Five stocks carry most of the market's nuclear enthusiasm: Cameco (CCJ +4.03%), Centrus Energy (LEU +7.49%), Oklo (OKLO +14.77%), NuScale Power (SMR +3.70%), and Nano Nuclear Energy (NNE +7.04%). Expand NYSE : CCJ Cameco Today's Change ( 4.03 %) $ 3.77 Current Price $ 97.39 Key Data Points Market Cap $42B Market cap calculated using publicly traded shares outstanding only. Expand NYSE : LEU Centrus Energy Today's Change ( 7.49 %) $ 13.34 Current Price $ 191.37 Key Data Points Market Cap $3.8B Market cap calculated using publicly traded shares outstanding only. Expand NYSE : OKLO Oklo Today's Change ( 14.77 %) $ 6.23 Current Price $ 48.42 Key Data Points Market Cap $8.4B Market cap calculated using publicly traded shares outstanding only. So if I wanted nuclear exposure today, I'd start with the two companies that already sell fuel: Cameco and Centrus.