CFS
PrivateLast Round
Series B
Extension
Aug 28, 2025
Est. Valuation
$5B
Total Funding Raised
$3.76B
Company Overview
Commonwealth Fusion Systems is an energy technology company focused on designing and constructing fusion machines that deliver limitless, clean energy while leveraging advanced magnet technology to combat climate change.
Sector
Energy & Sustainability
Verticals
Renewable Energy, Advanced Materials, Smart Grid
Business Model
B2G
Customer Profile
Government Contracts, Hardware Sales
AI Layer
Non-AI
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
CFS Comps
Public and private peers based on sector, stage, and business model.
CFS Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B Extension | Aug 28, 2025 | ||||
| Series A | May 13, 2025 | ||||
| Series B | Dec 1, 2021 | ||||
| Series A Extension | May 26, 2020 | ||||
| Series A | Jun 27, 2019 |
Key People
Founding team and executive leadership
CFS Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| One Madison Group | Series B |
| Development Bank of Japan | Series B |
| Counterpoint Global | Series B Extension |
| Fine Structure Ventures | Series A Extension, Series B |
| Fujikura Ltd. | Series B, Series B Extension |
| Temasek | Series B, Series A Extension |
| Future Ventures | Series A Extension, Series B, Series A, Series B Extension |
Market signals
Structured signals derived from secondary market and firmographic data.
- Apr 21, 2026
Experts gathered for the second Boundary Collaborators Workshop.
- Mar 4, 2026
SPARC tokamak assembly underway, targeting 140MW fusion power.
CFS Filings
SEC and related filings with document metadata.
| Typed | Date | Amount Offered | Amount Sold | Filling | Pages | Download |
|---|---|---|---|---|---|---|
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Frequently Asked Questions
Common questions about CFS's valuation, stock price, and market status.
