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Helion Energy — Startup ProfileCommercial fusion power using field-reversed configuration technologyHQ: Everett, WA, United States | Founded: 2013 | Employees: 500-1,000 | Stage: Late Stage (Series G) | Website: https://helionenergy.comAboutHelion Energy is developing commercial fusion power using field-reversed configuration technology. The company aims to build the world's first fusion power plant and has signed the first-ever fusion power purchase agreement with Microsoft.Key Metrics

Total Funding: $1.5B

Last Round: Series G ($465M)

Founded: 2013

Headcount: 500-1,000

Valuation: $15.5B

Funding Rounds

Round: $465M (2026-06-04) — Thrive Capital

Round: $425M (2025-01-28) — Sam Altman

Key People

David Kirtley

Chris Pihl

Key Competitors

Commonwealth Fusion Systems —

TAE Technologies —

Timeline Highlights

2026-06-04: Series G

2025-01-28: Series F

2013-01-01: Founded

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