Commonwealth Fusion Systems
Commonwealth Fusion Systems develops high-field tokamaks and superconducting magnets for commercial fusion power.
The Company
Commonwealth Fusion Systems is building SPARC, a high-field tokamak intended to demonstrate net fusion energy, and planning its ARC commercial power plant.
The company announced $1 billion of additional equity financing in July 2026, bringing total capital raised to $4 billion.
Why It Matters
CFS is among the best-capitalized private fusion companies. Its technical milestones will shape whether fusion attracts infrastructure-style capital before commercial power generation is proven.
Valuation History
What Changed
Raised $1B of additional equity financing, bringing total capital raised to $4B.
THE NEXT COMPANY. A CLEARER PICTURE.
Get the next breakdown.
Independent company research and perspectives on private markets, delivered through The Private Ledger on Substack.