Energy bills across the UK are under pressure as European oil import costs rise sharply, so reliable low carbon power suddenly looks far more valuable. That puts fresh attention on British nuclear energy stocks, which sit at the crossroads of security of supply and climate goals. This article walks through three UK listed nuclear focused companies from our screener and explains how each could fit a long term portfolio.
The three stocks highlighted here offer a compelling starting point if you want exposure to uranium producers, fuel cycle players and reactor operators focused on reliable low carbon power. However, if you want the names that matter most, these 15 nuclear renaissance stocks are the strongest companies we’ve found.
Overview: Rolls-Royce Holdings designs nuclear powered submarine reactors within a broader business that supplies mission critical aero engines and onsite power systems worldwide.
Operations: Rolls-Royce generates £11.8b from Civil Aerospace, £5.5b from Power Systems and £5.0b from Defence, with only part linked to nuclear propulsion.
Market Cap: £104.1b
For nuclear focused investors, Rolls-Royce matters because its submarine reactor work and growing small modular reactor ambitions put hard engineering behind the low carbon power story.
“Rolls-Royce SMR has secured multi-country selections and is already in execution for units in the UK, Sweden and the Czech Republic while aiming to commission up to 2 small modular reactors per year in the mid 2030s and up to 8 per year at maturity, creating a potential new source of high margin revenue and profit growth.”
What happens if that new reactor pipeline scales just as one unresolved pressure on future profitability moves in Rolls-Royce’s favour.
If that pressure eases at the right moment, the full narrative for Rolls-Royce Holdings sets out how Rolls-Royce Holdings could see that SMR effort reshape risk, returns and capital needs.
LSE:RR. 1-Year Stock Price Chart
Overview: National Atomic Company Kazatomprom JSC is a Kazakhstan based uranium producer supplying natural uranium fuel and related products to global nuclear utilities.
Operations: The Uranium segment generates about KZT 1,697,002 million of revenue, with Ulba Metallurgical Plant and other activities contributing smaller amounts across diversified products and services.
Market Cap: US$16.1b
Kazatomprom provides direct exposure to the fuel used in existing and planned reactors, so its role in uranium supply is central to this nuclear focused list.
“Global recognition of nuclear as a core part of long term energy policy, including plans to build new reactors and extend existing plants across the U.S., Europe, Asia and Japan, is one factor influencing uranium demand and the market context for Kazatomprom’s revenue profile and contract pricing.”
Investors may also consider how Kazatomprom’s long term appeal could be affected if a persistent cost pressure either intensifies or begins to ease.
As that cost question keeps bubbling in the background, the full narrative for National Atomic Company Kazatomprom JSC explains how Kazatomprom’s contracts, pricing power and risks could be quietly decoupling from the headline uranium story.
LSE:KAP Earnings & Revenue History as at Oct 2026
Overview: Centrica is an integrated energy group that supplies power and services, including electricity generated from nuclear assets, to households and businesses.
Operations: Centrica generates about £16.3b from Retail, £6.0b from Optimisation and £1.6b from Infrastructure, offset by inter segment and IFRS 9 related revenue adjustments.
Market Cap: £7.1b
For a nuclear focused investor, Centrica matters because it links nuclear generated electricity directly to homes and businesses through its generation, trading and supply arms.
“Expanding investment in regulated and contracted infrastructure such as Sizewell C, Grain LNG and the Meter Asset Provider, which together contributed about £80m of EBITDA in H1 2026 and are expected to reach roughly £175m in 2026, points to a growing base of long-duration earnings that can raise the share of predictable EBITDA and support more stable net margins.”
The real swing factor is whether one stubborn pressure inside the retail energy book loosens enough to let those steadier margins shine through.
If that pressure finally breaks in Centrica’s favour, the full narrative for Centrica shows how steadier infrastructure earnings could be masking a very different future earnings mix.
LSE:CNA Earnings & Revenue History as at Oct 2026 Seeking Alternatives Before Momentum Flies
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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.
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