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)

Tim De Chant / TechCrunch:
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  —  Few fusion startups have been as closely watched as Helion.  The 12-year-old company is backed by Sam Altman, rumored to be in talks with OpenAI …