TerraPower
TerraPower is a climate tech company in Bellevue, United States, founded in 2006. It has raised $1.5B across 3 rounds, most recently a $650.0M Venture Round in June 2025.
Advancing nuclear energy for a clean future.
- Headquarters
- Bellevue, Washington
- Employees
- 501–1000
- Founded
- 2006
- Business Model
- B2G
- Website
- terrapower.com
- Total Funding
- $1.5B
- Last Round
- $650.0M Venture RoundJun 2025
- Rounds
- 3
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 3 funding rounds and 4 investors for this company. The full record is or through the API.
About
TerraPower, founded by Bill Gates in 2006, is an advanced nuclear energy company developing next-generation reactor designs including the Natrium sodium-cooled fast reactor and molten-salt reactors. The company aims to provide safe, clean, and affordable nuclear energy while advancing medical isotope production for cancer treatment.
Summary
It lists 501–1000 employees. It has raised $1.5B in total across 3 rounds, most recently a $650.0M Venture Round in Jun 2025. Investors include SK Inc., SK Innovation and Microsoft.
Tech & App Stack
4 technologies & apps tracked
Every product and vendor across these categories, with where each signal came from.
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Funding History
Jun 2025
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Funding: Venture Round. Amounts, valuations, and investors where available.
Investors
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