JSC TENEX (Rosatom State Atomic Energy Corporation)
TENEX is the commercial arm of Rosatom State Atomic Energy Corporation for uranium enrichment services and nuclear fuel exports. TENEX is responsible for enrichment contracts with Western utilities and has historically supplied ~35–40% of enrichment services consumed by US and European nuclear power plants, and approximately 40% of global enrichment capacity when combined with ROSATOM's domestic operations. TENEX operates centrifuge enrichment cascades at four Russian sites (Novouralsk, Zelenogorsk, Seversk, Angarsk) with total capacity ~26.5 million SWU/year — the world's largest enrichment capacity under a single organization. Subject to US Prohibiting Russian Uranium Imports Act (signed May 13, 2024), prohibiting Russian LEU imports into the US from August 2024 (with waiver period through January 2028).