Valar Atomics raises $450M at $2B valuation to power AI data centres with small nuclear reactors
What's the deal? Valar Atomics, a nuclear energy startup, has raised $450 million at a valuation of $2 billion, comprising $340 million in equity and $110 million in debt.
The startup counts Anduril IndustriesDealroom has a profile for this one. Try Dealroom → founder Palmer LuckeyDealroom has a profile for this one. Try Dealroom →, Palantir Technologies executive Shyam SankarDealroom has a profile for this one. Try Dealroom →, and Lockheed MartinDealroom has a profile for this one. Try Dealroom → board member John DonovanDealroom has a profile for this one. Try Dealroom → among its investors. The round follows a $130 million raise in November 2025 led by Snowpoint VenturesDealroom has a profile for this one. Try Dealroom →, the VC firm co-founded by Palantir's former head of global defence.
Valar is building clusters of small modular reactors designed to power energy-intensive sites such as AI data centres. In November 2025, the company said it became the first venture-backed startup to reach criticality — the point at which a nuclear reactor sustains a steady chain reaction — a significant technical milestone. Valar is also part of the US Department of EnergyDealroom has a profile for this one. Try Dealroom →'s Nuclear Reactor Pilot Program.
Why now? AI data centres are consuming electricity at a pace that is straining power grids, and hyperscalers are scrambling for reliable, carbon-free baseload power. Nuclear is increasingly seen as the only energy source that can deliver large volumes of always-on, zero-carbon electricity at the scale AI infrastructure requires. Microsoft, Google, and Amazon have all signed nuclear power agreements in recent years, validating the demand signal that Valar is building toward.
What could go wrong? Small modular reactor technology has not yet been deployed at commercial scale anywhere in the world. Regulatory hurdles for nuclear in the US are lengthy and expensive, and large-scale deployment is widely expected to take decades. Valar's $2 billion valuation — on a technology that has reached criticality but not yet commercial operation — reflects a significant bet on future execution rather than current revenue.
The inclusion of $110 million in debt also signals that the company needs capital-intensive infrastructure financing, not just equity growth funding.
The signal: Nuclear energy's resurgence is being driven less by climate policy than by the raw power demands of AI. Valar's raise reflects a broader convergence of defence tech money, Silicon Valley, and atomic energy.
The defence pedigree of its backers — Luckey built Anduril, Sankar runs strategy at Palantir — suggests Valar is positioning itself not just for commercial data centre power but potentially for defence and national security applications too. The race to power AI may end up reviving an industry that has been largely stagnant for decades.
Sources:
Tech Funding News
Bloomberg
Image credit:
Valar Atomics
J.V.
