Short version: OKLO and SMR are both small-cap nuclear plays riding the AI-Power thesis, but they sit at different points on the deployment curve. NuScale (SMR) has NRC Design Certification and a more advanced regulatory position. Oklo (OKLO) is earlier-stage but targeting a faster-to-market micro-reactor model. This is a research comparison — not a recommendation.
Quick comparison table
All data is approximate and drawn from public SEC filings, NRC dockets, and company investor materials. Verify on your broker terminal before any sizing decision.
| Metric | OKLO (Oklo Inc.) | SMR (NuScale Power) |
|---|---|---|
| Exchange | NYSE | NYSE |
| Reactor type | Compact liquid-metal-cooled fast reactor | Small modular pressurized water reactor (PWR) |
| Flagship product | Aurora powerhouse (15–50 MWe) | VOYGR module (77 MWe per module) |
| NRC status | Combined License Application (COLA) under review | NRC Design Certified (2023) |
| First commercial deployment | Idaho National Laboratory (Aurora-INL) | Romania (VOYGR-6 project) |
| Approx float | ~100M shares | ~225M shares |
| Approx avg daily volume | ~15M shares | ~8M shares |
| Revenue stage | Pre-revenue | Pre-revenue |
| Hyperscaler exposure | Disclosed LOIs/MOUs with data center customers | Utility-led deployments + cloud provider discussions |
1. Technology — different reactor philosophies
Oklo (OKLO) is developing the Aurora powerhouse, a compact liquid-metal-cooled fast reactor designed for small (15–50 MWe) on-site deployments. The bet is that smaller, factory-fabricated reactors can be deployed faster than traditional large reactors — especially at data center sites where 24/7 baseload power is critical.
NuScale (SMR) is developing the VOYGR small modular reactor, a 77 MWe pressurized water reactor module that can be scaled in 4-, 6-, or 12-module deployments. NuScale received its initial NRC Design Certification in 2023, making VOYGR the first SMR design certified by the U.S. Nuclear Regulatory Commission. This is a meaningful regulatory moat.
2. Regulatory position — SMR is further along
This is the most material difference between the two names today. NuScale’s NRC Design Certification means individual project deployments still require Combined License Applications, but the core design has already been vetted. Oklo is still working through the COLA process for its first deployment, with pre-application engagement underway.
For a public-information trader, this matters because:
- SMR’s regulatory milestones are mostly incremental (project-level approvals)
- OKLO’s regulatory milestones can be step-function events (initial license acceptance, request-for-information cycles, eventual approval)
Step-function events tend to create bigger single-day moves — in both directions.
3. Catalyst calendars
Both names have similar quarterly cadence (10-Q earnings) but different catalyst types between earnings:
OKLO catalyst types tracked:
- NRC COLA review milestones (acceptance, RFIs, scheduling)
- Data center off-take agreements (LOI → binding PPA conversions)
- DOE / DARPA award announcements
- HALEU fuel supply chain progress
SMR catalyst types tracked:
- VOYGR project deployment milestones (Romania + future sites)
- Customer LOI/MOU announcements (utility consortiums, hyperscalers)
- DOE Advanced Reactor Development program updates
- Module manufacturing partnerships (Doosan, etc.)
For detailed catalyst calendars, see the OKLO research profile and the SMR research profile.
4. Risk profile comparison
Both names share several risks specific to pre-revenue nuclear developers:
- Dilution risk — both have used equity issuance to fund operations and are likely to continue
- HALEU fuel supply constraint — high-assay low-enriched uranium is a sector-wide bottleneck
- Sector sentiment volatility — correlated with broader AI-Power narrative flows
Risks that are more pronounced for each:
- OKLO-specific: NRC licensing risk is heavier (still in COLA process); pre-revenue with smaller disclosed customer base
- SMR-specific: Larger float can dampen catalyst-driven price moves; reliance on a small number of named deployment projects (Romania, US Department of Energy sites)
5. Float / volume profile
OKLO has a smaller float (~100M vs SMR’s ~225M) and higher relative daily volume (~15M vs ~8M). That means OKLO tends to move more on catalysts than SMR — both up and down. SMR’s larger float provides more liquidity but also dampens single-catalyst price action.
6. How they sit in the AI-Power thesis
Both names sit upstream of the AI-Power thesis — providing 24/7 zero-carbon baseload power to feed hyperscaler datacenter capex. The thesis-level question isn’t which is “better” but whether the broader US power-demand narrative continues to drive sector attention.
For the full thesis, read the AI-Power Stocks Playbook.
Investor takeaway
This isn’t a “pick one” question — OKLO and SMR are positioning differently within the same advanced-reactor cohort:
- OKLO is the higher-volatility, smaller-float, earlier-stage play with step-function regulatory catalysts ahead
- SMR is the larger-float, more advanced regulatory position with incremental deployment catalysts
Stock Ships does not issue buy/sell recommendations or price targets. The scan grades on each research profile reflect screening criteria only, not a recommendation to take any specific action. Both names carry substantial risk and pre-revenue uncertainty.
Related research
- OKLO Stock research profile — full catalyst calendar, scan grades, risks, FAQ
- SMR Stock research profile — full catalyst calendar, scan grades, risks, FAQ
- UEC Stock research profile — uranium supply chain exposure
- AI-Power Stocks Playbook 2026 — the full thesis framework
- Undervalued Micro-Cap Stocks 2026 Watchlist — catalyst-driven names across sectors
Disclosure
See full disclaimer.