Helion raises $465M as AI power demand keeps pulling capital into energy

Helion's latest round belongs in an AI feed because power supply is now part of AI infrastructure strategy. TechCrunch reported that the Sam Altman-backed fusion company raised $465 million in a Series G led by Thrive Capital, valuing the startup at $15.5 billion. Helion has now raised about $1.5 billion in total and is racing to complete Orion, its first power plant. The key customer signal is Microsoft: Helion has an aggressive target to deliver fusion power to the grid as early as 2028 if it can satisfy the terms of its Microsoft deal. Fusion remains technically and commercially uncertain, so this is not proof that AI data centers will soon run on fusion. But it is a useful capital-markets signal that the AI power bottleneck is pushing investors and hyperscalers toward long-horizon energy bets.

Key details: June 4, 2026, Helion, $465M Series G, $15.5B valuation, Thrive Capital, $1.5B total raised, Orion power plant, Microsoft power deal.

Continue swiping for more AI Brief stories.