SandboxAQ closes $450M Series E with new backing from Nvidia, Google and BNP Paribas at a $5.75B valuation
On 2025-04-04 SandboxAQ announced the close of a $450 million Series E round, expanded by an additional $150 million from new investors including Nvidia, Google and BNP Paribas, at a reported valuation of $5.75 billion. According to SandboxAQ, the raise brought total funding since its 2022 Alphabet spinout to more than $950 million. The company develops quantitative-AI ('AQ') models drawing on quantum-derived techniques and operates a post-quantum cryptography / security line. Capital was earmarked for its enterprise quantitative-AI platforms.
A $150M strategic top-up from Nvidia and Google into a quantum-adjacent name signals continued large-cap appetite for quantum-and-AI exposure; at a $5.75B valuation this is among the larger private quantum-sector rounds of early 2025.
Nvidia and Google taking direct equity positions tightens the coupling between GPU/cloud incumbents and quantum-derived software, and may pressure pure-play valuations and partnership terms across the sector.