NuScale jumps 15% as nuclear investors await a 2026 milestone

NuScale Power (NYSE: SMR) climbed more than 15% in a single session last week, a move that arrived without a company announcement, an analyst upgrade, or any filing to explain it — leaving the small modular reactor developer's next company milestone as the only identifiable trigger for the repricing.

The absence of news is itself the story. NuScale has not published a material update on its order book since its Romanian front-end engineering and design work wound down in late 2025, and the company has not yet disclosed the timing or content of the milestone that investors appear to be trading toward. "There was no obvious reason for NuScale's stock to spike," the company's own coverage noted, adding that the jump may reflect "renewed interest in small modular reactor developers" rather than anything specific to NuScale.

Peer price action supports the sector-flow reading. Oklo (NYSE: OKLO) rose 7% in the same stretch, a smaller move that nonetheless points to money entering the SMR group rather than a single-name event. Both stocks were rebounding from a long decline: even after the rally, NuScale remains down 28% this year and Oklo is down roughly 44%.

The scale of the move matters more than its direction. NuScale went public through a SPAC merger on May 3, 2022, opening at $10.70, and peaked at a record $53.43 on Oct. 15, 2025. It now trades near $10, with a market capitalization of about $4.2 billion — roughly 169 times this year's expected sales. Analysts expect full-year 2026 revenue to fall 21% to $25 million alongside a net loss of $181 million, a decline driven by the end of the RoPower FEED work that had supplied most of the company's top line.

The milestone has to answer the order-book question

NuScale's technology is a 77 MWe pressurized light-water module, factory-fabricated and assembled on site, with multiple units combinable into a higher-capacity plant. A conventional nuclear plant typically generates more than 1,000 MWe, which is why SMRs have historically lost on cost per megawatt: bigger reactors are cheaper to build per unit of output, and for two decades U.S. electricity demand grew slowly enough that speed and upfront financing were not priorities. Only two SMR systems have ever been built.

That calculus has inverted. AI data-center construction is pulling power demand up faster than the grid can absorb, and the constraint is now time-to-power rather than lifetime cost. The milestone NuScale investors are waiting on is the one that converts that demand into signed, firm customer orders — the same gap UBS flagged on Sept. 11, 2026, when it cut the stock to Sell from Neutral and slashed its price target to $6 from $10. NuScale fell 13.2% that day. UBS's argument was that the company is "a first mover no more," with peers making tangible commercial progress while NuScale's path to firm orders gets harder.

The company's execution record is the reason that argument lands. NuScale canceled its flagship U.S. commercial deployment in Idaho in 2023 and pushed its first Romanian reactor deployments from 2030 to 2033. Fluor (NYSE: FLR), which had partnered on the Romania work and owned more than half of NuScale's shares before the public debut, liquidated its entire position earlier this year.

Nuclear's demand story is real; NuScale's share of it is not yet

The sector tailwind is not in dispute. Nuclear has become the default answer to the AI power bottleneck, and the enthusiasm has lifted the entire group — including companies with no SMR exposure at all. BWX Technologies (NYSE: BWXT), the only large-scale North American manufacturer of specialized nuclear components, fuel systems, and naval reactor systems, ended 2025 with a $7.3 billion backlog, up 50% from a year earlier. Its revenue grew from $2.1 billion in 2021 to $3.2 billion in 2025, an 11% compound annual rate, and analysts project 12% revenue and 16% EPS growth annually from 2025 to 2028. BWX also supplies engineering support to SMR developers, giving it exposure to NuScale's market without NuScale's order-book risk.

The valuation gap is the cleanest way to frame the trade. BWXT trades at $153 per share, a $14 billion market cap, four times this year's sales and 35 times this year's earnings. NuScale trades at 169 times this year's sales while generating a fraction of the revenue and no profit. That spread is a bet on the milestone: if NuScale converts its pipeline into firm orders, the multiple has something to stand on; if the milestone slips again, the 15% rally is a bounce inside a 28% annual decline, and the stock's next reference point is UBS's $6 target rather than its $53.43 record.

For investors, the actionable distinction is between the nuclear demand theme and NuScale's ability to monetize it. The theme is priced into BWXT, Oklo, and the wider group. NuScale's premium requires a company-specific event that has not yet been dated or described. Until it is, the 15% move is positioning ahead of a catalyst rather than a repricing of one — and the company's own disclosure calendar, not the sector's sentiment, is what determines whether it holds.

This article is for informational purposes only and does not constitute investment advice.