Last Energy secures $100 million in an oversubscribed Series C led by Astera Institute to advance its nuclear technology and pilot reactor initiatives.
Amount Raised
$100 Million
Round Type
Series C
WashingtonManufacturingEnergyRenewable EnergyInvestors
Description
Last Energy has closed an oversubscribed Series C funding round exceeding $100 million, led by Astera Institute. The financing will support the completion of their PWR-5 pilot reactor and commercialization of the PWR-20. Additional investors include JAM Fund, Gigafund, and Woori Technology Co., Ltd., among others. The company's goal is to transition into commercialization of its production power plants.
Quick answer
Last Energy raised $100 Million in a Series C round, dated December 16, 2025. Investors: Astera Institute, Woori Technology Co., Ltd., Galaxy Interactive, Ultranative, AE Ventures, The Haskell Company, Gigafund and Jam Fund. Last Energy is based in Washington, District Of Columbia, United States.
- How much did Last Energy raise?
- Last Energy raised $100 Million in a Series C round on December 16, 2025.
- Who invested in Last Energy?
- Astera Institute, Woori Technology Co., Ltd., Galaxy Interactive, Ultranative, AE Ventures, The Haskell Company, Gigafund and Jam Fund are named as investors in this round.
- What does Last Energy do?
- Last Energy's mission is to decarbonize global energy production and increase access to clean, affordable power.
- Where is Last Energy based and how big is it?
- Last Energy is based in Washington, District Of Columbia, United States. Fundz records about 60 employees.
- Who are the decision-makers at Last Energy?
- Fundz holds 5 contacts at Last Energy. Names and contact details are shown to Fundz members.
Source: Fundz verified event record.
Who else raised in Energy and Renewable Energy around the same time
Companies in the same sectors as Last Energy that raised within 45 days of this round, from Fundz verified event records.
- Visolis raised $2.9M (Grant) on January 29, 2026.
- LeydenJar raised $9.3M on January 29, 2026.
- XFuel raised $20M (Series A) on January 28, 2026.
- GlassPoint raised $20M on January 26, 2026.
- Ascent Solar Technologies raised $10M on January 23, 2026.
- CoolSem Technologies raised an undisclosed amount (Pre-Seed) on January 19, 2026.
Who to call at Last Energy, and when
A new round usually means Last Energy is about to hire and buy. The teams that reach out first get the meeting.
- An alert the day Last Energy raises, hires an executive or expands, scored against what you sell
- The decision-makers there, with verified emails
- Who you already know at Last Energy, from your own LinkedIn network
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Related People
Last Energy raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.
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