Proxima Fusion Raises €20M Seed to Accelerate Timeline to Fusion Power

  • Less than one year from its €7.5M pre-seed round, the first Max Planck fusion spin-out has delivered on its vision of simulation-enabled stellarator design.
  • New funding supports expansion of the world-class team in Munich and its public-private partnerships in Europe to build on existing momentum.
  • Proxima Fusion directly builds on €1.3B of public investment in the ground-breaking W7-X experiment in Germany.

Munich, Germany, April 10, 2024 – Proxima Fusion, the first spin-out from the Max Planck Institute for Plasma Physics (IPP), has raised €20M ($21.7M) in seed funding to propel the Munich-based start-up towards building the first generation of fusion power plants based on quasi-isodynamic (QI) stellarators with high-temperature superconductors. Proxima Fusion’s vision is to lead Europe into a new era of clean energy, for good.

Proxima Fusion’s seed round, led by redalpine, was preempted and oversubscribed, with participation from the Bavarian government-backed Bayern Kapital, German government-backed DeepTech & Climate Fonds, and the Max Planck Foundation. Existing investors, including Plural, UVC Partners, High-Tech Gründerfonds, Wilbe, and TOMORROW of Visionaries Club have doubled down on their pre-seed investments.

QI stellarators hold promise for a carbon-free, safe and effectively limitless source of energy. The science behind this class of magnetic confinement fusion devices has been the subject of research for more than six decades; however, achieving sustained and commercially viable fusion remains a challenge. In 2022, stellarator optimization results entirely disrupted the field, enabling Proxima Fusion to tackle these challenges with an engineering- and simulation-focused approach, leveraging advanced computing.

The company builds on groundbreaking results from the Wendelstein 7-X (W7-X) experiment, the world’s largest stellarator at the Max Planck IPP, resulting from €1.3B of visionary public investment by the German Government and the European Union.

Automated Stellarator Engineering for Radically Faster Design Iteration 

“Our first year of operation has exceeded all expectations”, said Dr. Francesco Sciortino, Co-Founder and CEO of Proxima Fusion. “In April 2023, we hit the ground running on both engineering optimization and high-temperature superconducting magnets. One year later, we are leading Europe into a new phase of stellarator R&D, having made huge progress in integrated design with our StarFinder framework.” Commenting on the new funding, he adds: “The appetite from high-caliber strategic investors validates the quality of the team we’ve assembled, our great early progress, and the groundbreaking impact of what we’re aiming to achieve”.

Simulation-driven engineering has been a key feature of Proxima Fusion since its inception. Now, AI-enabled design has taken the center stage. The entire engineering program is being structured to collect training data and enable AI across domains. “When we started Proxima Fusion, we saw the opportunity for radical automation of engineering design in QI stellarators”, comments Co-Founder Martin Kubie. “Over one year, we have gone a long way to enable that vision.”  

In backing the startup, investors join forces with a team that is building on decades of peer-reviewed research, with the audacity to redefine stellarator engineering and deeptech ambition in Europe. In less than 12 months, the company has grown to more than 30 employees, attracting talent from the likes of Google, Tesla, TUM, Harvard, MIT, CentraleSupélec, and EPFL.

Harald Nieder, physicist and General Partner at redalpine, stated: “Fusion energy presents both incredible challenges and unprecedented opportunities, and it must be pursued to ensure a clean energy future. I’m incredibly excited to partner with Proxima Fusion’s game-changing team, setting a new standard for European deeptech moonshots.”

Ian Hogarth, Partner at Plural, said: “W7-X is one of the technological wonders of the modern world. Proxima Fusion, originally spinning out from the organization behind it, aims to take the vision of W7-X to industrial level. This is GDP-level impact in the making and the team that will bring fusion to the grid and enable a clean energy future.”

“Now the key is flawless integration of the achieved scientific milestones, and first-class engineering quality”, commented Benjamin Erhart, General Partner at UVC Partners. “Proxima Fusion’s strengths in automated design, AI-enabled engineering, high-temperature superconducting magnets, as well as rapid team growth, give us unwavering confidence in their ability to turn steady-state fusion energy into a reality.”

Besides speeding up the development of key enabling technologies in both hardware and software domains, Proxima Fusion will use the Seed funding to further expand the team with world-class engineers and physicists, as well as to match public funding awards.

About Proxima Fusion

Spun out from the Max Planck Institute of Plasma Physics in 2023, Proxima Fusion has been accelerating a paradigm shift for clean energy, building on the ground-breaking W7-X experiment in Germany. The Munich-based start-up is working to develop the world’s first quasi-isodynamic stellarator power plant using high-temperature superconducting

magnets. Its goal: tapping the universe’s ultimate source of energy to continuously and reliably generate carbon-free power. Founded by a team of scientists and engineers from the Max Planck Society, MIT, and Google, Proxima Fusion is leading Europe into a new era of clean energy, for good. Learn more at

About DeepTech & Climate Fonds

The DeepTech & Climate Fonds (DTCF) invests up to €1B in the growth of transformative tech companies in the coming years. As an anchor investor and partner of long-term European investors, the DTCF helps to expand the technology ecosystem and to develop new technology-based SMEs. It is financed by the German Future Fund as well as the ERP Special Fund.


Proxima Fusion GmbH

DeepTech & Climate Fonds Management GmbH


Team photo Proxima Fusion GmbH
View into the torus hall of the Wendelstein 7-X fusion device in November 2021