On September 30, 2026, Zenithon AI, a London-based AI start-up developing world models for extreme physics applications, including fusion energy, rocketry, and semiconductor manufacturing, announced a $10 million seed financing led by Backed VC, Lunar Ventures, Seraphim Space, MMC Ventures, and SOSV. Several angel investors also participated in the round. Wilson Sonsini Goodrich & Rosati advised Zenithon AI on the transaction.

Zenithon AI intends to allocate the funding to release new models and to grow its teams in London and San Francisco.

The Wilson Sonsini team that advised Zenithon AI on the transaction included Bradley Doline, Betty Rosenbaum, and Cliff Gilman.

For more information, please see Zenithon AI’s LinkedIn post. Additional coverage can be found on Dealroom and Tech Funding News.