Fusion energy has exploded from a distant dream into a funding powerhouse. As of June 2026, 17 fusion startups have each raised over $100 million, with total private investment exceeding $13 billion. No company has yet achieved commercial-scale energy generation, but investor confidence is surging thanks to advances in AI, powerful chips, and high-temperature superconducting magnets.
- Commonwealth Fusion Systems leads all fusion companies with nearly $3 billion in total funding, capturing about one-third of all private fusion investment. The company is building the SPARC tokamak, which is 75% complete.
- TAE Technologies follows with $1.79 billion in funding and has announced a planned all-stock merger with Trump Media & Technology Group valued at over $6 billion.
- Helion Energy has raised roughly $1 billion in equity plus up to $1.7 billion in milestone-linked commitments, targeting first electricity delivery by 2028 with Microsoft as its initial customer.
- Pacific Fusion kicked off with over $900 million in a milestone-structured Series A, led by former Human Genome Project director Eric Lander.
- Shine Technologies has accumulated over $1 billion while focusing on commercial neutron services and medical isotopes.
Other notable startups include Inertia Enterprises with $450 million, Focused Energy with $400 million after raising $240 million in June 2026, Zap Energy with $327 million planning a hybrid fusion-fission plant, Type One Energy with $269 million building on a retired coal plant site, Kyoto Fusioneering with $191 million supplying balance-of-plant components, Thea Energy with $130 million using pixel-inspired magnets for stellarators, First Light Fusion with $108 million using projectile-based inertial fusion, and Xcimer Energy with exactly $100 million pursuing laser-driven inertial confinement. Helion and Focused Energy closed massive rounds in June 2026 alone. Despite billions poured in, the industry still hasn’t reached commercial breakeven where a facility produces more energy than it consumes.
FAQs [Frequently Asked Questions]
Q1: How many fusion startups have raised over $100M?
17 fusion startups have each raised over $100 million, with total private investment crossing $13 billion as of June 2026.
Q2: Which fusion startup has the most funding?
Commonwealth Fusion Systems leads with ~$3 billion in total funding, capturing one-third of all private fusion investment.
Q3: Has any fusion startup achieved commercial energy yet?
No company has proven commercial-scale energy generation works; scientific breakeven was achieved in 2022, but commercial breakeven remains distant.