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Last Energy

Washington, DC · Founded 2019 · Privately Held (backing)

Developer of small modular nuclear power projects intended to transform the nuclear power industry by dramatically reducing the time and cost of construction. Last Energy is based in Washington, DC and was founded in 2019. Its last reported valuation was $643 million in Jul 2025. It has raised $324 million.

Last reported valuation
$643.0M
Oct 2026
Priced at
—
Total raised
$323.7M
Last round
—

Last Energy key facts

as of Oct 2026
  • Developer of small modular nuclear power projects intended to transform the nuclear power industry by dramatically reducing the time and cost of construction.
  • Last Energy is valued at approximately $643.0M as of Oct 2026 (last reported valuation).
  • It has raised $323.7M; the latest was Later Stage VC ($101.0M) in Jul 2025.
  • Notable investors include Impact Assets, Quiet Capital, Western Technology Investment, First Round Capital, Galaxy Interactive — 20 tracked in total.
  • Status: Privately Held (backing).
Last reported valuation
LOW confidence
$643.0M

Last Energy's last reported valuation, Jul 2025. Nothing priced has surfaced since.

set by last reported valuationas of Oct 2026question about this number?
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Last Energy funding rounds

No rounds on record

No funding rounds for Last Energy are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.

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Last Energy valuation

Last Energy's last reported valuation was $643 million in Jul 2025. No priced round, secondary trade or fund mark has surfaced since.

Last Energy investors

20 investors are on record for Last Energy, including Impact Assets, Quiet Capital, Western Technology Investment and First Round Capital. By type, the record holds 4 venture capital firms and 1 family office.

About Last Energy

Developer of small modular nuclear power projects intended to transform the nuclear power industry by dramatically reducing the time and cost of construction. The company's plants produce both direct heat and electricity, are modular, and use standard pressurized water reactor technology to generate power and can be readily integrated into industrial processes to achieve sustainability goals, decarbonize global energy production and increase access to clean, affordable power, enabling clients to decarbonize global energy production and increase access to clean and affordable power.

Sector
Energy
HQ
Washington, DC, United States
Founded
2019
Employees
60
Ownership
Privately Held (backing)

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