Uranium ETF slips 1.7% as nuclear equity rally cools; HALEU supply chain becomes the differentiator
Nuclear stocks face a split market: reactor developers sell off while fuel suppliers hold premiums, with AI power demand as the backdrop.
The uranium ETF (URA) closed at $45.70 on Sunday (2026-08-23), down 1.7%, while the broader AI power complex showed mixed signals. The move extends a pattern from earlier this year, when nuclear names lost nearly 10% in a single session on Monday (2026-05-18), only to recover sharply afterward.3
That volatility cuts to the core question for investors: which nuclear companies actually have the contracts, fuel supply and regulatory approvals to match AI data center demand. The sector's 2025 run, which included Oklo gaining 186% year-to-date, has given way to a more selective market in 2026.3
Capital is rotating into energy companies that can supply power for AI data center buildouts, with nuclear and renewable baseload generation offering the cleanest solutions. Fluence Energy illustrated the appetite in May: shares closed at $24.16 on May 8, 2026, up 98.2% in a single week after the company disclosed master supply agreements with two hyperscalers and a record $5.6 billion backlog.1
But Fluence's trajectory also shows the risk. Shares are down roughly 39% year to date, leaving this micro-cap in turnaround territory despite the Q1 2026 positive adjusted EBITDA of $2.0 million, its fourth consecutive quarter in the black, with non-GAAP gross margin expanding to 52%.1
Nuclear stocks slumped in the first half of 2026 after strong performance in 2025, and the long-term tailwinds remain in place as countries worldwide commit to tripling nuclear energy. Yet the market has started distinguishing between developers with near-term revenue and those with promises.5
Centrus Energy holds a 5.8% weighting in nuclear-focused funds, and it stands apart as one of the few companies that has received regulatory approval to produce high-assay low-enriched uranium, the HALEU fuel that next-generation reactors require. NuScale Power and Oklo each hold a 4.5% and 4.3% weighting, respectively.6
Fuel supply is where the sector's fundamentals get concrete. Cameco's Cigar Lake facility produces the world's highest-grade uranium and has produced more than 155 million pounds since going online in 2015. Cameco's operations there have produced 567.9 million pounds from the largest high-grade uranium mine and mill in the world.2
Oklo recently acquired Atomic Alchemy, expanding its capabilities beyond selling small modular reactors. That deal positions the company to capture more of the fuel cycle, but it also raises execution risk at a time when investors are punishing missed timelines.7
The DeepSeek news in May triggered a sector-wide selloff, but in retrospect it was a buying opportunity, as some names gained over 100% year-to-date. The lesson traders took: AI-driven power demand headlines create sharp entry points, but only for names with actual offtake agreements.3
BWX Technologies serves defense and commercial nuclear markets, known for naval nuclear reactors and nuclear components. It offers a different risk profile than the SMR developers, with government contracts providing revenue visibility that merchant power plays lack.4
The divergent performance between fuel suppliers and reactor developers is the market's way of pricing regulatory reality. Centrus has HALEU approval, Cameco has producing mines, and both have revenue. NuScale and Oklo have designs, regulatory pathways and fund weightings, but their commercial-scale revenues remain ahead of them.6,7
The first half of 2026 showed these stocks can fall hard and fast. The question is whether the next leg up is broad, or concentrated in the names with fuel, contracts and approvals. Watch Centrus for HALEU purchase commitments from reactor developers, and watch Oklo's progress converting its acquisition into revenue. Those will set the tone for the whole sector.5,7