SiFive, the RISC-V chip IP firm founded by the Berkeley engineers who created the open-source instruction set architecture, has raised $400 million in an oversubscribed Series G on April 9, 2026 at a valuation of $3.65 billion. The round was led by Atreides Management and was also supported by Nvidia, Apollo Global Management, D1 Capital Partners, Point72 Turion, T. Rowe Price Investment Management, Prosperity7 Ventures, and Sutter Hill Ventures. This is the company's final private funding round before an initial public offering. Unlike other companies like Arm Holdings and Intel, SiFive is free to implement, extend, and commercialise without per-unit royalties or usage restrictions. SiFive was founded in 2015 by three of the project’s principal architects: Krste Asanović, Andrew Waterman, and Yunsup Lee.