Proxima Fusion
Proxima Fusion develops stellarator technology for commercial fusion and raised €411M to build the Alpha demonstrator.
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Podcast Episode
🎙️ Deep Dive
EP60 — Deep Tech Files — Proxima Fusion: Europe tries to ignite a star
Listen to the episodeAbout Proxima Fusion
Proxima Fusion is a Munich-based German startup and the first spin-out from the Max Planck Institute for Plasma Physics. The company develops fusion power plants based on QI-HTS stellarators, building on the Wendelstein 7-X programme. In July 2026, it announced a €411M round, bringing its valuation to €2.4B and making it one of Europe's best-funded fusion companies. The funding will support Alpha, a net-energy stellarator demonstrator near Munich, and accelerate HTS cable, magnet and engineering-system development.
The Story
Proxima was spun out of the Max Planck Institute for Plasma Physics to turn decades of stellarator research into a European industrial fusion platform.
How Proxima Fusion works
Business Model
Deep tech energy company with a potential model based on plant development, technology licensing, energy partnerships and industrial supply chains.
Revenue Model
Not yet commercial; potential future revenue from plants, technology, energy partnerships and licensing.
Products & Services
Key Products
- Alpha net-energy stellarator demonstrator
- Stellaris commercial stellarator power plant concept
- QI-HTS stellarator platform
- HTS cable and magnet systems
Core Use Cases
- Fusion energy
- Firm clean power
- Energy security
- Industrial decarbonisation
- Data centre energy demand
Market & Clients
Key Customers
Future energy utilities, industrial energy buyers, governments and strategic infrastructure partners.
Geographic Presence
How Proxima Fusion competes
Competitors
Competitive Advantages
- First spin-out from Max Planck Institute for Plasma Physics
- Stellarator approach based on Wendelstein 7-X breakthroughs
- Strong public-private capital stack
- Strategic investors Google and RWE
- Alpha Alliance with 50+ industrial partners
How Proxima Fusion grows
Growth Strategy
Build Alpha near Munich, expand HTS cable and magnet production, hire across engineering/manufacturing/operations and prepare for Stellaris in the 2030s.
Distribution Model
Long-term energy infrastructure partnerships and potential power plant development/licensing.
Moat (Defensibility)
Stellarator design know-how, scientific heritage, HTS magnet development, industrial partnerships, public funding alignment and large capital base.
Regulatory Context
Relevant to energy infrastructure, nuclear/fusion regulation, public funding, industrial policy and strategic technology sovereignty.
Key Risks
- Fusion may not reach commercial viability on expected timeline
- Net-energy demonstrator risk
- High capital intensity
- Manufacturing and magnet scale-up risk
- Regulatory and siting complexity
- Competition from US and Chinese fusion companies
Strategic Insights
- The round shows European fusion moving from science into an industrial-policy phase funded by public and private capital.
- Google's participation connects fusion energy with future AI and data-centre energy demand.
- RWE's participation signals incumbent energy interest in a still-distant but potentially transformative technology.
Funding & Investors
Total Funding
Latest Valuation
Funding Rounds
- 2023 - Pre-seed: ~€7M
Lead: Plural, UVC Partners - 2024 - Seed: €20M
Lead: Redalpine - 2025 - Series A: €130M
Lead: Cherry Ventures, Balderton Capital - 2026 - Growth financing: €411M / $468M
Lead: XTX Ventures, East X Ventures
Key Investors
Founding Team
Founders
Key Executives
- Dr. Francesco Sciortino - Co-founder & CEO
- Sergei Galperin - CFO
Key Metrics
Lessons from Proxima Fusion
- In extreme deep tech, public and private capital often need to combine to make the roadmap credible.
- A moonshot becomes investable when attached to clear engineering milestones.
- Energy sovereignty narrative helps, but does not replace physical validation.
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Read AnalysisSources
- Proxima Fusion Raises 411 Million to Build Europe's Commercial Fusion Champion — Proxima Fusion
- Largest European fusion investment on record sees Proxima Fusion raise 411 million — EU-Startups
- Google, RWE back Proxima Fusion in 411 million financing round — Reuters
- Proxima Fusion, RWE, Bavaria and Max Planck sign agreement to build the world's first commercial fusion power plant in Europe — Proxima Fusion
- Stellaris: A high-field quasi-isodynamic stellarator for a prototypical fusion power plant — Fusion Engineering and Design
- Record financing for Proxima Fusion — Max Planck Society
- Nuclear fusion start-up wins Bavarian state backing for €2bn test plant — Financial Times