Investor interest in nuclear energy has surged in recent years – in 2025, uranium ETFs ranked 4th in terms of thematic ETF net flows, bringing in $1.1 billion.[1] With the increasing threats to global energy security, nuclear power has moved away from being viewed as a niche decarbonisation solution to a strategic asset. Reactor fuel requirements already outpace annual uranium mine production, with the global market on track for its 14th consecutive year of below replacement contracting.[2]
As with defence, nuclear power has become a strategically sensitive, and geopolitically concentrated sector – and the ETFs built to capture it differ materially in what they own and how they may perform in a drawdown. As such, investors should look past the underlying theme and into the fund’s construction.
Funds that are labelled as ‘uranium’ or ‘nuclear’ span a wide spectrum: pure-play uranium miners and developers, physical uranium holding vehicles, and broader nuclear value-chain funds that include enrichment, utilities, reactor builders, and equipment and service providers.[3]
Even within a single fund, not every holding is equally ‘nuclear’ – for some companies it may represent only part of their revenue, with a diversified utility company generating the bulk of earnings from regulated non-nuclear generation, potentially diluting a fund’s actual sensitivity to the cycle, for better or worse.
The Sprott Uranium Miners UCITS ETF (ticker: URNM) and Sprott Junior Uranium Miners UCITS ETF (ticker: URNJ) have uranium-price exposure at the mining and junior mining level – the latter is Europe’s only pure-play junior uranium miners ETF,[4] selected specifically for their growth potential.[5] Nuclear Renaissance UCITS ETF (ticker: NUKZ), launched with Infrastructure Capital Advisors, takes a deliberately broader approach, capturing the full nuclear ecosystem – enrichment and fuel processing, reactor construction, next-generation such as SMRs, and utilities – rather than relying predominantly on uranium extractors.[6] [7]
Investors should establish which part of the value chain a fund is giving them access to, and what share of constituent revenue is genuinely uranium-or-nuclear-linked, before assuming ‘nuclear exposure’ means a single kind of exposure.
Source: Bloomberg, Sprott Asset Management. Data as 31.07.2026. Y-axis displays the cumulative return. Past performance is not indicative of future performance. For illustrative purposes only. Uranium Miners are measured by the VettaFi Global Uranium Mining Index (URNMX index); Junior Uranium Miners are measured by the Nasdaq Sprott Junior Uranium Miners™ Index (NSURNJT™ Index); U.S. Equities are measured by the S&P 500 TR Index; the U3O8 uranium spot price is measured by a proprietary composite of U3O8 spot prices from UxC, S&P Platts, Numerco and TradeTech LLC.; and Commodities are measured by the Bloomberg Commodity Index (BCOM). You cannot invest directly in an index.
Many indices include companies with some involvement in uranium, but that involvement can be immaterial to how the business actually performs.
BHP is an example; it is one of the world’s larger uranium producers and simultaneously due to the nature of its reporting of uranium it is insulated from the price of uranium. Olympic Dam yields between 3,000 and 4,000 tonnes of U308 a year.[8] However, BHP does not report uranium as a separate business segment: the output is a by-product of a copper operation, folded into Copper South Australia alongside Prominent Hill and Carrapateena,[9] and BHP’s own unit cost calculations treat uranium the same as gold – as a by-product credit, priced at an assumed $80 per pound.[10]
This distinction is central to how investors are exposed to the uranium sector. A company that accounts for uranium as some kind of cost offset for other business operations – in the case of BHP its copper – may see its share price driven to a greater extent by those other operations and not uranium.
This is why index construction is important. URNM, for example, requires constituents to designate at least 50% of their assets to the uranium mining industry – mining, exploration, development and production, or holding physical uranium and uranium royalties.[11] This same discipline is applied to URNJ at the development end, capping constituents at a $3 billion market capitalisation.[12]
Before assuming that a fund gives uranium exposure, investors should ask what share of each constituent’s business is truly uranium based.
When investing in uranium and its associated sectors, it is important to understand what kind of exposure you are buying. For instance, a UCITS fund cannot hold a physical commodity – thus shaping how every uranium product in Europe is constructed.[13] Therefore, a fund wanting exposure to the metal must acquire it through listed companies and trusts that hold it on an investor’s behalf.
By way of example, as of August 2026, URNM held approximately one sixth of its portfolio in physical holders – Sprott Physical Uranium at 12.43% and Yellow Cake at 4.14% – while URNJ held none and had 98.25% in mining equities. Physical exposure does exist in Europe, but only outside the UCITS wrapper. The Sprott Physical Uranium ETC is domiciled in Jersey and inherits the premium or discount of the trust it holds.[14]
The two structures transmit uranium price movements differently. Equity holdings are exposed to mining companies, whose share prices reflect production costs, financing and project risk alongside the uranium price. The physical ETC is exposed to the market price of a trust that holds uranium, which can trade at a premium or discount to the value of those holdings.
When it comes to uranium or nuclear ETFs, there can be a number of significant differences in how the fund’s index is constructed, and consequently, the kind of exposure investors gain access to. Investors looking at these sectors should make sure they understand the different approaches and determine which is best suited for them.
Key risks
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Past performance is not a reliable indicator of future performance. The price of the Products may vary and they do not offer a fixed income. This document may contain forward looking statements including statements regarding our belief or current expectations with regards to the performance of certain assets classes. Forward looking statements are subject to certain risks, uncertainties and assumptions. There can be no assurance that such statements will be accurate and actual results could differ materially from those anticipated in such statements. Therefore, readers are cautioned not to place undue reliance on these forward-looking statements. The content of this document is for information purposes and for your internal use only, and does not constitute an investment advice, recommendation, investment research or an offer for sale nor a solicitation of an offer to buy any Product or make any investment.
