Commonwealth Fusion Systems raises $1.00B Series B (United States, Aug 2026)
$1.00B
$1 billionReach the investors backing rounds like this
Backed by Breakthrough Energy Ventures, The Engine +1 more · verified emails and LinkedIn on Datapile
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Overview of Fusion Startups Securing Over $100 Million in Funding - WEEX
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Commonwealth Fusion Systems (CFS) is focused on developing fusion power technology to generate nearly limitless energy. The company is building Sparc, a power plant designed to achieve scientific breakeven by 2027, and has raised a total of $3.94 billion in funding to date.
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Overview of Fusion Startups Securing Over $100 Million in Funding WEEX
Investors · 3
1 hiddenRelated rounds
| Aug 15, 2026 | Rune Energy | $7.0M | Early VC | United States |
| Aug 15, 2026 | CAIS | $170.0M | — | United States |
| Aug 14, 2026 | Neros | $250.0M | Series C | United States |
| Aug 14, 2026 | Finley | $1.9M | Pre-seed | United States |