SMR Stock Plunge: Short Sellers Profit as UK Watches Nuclear Investment Trends
Executive summary
Short sellers have earned over $2 billion betting against US-listed small modular nuclear reactor (SMR) companies, as their share prices fell dramatically after an initial 'hype cycle'. These companies, largely loss-making with minimal revenue, had seen investment interest from AI hyperscalers but now face scrutiny over long development timelines and high capital expenditure.
Reporting based on ft.com
Why it matters
The challenges faced by US SMR firms, including significant market value drops and investor scepticism, offer a cautionary tale for the UK. With the UK government backing SMR development as a key part of its future energy strategy, this report highlights the financial risks and long-term horizons associated with the technology, particularly in attracting private investment to meet the anticipated power demands of AI infrastructure.
Sector impact
Analysis by AI Energy Intelligence UK
The article reports that US data centre power demand is projected to rise from 34.7 gigawatts in 2024 to 106 gigawatts by 2035, partly due to AI hyperscalers. These large technology companies are seeking new power sources, including emergent SMR technology, to meet this growing demand, indicating a direct link between AI infrastructure expansion and the need for new energy generation.
The article highlights that SMRs are considered a potential solution for future power needs, with AI hyperscalers showing interest in the technology. However, concerns over long delivery timelines for these unproven reactors and potential shortages of vital high-assay low-enriched uranium (HALEU) fuel suggest that SMRs, despite their promise, may not provide immediate or certain contributions to energy security in the near term.
The SMR sector has seen significant market volatility, with US-listed companies experiencing a collective $30.3 billion wipe-off their market value since October last year. Investment firms like ARR Investment Partners have noted the shift in sentiment, highlighting that companies with almost zero revenue for the foreseeable future and high capital expenditure requirements are now viewed more critically.
Key statistics
Figures as reported by ft.com. See original source for context.
Quotations
"The stocks were overinflated in price, based on speculation"
"[It is] very typical of a company that is in this early pre-consistent-revenue phase."
"On the one hand there was some support from the government, and no one wants to bet against Trump, and on the other there was this whole AI [demand] story which everyone was really bullish about [last year]"
"The sentiment has changed this year, people are far more critical"
"What we have seen in 2025 seems to me like an industry bubble that is already deflating"
Long-term implications
The market's 'hype cycle' for SMRs, followed by a significant correction, suggests that while the technology attracts interest, particularly from power-hungry AI sectors, the commercialisation path is lengthy and capital-intensive. This indicates a sustained period of investment and regulatory navigation will be required before SMRs can deliver consistent revenue or widespread energy contributions, pushing their significant impact into the 2030s.
Frequently asked questions
What is happening with SMR stocks?
Share prices of US-listed small modular nuclear reactor (SMR) companies have tumbled, leading short sellers to profit over $2.1 billion. This follows a period of inflated prices driven by speculation and interest from AI hyperscalers.
Why did SMR stocks initially surge?
SMR stocks surged due to growing investor interest in nuclear energy from AI hyperscalers seeking power sources, as well as regulatory changes and funding announcements from the Trump administration.
What are the main concerns about SMR companies?
Concerns include the companies being loss-making with little to no revenue, long build-out timelines for the technology, high capital expenditure requirements, and the unproven nature of many designs.
How much market value has been lost by SMR companies?
A total of $30.3 billion has been wiped off the collective market value of three SMR companies (NuScale Power, Nano Nuclear, and Oklo) since their peak in October last year.
What is the connection between SMRs and AI?
AI hyperscalers are increasingly turning to emergent SMR technology to meet soaring energy demand from power-hungry data centres. Meta, for example, made an upfront cash injection to support SMR development.
What are the timelines for SMR deployment?
The earliest some SMRs might come online is mid to late 2028, but the majority are expected to arrive during the 2030s, if manufacturers can speed up delivery and satisfy regulators.
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Original source
This story summarises reporting from ft.com. Read the original for full context.
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