A Munich start-up spun out of a physics institute three years ago now sits at the centre of a multi-billion-euro plan to make Germany the first country in the world with a commercial fusion power plant.

From Lab Spin-Out to National Priority

Proxima Fusion didn’t exist until 2023. Founded by five researchers spun out of the Max Planck Institute for Plasma Physics (IPP) — Francesco Sciortino, Lucio Milanese, Jorrit Lion, Martin Kubie, and Jonathan Schilling — the Munich-based company set out to commercialise decades of German public fusion research built around the “stellarator,” a magnetic confinement design distinct from the more widely known tokamak approach used by ITER in France.

That research pedigree matters. Proxima builds directly on Wendelstein 7-X, the IPP’s record-breaking stellarator experiment, widely regarded as the most advanced machine of its kind in the world. Where Proxima differs from that decades-long public research effort is speed: the company has adopted a simulation-driven engineering approach, combining stellarator optimisation with high-temperature superconducting magnet technology, and has assembled a team of more than 100 people pulled from institutions including MIT, Harvard, SpaceX, Tesla and McLaren.

The Money Behind the Momentum

The scale of investment behind Proxima has escalated sharply over the past year. In September 2025, the company closed what was then described as the largest private fusion investment round in Europe — €130 million, led by Cherry Ventures and Balderton Capital, later topped up with a further €15 million, taking total funding past €200 million.

That was just the opening act. In February 2026, Proxima signed a memorandum of understanding with the Free State of Bavaria, energy giant RWE, and the Max Planck Institute for Plasma Physics to build what they describe as the world’s first commercial stellarator fusion power plant. The roadmap has two stages: a demonstration reactor named Alpha, to be built in Garching, aiming to become the first stellarator anywhere to demonstrate net energy gain — generating more energy than it consumes — by the early 2030s. If Alpha succeeds, it clears the way for Stellaris, a full commercial fusion plant planned for the site of RWE’s former nuclear power station in Gundremmingen.

The numbers involved are substantial. Bavaria has committed €400 million toward a roughly €2 billion test-facility plan, with Proxima and RWE each expected to cover a further 20%. The remaining, and largest, share — around €1.2 billion — depends on federal funding Proxima is pursuing under Germany’s “Fusion Action Plan,” a scheme allocating more than €2 billion nationally to build a domestic fusion industry by 2029. Chancellor Friedrich Merz’s government has publicly framed fusion leadership as a strategic national goal, and Bavaria’s state government has gone further, describing its ambition to evolve from a research hub into what it calls a “foundational location for the fusion industry.”

Building an Industrial Ecosystem, Not Just a Reactor

What sets this moment apart from previous fusion funding announcements is the industrial scaffolding being built around it. Alongside the Bavaria agreement, Proxima launched the Alpha Alliance, an industrial consortium of more than 30 partners including Siemens Energy, Air Liquide, Thales, Eni, and RWE, aimed at coordinating fusion component manufacturing and supply chains across Europe rather than leaving each project to build its own from scratch.

Proxima CEO Francesco Sciortino has framed the moment in explicitly strategic and economic terms, describing fusion as an opportunity to shift global energy dependence away from natural resources and toward technological leadership, and casting the Alpha Alliance as the start of a long-term European industrial growth trajectory. It’s a deliberate contrast with the international competitive picture: US and Asian fusion companies have collectively raised billions in the past two years, and Europe — despite genuine scientific leadership through decades of public research — has been seen as lagging on the industrial and commercial side.

Not every observer is convinced the timeline holds. Independent analysts note that the “grid by the 2030s” target Proxima and its peers have set is regarded by many in the field as highly ambitious, and the €1.2 billion in federal funding the project depends on has yet to be confirmed by Berlin. Fusion remains, by any honest accounting, an unproven path to commercial electricity generation — but the scale of capital and industrial coordination now being mobilised behind it in Germany is without precedent in Europe.

What This Could Mean for Ireland

Ireland has no fusion start-up of its own, and no domestic nuclear power industry — nuclear generation remains legislatively prohibited, a position reaffirmed by junior minister Timmy Dooley in April 2026 even as Taoiseach Micheál Martin signalled some openness to the debate. But Ireland is not a bystander to Europe’s fusion push. As a member of Euratom, Ireland co-funds European fusion research and the ITER project directly, and Irish public money already flows into the same European fusion ecosystem that companies like Proxima are now trying to commercialise.

Ireland also has a formal seat at the table on how this technology gets regulated. In May 2026, Ireland was named among the founding members of the European Nuclear Safety Regulators Group’s new Task Force on Fusion Energy, alongside Germany, France, Italy, Spain, Finland and Sweden — a body set up specifically to advise the European Commission on whether the EU needs fusion-specific legislation as private projects like Proxima’s move from research toward real construction. And Ireland has genuine scientific standing in this space: Dublin City University and the National Centre for Plasma Science and Technology hosted the 2024 Symposium of Fusion Technology, Europe’s largest fusion technology conference, drawing 1,000 scientists and engineers from around the world to Dublin.

For Irish industry, the more immediate opportunity may be supply chain rather than reactors. The European Commission has actively encouraged SME involvement in fusion procurement through ITER’s Fusion for Energy programme, and the Alpha Alliance’s stated ambition — coordinating component manufacturing and skills across Europe — is precisely the kind of industrial consortium where specialised Irish engineering, materials, and precision manufacturing firms could plausibly find a role, even without hosting a reactor on Irish soil.

The Bottom Line

Proxima Fusion has gone from three-year-old spin-out to the centrepiece of Germany’s bid to be first in the world with commercial fusion power, backed by an industrial coalition and government funding pipeline on a scale Europe’s fusion sector hasn’t seen before. Whether Alpha and Stellaris hit their 2030s targets remains genuinely uncertain. What’s not in doubt is that Ireland, through Euratom funding, its new seat on Europe’s fusion regulatory task force, and its own research credentials, is already inside the room where this technology’s European rules and industrial opportunities are being shaped — even without a reactor of its own.