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Proxima Fusion

EnergySeries B

Stellarator fusion for affordable, reliable clean energy

1Rounds
0Articles
General InformationProxima Fusion is a German nuclear fusion startup founded in 2021 with 51-200 employees, focused on developing stellarator fusion reactors for commercial power generation.
Funding & FinancialsThe company has raised approximately €50 million+ across multiple rounds, with Series B funding secured to advance its Stellarator technology toward demonstration plants.
Leadership & TeamFounded by Dr. Dirk Sauer and a team of fusion physics experts from Max Planck Institute and European fusion research centers, bringing deep stellarator expertise to commercial development.
Recent ActivityProxima Fusion is actively constructing its Proxima Fusion 1 (PF1) demonstration reactor and has secured partnerships with industrial suppliers and research institutions to validate stellarator commercial viability.

Highlights

Total Raised
1 rounds
Latest Round
$468
Jul 9, 2026
Stage
Series B
energy
Employees
51-200
Founded 2021
Headquarters
News Coverage
Talent Signals
SEC Filings

Backers

and others
East X Ventures
Google
KfW Capital
RWE
SPRIND
XTX Ventures

Funding History

$468
2026
Series (growth stage)
SEC Form D   Editorial
Jul 9, 2026
$468 millionSeries (growth stage) · Editorial

Investors: XTX Ventures, East X Ventures, RWE, Google, KfW Capital, SPRIND, and others

German-based fusion energy company developing stellarator reactors raised €411 million ($468 million) to commercialize fusion technology and build European fusion champion.

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