The first sustained nuclear buildout in fifty years runs through a six-layer supply chain: from uranium pulled out of the ground, through enrichment and fuel fabrication, into the reactors themselves, old fleet, new fleet, and the small-modular generation moving through regulatory review. Below: the public US-listed companies operating in each layer.
Source at the apex. Grid at the foundation. Every US-listed public company actually operating in between.
The miners pulling yellowcake U3O8 out of Saskatchewan, Wyoming, and Niger. Spot uranium has tripled since 2020 on supply discipline and reactor restart commitments, these are the producers and developers selling into that market.
Conversion of U3O8 into UF6, enrichment to reactor grade, and the high-assay low-enriched uranium (HALEU) needed for next-generation reactors. The bottleneck the whole industry is trying to clear.
Public companies developing reactor designs in the 1–300 MW range. Several have NRC pre-application activity or DOE demonstration funding; first commercial operations are targeted for the late 2020s and early 2030s.
Engineering, procurement, and construction contractors with nuclear-grade qualifications, the firms actually capable of bidding on AP1000, EPR, and SMR site work in the United States and allied countries.
The regulated and merchant utilities operating the existing US reactor fleet, plus the ones with announced plans to restart retired units or co-locate SMRs with hyperscaler data centers. Long-duration contracted cash flow.
The interconnect, transmission, and storage layer that any new nuclear capacity has to land into. Gas turbine OEMs, transmission EPC, and long-duration battery integrators, every megawatt of nuclear needs grid to absorb it.
Constituent lists are reviewed quarterly against revenue mix, segment disclosures, regulatory filings, and stated capex commitments. Quotes are sourced from licensed market data; the Veridion Score is computed from six published factors. Inclusion is not a recommendation.