intelligence systems around its graphics processors and interconnects. (morningstar.com) (reuters.com) SiFive also said this is its final private fundraise before an initial public offering, and The Next Web reported the company is targeting a public listing in the second half of 2026. A round this size, with public-market style investors and a named data-center roadmap, looks a lot less like a lab experiment and a lot more like a company trying to become infrastructure. (thenextweb.com) (sifive.com)