Every fusion startup that has raised over $100M
Fusion startups have raised $7.1 billion to date, with the majority of it going to a handful of companies.
Several fusion startups have garnered over $100 million in private investment capital in recent years, marking a significant shift in the industry's fortunes. Commonwealth Fusion Systems (CFS) has been at the forefront, amassing $3.94 billion in total funding, including a recent $1 billion infusion in July that propelled it to the top spot among fusion companies as of 2023.
CFS is constructing Sparc, a prototype plant in Massachusetts expected to reach scientific breakeven by 2027, after which it plans to build a commercial power plant capable of generating 400 megawatts of electricity.
Helion, based in Washington, is also making headlines with its aggressive timeline, aiming to bring electricity generation online by 2028. Utilizing a field-reversed configuration reactor, Helion has already raised $3.2 billion in committed capital, including a recent $465 million Series G round that valued the company at $15.5 billion. The company secured a significant early customer in Microsoft, which will be its first commercial user of the fusion technology.
TAE Technologies, formerly Tri Alpha Energy, has also attracted substantial investment. The company, which merged with Trump Media & Technology Group in December 2025, has raised $1.65 billion in total funding. TAE employs a different approach, using a field-reversed configuration with particle beams to maintain plasma stability and enhance fusion efficiency.
Pacific Fusion has raised an unprecedented $1 billion in its Series A round, showcasing the high level of interest in the sector. The startup plans to use inertial confinement fusion and has a long list of notable investors backing its ambitious plans.
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