Nebius (NL) acquired Eigen AI (US), a US-based startup specializing in enhancing open-source artificial intelligence model performance during inference, for $643 million. The deal was announced on May 1, 2026, although no specific closing date was disclosed.
Transaction overview
European technology company Nebius acquired San Francisco-based Eigen AI for approximately $643 million in cash and stock. This transaction positions Nebius to integrate Eigen AI's expertise into its Nebius Token Factory platform, enhancing the performance of leading open-source artificial intelligence models from companies like Meta, OpenAI, and Alibaba.
Deal structure and financing
Details on the exact equity-debt split, lead banks involved, leverage metrics, seller-retained stake, lock-up terms, and IPO optionality were not disclosed in publicly available information. The acquisition aims to bring together Nebius's AI infrastructure expertise with Eigen AI’s elite inference research talent, specifically focusing on optimizing data processing efficiency.
Strategic context
Nebius sought to strengthen its position in the growing artificial intelligence market by acquiring Eigen AI, which specializes in improving AI model performance during inference. This strategic move is expected to enhance Nebius' capabilities in delivering more efficient and cost-effective solutions for enterprise customers. Conversely, Eigen AI's rationale likely involves seeking a larger platform that can scale its technology and research efforts internationally.
Regulatory path
No specific regulatory review or approval timelines were disclosed. Given the deal size and the cross-border nature of the acquisition (from the US to the Netherlands), regulatory scrutiny is possible from bodies such as the Committee on Foreign Investment in the United States (CFIUS) or European Union competition regulators if operations extend into EU member states.