Type One Energy

Energy · Fusion · Climate Tech

Funding

Type One Energy raises $200M Series B for fusion plant by 2034

Its reliance on outside suppliers instead of building hardware in-house aims to get a commercial reactor built for far less capital than rivals need.

• Type One Energy closed a $200 million Series B co-led by Breakthrough Energy Ventures and Clutterbuck Capital, pushing its total funding past $400 million.
• The Knoxville, Tennessee startup, founded in 2019, is building a stellarator-type fusion reactor and plans a 400-megawatt commercial plant at the Tennessee Valley Authority's Bull Run site.
• Rather than vertically integrating like many rivals, Type One designs the plant and components itself but outsources manufacturing to a bespoke supplier network, which CEO Christofer Mowry says sharply cuts the capital needed to commercialize fusion.
• Competitor Commonwealth Fusion Systems has licensed its high-temperature superconducting magnet technology to Type One, forming the backbone of its reactor, while AECOM handles engineering for the commercial plant.
• The $200 million gets Type One about halfway to funding its 400 MW plant, and PitchBook data cited by Reuters ranks it the third-biggest fusion-sector Series B of the past five years.
• If Type One's partner-built model holds up at Bull Run, it suggests fusion plants could reach the grid with a fraction of the capital rivals are spending on in-house manufacturing, reshaping how the sector scales.