Fusion startups that have raised over $100M: A comprehensive list
Original: Every fusion startup that has raised over $100M
Why This Matters
Fusion energy investment surpassing $100M per startup signals the sector's shift from research curiosity to commercial competition.
TechCrunch and FusionX data reveal multiple fusion energy startups surpassing $100M in private funding, led by Commonwealth Fusion Systems at $3.94B total raised. Advances in AI, computing, and high-temperature superconducting magnets are accelerating the sector.
According to data provided by FusionX to TechCrunch, the private fusion energy sector has seen a rapid influx of capital, with several startups surpassing $100 million in committed funding. Leading the field is Commonwealth Fusion Systems (CFS), which has raised approximately $3.94 billion to date — about one-third of all private capital invested in fusion companies globally. Its most recent $1 billion round closed in July 2026. CFS is currently building Sparc, a tokamak-design reactor in Massachusetts that uses high-temperature superconducting magnets co-developed with MIT. The company targets scientific breakeven (Q > 1) in 2027 and expects Sparc to be operational in late 2026 or early 2027. Its follow-on commercial plant, Arc, is planned for construction near Richmond, Virginia, targeting 400 megawatts of electricity output, with Google contracted to purchase half its power. The broader fusion investment wave has been driven by three key technological advances: more powerful computing chips, more sophisticated AI, and high-temperature superconducting magnets. A further catalyst came in late 2022, when the U.S. Department of Energy's National Ignition Facility announced a controlled fusion reaction that achieved scientific breakeven — the first such milestone — validating the underlying physics and accelerating investor confidence.