List of the largest SMR nuclear energy companies by market cap
SMR (Small Modular Reactor) nuclear energy companies represent the next generation of scalable atomic power, enabling carbon-free baseload electricity with enhanced safety features. They are primarily traded on exchanges like the New York Stock Exchange (NYSE) and NASDAQ, critical platforms for advanced energy investments. Despite regulatory complexities, the SMR sector, led by innovative engineering firms, offers investors access to companies developing factory-built reactors for utilities and industrial applications.
Advanced energy exchanges are not just platforms for reactor designers; they facilitate capital deployment into the $300B+ emerging SMR market. The main advantages of investing in SMR stocks include:
- Decarbonization enablers: Companies providing 24/7 zero-emission power with 90% smaller footprints than conventional nuclear plants.
- Core technology approaches: Light-water reactors (NuScale), fast neutron designs (TerraPower), molten salt systems (Terrestrial Energy), and microreactors (BWX Technologies).
- Scalability advantages: Factory-fabricated modules reducing construction timelines from 10 years to under 36 months.
Industry pioneer NuScale Power achieved the first-ever SMR design certification in 2023 for its 77MWe VOYGR modules, with 19 planned deployments across 11 countries. Together with TerraPower (backed by $2B in U.S. DOE funding), they lead the sector, with NuScale’s first commercial project scheduled for 2029 operation. Investing in SMR stocks provides exposure to companies addressing 15% of global electricity demand through 2040.
Leading SMR developers are engineering innovators. GE Hitachi’s BWRX-300 requires 60% less concrete than traditional reactors, while Rolls-Royce SMR’s 470MWe design achieves 90% factory completion. Terrestrial Energy’s IMSR uses walk-away safety systems eliminating meltdown risks. This innovation explains why global SMR deployment is projected to reach 21GW by 2035. Beyond energy, the sector includes 3 of the world’s 5 most advanced nuclear technologies: NuScale VOYGR, TerraPower Natrium, and GE Hitachi BWRX-300.
Regulated brokerThe following table contains a list of the leading SMR nuclear energy companies by market capitalization, primarily traded on NYSE/NASDAQ (including pure-play developers and industrial conglomerates with significant SMR divisions). The list includes only publicly traded companies, and the presented data (price, market cap) are regularly updated to reflect the current market situation.
| Stock | Price | Change % | Marketcap |
|---|---|---|---|
 Cameco CCJ | $83.47 | 0.47% | 37.06B |
 BWX Technologies BWXT | $187.23 | 1.55% | 17.11B |
 Oklo OKLO | $115.86 | 3.79% | 17.10B |
| $9.08 | 1.40% | 5.28B | |
| $36.61 | 1.69% | 5.17B | |
| $12.98 | 2.70% | 6.18B | |
| $330.31 | 6.53% | 5.92B | |
| $2.77 | 0.55% | 2.50B | |
| $39.11 | 1.43% | 1.66B | |
 Energy Fuels UUUU | $15.68 | 2.12% | 3.92B |
| $3.18 | 0.93% | 594.96M | |
 ASP Isotopes ASPI | $9.09 | 5.51% | 915.31M |
Ur Energy URG | $1.76 | 1.75% | 641.62M |
Uranium Royalty UROY | $4.27 | 0.70% | 570.63M |
| $20.49 | 3.39% | 611.43M | |
| GBp1,177.00 | 1.09% | 97.91B |
