All the funding deals in the nuclear fusion market
Last updated: 13 July 2026
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The nuclear fusion market is attracting large investments across magnetic confinement, laser fusion, fusion materials, fuel systems, and specialized reactor components.
We conducted deep research and collected 50 nuclear fusion market funding deals announced between Q1 2024 and Q2 2026.
We refresh this page very often to include newly announced nuclear fusion market funding rounds.
Insights
- The nuclear fusion market raised at least $6.50 billion across the disclosed deals in this list. The true total is higher because three funding rounds did not disclose an amount.
- Only 16 nuclear fusion funding deals were worth at least $100 million, but these large rounds represented about 88% of all disclosed capital.
- Pacific Fusion, Commonwealth Fusion Systems, Neo Fusion, Helion Energy, and Inertia Enterprises received the five largest individual investments in the nuclear fusion market.
- The nuclear fusion market recorded $2.88 billion in disclosed funding during 2024, helped by very large rounds for Neo Fusion and Pacific Fusion.
- Disclosed nuclear fusion funding reached $1.79 billion in 2025. Commonwealth Fusion Systems alone represented almost half of that yearly total.
- The nuclear fusion market had already raised at least $1.83 billion during the first half of 2026, slightly more than the total recorded during all of 2025.
- Magnetic confinement technologies received funding across tokamaks, stellarators, magnetic mirrors, field-reversed configurations, and pulsed magnetic fusion systems.
- The nuclear fusion market is expanding beyond reactor developers. Investors also funded magnets, fuel processing, plasma heating, fusion materials, and beryllium production.
- China became an important source of large nuclear fusion funding rounds, with major investments in Neo Fusion, Startorus Fusion, NovaFusionX, and SunUp Fusion.
Summary table of the funding deals for the nuclear fusion market since 2024
We define the nuclear fusion market as technologies, components, and projects trying to generate commercial energy from nuclear fusion reactions.
It includes Magnetic Confinement Fusion, Inertial Fusion Systems, Fusion Fuel Supply, Superconducting Magnets, Fusion Materials, and Plasma Control Software.
It excludes broader adjacent markets unless the product is built specifically for this use case.
We focused exclusively on pure players, defined as companies with at least 70–80% of their business directly tied to the nuclear fusion market.
Our analysis has been done at a global level with a minimum funding threshold of $300k.
If you want a longer-term view, we also have a study of how funding activity in the nuclear fusion market has changed over the years.
| Name | What they do | Amount in $ | Quarter | Source(s) |
|---|---|---|---|---|
| SMART Fusion Energy | Develops tokamak reactor technology as a University of Seville spin-off. | $1.62M | Q2 2026 | Cinco Días |
| SunUp Fusion / Dongsheng Fusion | Develops compact, high-field fusion power systems using advanced fuel concepts. | $100.0M | Q2 2026 | DealStreetAsia |
| Helion Energy | Develops pulsed magnetic fusion systems designed to produce commercial electricity. | $465.0M | Q2 2026 | Helion Energy |
| Thea Energy | Builds scalable stellarator fusion plants with software-controlled magnetic systems. | $100.0M | Q2 2026 | Thea Energy |
| Focused Energy | Develops laser-driven inertial fusion systems and commercial fusion power plants. | $240.0M | Q2 2026 | Focused Energy |
| Beta Fusion | Develops pulsed field-reversed-configuration technology for controlled nuclear fusion. | Undisclosed | Q2 2026 | AASTOCKS |
| Startorus Fusion / Xinghuan Juneng | Develops compact spherical tokamaks using high-temperature superconducting magnets. | $69.4M | Q2 2026 | CNStock |
| First Light Fusion | Develops projectile-driven inertial fusion technology for commercial energy production. | $33.7M | Q2 2026 | First Light Fusion |
| NovaFusionX / Nova Fusion | Develops small modular fusion reactors using field-reversed-configuration technology. | $102.5M | Q2 2026 | Yicai Global |
| Beam for Fusion | Develops neutral particle beam systems that heat plasma inside fusion reactors. | $0.34M | Q1 2026 | The Bridge |
| Pranos Fusion | Builds and tests magnetic-confinement tokamak fusion systems in India. | $6.8M | Q1 2026 | Economic Times |
| MiRESSO | Develops beryllium production technology for nuclear fusion reactor materials. | $16.0M | Q1 2026 | MiRESSO |
| Inertia Enterprises | Commercializes large laser systems for inertial fusion energy production. | $450.0M | Q1 2026 | TechCrunch |
| Avalanche Energy | Develops small fusion devices based on the company’s compact Orbitron design. | $14.9M | Q1 2026 | GeekWire |
| Startorus Fusion / Xinghuan Juneng | Develops compact spherical tokamaks using high-temperature superconducting magnets. | $143.3M | Q1 2026 | SCMP |
