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Companies

The companies behind the projects.

Developers, designers and the suppliers they depend on, public and private alike. Technology, project progress and investment access stay separate, each with its own source and date.

All areasAdvanced nuclearNext-generation geothermalFusionLong-duration storageGrid and enabling infrastructure
Public and privatePublicly listedPrivately held

3 companies in Fusion, privately held.

Privately held13 developments

Helion Energy

Fusion · Pulsed magneto-inertial fusion developer (Orion plant, Malaga, Washington)

Latest (Jun 16, 2026): Orion: Radioactive Materials License and Radioactive Air Emissions License for the Orion facility (state radiation licences; Helion's claim that these are the licences needed for plant operations is its own) (permission issued)

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Privately held0 developments

Commonwealth Fusion Systems

Fusion · Tokamak fusion developer (SPARC in Massachusetts, planned ARC plant in Virginia)

No developments in the current window yet.

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Privately held0 developments

Zap Energy

Fusion · Sheared-flow Z-pinch fusion developer

No developments in the current window yet.

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Coverage is not an offer to invest. Private ownership does not imply available shares. Sector labels are Power Inflection’s own coverage classification, not company claims.

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