Themes · general research

Nuclear power and small reactors

Nuclear utilities, uranium miners and enrichers, small modular reactor developers.

Can lose most

Can lose most of the money. Typical volatility 79 %, typical worst fall −64 %; 5 of 9 companies are more than half below their high. The companies move together (correlation 0,79): owning several of them is one bet.

Small-reactor developers are pre-revenue (Oklo $1.2 M of revenue on a $5.4 B valuation) and fell 76–87 % in the last 12 months after runs of 8–21×. Utilities and suppliers (Constellation, BWXT, Cameco) carry about half the drawdown.

Typical volatilityMedian 1-year volatility of the theme's companies (annualised daily moves).
79 %
Typical worst fallMedian of each company's worst peak-to-trough fall in five years (or since listing).
−64 %
Typical distance from the high
−62 %
Typical 1-year return
−50 %

How to hold it in the EU

US-listed ETFs have no KID and cannot be bought by EU retail investors; these UCITS lines can. One fund line spreads the single-company risk.

VanEck Uranium & Nuclear Technologies UCITS ETF A
ISIN IE000M7V94E1TER 0,55 %Assets 1 775 M € Volatility 1y 36 %Worst fall 1y −32 %Since 2023-02-03
LineWhere
NUKL Xetra · EURFreedom24IBKR
NUCL London Stock Exchange · USDFreedom24?IBKR
NUCL Borsa Italiana · EURIBKR
NUCL Euronext Paris · EURIBKR
Global X Uranium UCITS ETF Acc
ISIN IE000NDWFGA5TER 0,65 %Assets 530 M € Volatility 1y 44 %Worst fall 1y −39 %Since 2022-04-20
LineWhere
URNU Xetra · EURFreedom24IBKR
URNU London Stock Exchange · USDFreedom24?IBKR
HANetf Sprott Uranium Miners UCITS ETF Acc
ISIN IE0005YK6564TER 0,85 %Assets 310 M € Volatility 1y 40 %Worst fall 1y −40 %Since 2022-05-03
LineWhere
U3O8 Xetra · EURFreedom24IBKR
URNM London Stock Exchange · USDFreedom24?IBKR

Green: available; dashed with “?”: the venue is offered, check the line in the terminal; crossed out: not available.

US theme ETFs (URA, NLR) are used only to measure the theme's risk: not buyable by EU retail.

The companies

Research data of 2026-10-15; where we score the company, its live Smart Score and red flags are shown.

Volatility: 1 year; worst fall and best/worst: 5 years or since listing; “12 m” = the share of rolling 12-month windows that at least doubled / at least halved.
TickerMarket capRevenue (y/y)P/SVolatility 1yWorst fallFrom high1 year12 m: ×2 / −50 %WhereOur rating
CEG
Constellation: nuclear power fleet
99,0 B$31,3 B$ (+26 %)3×49 %−51 %−31 %−27 %20 % / 0 %Freedom24IBKR1/10Caution. Negative free cash flow in at least two of the last three years. More in the glossary →Caution. Accruals or the Beneish M-score are in the watch zone. More in the glossary →+2
CCJ
Cameco: uranium miner with a Westinghouse stake
35,4 B$2,5 B$ (−3 %)14×55 %−40 %−39 %−12 %12 % / 0 %Freedom24IBKR2/10
BWXT
naval reactors and nuclear components
12,3 B$3,5 B$ (+23 %)4×45 %−44 %−44 %−32 %3 % / 0 %Freedom24IBKR1/10Caution. Dividend Safety below 40 points. More in the glossary →
LEU
Centrus: uranium enrichment (HALEU)
2,5 B$474 M$ (+8 %)5×89 %−78 %−72 %−70 %27 % / 2 %Freedom24IBKR1/10Caution. Share count growing 3–10 % a year over three years. More in the glossary →Caution. Accruals or the Beneish M-score are in the watch zone. More in the glossary →+1
UEC
uranium miner (in-situ recovery)
3,8 B$37 M$ (−44 %)103×79 %−64 %−62 %−50 %23 % / 1 %Freedom24IBKRCaution. Negative free cash flow in at least two of the last three years. More in the glossary →Caution. Share count growing 3–10 % a year over three years. More in the glossary →+1
NXE
NexGen: uranium developer (Canada)
5,4 B$—n/m56 %−54 %−42 %−10 %11 % / 0 %Freedom24IBKR1/10Caution. Negative free cash flow in at least two of the last three years. More in the glossary →Caution. Share count growing 3–10 % a year over three years. More in the glossary →
OKLO
Oklo: small modular reactors, pre-revenue
5,4 B$1 M$n/m94 %−83 %−83 %−83 %32 % / 2 %Freedom24IBKR1/10Serious warning. Share count growing more than 10 % a year over three years. More in the glossary →Caution. Negative free cash flow in at least two of the last three years. More in the glossary →+1
SMR
NuScale: small modular reactor design
2,5 B$11 M$ (−81 %)235×99 %−89 %−89 %−87 %28 % / 25 %Freedom24IBKRSerious warning. Share count growing more than 10 % a year over three years. More in the glossary →Caution. Negative free cash flow in at least two of the last three years. More in the glossary →+1
NNE
Nano Nuclear: micro-reactors, pre-revenue
699 M$< 1 M$n/m90 %−78 %−77 %−76 %29 % / 11 %Freedom24IBKRCaution. Negative free cash flow in at least two of the last three years. More in the glossary →Caution. Share count growing more than 10 % a year over three years. More in the glossary →

Survivorship: the list is of companies known in 2026; earlier names that went bankrupt or were taken private are missing, so the “×2” share is an upper bound.

The theme as a basket

Equal weights, monthly rebalance, 08.08.2022–14.10.2026, compared with the S&P 500.

Equal-weight basketCAGRVolatility 1yWorst fall1 year
OKLO SMR LEU UEC NXE CCJ BWXT+36 %52 %−59 %−56 %
S&P 500 (SPY)+15 %16 %−19 %+13 %

The window starts near the 2022 low, which flatters every basket. Past results do not predict future ones.

Base rates: how such bets usually end

Research results to keep in mind before any upside.

IPOs, 3 years38,5 % of IPOs lost more than half in 3 years; 16,1 % doubled, 0,5 % grew 11× or more.

Jay Ritter, IPO statistics, Table 16e (9,195 IPOs 1975–2021), 23.03.2026

SPAC mergers−51 % average 1-year return after a SPAC merger (2012–2024).

Ritter / Gahng–Ritter–Zhang, Table 15c (625 de-SPACs 2012–2024), 05.10.2026

Thematic ETFs−30 % risk-adjusted over the first 5 years of specialised (thematic) ETFs.

Ben-David, Franzoni, Kim & Moussawi, RFS 36(3), 2023

Lottery stocks> 1 % a month: how much “lottery” stocks (the biggest one-day jumps) underperform.

Bali, Cakici & Whitelaw, JFE 99(2), 2011

Where the gains come from4 % of US stocks created all the net wealth since 1926.

Bessembinder, JFE 129(3), 2018

Volatility drag≈ 46 % a year is lost to volatility at 96 % volatility: +40 % a year on average compounds to about −6 %.

standard approximation: geometric mean ≈ arithmetic mean − σ²/2 (our arithmetic)

Source: Nasdaq historical closes 15.10.2021–14.10.2026; stockanalysis.com fundamentals 15.10.2026; justETF profiles and quotes 15.10.2026 · Research data of 2026-10-15 · Methodology and sources