Type One Energy's lean fusion plan lands $200M and a 2034 grid deadline

Type One Energy, a Knoxville, Tennessee-based startup founded in 2019 to build fusion power plants, announced Tuesday that it has raised $200M. The Series B was led by repeat investor Breakthrough Energy Ventures and Clutterbuck Capital, with participation from Lowercarbon Capital, Siemens Energy Ventures, and SiteGround Capital. The company previously raised $82.5 million in an extended Series A.

CEO Christofer Mowry told TechCrunch that the new round should get Type One halfway to paying for a 400-megawatt commercial power plant. If the company can bring that plant online by 2034, he said, it could complete its first power plant using less capital than many of its competitors — even allowing for one or more subsequent rounds of funding.

The differentiator, per Mowry, is the business model rather than the reactor alone. Type One will design the power plant and many of its components, then hand fabrication to a "bespoke" network of suppliers chosen for the project. Most fusion startups rely on outside suppliers for some components; Type One plans to go further.

That approach keeps costs down. "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, referring to companies that make most of their own parts in-house. "Why would I want to spend on bricks and mortar?" he added. "I used to run a big nuclear manufacturing company. That's expensive."

Partners are already lining up. Type One will build its first two fusion devices on the Tennessee Valley Authority's Bull Run site, and infrastructure consultant AECOM is working on engineering for Infinity Two, the initial commercial power plant. Competitor Commonwealth Fusion Systems has licensed its high-temperature superconducting magnet technology to Type One, which will help form the backbone of the reactor design.

Going supplier-heavy makes Type One an integrator — a company that assembles a product from parts made by others. That minimizes its own manufacturing risk while introducing a different kind. The upside, Mowry argues, is access to partners with deeper expertise. "They have 10,000 people, most of them are engineers of one kind. We're never going to have 10,000 people," he said of AECOM.

The downside is weaker control over suppliers. The most prominent recent cautionary tale is Boeing, which relied on Spirit AeroSystems for fuselage sections on the 737 and 787 and later bought the supplier back in-house after quality-control failures, including a door plug blowing out on an Alaska Airlines flight in 2024.

Type One is betting integration risk is lower than the risk of doing everything in house. "These business models are successful because they let companies focus on managing risk and developing a high level of competency in their slice of the value chain," Mowry said.