When Anders C. Wulff set out to build a European answer to Asia's dominance in superconducting wire, he knew he'd eventually need to get bigger—fast. On April 10, his Copenhagen-based startup Subra did exactly that, pulling in €40 million in Series A funding while simultaneously swallowing THEVA Dünnschichttechnik, a three-decade-old German manufacturer with deeper roots in the industry than Subra has years of existence.
The deal, led by Novo Holdings with backing from Maj Invest and SPRIND (Germany's federal innovation agency), creates what Wulff and his investors hope will emerge as a genuine European champion in high-temperature superconductors. Whether the continent's fragmented clean-tech sector can actually produce such champions remains very much an open question. But the combined entity now has roughly 100 specialists, production facilities near Munich, and what its backers describe as complementary technologies for an energy infrastructure market that's starting to look less theoretical.
Two Companies, One Strategic Gamble
The marriage isn't exactly a merger of equals. THEVA, founded back in 1996, brought approximately 60 employees and an established product line—its Pro-Line coated conductors are already deployed in power cables, magnets, and industrial settings. Subra contributed 40-plus specialists and a proprietary "Subracable" technology that bundles wires differently than traditional flat-tape designs, theoretically reducing energy losses and improving scalability.
What THEVA lacked was Subra's momentum and investor appetite; what Subra needed was manufacturing scale and market credibility. The two had collaborated before—last November, they jointly demonstrated continuous filamentized HTS tapes longer than 400 meters, a technical milestone that matters more to engineers than investors but signals production readiness. In October 2024, THEVA's wires had powered SuperLink, a 110-kilovolt superconducting cable commissioned by Munich's municipal utility and marketed as a world first at that voltage.
THEVA had raised an €11 million Series D first close back in November 2023, drawing support from Target Partners, BayBG, eCAPITAL, and EnBW New Ventures. The acquisition terms this time? Undisclosed, naturally.
Europe's Energy Sovereignty Play
The timing reflects something larger than corporate strategy. Europe has spent the past few years discovering—sometimes painfully—what energy dependence looks like. Superconductors, which can transmit electricity with zero resistance when cooled sufficiently, have moved from physics curiosity to infrastructure talking point as the continent races to electrify transport, expand renewable grids, and chase fusion energy dreams.
EU Energy Commissioner Dan Jørgensen made the pilgrimage to Subra's facilities in February, lending political heft to the superconductor-as-sovereignty narrative. Novo Holdings, managing some €93 billion as of late 2025, had already telegraphed its commitment the previous December with a convertible loan that essentially laid groundwork for this Series A.
Subra's pitch centers on its bundled-wire architecture, which the company argues sidesteps the AC loss problems and scaling headaches that plague flat-tape competitors. The technology targets two markets: zero-loss transmission for power grids, and magnets for fusion reactors. That second market has lately attracted serious capital—Proxima Fusion, to pick one example, pulled in €130 million last June for stellarator designs that depend heavily on HTS magnets.
Whether fusion becomes commercially viable this decade or next (or ever) is almost beside the point for Subra right now. The grid applications alone justify the R&D spend, at least in theory.
What 100 Specialists Can Actually Deliver
Wulff now runs both entities from Denmark while maintaining and expanding THEVA's German footprint. Earlier pronouncements suggested Subra would move into production space four times its current size sometime in 2026, though specifics on location have been vague. The company also holds a €3.5 million European Innovation Council Accelerator grant from 2023, awarded specifically for its Subracable tech.
The combined workforce gives Subra-THEVA something resembling critical mass, at least by European deep-tech standards. But the global HTS market remains dominated by players in Asia and North America with longer track records and deeper pockets. Consolidating European capacity is one thing; actually competing for contracts in energy infrastructure, research facilities, and industrial magnets is another.
The next few quarters should clarify whether this deal represents genuine consolidation or simply two small players deciding to be small together. Novo Holdings doesn't typically make bets it expects to write off. Then again, building European champions in hardware-intensive sectors has proved notoriously difficult, and superconductors—for all their physics elegance—still require the unglamorous work of manufacturing at scale, navigating utility procurement cycles, and convincing risk-averse grid operators to rip out copper.
Subra and THEVA now have the capital, the team, and the political tailwinds. What they need next are customers willing to bet their infrastructure on a technology that's been five years away from mainstream adoption for about thirty years running.
