SiFive raises $400M in final pre-IPO funding round

On April 9, 2026, SiFive secured a massive $400 million in its Series G funding round, a final step before a planned initial public offering. The investment, led by Atreides Management and backed by a powerful consortium including Nvidia and Apollo Global Management, values the RISC-V chip IP company at $3.65 billion. CEO Patrick Little confirmed this as the firm’s last private capital raise, setting the stage for a public market debut. This substantial influx of capital underscores the surging commercial demand for open-standard, customizable processor technology as the AI infrastructure race intensifies.

The company’s foundation is the open-source instruction set architecture known as RISC-V, created at UC Berkeley. Unlike proprietary architectures from Arm or Intel, RISC-V is freely available for implementation and commercialization without royalties. SiFive, founded in 2015 by key architects of the RISC-V project, operates on a licensing model similar to Arm’s, designing CPU intellectual property for clients to integrate into their own chips. The pivotal distinction is its commitment to an architecture owned by no single corporation, a position of architectural independence that has gained immense strategic value.

This value was highlighted in March 2026 when Arm, a long-neutral IP licensor, launched its own AGI CPU hardware, creating a direct conflict with its licensees. This move has driven technology buyers to seek alternatives free from proprietary control, boosting the appeal of RISC-V. Intel previously attempted to enter this space by trying to acquire SiFive in 2021, but the deal fell apart. Intel has since pivoted, joining Elon Musk’s Terafab as a foundry partner, effectively leaving the RISC-V IP licensing field open for SiFive to dominate without Intel as a potential acquirer or direct rival.

The Series G round attracted a notable mix of financial and strategic investors. Led by Atreides Management, the oversubscribed round included new participants like Nvidia, Apollo Global Management, and T. Rowe Price, alongside existing backers. Nvidia’s investment is particularly significant, following a January 2026 announcement that SiFive is integrating Nvidia’s NVLink Fusion technology. This enables RISC-V CPUs to connect directly to Nvidia GPUs, optimizing them for large-scale AI inference and positioning them to complement Nvidia’s next-generation Vera Rubin platform.

This funding arrives amid a massive surge in demand for custom silicon. Amazon recently committed $50 billion to its in-house Trainium chip program, while Google and Anthropic have partnered with Broadcom on custom AI compute solutions. In this landscape, SiFive offers hyperscale customers a compelling third path: highly customizable, independent CPU IP built on an open standard. “Hyperscale customers have made it very clear that it is time to accelerate the availability of open standard alternatives for the data centre,” Little stated, noting their demand for IP they can tailor to differentiate their computing solutions.

The new capital will be deployed across three key areas. The largest portion is dedicated to advanced R&D, expanding the roadmap for high-performance RISC-V CPU and accelerator IP for data centers. A second allocation will fund software ecosystem development, including porting critical platforms like CUDA and enterprise Linux distributions to RISC-V to ensure production readiness. The third focus is customer enablement, providing direct engineering support to help hyperscalers and system vendors integrate SiFive IP into their custom silicon programs. Little emphasized that the collaborative, community-driven nature of the RISC-V standard ensures long-term choice and flexibility for customers, an advantage that grows as competitors like Arm move into selling their own hardware.

SiFive is entering this next phase from a position of strong momentum, reporting that its IP is now in over 500 designs with more than 10 billion RISC-V cores shipped to date across various sectors. The company sees the data center, fueled by agentic AI infrastructure spending, as a potential $100 billion-plus market. By declaring this its final private round, SiFive is signaling its readiness for the institutional scrutiny of a public listing. With a $3.65 billion valuation and a premier investor roster, the company is positioned at the center of a transformative market shift it has been building toward for a decade.