About Last Energy
Last Energy is an Energy & Utilities company based in Washington (United States) founded in 2019. It operates as a developer of small modular reactor. Last Energy has raised $164 million across 4 funding rounds from investors including Gigafund, Autodesk and Quiet Capital. Its chief executive is Bret Kugelmass. Its website lastenergy.com draws about 25 thousand monthly visits. Last Energy offers products and services including PWR-20 and Full-Service Delivery Model. Its focus areas include Energy, Nuclear Energy, Hardware Developer and Reactors. Its legal entity is LASTA ENERGY, s.r.o. Its competitors include TerraPower, Newcleo, NuScale Power, Oklo and X Energy and 5 more; 8 of its 10 listed competitors have raised funding.
Company details
Last Energy offers PWR-20, Full-Service Delivery Model while focusing on working in the energy sector, nuclear energy, hardware developer, reactors, nuclear fission, and small modular reactor. Developer of small modular reactor. Delivering reliable solutions, it emphasizes quality, efficiency, and meeting diverse client needs.
- Headquarters Washington, United States
- SectorsEnergy & Utilities
- Email••••••••
- Website lastenergy.com
- Social LinkedIn X YouTube
- Legal Name Lasta Energy, S.R.O.
- Total Equity Funding$164M (USD)
in 4 rounds
- Latest Funding Round$100M (USD), Series C
Dec 2025
- InvestorsGigafund
& 13 more
Products & Services of Last Energy
Last Energy offers a comprehensive portfolio of products and services, including PWR-20 and Full-Service Delivery Model.
Modular reactor providing reliable baseload power for industrial decarbonization.
Comprehensive service for nuclear energy from design to operations.
Apps and channels of Last Energy
its YouTube channel Last Energy has 2.3K subscribers and 30 videos.
Videos from Last Energy
The most watched videos on Last Energy's YouTube channel, Last Energy (2.3K subscribers). Click a video to play it here.
More on Last Energy.
Funding Insights of Last Energy
Last Energy has successfully raised a total of $164M across 4 strategic funding rounds. The most recent funding activity was a Series C round of $100 million completed in December 2025. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $164M
- Total Rounds 4
- Last Round Series C — $100M
- First Round $3M
(Jun 2019)
- Investors Count 14
All 4 funding rounds of Last Energy with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Dec 2025 | $100M | Series C | – | Astera | |
| Aug 2024 | $40M | Series B | – | Gigafund, Autodesk | – |
| Jun 2021 | $21M | Series A | – | Gigafund | |
| Jun 2019 | $3M | Seed | – | First Round Capital |
14 investors in total: 13 institutional and 1 angel.
Investors in Last Energy
Last Energy has secured backing from 14 investors, including venture fund, angel, and institutional investors. Prominent investors backing the company include Gigafund, Autodesk and Quiet Capital.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Venture capital firm investing in multiple sectors | – | gigafund.com | Austin, United States | |
- | – | autodesk.org | - | |
Investments are managed by Quiet Capital in New York. | – | quiet.com | New York, United States | |
Family office of Aegerter family | – | armada.com | Kusnacht, Switzerland | |
US focused seed and early-stage VC firm | – | firstround.com | San Francisco, United States | |
Early-stage investments are focused on by Floodgate in US startups. | – | floodgate.com | Menlo Park, United States | |
- | – | aeroequity.com | - | |
Technology sectors are invested in by this venture capital firm. | – | wooricapital.co.kr | - | |
- | – | ultranative.com | - | |
Venture capital fund investing in multiple sectors | – | jamfund.com | - |
Investor details for Last Energy
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
- Complete investor list
- Round participation
- Investor portfolios
- Co-investor network
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People of Last Energy
14 people are tracked at Last Energy (10 in leadership, 4 in team).
| Name | Role | Group |
|---|---|---|
Bret Kugelmass | CEO | Leadership |
Chris Dravers | VP Commercial | Leadership |
Kristin Meister | General Counsel & Chief Compliance Officer | Leadership |
Beth May | Director Of Research And Development | Leadership |
Robert Sedgman | UK Development Director | Leadership |
Olivia Columbus | Chief Of Staff | Leadership |
Adam Lenarz | Vp, Development | Leadership |
Michael Jenner | Ceo, Last Energy UK | Leadership |
Jonathan K. | Vice President Of Talent | Leadership |
Liam Sefchick | Head Of Legal Operations | Leadership |
Jackson Miller | R&d Operations Engineer | Team |
Jessica Fontaine | Senior Associate & Operations Manager, Licensing & Commercial | Team |
Robert Boswall | Commercial, Development, & Licensing | Team |
Anton van Saase | General Counsel | Team |
Complete people profiles for Last Energy
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
- Full employee list
- Team structure
- Board tenure
- Professional contacts
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Timeline of Last Energy
3 dated milestones of Last Energy across 6 years, from founding to its latest funding, stage changes and deals.
- Founded Last Energy is founded.
- Funding First funding round of $3.0M.
- Funding Latest funding round, Series C, of $100.0M.
