Helion Energy

Helion Closes $465M as Fusion's Funding Boom Hits 17 Startups Over $100M

Helion Energy, the Sam Altman-backed fusion startup, closed a $465 million round at a reported $15.5 billion valuation -- the standout in a sector where 17 companies have now each raised over $100 million and total private fusion investment has topped $13 billion. AI's insatiable power demand is turning fusion from science project into a fundable energy bet.