Realta Fusion is building CoSMo fusion™, a compact, scalable and modular magnetic-mirror fusion system that traps super-heated hydrogen between high-field magnets to generate carbon-free heat or electricity for industrial users such as data centers, chemical processors, metal recyclers and remote mines. The company spun out of a U.S. Department of Energy ARPA-E–funded experiment at the University of Wisconsin-Madison that set a 17-Tesla magnetic-mirror field record using high-temperature superconducting magnets. CEO and co-founder Kieran Furlong positions Realta’s approach as a lower-capital path to commercial fusion compared with alternative concepts. Current work focuses on de-risking the physics of its reactor while progressing toward commercialization. Financially, Realta recently closed a $9.5 million growth capital debt facility from Silicon Valley Bank, adding to a $36 million Series A led by Future Ventures and a 2023 seed round led by Khosla Ventures (undisclosed size). These funds provide runway for continued technology validation and system development.

Total raised

$58M

Funding rounds

4

Latest round

Debt Financing

Latest activity

Feb 2026