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Last Energy

Energy · Austin, US · lastenergy.com

Small modular 20 MW reactors mass-produced to power data centers and industry.

Founders

Bret Kugelmass (United States · ♂) — After selling his aerial-imaging company and immersing himself in nuclear via his Titans of Nuclear podcast and the Energy Impact Center, he founded Last Energy to mass-produce small modular reactors.

Date	Round	Amount
Dec 2025	Series C Last Energy raised a $100 million Series C led by Astera Institute to commercialize its mini nuclear reactors aimed at AI data centers.	$100M

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