Last Energy Overview

  • Year Founded
  • 2019

Year Founded

  • Status
  • Private

  • Employees
  • 75

Employees

  • Latest Deal Type
  • Series C

  • Latest Deal Amount
  • $101M

  • Investors
  • 21

Last Energy General Information

Description

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.

Contact Information

Ownership Status
Privately Held (backing)
Financing Status
Venture Capital-Backed
Corporate Office
  • 1923 Vermont Avenue Northwest
  • Washington, DC 20001
  • United States
+1 (202)
Primary Industry
Energy Infrastructure
Other Industries
Energy Production
Corporate Office
  • 1923 Vermont Avenue Northwest
  • Washington, DC 20001
  • United States
+1 (202)

Last Energy Timeline

2023202420252026
Financing RoundCaptured Employee CountEstimated Employee Growth

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Last Energy Valuation & Funding

Deal Type Date Amount Raised to Date Post-Val Status Stage
6. Later Stage VC (Series C) 18-Jul-2025 $101M Completed Generating Revenue
5. Later Stage VC (Series B) 31-Jan-2025 Completed Generating Revenue
4. Capital Spending 01-Dec-2024 Completed Startup
3. Later Stage VC (Series B) 21-May-2024 Completed Startup
2. Early Stage VC (Series A) 16-Feb-2021 $20M $24M Completed Startup
1. Seed Round 23-Mar-2020 $4M $4M Completed Startup
To view Last Energy’s complete valuation and funding history, request access »

Last Energy Cap Table

Stock # of Shares
Authorized
Par Value Dividend Rate (%) Original
Issue Price
Liquidation Liquidation
Pref. Multiple
Conversion Price % Owned
Series C
Series B-1
Series B
Series A 6,323,775 $0.000001 $3.32 $3.32 1x $3.32 18.79%
Seed 2,962,959 $0.000001 $1.01 $1.01 1x $1.01 8.8%
To view Last Energy’s complete cap table history, request access »

VC Exit Predictor

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Opportunity Score

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Exit Type

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Last Energy Comparisons

Description
Primary
Industry
HQ Location
Employees
Total Raised
Post Valuation
Last
Financing
Details
Developer of small modular nuclear power projects intended to transform the nuclear power industry by dramatically reduc
Energy Infrastructure
Washington, DC
75 As of 2026

Santa Clara, CA
 

Alameda, CA
 
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Last Energy Competitors (8)

One of Last Energy’s 8 competitors is Oklo (Alternative Energy Equipment), a Formerly VC-backed company based in Santa Clara, CA.

Company Name Financing Status Location Employees Total Raised Last Financing Date/Type Last Financing Amount
Oklo (Alternative Energy Equipment) Formerly VC-backed Santa Clara, CA
Kairos Power Venture Capital-Backed Alameda, CA
TerraPower Venture Capital-Backed Bellevue, WA
Terrestrial Energy Formerly VC-backed Charlotte, NC
Newcleo Formerly VC-backed Paris, France
You’re viewing 5 of 8 competitors. Get the full list »

Last Energy Patents

Last Energy Recent Patent Activity

Publication ID Patent Title Status First Filing Date Technology (CPC) Citations
US-12548684-B2 Containment for a nuclear reactor Active 14-Nov-2023
US-20250157680-A1 Containment structure for nuclear system Active 14-Nov-2023
US-20260188531-A1 Containment structure for nuclear system Pending 14-Nov-2023
WO-2025106620-A1 Containment structure for nuclear system Inactive 14-Nov-2023
WO-2025106620-A4 Containment structure for nuclear system Inactive 14-Nov-2023 G21C13/0875
To view Last Energy’s complete patent history, request access »

Last Energy Signals

Growth Rate

Weekly
Growth
Weekly Growth

Size Multiple

Median
Size Multiple

Key Data Points

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Last Energy Investors (21)

Investor Name Investor Type Holding Investor Since Participating Rounds
AE Ventures Venture Capital Minority
Astera Institute Not-For-Profit Venture Capital Minority
Chaucer Global Venture Capital Minority
Dysruptek Corporate Venture Capital Minority
Endowment Arm Corporate Venture Capital Minority
You’re viewing 5 of 21 investors. Get the full list »

Last Energy FAQs

  • When was Last Energy founded?

    Last Energy was founded in 2019.

  • Where is Last Energy headquartered?

    Last Energy is headquartered in Washington, DC.

  • What is the size of Last Energy?

    Last Energy has 75 total employees.

  • What industry is Last Energy in?

    Last Energy’s primary industry is Energy Infrastructure.

  • Is Last Energy a private or public company?

    Last Energy is a Private company.

  • What is the current valuation of Last Energy?

    The current valuation of Last Energy is .

  • What is Last Energy’s current revenue?

    The current revenue for Last Energy is .

  • How much funding has Last Energy raised over time?

    Last Energy has raised $324M.

  • Who are Last Energy’s investors?

    AE Ventures, Astera Institute, Chaucer Global, Dysruptek, and Endowment Arm are 5 of 21 investors who have invested in Last Energy.

  • Who are Last Energy’s competitors?

    Oklo (Alternative Energy Equipment), Kairos Power, TerraPower, Terrestrial Energy, and Newcleo are some of the 8 competitors of Last Energy.

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