SiFive, a Santa Clara, California, company that licenses processor designs based on the open RISC-V standard, said on 9 April 2026 that it had raised $400m in an oversubscribed Series G round at a valuation of $3.65bn.
Atreides Management led the round. New investors were Apollo Global Management, Nvidia, Point72 Turion and T. Rowe Price Investment Management, and existing investors Prosperity7 Ventures and Sutter Hill Ventures also took part. Reuters later corrected its report to remove D1 Capital Partners and Capital Group from the investor list after the company updated it. SiFive said the commitments may include money from funds and accounts managed by the named firms.
The valuation is up from $2.5bn at SiFive's Series F in 2022, when it raised $175m, according to Dealroom and The Next Web.
“SiFive is doubling down on the datacenter.”Patrick Little, Chairman and CEO, SiFive
What SiFive does
SiFive does not make chips. It sells processor blueprints, or intellectual property, that customers such as Alphabet's Google adapt for their own chip designs, Reuters reported. The company says its IP appears in more than 500 designs and that more than 10 billion cores based on it have shipped.
Krste Asanović, Andrew Waterman and Yunsup Lee founded the company in 2015, according to The Next Web. The three were principal architects of RISC-V, which was developed at the University of California, Berkeley, from 2010.
In 2021 Intel offered more than $2bn to buy SiFive, but the deal fell apart over valuation, The Next Web reported. Dealroom noted that SiFive cut about 20% of its staff in 2023. The company said it had record growth in 2025 but did not disclose revenue or headcount.
What the money is for
SiFive said it would spend the money on research and development of high-performance scalar, vector and matrix RISC-V CPUs, accelerators and system IP, and on data-centre software, building on existing ports of CUDA, Red Hat and Ubuntu. It also plans to grow its engineering teams worldwide and to work more closely with customers and partners, including through Nvidia's NVLink Fusion technology.
Chief executive Patrick Little told Reuters the company was going after the data-centre market, and that the plan is to design a central processor for data centres.
Gavin Baker, managing partner and chief investment officer of Atreides, said in the release that SiFive was well placed to benefit from the shift towards RISC-V. Analysts quoted in the release, from The Futurum Group and HotTech Vision and Analysis, said interest in CPUs for data centres was rising and that the industry's view of RISC-V was starting to change.
Competing with Arm
For decades Arm Holdings dominated the business of licensing chip blueprints. Arm has since unveiled chips of its own, which makes it a potential competitor to many of its long-standing customers, and Little said this gave SiFive a chance to win new business, Reuters reported. The Next Web reported that Arm's first in-house processor, launched in March 2026, counts Meta and OpenAI as early customers.
Little told Reuters he expected the Series G to be SiFive's last funding round before it files for an initial public offering. He did not give a timeline.
Company website: sifive.com