Compare nuclear operators, uranium and fuel suppliers, and reactor businesses. Nuclear Energy Stocks are U.S.-listed companies involved in nuclear electricity generation, uranium and fuel supply, or reactor technology and equipment. This page ranks 7 of them by market capitalization. Together they are worth about $153.63B, roughly 0.16% of tracked market cap on MarketCapLens. Figures update daily; as of November 12, 2026.
+169.76%
4 of 7 names, Nov 2021–Nov 2026. Young listings are omitted from this aggregate, not from current combined cap.
Scroll sideways for more metrics. Company names stay visible.
| Constellation Energy CorporationCEG | $97.34B | 63.36% | $274.73 | +2.60% | -21.88% | |||
| Cameco CorporationCCJ | $32.37B | 21.07% | $74.32 | +1.99% | -19.67% | +169.76% | +195.36% | |
| BWX Technologies, Inc.BWXT | $11.52B | 7.50% | $125.68 | -0.76% | -35.76% | +141.37% | +140.18% | |
| Oklo Inc.OKLO | $5.05B | 3.29% | $25.86 | +3.09% | -75.19% | |||
| Uranium Energy Corp.UEC | $3.58B | 2.33% | $7.23 | +0.84% | -41.69% | +31.69% | +142.84% | |
| Centrus Energy Corp.LEU | $2.21B | 1.44% | $112.17 | +2.09% | -59.29% | +40.19% | +108.50% | |
| NuScale Power CorporationSMR | $1.56B | 1.02% | $5.23 | +0.19% | -80.44% |
Click a column to sort. Returns are share-price changes (excluding dividends); 5-year cap growth is the change in market capitalization over the period. % of group is each company's share of this list's combined market cap. As of November 12, 2026.
Business roles explain membership; companies can span several businesses.
The group’s combined market capitalization over time, stacked by company so you can see each member’s contribution to the total.
Monthly history for 7 of 7 companies · Nov 2021–Nov 2026.
Companies enter the chart when their available market-cap history begins. New listings and spin-offs can change the total alongside changes in existing companies’ market caps.
Each line shows the share-price change since May 2024, excluding dividends. 0% means no change; +100% means the price doubled, and +200% means it tripled. This is a common comparison window based on the available history of eligible members.
Chart coverage: 7 of 7 companies · May 2024–Nov 2026.
All lines use the same starting date. Five-year return columns still require five years of history.
We select U.S.-listed businesses with a substantial role in nuclear electricity generation, uranium mining or fuel services, nuclear equipment, or reactor development. The list deliberately separates operators, fuel suppliers, and technology developers by business role. Market cap covers the whole listed company, including non-nuclear operations; it is not a valuation of the nuclear segment. Companies must also appear in the current site ranking. Price and market-cap history before the documented public listing of the current business is excluded.
Business and membership references:
An operating electricity business and a reactor developer are at different stages. Business roles make that distinction visible without changing the market-cap calculation.
Uranium supply, enrichment services, electricity prices, and customer contracts can affect different members in different ways.
Licensing, construction, financing, and project execution can take years. Market cap reflects investor expectations as well as existing operations.
Nuclear Energy Stocks are U.S.-listed companies involved in nuclear electricity generation, uranium and fuel supply, or reactor technology and equipment. This page tracks Constellation Energy Corporation, Cameco Corporation, BWX Technologies, Inc., Oklo Inc., Uranium Energy Corp., Centrus Energy Corp., and NuScale Power Corporation. Together they are worth about $153.63B, roughly 0.2% of tracked market cap on this site.
The list covers Constellation Energy Corporation (CEG), Cameco Corporation (CCJ), BWX Technologies, Inc. (BWXT), Oklo Inc. (OKLO), Uranium Energy Corp. (UEC), Centrus Energy Corp. (LEU), and NuScale Power Corporation (SMR).
As of 2026-11-12, they have a combined market capitalization of about $153.63B — around 0.2% of tracked market cap here.
Led by Constellation Energy Corporation (CEG). Informational only; not investment advice. See our disclaimer.
Over the past five years, Cameco Corporation (CCJ) has the largest share-price return on this list, about +169.76%. That is a dated price path, not a pick.
It uses 4 of 7 names present from Nov 2021 to Nov 2026. Newer listings stay in current combined cap and the stacked chart but are omitted from that aggregate.
No. Uranium suppliers are one part of the nuclear chain. This list also includes electricity generation, fuel services, nuclear equipment, and reactor development.
No. Developers can depend on licensing, financing, construction, and future commercialization. An operator has an existing electricity business. Whole-company market caps should be read with those differences in mind.