| Type One Energy | Develops modular stellarator power plants with high-temperature superconducting magnets. | $87.0M | Q1 2026 | TechCrunch |
| SunUp Fusion / Dongsheng Fusion | Develops compact, high-field nuclear fusion power plants. | Undisclosed | Q1 2026 | DealStreetAsia |
| SuperMag New Energy | Builds high-field superconducting magnets for controlled nuclear fusion systems. | Undisclosed | Q1 2026 | SCMP |
| Maritime Fusion | Develops compact tokamaks and superconducting hardware for maritime and off-grid power. | $4.5M | Q4 2025 | PR Newswire |
| Proxima Fusion | Develops stellarator power plants using high-temperature superconducting magnets. | $17.6M | Q3 2025 | Proxima Fusion |
| Kyoto Fusioneering | Supplies gyrotrons, tritium systems, breeding blankets, and other fusion plant components. | $9.8M | Q3 2025 | Kyoto Fusioneering |
| Commonwealth Fusion Systems | Builds high-temperature-superconductor tokamaks, including the SPARC and ARC systems. | $863.0M | Q3 2025 | CFS |
| General Fusion | Develops magnetized target fusion systems and the LM26 demonstration machine. | $22.0M | Q3 2025 | General Fusion |
| Helical Fusion | Develops steady-state stellarator fusion plants using helical plasma confinement. | $15.0M | Q3 2025 | Business Wire |
| Proxima Fusion | Develops stellarator power plants using high-temperature superconducting magnets. | $150.0M | Q2 2025 | Proxima Fusion |
| TAE Technologies | Develops field-reversed-configuration systems targeting hydrogen-boron fusion energy. | $150.0M | Q2 2025 | TAE Technologies |
| Realta Fusion | Builds modular magnetic-mirror fusion systems for industrial heat and electricity. | $36.0M | Q2 2025 | PR Newswire |
| Novatron Fusion Group | Develops magnetic plasma confinement systems based on the NOVATRON concept. | $10.8M | Q1 2025 | Novatron Fusion |
| Marvel Fusion | Develops laser-driven fusion systems using nanostructured fuel targets. | $53.9M | Q1 2025 | Marvel Fusion |
| Renaissance Fusion | Develops stellarators with superconducting magnets and liquid-metal reactor walls. | $33.2M | Q1 2025 | Renaissance Fusion |
| Helion Energy | Develops pulsed magnetic fusion systems designed to produce commercial electricity. | $425.0M | Q1 2025 | Helion Energy |
| Acceleron Fusion | Develops low-temperature fusion systems based on muon-catalyzed reactions. | $24.0M | Q4 2024 | PRWeb |
| Xeonova | Develops field-reversed-configuration fusion systems and AI-powered digital twins. | $13.9M | Q4 2024 | FusionXInvest |
| General Fusion | Develops magnetized target fusion systems and the LM26 demonstration program. | $37.5M | Q4 2024 | BetaKit, FusionXInvest |
| Tokamak Energy | Develops spherical tokamaks and high-temperature superconducting magnet technology. | $125.0M | Q4 2024 | PR Newswire |
| Pacific Fusion | Develops high-gain pulsed magnetic fusion systems for commercial power generation. | $900.0M | Q4 2024 | Axios, Nuclear Engineering International |
| Zap Energy | Develops sheared-flow-stabilized Z-pinch fusion systems and liquid-metal cooling technology. | $130.0M | Q4 2024 | PR Newswire |
| Marvel Fusion | Develops laser-driven inertial fusion technology for commercial energy production. | $70.0M | Q3 2024 | b2venture |
| General Fusion | Develops magnetized target fusion systems and the LM26 demonstration program. | $14.6M | Q3 2024 | General Fusion |
| Type One Energy | Develops stellarator fusion power plants using advanced superconducting magnets. | $53.5M | Q3 2024 | TechCrunch |
| Neo Fusion | Develops commercial tokamak fusion technology connected with China’s BEST project. | $1,306.0M | Q3 2024 | Fusion Energy Base, FusionXInvest |
| Marathon Fusion | Develops fuel processing systems for commercial nuclear fusion power plants. | $5.9M | Q3 2024 | PR Newswire |
| Xcimer Energy | Develops high-energy laser systems for inertial fusion power plants. | $100.0M | Q2 2024 | Xcimer Energy |
| Novatron Fusion | Develops magnetic mirror technology for commercial nuclear fusion systems. | $5.43M | Q2 2024 | FusionXInvest |
| Kyoto Fusioneering | Supplies integrated fusion plant systems, components, and testing facilities. | $9.9M | Q2 2024 | Kyoto Fusioneering |
| Proxima Fusion | Develops quasi-isodynamic stellarator power plants with superconducting magnets. | $21.7M | Q2 2024 | Proxima Fusion |
| MiRESSO | Develops beryllium and mineral supply technologies for nuclear fusion systems. | $1.65M | Q1 2024 | MiRESSO |
| Blue Laser Fusion | Develops laser-based inertial fusion systems, including aneutronic fusion concepts. | $37.5M | Q1 2024 | Blue Laser Fusion |
| Thea Energy | Builds stellarators using planar coils and software-controlled magnetic fields. | $20.0M | Q1 2024 | Thea Energy |
| LINEA Innovations | Develops a hydrogen-boron fusion reactor concept in Japan. | $0.47M | Q1 2024 | FusionXInvest, LINEA Innovations |
Related blog posts
- The highest-valued startups in the nuclear fusion market
- What does funding activity look like in the nuclear fusion market?
- The most heavily funded startups in the nuclear fusion market
- What are the key fundraising trends in the nuclear fusion market?
