Jasmine Birtles
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5 Best Nuclear Stocks and ETFs for UK Investors in 2026
Ruby Layram
7th Oct 2026
On Tuesday, shares in US power giant Constellation Energy shot up around 12% after it announced a 20-year deal to supply Google with 890 megawatts of nuclear power. The same day, the S&P 500 closed at a fresh record of 7,818.93, and suddenly everyone is asking the same question: is nuclear the next big investing theme?
If you are a UK beginner, it is easy to feel late to the party. This guide breaks down five ways to get nuclear exposure via two ETFs (baskets of investments you buy in one go) and three individual companies. We will tell you what each one is, why it is in the news, and the main risk to keep in mind.
Why are nuclear stocks in the news right now?
Big tech firms need enormous amounts of reliable electricity to run AI data centres. Nuclear plants produce power around the clock, which makes them attractive to companies like Google. According to reports, Constellation will invest over $4.3 billion to deliver the new deal. When a deal like that lands, the whole sector tends to get a boost, and other power producers such as Vistra and Talen Energy also rose on Tuesday.
But a sharp one-day jump is not the same as a safe investment. Themes that get hot quickly can also cool quickly, so it pays to understand what you are buying.
1. VanEck Uranium and Nuclear Technologies UCITS ETF (NUCL)
What it is: An Ireland-domiciled ETF that tracks the MarketVector Global Uranium and Nuclear Energy Infrastructure Index. It holds companies earning significant revenue from uranium mining, uranium projects or nuclear energy infrastructure. UCITS is a regulatory label that many UK investors look for because it indicates a standard set of investor protections for funds sold in Europe and the UK.
Why it matters now: It is one of the more established nuclear ETFs, with about $2.2 billion of assets according to VanEck. Spreading your money across lots of companies means you are not betting on a single deal.
Key risk: The ongoing charge is 0.55% a year, which is pricier than a typical broad index fund. The fund is also concentrated in one sector, and VanEck itself flags sector concentration and commodity price swings as risks. Its year-to-date return was around -5% on 6 October, a reminder that this theme has been bumpy.
2. Global X Uranium UCITS ETF (URNU)
What it is: A UCITS ETF tracking the Solactive Global Uranium & Nuclear Components index, with 61 holdings and roughly $669 million of assets according to Global X.
Why it matters now: It leans towards the uranium miners that supply the fuel. Its top holding is Cameco at about 15%, followed by NexGen Energy, Oklo, Uranium Energy Corp and Kazatomprom.
Key risk: A total expense ratio (the yearly cost) of 0.65%, and a fairly top-heavy portfolio. If uranium prices wobble, miners can fall hard.
3. Constellation Energy (CEG)
What it is: A major US nuclear power producer and the company at the centre of this week’s headlines.
Why it matters now: Its 20-year Google agreement gives it a long-term customer for 890 megawatts of capacity, which investors like because it is predictable income.
Key risk: After a double-digit one-day jump, a lot of good news may already be in the price. It is also a US-listed share, so you will usually pay currency conversion costs on UK platforms, and a single company can be far more volatile than a fund.
4. Cameco
What it is: One of the world’s best-known uranium miners, listed in Canada and the largest holding in the Global X fund above.
Why it matters now: If nuclear power demand grows, the companies that dig up the fuel could benefit. Buying Cameco directly is a more targeted way to back that idea than an ETF.
Key risk: Mining companies depend on commodity prices, which can swing sharply. Not every UK platform offers Canadian-listed shares, so check availability first.
5. Oklo (OKLO)
What it is: A US-listed company developing next-generation nuclear reactors, and a top-three holding in the Global X ETF.
Why it matters now: It is the “future technology” end of the theme, the kind of company people buy hoping for big long-term growth.
Key risk: Early-stage companies can be very volatile, and their future earnings are uncertain. This is the one to size very small, if at all.
Nuclear stocks vs nuclear ETFs: which suits a beginner?
If you are new to investing, an ETF is usually the calmer route because one disappointing company will not sink the whole thing. Individual shares can pay off more, but they can also fall more. Neither is “safer” in absolute terms: even a diversified nuclear ETF is still a bet on one theme.
What to do next: 5 steps
- Check the basics first. Do you have an emergency fund, and are you already investing in a broad, low-cost index fund? Theme investing is usually the “extra”, not the foundation.
- Decide a small slice. Many beginners keep themed bets to a small percentage of their portfolio. Only you can decide what suits your goals and stomach.
- Check your platform. Look up each fund by its ticker or ISIN and confirm it is available, plus any dealing and currency fees, before you buy.
- Consider an ISA. Holdings in a Stocks & Shares ISA are free of UK tax on gains and dividends, if the platform allows the investment.
- Drip in rather than dive in. Investing a set amount each month spreads out the risk of buying at a temporary peak. Start small, be patient.
The Google–Constellation deal shows why nuclear is getting attention, but a hot headline is not a reason to pile in. Treat this as a theme to understand, not a tip to chase.
This article is for informational and educational purposes only and is not regulated financial advice. Investing involves risk, and you could lose some or all of your money. Past performance is not a guide to future returns. Do your own research or speak to a regulated financial adviser before investing. Figures are as reported on 6–7 October 2026 and may have changed.
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