The archive · Space, Robots, Defence · Technical decision · 2023–2026
Pacific Fusion bets pulsed-power z-pinch wins fusion; $900M Series A, module validated
Ex-LLNL team industrializes Sandia's Z-machine concept; 440 GW module milestone, $1B campus
Pacific Fusion
What the business is
Pulsed-magnetic inertial fusion startup building a 156-module demonstration system that fires synchronized terawatt-scale electrical pulses at deuterium-tritium fuel targets to reach net facility gain.
Starting capital：$900M+ Series A led by General Catalyst (Nov 2024/Mar 2025), milestone-based; $1B Albuquerque Research & Manufacturing Campus
How it started
Founded in 2023 in Fremont, California by Eric Lander (Human Genome Project leader), Keith LeChien (former pulsed magnetic fusion lead at LLNL and inertial confinement fusion director at NNSA), Will Regan, and former national-laboratory colleagues, betting that decades of US government investment in pulsed power could be converted into an affordable energy system.
What happened
Came out of stealth in November 2024 announcing a $900M+ Series A led by General Catalyst with backers including Bill Gates. By June 2026 the company said it had completed its second set of technical milestones, validating a roughly one-third-scale module that delivered ~440 GW peak power and ~1.1 MV in 80 nanoseconds — which it calls the highest-power single-step pulser module ever demonstrated — after more than 1,000 qualification shots. In August 2026 it broke ground on its $1B Research and Manufacturing Campus in Albuquerque, New Mexico, and signed an MoU with DOE's NNSA on pulsed-power and high-energy-density science.
How it ended up
Still scaling: full-scale pulser module targeted for late 2026, with the 156-module Demonstration System at Albuquerque aiming for net facility gain by 2030.
Background
Pacific Fusion's bet is that the fastest path to commercial fusion is not a new confinement concept but the industrialization of pulsed power: the technology behind Sandia National Laboratories' Z machine, proven over decades of government research. Founded in 2023 by Eric Lander, Keith LeChien, Will Regan and former national-laboratory colleagues, the Fremont, California company builds shipping-container-sized pulser modules from mass-manufacturable bricks of capacitors and switches, then fires them in synchronized bursts to magnetically squeeze deuterium-tritium fuel.
The strategy attracted the largest Series A ever for a private fusion company: over $900M, led by General Catalyst and backed by investors including Bill Gates, announced when the company exited stealth in November 2024. In June 2026 Pacific Fusion said it had validated a scaled prototype delivering ~440 GW peak power and ~1.1 MV in an 80-nanosecond pulse after more than 1,000 qualification shots, and that a production-scale module was on track for later that year.
In August 2026 the company broke ground on a $1B Research and Manufacturing Campus in Albuquerque, New Mexico, adjacent to national-security research infrastructure, and signed an MoU with DOE's NNSA covering pulsed-power technology, advanced materials and modeling. Its demonstration system of 156 modules is designed to exceed 100 megajoules per burst and is targeting net facility gain — more fusion energy out than stored in the machine — by 2030, as a stepping stone to commercial power plants.
What has to be true
- The founders came from LLNL and NNSA's inertial confinement programs, giving them first-hand access to decades of pulsed-power data and national-laboratory partnerships.
- Choosing proven pulsed-power physics over novel confinement concepts meant the main engineering risk was manufacturing scale, which the module design directly addresses.
- The $900M milestone-based Series A funded hardware iteration and a 200+ person team without diluting the company's focus on delivery dates.
- Positioning the module as a platform (also useful for x-ray, neutron and electromagnetic testing applications) creates revenue-adjacent uses while fusion scales.
What can be applied
A frontier-tech team can de-risk by betting on the boring, proven physics and making the breakthrough a manufacturing problem instead of a science problem.
Aftermath
As of September 2026, Pacific Fusion is executing its roadmap: the scaled pulser prototype is validated, the full-scale module is targeted for late 2026, the $1B Albuquerque campus broke ground in August 2026, and the company is scaling manufacturing at build centers in California and New Mexico. Net facility gain is targeted for 2030.
Sources
- Validating the next building block toward affordable fusion power
- Pacific Fusion breaks ground on New Mexico facility
- New nuclear fusion startup raises $900m in Series A funding
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