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September 2025 Fusion Equity Investment Update

September 01, 2025 by Sam Wurzel

Last updated Jul 6, 2026

Investment

So far in 2025, fusion companies have announced several major funding rounds, already setting a yearly record for equity investment in fusion.

Equity investments in fusion companies through September 1st, 2025 broken down by country

In order of size, 2025 equity investments include:

  • China Fusion Energy Co., Ltd. ($2.1B)1
  • Commonwealth Fusion Systems ($863M)
  • Helion ($425M)
  • Energy Singularity ($240M)1
  • Proxima Fusion ($150M)
  • TAE Technologies ($150M)
  • Marvel Fusion ($51M)
  • Realta Fusion ($36M)
  • Renaissance Fusion ($33M)
  • General Fusion ($22M)
  • Fusion Fuel Cycles ($20M)
  • Helical Fusion ($16M)
  • Novatron Fusion Group ($11M)
  • Hexium ($9.5M)

Below are the totals with three- and five-year moving average lines. These numbers speak for themselves.

Total equity investments in fusion companies through September 1st, 2025

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  1. The equity investments ascribed to China Fusion Energy Co., Ltd. and Energy Singularity are reported as Registered Capital, defined in China’s Company Law as the amount of capital that shareholders pledge to contribute to a company. Unlike typical stock purchase agreements, Registered Capital does not necessarily involve an immediate transfer of funds, but it still represents equity-like, at-risk capital. For the purposes of this graph, we therefore classify it as an equity investment supporting the pursuit of commercial fusion energy. ↩↩

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