Proxima Fusion, a Munich-based nuclear fusion company, has secured €411 million ($450 million) in a growth-stage funding round, according to announcements from the company. The investment values the cleantech firm at €2.5 billion, marking a significant milestone for the German fusion sector.
The round was led by XTX Ventures and East X Ventures, with notable participation from Google alongside an extended investor consortium that includes RWE, SKion, KfW, SPRIN-D, Burda Principal Partners, UVC Partners, Cherry Ventures, Plural, and Balderton. This diverse backing demonstrates broad confidence in the company’s technology from both venture capital and strategic corporate investors.
Accelerating Stellarator Development
The capital injection will fund the acceleration of Proxima Fusion’s stellarator development program, a magnetic confinement fusion design that represents an alternative approach to tokamak-based fusion reactors. Specifically, the funding will support the construction and operation of the Alpha demonstration project, which the company positions as a critical milestone toward commercial fusion energy generation.
According to Francesco Sciortino, CEO of Proxima Fusion, the investment reflects growing recognition of the technological and commercial potential in fusion energy. “Europe is racing with the United States and China to get to the first fusion power plant. Investors recognise both the urgency and the opportunity of what we’re doing and are backing us to develop a generational energy technology company,” Sciortino stated.
Government Support for Commercialization
Beyond the private investment round, Proxima Fusion is pursuing additional public sector backing. The company is targeting €1.2 billion in funding from the German federal government to support its commercialization pathway, reflecting the strategic importance Berlin places on fusion energy development for its energy transition goals.
This latest financing brings Proxima Fusion’s total funding to €1.061 billion, establishing the company among Europe’s most well-capitalized fusion ventures. The funding timeline suggests the company is entering a critical phase of technology demonstration and validation.
European Fusion Momentum
The investment underscores growing momentum in Europe’s fusion sector, as multiple companies advance toward demonstration-scale reactors. Germany has positioned itself as a hub for fusion innovation, with substantial government support for the technology as part of its broader decarbonization strategy. The participation of traditional energy players like RWE alongside venture investors and technology companies like Google indicates that fusion energy is increasingly attracting capital across the investment ecosystem.
Proxima Fusion’s funding success reflects broader confidence that fusion energy will play a meaningful role in meeting Europe’s climate targets, with private investors and governments recognizing both the technological feasibility and the commercial opportunity in developing commercially viable fusion power plants within the coming decade.