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[1] Ibid
[2] https://sprott.com/insights/uranium-fundamentals-strengthen-beneath-the-market-noise/
[3] https://greenstocksresearch.com/nuclear-and-uranium-etfs/
[4] Correct as of 08.09.2026
[5] https://hanetf.com/fund/urnj-junior-uranium-miners-etf/
[6] https://www.etfstream.com/articles/nuclear-lifecycle-etf-launched-by-hanetf-and-infrastructure-capital
[7] https://etfexpress.com/2026/04/02/hanetf-and-infrastructure-capital-advisors-launch-nuclear-renaissance-etf-in-europe-nukz/
[8] https://www.energyintel.com/00000195-051b-d868-abd5-6f7fabc20000
[9] https://www.bhp.com/-/media/documents/media/reports-and-presentations/2025/250819_bhpresultsfortheyearended30june2025.pdf
[10] https://www.bhp.com/-/media/documents/media/reports-and-presentations/2025/250718_bhpoperationalreviewfortheyearended30june2025.pdf
[11] https://sprottetfs.com/urnm-sprott-uranium-miners-etf/
[12] https://hanetf.com/fund/urnj-junior-uranium-miners-etf/
[13] Source: Financial Conduct Authority Handbook, COLL 5.2
[14] Source: HANetf. Data as of 27.08.2026.
The labels are not interchangeable, and neither is standardised. A uranium fund typically gives exposure to the fuel: producers, developers and explorers, and in some cases vehicles that hold the physical commodity on investors’ behalf. A nuclear fund is usually broader, spanning enrichment and fuel processing, reactor construction, next-generation technologies such as SMRs, equipment and service providers, and the utilities that operate the plants.
The practical consequence is that two funds sharing a theme can own almost entirely different businesses and behave differently through a cycle. The Sprott Uranium Miners UCITS ETF (URNM) and Sprott Junior Uranium Miners UCITS ETF (URNJ) sit at the mining and junior mining end. The Nuclear Renaissance UCITS ETF (NUKZ) is deliberately constructed across the wider nuclear ecosystem rather than relying predominantly on uranium extractors. Both are legitimate approaches to the theme; they are not substitutes for one another.
Both, depending on what the investor wants. Utilities, engineering firms and equipment suppliers are not primarily priced off the spot or term uranium price — their earnings are driven by regulated returns, order books, contract backlogs and construction cycles. Adding them typically lowers a portfolio’s beta to the fuel price and can reduce volatility, while introducing exposure to build-out and policy execution instead.
Miners and developers are the more direct expression of the fuel market: reactor requirements already exceed annual mine production, and the market is on track for a fourteenth consecutive year of below-replacement contracting. If the thesis is the fuel deficit, a broad value-chain fund may under-deliver on it. If the thesis is nuclear capacity growth, a pure mining fund captures only one input to it. Investors should decide which claim they are underwriting before selecting the vehicle.
Look at how the company itself accounts for it. BHP is the clearest illustration: Olympic Dam yields roughly 3,000–4,000 tonnes of U3O8 a year, making BHP one of the world’s larger uranium producers, yet it does not report uranium as a separate business segment. Output is a by-product of a copper operation, consolidated into Copper South Australia alongside Prominent Hill and Carrapateena, and treated in unit cost calculations as a by-product credit — priced at an assumed $80 per pound, the same treatment given to gold.
A company that books uranium as a cost offset to another business will see its equity driven by that other business. Useful diligence questions: what share of revenue, earnings or assets is uranium-linked; is uranium a reported segment; and is the commodity a primary product or a credit against the cost of something else. The same applies to diversified utilities in broader nuclear funds, where regulated non-nuclear generation may produce the bulk of earnings.
Materiality thresholds and market-capitalisation bands are the two that most affect the exposure delivered.
URNM requires constituents to designate at least 50% of assets to the uranium mining industry — mining, exploration, development and production, or holding physical uranium and uranium royalties. That test is what keeps large diversified miners with by-product uranium out of the portfolio. URNJ applies the same discipline at the development end of the market and caps constituents at $3 billion market capitalisation, which is how it maintains a genuine junior profile rather than drifting into mid-cap producers.
In the absence of such rules, an index can hold companies with some involvement in uranium whose businesses are immaterially exposed to it. Reading the index methodology — not the fund name — is the only reliable way to establish what an allocation will actually track.
A UCITS fund is prohibited from holding a physical commodity directly (FCA Handbook, COLL 5.2). That single constraint shapes how every UICTS uranium product in Europe is built: a UCITS fund seeking exposure to the metal must obtain it indirectly through listed equities and through listed trusts and companies that hold the commodity on investors’ behalf.
This is why the composition question matters more in uranium than in most themes. Two products can both claim exposure to the uranium price while one holds it via equities whose share prices are influenced by operational, financing and jurisdictional factors, and the other holds instruments backed by pounds in storage. Physical exposure does exist in Europe, but only outside the UCITS wrapper.
Producers generate revenue, have contracted volumes and can pass a rising price through to cash flow. Juniors are, for the most part, pre-revenue: their value is a function of resource, permitting progress, capital markets access and the discount rate applied to a future production decision. That makes them a higher-beta expression of the same thesis — greater upside sensitivity to a rising price, and greater sensitivity to funding conditions, equity issuance and sentiment on the way down.
URNJ is Europe’s only pure-play junior uranium miners ETF, and its constituents are selected specifically for growth potential. Investors should treat it as a distinct risk exposure rather than a cheaper version of the producers, size it accordingly, and expect wider dispersion between holdings. Past performance is not a guide to future returns.
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