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Number of companies in the fusion industry worldwide in 2025, by fuel used in the reaction

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Source

Release date

July 2025

Region

Worldwide

Survey time period

as of July 2025

Supplementary notes

DT: deuterium-tritium
pB11: proton-boron
DD: deuterium-deuterium
DHe3: deuterium-helium3.

Citation formats

Fuel used for fusion energy production worldwide 2025, by number of companies

Published by ÌÇÐÄÆƽâ°æ Research Department, Oct 10, 2025

In 2025, the most common fuel used in the global fusion industry was the one composed of the two hydrogen isotopes deuterium and tritium (DT), which fuses at low temperatures, creating a helium nucleus and releasing a neutron. The use of proton-boron fusion fuel ranked second among companies in the nuclear fusion industry, although it fuses at higher temperatures than the DT fuel.
That year, the number of companies active in the fusion power sector amounted to approximately **.

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