Inertia Enterprises raised $450M Series A led by Bessemer and GV to commercialize fusion energy based on proven NIF ignition science in Livermore, CA.
Inertia Enterprises raised $450 million in Series A funding in February 2026, led by Bessemer Venture Partners with participation from GV (Google Ventures), Modern Capital, and Threshold Ventures. The Livermore, California-based company is commercializing inertial confinement fusion, building on proven science from the National Ignition Facility. The company was co-founded by a Twilio co-founder.
This company has completed 1 funding round. Current round is highlighted.
Total Raised
$450M
Top Valuation
-
Inertia Enterprises raised $450 million in a Series A funding round.
Bessemer Venture Partners led the round, with participation from GV (Google Ventures), Modern Capital, and Threshold Ventures.
Inertia is commercializing inertial confinement fusion energy, building on proven science from the National Ignition Facility in Livermore, California.
ICF uses powerful lasers to compress and heat fuel pellets until they undergo nuclear fusion. It is the only fusion approach that has achieved ignition, producing more energy than was delivered by the lasers.
Inertia Enterprises is based in Livermore, California, near the National Ignition Facility.
Inertia Enterprises, a fusion energy startup based in Livermore, California, raised $450 million in Series A funding in February 2026. The company is working to commercialize inertial confinement fusion (ICF), the only fusion approach that has achieved ignition.
The round was led by Bessemer Venture Partners, with participation from GV (Google Ventures), Modern Capital, Threshold Ventures, and others. The large Series A reflects growing investor confidence in fusion energy commercialization.
Inertia builds on the proven science of the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory, where researchers achieved fusion ignition in December 2022, producing more energy than the lasers delivered. The company aims to translate this breakthrough into a commercial power plant.
Fusion energy has attracted billions in private investment as the world seeks clean, abundant power sources. Inertia stands out by pursuing the only fusion approach with demonstrated ignition, rather than experimental designs. The company was co-founded by a Twilio co-founder, bringing significant entrepreneurial experience to the deep-tech venture.