Oklo Climbs 5% and NuScale 4% as Nuclear Developers Bounce From Late-August Selloff
Reactor developers recoup some losses but remain down more than 30% for the year as the uranium mining complex moves in the opposite direction.
Oklo gained 5% on Tuesday (2026-09-22), leading a partial recovery across nuclear-linked equities after a bruising stretch for the sector, with NuScale Power adding 4% and Uranium Energy climbing 3%. The Global X Uranium ETF moved in the opposite direction, falling 0.49% to $42.98 in the same session — a divergence that has run through the sector for most of 2026.5
The year-to-date numbers put Tuesday's (2026-09-22) move in context. NuScale had shed 35% since January and Oklo 42% through Wednesday (2026-08-26), leaving both names sharply below their 2026 opening levels. Uranium Energy held a 12% year-to-date gain over the same period.5 Producers with commodity revenue have weathered 2026 far better than companies still years from first revenues.
The same split appeared during a comparable bounce on Wednesday (2026-08-26), when the SPDR S&P 500 ETF Trust rose 0.5% to $769.63 and NuScale jumped 4% to $9.65 as Oklo gained 3% to $42.76. The uranium ETF barely moved that session.5 Both developer names moved at multiples of the broad tape, confirming their high-beta character on positive sessions as much as negative ones.
Both Oklo and NuScale are pre-commercial, spending capital for years before any reactor generates revenue. That structure makes them acutely sensitive to the interest-rate environment. Rate anxiety drove NuScale and Oklo down 5% each on Thursday (2026-08-20), pulling the uranium ETF down 3% alongside.3 When investors reprice long-duration assets, pre-commercial power developers take disproportionate hits.
The AI demand narrative has drawn significant capital to the sector, with data centers requiring firm, round-the-clock baseload power that intermittent renewables cannot consistently deliver. Hyperscaler offtake agreements have been repeatedly cited as evidence of real demand. But the market is growing impatient with announcements alone. In late August (2026-08-26), NuScale fell 7% on the day it disclosed deploying AI tools in its operations — a genuine operational step that failed to hold investors.4 Software improvements in operations do not substitute for physical reactors producing power.
Truist analyst Christopher Souther said in July (2026-07-16) that investors are increasingly demanding evidence these companies can build, license, and deploy reactors rather than advance the pipeline on paper.2 The sector's first-of-a-kind projects are moving from concept to execution, Souther said, but execution in nuclear means regulatory approvals, construction financing, and grid interconnection agreements, a timeline that plays out over years.
Uranium carries its own cyclical risks. BNN Bloomberg noted in June (2026-06-22) that prices drawing capital into the sector can reverse sharply, and the commodity has a history of corrections after bull runs.1 The Global X Uranium ETF fell 0.49% to $42.98 on Tuesday (2026-09-22) while the developer names recovered 4-5%, suggesting the physical uranium complex is not confirming the equity bounce.
Tuesday's (2026-09-22) moves leave Oklo and NuScale still deeply negative for the year, the cumulative selloff since January far exceeding any single-day recovery. Licensing approvals, construction financing closes, and signed hyperscaler offtake agreements remain the execution milestones the sector still needs to demonstrate.2