Fusion reactor startup Helion, which has a deal to supply Microsoft with electricity by 2028, raised a $425M Series F, valuing the company at $5.245B Tim De Chant / TechCrunch : TechCrunch 2025-01-28 Tim De Chant Microsoft, TechCrunch, Tim De Chant, Helion Related Coverage Sam Altman, SoftBank invest in $425M round for Helion, a Seattle-area startup chasing fusion power GeekWire A private start-up called Helion aims to have a working fusion reactor by 2028 Engadget Nuclear fusion startup Helion raises $425m from Vision Fund 2 at $5.4b valuation Reuters Helion raises $425M Series F for fusion energy Axios Investing in Helion: Abundant Intelligence Requires Abundant Energy Lightspeed Venture Partners Discussion @michaelguimarin Michael Guimarin on x Crazy that tens to hundreds of millions here will go to regulatory licensing, that is, unnecessary for safe and reliable operation.