Series B · Climate tech

Type One Energy raises $200m Series B for fusion development

Breakthrough Energy Ventures and Clutterbuck Capital co-led the round supporting FusionDirect technology and Project Infinity in Tennessee.

Type One Energy closed a $200 million Series B on October 6, co-led by Breakthrough Energy Ventures and Clutterbuck Capital. Lowercarbon Capital, Siemens Energy Ventures and SiteGround Capital joined the round.

The funding supports the company’s FusionDirect development program and engineering work on Project Infinity at TVA’s Bull Run site. That project includes the Infinity One prototype and the planned 400-megawatt Infinity Two fusion power plant.

The financing follows Tennessee’s initial operating license for Project Infinity. Type One Energy is combining its stellarator technology with manufacturing and engineering partners, aiming to use established industrial infrastructure to reduce the cost and time needed to develop commercial plants.

Use of funds

Develop FusionDirect stellarator technology

Advance Project Infinity engineering and design

Build industrial partnerships

Funding history

Series B · This round$200M
Seed (final close)$82.4M

Sources

  1. Type One Energy completes $200m Series Btypeoneenergy.com · Oct 6, 2026