Type One Energy raises $200M for 2034 fusion plant

Type One Energy, a fusion-power startup based in Knoxville, Tennessee, said Tuesday it has raised $200 million from investors in a Series B round, pushing it further up the ranks of the best-funded fusion companies.

Fusion remains an expensive field: it sits at the intersection of plasma physics, materials science and advanced computation, where even $200 million doesn’t always go far. Still, the new round should get Type One halfway to paying for a 400-megawatt commercial power plant, CEO Christofer Mowry told TechCrunch. If the company can bring that plant online by 2034, he added, it could end up spending less capital than many of its competitors to reach a first commercial plant, even accounting for additional funding rounds along the way.

The round was led by repeat investor Breakthrough Energy Ventures and Clutterbuck Capital, with Lowercarbon Capital, Siemens Energy Ventures and SiteGround Capital also participating. Type One had previously raised $82.5 million in an extended Series A.

Mowry said the company’s edge is its business model. Type One designs the power plant and most of its components itself, then hands construction to a “bespoke” network of suppliers selected for each project — a deeper reliance on outside suppliers than most fusion rivals, which tend to keep at least some manufacturing in-house.

“The amount of capital that we need to raise to commercialize fusion at Type One is just a different order of magnitude than if you were going to be vertically integrated,” Mowry said.

That approach — known as being an integrator — keeps costs down and gives Type One access to partners with deeper expertise, like infrastructure consultant AECOM, which is handling engineering for Infinity Two, the company’s planned first commercial plant. Type One will build its first two fusion devices at the Tennessee Valley Authority’s Bull Run site, and it has licensed high-temperature superconducting magnet technology from competitor Commonwealth Fusion Systems for its reactor design.

The tradeoff is less control over suppliers than an in-house team would have. Boeing is the best-known recent example: after quality-control failures at supplier Spirit AeroSystems, including a door plug blowing out on an Alaska Airlines flight in 2024, Boeing bought the company outright to fix the problem. Type One is betting it can manage that integration risk better than it could manage the risk of building everything itself.

Why it matters

Type One’s bet on outside suppliers — rather than the vertical integration some fusion rivals favor — could let it reach a commercial plant with less capital, but it ties the startup’s timeline to partners it doesn’t control.