Inertia Enterprises Secures $450 Million to Turn Lab Fusion Breakthrough into Commercial Power

Inertia Enterprises, a fusion energy startup, has closed a $450 million Series A funding round to construct a powerful new laser system. The company aims to use this technology as the core of a full-scale power plant, with construction slated to begin before the end of the decade.

The round was led by Bessemer Venture Partners, with significant investment from GV (Alphabet's venture arm), Modern Capital, and Threshold Ventures. Inertia's founding team brings together notable figures from technology and science: Jeff Lawson, co-founder and CEO of communications giant Twilio; Dr. Annie Kritcher, the physicist who led the landmark fusion experiments at the Lawrence Livermore National Laboratory; and Stanford professor Mike Dunne, who helped translate Livermore's research into a practical power plant design. Kritcher will maintain her role at the national lab while contributing to Inertia.

Inertia's approach is based directly on the inertial confinement fusion proven at Livermore's National Ignition Facility (NIF), the only site to achieve a controlled fusion reaction that produces more energy than it consumes. The startup's challenge is to transform that monumental scientific achievement into an economical, reliable source of electricity.

To do so, Inertia must engineer a laser that can fire 10 kilojoules of energy ten times every second. Their commercial reactor design calls for an array of one thousand such lasers, each striking a mass-produced fuel target costing less than a dollar. This stands in stark contrast to NIF's 192 lasers, which fire on exquisitely handcrafted targets. The startup's entire strategy hinges on applying manufacturing scalability and commercial engineering to the proven physics from Livermore.

This funding announcement is part of a wave of investment into fusion energy. In recent months, companies like Commonwealth Fusion Systems, Type One Energy, and Avalanche have collectively pulled in billions of dollars from private investors. The sector's momentum is also visible in public markets, with companies like General Fusion and TAE Technologies recently announcing plans to go public through mergers with special purpose acquisition companies.

Source: TechCrunch