Commonwealth Fusion Systems

Commonwealth Fusion Systems

ClimateTechFusion EnergyB2B📍 Cambridge, United States

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.

Visit website ↗LinkedIn ↗
Total raised
$1B
tracked to date
Latest round
Series B
Aug 15, 2026
Known investors
3
led by Breakthrough Energy Ventures

🏆 Featured in Datapile’s Q3 2026 USA Funding Report

Read the Q3 2026 USA report →
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Featured in Datapile’s Q3 2026 USA Funding Report
<a href="https://datapile.co/reports/q3-2026-usa-startup-funding" target="_blank" rel="noopener" style="display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:9999px;background:#0B1224;color:#ffffff;font:600 13px/1.2 -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;text-decoration:none;border:1px solid #7C5CFF"><span style="display:inline-block;width:11px;height:11px;border-radius:3px;background:#7C5CFF"></span>Featured in Datapile&rsquo;s Q3 2026 USA Funding Report</a>

Funding history

  1. 1
    $1BSeries BAug 15, 2026

    Led by Breakthrough Energy Ventures

    Announcement ↗

Founder

Bob Mumgaard
Bob Mumgaard
CEO & Co-founder
LinkedIn ↗

Investors in Commonwealth Fusion Systems

Backers from this company's tracked funding rounds.

  • BBreakthrough Energy VenturesLead investorVC firm
  • TThe EngineVC firm
  • BBill GatesAngel

Commonwealth Fusion Systems in the news

Coverage of this company's funding, tracked by Datapile.

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