VC-Funded Fusion Energy Companies
“The fastest way to deploy fusion and I believe one of my forecasts is we will replace every coal and natural gas plant in this country by just repowering the boiler. So we’ll have a fusion boiler.” Vinod Koshla
Fusion start at 22:02
The fusion energy sector has seen a surge in venture capital investment, with several companies raising hundreds of millions to billions of dollars. These firms are pursuing diverse reactor designs and timelines, backed by major investors including Bill Gates, Sam Altman, Peter Thiel, Google, Microsoft, and Breakthrough Energy Ventures.
1. Commonwealth Fusion Systems (CFS) – ~$3B total funding
Massachusetts-based CFS has raised about a third of all private fusion capital to date. Its latest $863M Series B2 round brings total funding near $3B. CFS is building SPARC, a compact tokamak using high-temperature superconducting magnets, aiming for late 2026–early 2027 operation. Its commercial plant ARC will produce 400 MW near Richmond, VA, with Google already purchasing half its output TechCrunch+1.
2. Helion Energy – $1.5B total funding
Everett, WA-based Helion uses a field-reversed configuration (FRC) reactor where two plasma “doughnuts” collide at over 1 million mph. It plans to deliver electricity by 2028, with Microsoft as its first customer. Its latest $465M Series G round (led by Thrive Capital) brings total funding to $1.5B thefusionreport.com+2.
3. TAE Technologies – $1.5B total funding
Pursuing hydrogen-boron (p-B11) fusion for a clean, radiation-free fuel cycle, TAE uses an Advanced Beam-Driven Field-Reversed Configuration design. Its compact, linear reactor is designed for scalability and mass manufacturing Energy Startups.
4. SHINE Technologies – $1B total funding
Develops fusion technology for industrial inspection, medical isotope production, and electricity generation. Its approach combines fusion energy with industrial applications Energy Startups.
5. Pacific Fusion – $900M total funding
Focuses on pulsed magnetic fusion by rapidly compressing fuel with high-current magnetic fields. The company is advancing toward high-gain fusion systems Energy Startups.
6. General Fusion – $22M funding
Uses magnetized target fusion with liquid metal walls. Plans to reach scientific breakeven by 2026 thefusionreport.com.
7. Tokamak Energy – $1.2B total funding
UK-based, developing compact tokamaks with high-temperature superconducting magnets, aiming for commercial deployment in the 2030s thefusionreport.com.
8. Zap Energy – $1.1B total funding
Pursues compact tokamaks with high-temperature superconducting magnets, targeting rapid prototyping and deployment thefusionreport.com.
9. First Light Fusion – $1.1B total funding
Uses projectile-based inertial confinement to compress fusion fuel, aiming for a first electricity generation by 2030 thefusionreport.com.
10. Helion Energy (again noted) – $1.5B total funding
Already listed above, Helion is the second most funded fusion company after CFS thefusionreport.com.
Investor Landscape
Backers include Breakthrough Energy Ventures (Bill Gates), Google, Microsoft, Sam Altman, Reid Hoffman, Peter Thiel’s Mithril Capital, Thrive Capital, and climate-focused funds like Footprint Coalition