Competitors of Last Energy
Last Energy has 10 listed competitors in our database, 8 of them funded. They include TerraPower, Newcleo, NuScale Power, Oklo and X Energy, among others.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| terrapower.com | 2006 | Bellevue, United States | $1.46B | 299 | Advanced nuclear reactors are designed for low-carbon energy solutions. | |
| newcleo.com | 2021 | London, United Kingdom | $842.85M | – | Advanced nuclear reactors are designed, built, and operated by Newcleo. | |
| nuscalepower.com | 2007 | Portland, United States | $198.15M | 540 | Micro modular nuclear reactors are developed for scalable power generation. | |
| oklo.com | 2013 | Sunnyvale, United States | $120,000 | 2 | Small modular reactors are developed for advanced nuclear energy solutions. | |
| x-energy.com | 2010 | Greenbelt, United States | $829.68M | 246 | Small modular and high-temperature gas-cooled nuclear reactors are developed. | |
| westinghousenuclear.com | 1886 | United States | – | – | Small modular reactors are developed for nuclear power applications. | |
| radiantnuclear.com | 2019 | Los Angeles, United States | $217.96M | 44 | Designer of microreactor technology for power generation and industrial heat | |
| terrestrialenergy.com | 2013 | Oakville, Canada | $117.64M | – | Small modular reactors are developed for integral molten salt technology. | |
| usnc.com | 2011 | Seattle, United States | $47.4M | – | Micro modular reactors and advanced fuel are manufactured. | |
| kairospower.com | 2016 | Alameda, United States | – | 253 | Molten salt reactors are manufactured for nuclear fission applications. |
Detailed competitors of Last Energy
The full competitor set, operating metrics and side-by-side benchmarks require an active premium plan.
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Web traffic of Last Energy
The website of Last Energy (lastenergy.com) receives about 25.4K visits a month.
- Monthly visits25.4K
▲ 26.7% vs previous month
Websites whose visitors overlap most with Last Energy. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
niauk.org | niauk.org | 100% | – | #1,973,250 | – |
| 3degreesinc.com | 98% | 21.6K | #1,509,037 | View details | |
| powermag.com | 84% | – | #306,848 | View details | |
energyconnects.com | energyconnects.com | 84% | – | #263,801 | – |
| westinghousenuclear.com | 84% | 211.3K | #207,380 | View details | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 7 similar websites and full traffic analytics for Last Energy
The complete similar-websites list, audience overlap and engagement analytics require an active premium plan.
- 7 similar websites
- Audience overlap
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- Traffic by brand
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Top companies in Nuclear & Fusion Energy
10 companies that operate in the same segment as Last Energy (Nuclear & Fusion Energy), ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Developer of energy solutions | 1925 | Juno Beach, Florida, United States | – | USD 26.53 B | 16,800 | |
Fuel and power producer in the nuclear energy sector | 2001 | United States | USD 307.86 M | – | – | |
Clean energy solutions for generation, retail, and heating are provided. | 1998 | Espoo, Finland | – | USD 5.86 B | 4,470 | |
Advanced nuclear reactors are designed for low-carbon energy solutions. | 2006 | Bellevue, Washington, United States | USD 1.46 B | – | 299 | |
Compact tokamak fusion reactors are developed with superconducting magnets. | 2018 | Cambridge, Massachusetts, United States | USD 3.93 B | – | – | |
Advanced nuclear reactors are designed, built, and operated by Newcleo. | 2021 | London, England, United Kingdom | USD 842.85 M | USD 11.38 M | 608 | |
Deuterium-based magnetic-nuclear fusion reactors are developed for power generation. | 2010 | Redmond, Washington, United States | USD 1.44 B | – | 593 | |
Energy corporation | 1903 | Newark, New Jersey, United States | – | USD 12.28 B | 13,050 | |
Energy utilities, natural gas, and communications technology are provided. | 1912 | United States | – | USD 29.55 B | 28,600 | |
FRC nuclear fusion reactors are developed using advanced beam technology. | 1998 | Lake Forest, California, United States | USD 1.32 B | – | 304 |
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Related news about Last Energy
Complete news archive for Last Energy
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Frequently Asked Questions about Last Energy
Last Energy was founded in 2019.
Last Energy is headquartered in Washington, United States. It is registered at Washington, District Of Columbia, United States.
Bret Kugelmass is the current CEO of Last Energy.
Last Energy is a funded company, having raised a total of $164M across 4 funding rounds to date. The company's 1st funding round was a Seed of $3M, raised on Jun 2019.
Last Energy offers PWR-20, Full-Service Delivery Model while focusing on working in the energy sector, nuclear energy, hardware developer, reactors, nuclear fission, and small modular reactor. Developer of small modular reactor. Delivering reliable solutions, it emphasizes quality, efficiency, and meeting diverse client needs.
Last Energy's top competitors include TerraPower, Newcleo and X Energy.
Last Energy offers PWR-20 and Full-Service Delivery Model.
Last Energy has 14 investors. Key investors include Gigafund, Autodesk, Quiet Capital, ARMADA Investment, and David Marquardt.
Last Energy operates through Lasta Energy, S.R.O..