Fusion Q&A
Who funds Commonwealth Fusion Systems?
Short answer
Commonwealth Fusion Systems has raised over $3 billion across multiple rounds. Its lead investors include Breakthrough Energy Ventures (Bill Gates), Khosla Ventures, Eni, Tiger Global, Future Ventures, Google, Temasek, Engine Ventures, and the State of Massachusetts pension fund. The 2024 Series B2 alone exceeded $1.8B.
The capital stack
CFS has raised more than any private fusion company in history — over $3B cumulative. Bill Gates' Breakthrough Energy Ventures has led multiple rounds. Italian energy major Eni is the largest strategic.
The 2021 Series B raised $1.8B at a $1B+ valuation — at the time, the largest single private fusion round ever. The 2024 Series B2 again exceeded $1.8B.
Frequently asked
- How much has Commonwealth Fusion raised?
- Over $3 billion in cumulative private funding.
- Is Bill Gates investing in fusion?
- Yes — through Breakthrough Energy Ventures, Gates is the lead investor in Commonwealth Fusion Systems and has backed several other fusion companies.
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