Oklo, based in Santa Clara, California and listed on the New York Stock Exchange, designs the Aurora powerhouse, a sodium-cooled fast reactor. It broke ground on its first Aurora unit at Idaho National Laboratory in September 2025, under the Department of Energy's reactor pilot programme.
At a glance
| Price from | Custom |
| Best for | Data centres and industrial sites wanting small on-site reactors |
From Oklo's own website.
What stands out
- Construction under way in Idaho
- Also developing fuel recycling
Worth knowing
- Earlier NRC licence application was denied
- No commercial NRC licence yet
How it ranks
Oklo is ranked 8th of 10 in Best Small Modular Reactor Companies (Lister Score 88.3).
#8 in Best Small Modular Reactor Companies · Lister Score 88.3
Oklo broke ground on its first Aurora powerhouse at Idaho National Laboratory on 22 September 2025..
| Rank | Best Small Modular Reactor Companies | Score |
|---|---|---|
| 1 | GE Vernova Hitachi Nuclear Energy | 97.2 |
| 2 | NuScale Power | 95.9 |
| 3 | TerraPower | 94.8 |
| 4 | Rolls-Royce SMR | 93.6 |
| 5 | Kairos Power | 92.3 |
| 6 | X-energy | 91.0 |
| 7 | Holtec International | 89.7 |
| 8 | Oklo | 88.3 |
| 9 | Westinghouse | 86.9 |
| 10 | Aalo Atomics | 85.4 |
Frequently asked questions
How does Oklo rank on Lister?
Oklo is ranked 8th of 10 in Best Small Modular Reactor Companies (Lister Score 88.3).
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