Nebius agrees to buy inference optimizer Eigen AI for about $643M

Nebius agreed to acquire Eigen AI, an inference and model-optimization firm, for about $643 million, subject to adjustments. The price is paid in a mix of cash and Nebius Class A shares and is set on the 30-day weighted average share price at signing. The deal is meant to strengthen Token Factory, the company's managed inference platform, and to add research talent and a Bay Area engineering presence.

• Value: about $643 million, subject to adjustments
• Payment: cash and Nebius Class A shares; split not disclosed
• Share price basis: 30-day weighted average at signing
• Target: Token Factory inference platform and research talent