Silex led on its laser-enrichment milestone while the data-center-power complex sold off with tech — Solstice Advanced Materials −6.4% the laggard, Talen and Constellation dragging.

Silex Systems (SILXY) led the nuclear basket on Wednesday, its ADR up 5.4% to $19.30, on the strength of its enrichment platform. Silex owns the SILEX laser-separation process — the third-generation enrichment technology behind Global Laser Enrichment, its venture with Cameco — and having just completed the world's first laser-based silicon plant, it has demonstrated the same core physics that its uranium program depends on. On the enrichment-and-HALEU chokepoint, that matters now: the termination of Russian low-enriched-uranium import waivers is pulling Russian material out of the US fuel cycle, and any credible Western enrichment capacity commands a scarcity premium. On a risk-off session, a process-technology owner insulated from the day's growth-stock unwind stood out.

Solstice Advanced Materials (SOLS) was the laggard, down 6.4% to $82.95. Spun out of Honeywell only last October and still finding its shareholder base as the group's three-way separation concluded in late June, Solstice sits on the conversion-and-deconversion chokepoint — the specialty fluorine chemistry and materials that uranium conversion and fuel handling rely on. There was no clean company-specific catalyst to date to Wednesday; the move reads as post-separation index churn in a thin, newly independent name amplified by a broadly risk-off tape, not a repricing of the conversion thesis.

The more thematic weakness was in the power complex, which sold off in lockstep with the tech tape that dragged the data-center-electricity trade. On the restarts-and-utilities chokepoint, Talen (TLN) fell 6.1% to $360.79 and Constellation (CEG) −4.8% to $236.50, with Vistra (VST) −3.4% and GE Vernova (GEV) −3.4% alongside — the same IPP-power names that lagged in the compute basket, confirming this was capital leaving the power premium, not a nuclear-specific event. Cameco (CCJ) −4.4% to $97.39 and Fluor (FLR) −3.9% softened the fuel and EPC nodes. The offsetting bid was in physical uranium and the upstream: enCore Energy (EU) +3.8%, Sprott Physical Uranium (SRUUF) +2.9%, and Japan Steel Works (JPSWY) +2.7% on the forgings-and-components chokepoint, with SMR platforms mixed (NuScale +1.2%, Oklo +0.2%).

The catalyst path runs through fuel security and earnings. Watch the NRC's final Environmental Impact Statement and Safety Evaluation Report for the GLE Paducah facility — the regulatory gate for domestic laser enrichment — against the backdrop of the Russian-LEU waiver termination. The Q2 wave then opens the operator picture: Cameco (with its Westinghouse equity contribution), Constellation, Talen, and NextEra on the utilities node, plus Oklo and NuScale on SMR platforms, alongside the DOE reactor-pilot-program criticality deadline and the World Nuclear Symposium (London, Sept 9–11).