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TerraPower
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Developer of a novel nuclear energy generation system

Founded in 2008
Founded in

Company type Private Public ()
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Industry Group energy & power

Sector nuclear fission

TRL Range 4-6
TRL 1 Basic research
TRL 2 Technology formulation
TRL 3 Applied research
TRL 4 Small scale prototype
TRL 5 Large scale prototype
TRL 6 Prototype system
TRL 7 Demonstration system
TRL 8 First of a kind commercial system
TRL 9 Full commercial application
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Headquarters Bellevue, WA Bellevue, United States
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Updated by Cleantech Group on 06/19/2025

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08/28/2020
GE Hitachi Nuclear Energy GE Hitachi Nuclear Energy
The companies are launching the Natrium concept, which pairs five hours of storage and a sodium fast reactor. The solution could be used to boost a 345-megawatt small modular reactor to around 500 megawatts for a period of up to five hours.
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Confirmed by GE Hitachi Nuclear Energy
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Date Investors Type Amount
06/18/2025 Bill Gates Bill Gates , Nvidia Nvidia (2)
Post-money valuation of
The purpose of the funding was not disclosed, but the company is aiming to obtain $4B regulatory approval for its nuclear plant in Wyoming
 Growth Equity $650,000,000
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