Aalo Atomics
🇺🇸 Austin, US · Founded 2023 · Active
Aalo Atomics is a company in Austin, Texas, founded in 2023 to build factory-made nuclear power plants for data centres. Its Aalo-1 reactor is rated 30 MWt and 10 MWe, is cooled by liquid sodium at near-atmospheric pressure, is moderated by graphite and uses uranium dioxide fuel enriched to 8%. The planned Aalo Pod groups five of these reactors, sharing turbines, for 50 MWe. The company says it has raised more than $300 million and that on 3 July 2026 a zero-power test reactor it built at Idaho National Laboratory reached initial criticality, a self-sustaining chain reaction. For its first power reactor, the experimental Aalo-X, it contracted fuel rods from Global Nuclear Fuel and a steam turbine from Baker Hughes (World Nuclear News, March 2026).
- Sector
- Fission
- Technology
- Liquid-metal cooled
- Fuel
- LEU+ (5–10% U-235)
- Role
- Reactor developer
Its recorded equity, $133m, is the 16th largest of the 25 organisations with a priced round here. Not every round is on record, so this is not its total raised.
Terms
- Liquid-metal cooled
- Reactors cooled by molten metal at near-atmospheric pressure. Most designs use no moderator, so the neutrons stay fast. A few do slow their neutrons: Aalo Atomics describes its sodium-cooled Aalo-1 as a thermal reactor, and the IAEA lists Idaho National Laboratory's MARVEL microreactor as liquid-metal-cooled with a thermal spectrum.
- LEU+ (5–10% U-235)
- Uranium enriched to between 5% and 10% uranium-235, the band the World Nuclear Association and the industry call LEU+. It lies inside the HALEU range, but is tracked separately for a concrete reason: US security rules place uranium below 10% enrichment in the lightest category (Category III) whatever the quantity, while 10 kg or more of uranium-235 in uranium enriched to 10% or more falls in Category II, which needs heavier protection. A design that stays under 10% therefore carries materially lighter security requirements. Aalo Atomics's fuel at roughly 8% uranium-235 is the reference case: the company calls it 'LEU' in its own materials, but by the 5 to 20% HALEU definition it is HALEU, in the LEU+ band.
Funding
- 2025-08-19Equity round · Series BSeries B of $100 million, announced as closed on 19 August 2025, led by Valor Equity Partners.$100m
- 2024-08-14Equity round · Series ASeries A of $27 million, announced 14 August 2024 and closed the previous month.$27m
- 2023-04-11Equity round · SeedSeed round of $6.26 million in equity, announced 11 April 2023, led by Fifty Years with Valor Equity Partners participating.$6m
Designs
| Design | Developer | Approach | Electrical output per unit | Size class | Licensing stage |
|---|---|---|---|---|---|
| Aalo-1 Aalo-1 Reactor | Aalo Atomics | Liquid-metal cooled | 10 MWe planned | Microreactor | No milestone recorded |