Twelve stocks tied to nuclear fuel, uranium mining and small reactors have all rolled over together since February, a synchronized breakdown rare enough to suggest a shared cause. But the businesses behind the tickers are not moving together at all: the two companies with the strongest quarterly results — a uranium miner and a naval-reactor contractor — have fallen the hardest in percentage terms even as their own numbers improved, while the pre-revenue reactor developers whose stocks have collapsed the most were already trading on valuations no amount of selling has meaningfully fixed.

Miners with growing earnings, falling multiples. Cameco, the world's No. 2 uranium miner and 49% owner of reactor-maker Westinghouse Electric, reported first-quarter net income up 88% year over year and held its 2026 production guidance of 19.5-21.5 million pounds of uranium oxide despite a brief spring suspension at its Cigar Lake mine. Its stock fell 29.2% over the three months to July 31 anyway, dragging its trailing price-to-earnings ratio down from roughly 104-117x in May to 79.8x now — a valuation compression happening alongside, not because of, weaker fundamentals. BWX Technologies, whose naval reactor-manufacturing business is a sole-source, security-cleared franchise for the U.S. Navy, grew its backlog to $8.65-8.7 billion (up 77-119% year over year) and posted 26% revenue growth in the first quarter, yet its stock fell 22.3% over the same three months, pulling its P/E from the mid-50s to 42x. Both stocks remain up 12-18% over the trailing twelve months — the multi-month decline has trimmed their 2026 gains, not erased them.

Enrichers and developers: a mixed and mostly unresolved de-rating. Centrus Energy, the sole U.S.-licensed commercial producer of the high-assay low-enriched uranium (HALEU) used in advanced reactors, signed a $900 million fixed-price Department of Energy contract on June 30 for new enrichment capacity at its Piketon, Ohio site, and completed a prior demonstration deal with more than 1,900 kilograms delivered ahead of schedule, per PR Newswire. Its stock still rose 9.1% over the past month even while carrying a downtrend, but its P/E of roughly 62x is little changed from May because 2026 earnings guidance was itself cut about 37%. Uranium Energy Corp, which mined 45,743 pounds of uranium oxide in its latest quarter at an all-in cost of $44.14 a pound per PR Newswire, has seen its price-to-sales ratio fall from roughly 350-373x to about 225x — still far outside any normal anchor for a company with roughly $20 million in quarterly revenue. NuScale Power, the only federally certified small modular reactor design, posted $31.5 million of 2025 revenue, down 15% year over year, with losses widening to about $356 million; its stock has fallen 81% over twelve months, yet its price-to-sales multiple actually rose, to about 161x from 121x, because dilution and declining trailing revenue outpaced the price drop. Oklo, the Sam Altman-backed reactor developer, has a pipeline exceeding 14 gigawatts built mostly on non-binding letters of intent, alongside a binding 12-gigawatt agreement with data-center operator Switch and a Meta prepayment for an Ohio campus, but licensing and first commercial power remain targeted for 2027-2028, per Utility Dive; its stock fell 28% in a single month, per 24/7 Wall St.. Lightbridge, an advanced-fuel developer, has had zero revenue in every quarter since mid-2024, raised $176 million through a drip-feed share sale in 2025, and grew its diluted share count 121% in five quarters to fund a $23-million annual cash burn against $201.9 million in cash.

Funds held up better than the stocks driving the story. Among the five nuclear-themed exchange-traded funds tracked, the Range Nuclear Renaissance fund (NUKZ) fell just 4.3% over the past month and 12.3% over three months — the shallowest drawdown in the group and still up 8.8% over twelve months — while the broader uranium-miner and nuclear funds (URA, URNM, URNJ, NLR) fell 7-9% on the month and 26-31% over three months. VanEck's own research attributes the broader sell-off to macro risk-off sentiment and fading artificial-intelligence-power narratives rather than any change in uranium's physical supply-demand balance, per VanEck. Spot uranium prices consolidated near $84-87 a pound after peaking above $101 in January, while long-term contract prices climbed to a record near $97 a pound, a backwardation more consistent with a healthy physical market than a rolling-over one, per Discovery Alert. The one incremental supply risk flagged by analysts is Kazakhstan's state miner guiding 2026 output up about 9%, which BMO's Alexander Pearce said could put "modest pressure" on prices via a slightly smaller supply deficit, per Mining.com.

Technicals. All twelve tickers held a sustained uptrend through February 2026 before flipping to a sustained downtrend by late July, with Cameco and BWX Technologies breaking that trend on the 90-, 180- and 365-day views simultaneously — a synchronized, gradual rollover rather than a single-name shock, and one that has so far cut into, but not erased, their year of gains.

The setup

Where it stands — Twelve nuclear-linked stocks share a synchronized multi-month downtrend, but Cameco and BWX Technologies' earnings and backlogs grew through it. Would confirm — Cameco's or BWX Technologies' P/E keeps compressing toward pre-2024 levels while their production and backlog guidance still rises next quarter. Would invalidate — Spot uranium prices break decisively below $80 a pound or utility long-term contracting volumes visibly slow in coming quarterly reports. Watch next — NuScale's and Oklo's next quarterly filings for whether letters of intent convert into funded, binding construction contracts. Valuation — Cameco trades at 79.8x trailing earnings versus 104-117x in May; NuScale's price-to-sales rose to 161x from 121x despite an 81% twelve-month price decline.