Do TNUK and URAN hold the same stocks?

By their latest filings, 34% of their books are the same securities at the same weight, which is a meaningful overlap. Overlap is the sum of the smaller weight of every security they share.

Which is more different from the S&P 500, TNUK or URAN?

TNUK has 18% of its weight in S&P 500 names and URAN has 25%, so URAN differs more from the index.

Which is cheaper, TNUK or URAN?

TNUK charges 0.85% a year and URAN charges 0.35%, so URAN is cheaper. Fees come from each fund's prospectus.

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TNUK vs URAN: which is really different?

TNUK and URAN hold 34% of their weight in the same names. Tortoise Nuclear Renaissance ETF and Themes Uranium & Nuclear ETF.

17.5%

TNUK in the S&P 500

24.7%

URAN in the S&P 500

−11.8%

TNUK total return, since launch

−22.3%

URAN total return, 1 year

TNUK · 6 months to Sep 30, 202683% of its weight is outside the S&P 500

18% of TNUK's weight is in S&P 500 companies and 83% is outside the index

URAN · 1 year to Sep 30, 202675% of its weight is outside the S&P 500

25% of URAN's weight is in S&P 500 companies and 75% is outside the index

ETFIQ Off-Index Score · URAN scores higherHow much of it is not the index it is sold as an alternative to?

TNUK 66.3

URAN 69.7

0.1, the lowest in this set92.0, the highest

A percentile among the 375 thematic ETFs with a holdings filing. It is a position in a set, not a rating, and neither end of it is a recommendation. All thematic ETFs ranked by it → How it is computed →

What they hold in common

By the books each fund has filed, TNUK and URAN hold 34% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026 and May 31, 2026.

50%

half

34% in common

Positions both hold, largest shared weight first

Holding TNUK URAN

Constellation Energy Corp 4.51% 9.88%

Public Service Enterprise Grou 4.75% 3.81%

Cameco Corp 7.48% 3.19%

Uranium Energy Corp 4.97% 2.95%

Mirion Technologies Inc 6.22% 2.29%

Centrus Energy Corp 4.23% 2.20%

BWX Technologies Inc 6.66% 1.99%

Talen Energy Corp 6.90% 1.93%

Oklo Inc 1.77% 3.45%

NuScale Power Corp 1.73% 3.07%

NexGen Energy Ltd 1.29% 3.23%

Denison Mines Corp 1.09% 3.17%

Only in TNUK

Curtiss-Wright Corp 8.15%

Doosan Enerbility Co Ltd 6.94%

Rolls-Royce Holdings PLC 5.06%

Vistra Corp 4.70%

Fortum Oyj 4.50%

Amentum Holdings Inc 4.16%

AtkinsRealis Group Inc 4.11%

Jacobs Solutions Inc 2.11%

Only in URAN

American Electric Power Co Inc 4.20%

Duke Energy Corp 4.04%

CNNP 3.20%

Yellow Cake PLC 2.88%

CGN Power Co Ltd 2.78%

PG&E Corp 2.77%

IsoEnergy Ltd 2.77%

Lightbridge Corp 2.74%

Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed.

34% of the two portfolios are the same securities at the same weight.

Performance, window by window

	Total return		vs the S&P 500		vs the Nasdaq-100
Window	TNUK	URAN	TNUK	URAN	TNUK	URAN
3 months	−10.1%	−8.6%	−12.6 pts	−11.1 pts	−12.2 pts	−10.7 pts
6 months	−15.3%	−21.3%	−32.3 pts	−38.3 pts	−42.2 pts	−48.2 pts
1 year	not published	−22.3%	not published	−38.0 pts	not published	−46.0 pts
Since launch TNUK Dec 2025 · URAN Sep 2024	−11.8%	+30.1%	−25.7 pts	−6.4 pts	−33.8 pts	−23.8 pts

TNUK and URAN over each window. Every figure is an ETFIQ calculation with distributions reinvested. Source: ETFIQ. Open the live comparison on ETFIQ →

On the same fields

TNUK

Tortoise Nuclear Renaissance ETF · Holds 25 stocks in nuclear and uranium, 18% of its weight in S&P 500 companies

URAN

Themes Uranium & Nuclear ETF · Holds 42 stocks in nuclear and uranium, 25% of its weight in S&P 500 companies

Issuer Tortoise Themes

Theme Nuclear and uranium Nuclear and uranium

In the S&P 500 17.5% 24.7%

Active share vs the S&P 500 99.2% 99.5%

In the Nasdaq-100 4.5% 14.1%

Holdings 25 42

Top ten, share of the fund 61.8% 41.2%

Expense ratio 0.85% 0.35%

Fee for the differing part 0.86% 0.35%

Total return, 1 year −11.8% (since launch on Dec 18, 2025) −22.3%

vs the S&P 500 −25.7 pts −38.0 pts

vs the Nasdaq-100 −33.8 pts −46.0 pts

Below its high −26.4% −36.3%

Net assets $2m $25m

TNUK and URAN on the same fields, as of Sep 30, 2026. Source: ETFIQ.

TNUK in plain words

By weight, 18% of TNUK's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 99%. The top ten holdings are 62% of the fund across 25 positions, as filed for May 31, 2026. Since it launched on Dec 18, 2025 the fund returned −11.8% with distributions reinvested against +13.9% for the S&P 500, so a holder was behind by 25.7 pts. It sits 26.4% below its all-time high of Jan 28, 2026.

URAN in plain words

By weight, 25% of URAN's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 100%. The top ten holdings are 41% of the fund across 42 positions, as filed for Jun 30, 2026. Over the year to Sep 30, 2026 the fund returned −22.3% with distributions reinvested against +15.7% for the S&P 500, so a holder was behind by 38.0 pts. It sits 36.3% below its all-time high of Jan 28, 2026.

Questions people ask

Do TNUK and URAN hold the same stocks?: By their latest filings, 34% of their books are the same securities at the same weight, which is a meaningful overlap. Overlap is the sum of the smaller weight of every security they share.
Which is more different from the S&P 500, TNUK or URAN?: TNUK has 18% of its weight in S&P 500 names and URAN has 25%, so URAN differs more from the index.
Which is cheaper, TNUK or URAN?: TNUK charges 0.85% a year and URAN charges 0.35%, so URAN is cheaper. Fees come from each fund's prospectus.

Other comparisons

TNUK vs URNM TNUK vs UX TNUK vs NUKZ TNUK vs RCTR URAN vs URNJ URAN vs NUKZ URAN vs URNM URAN vs UX

TNUK on its own →URAN on its own →How every figure is computed →Standards and sources →

Where these figures came from

TNUK filings on SEC EDGAR ↗Tortoise website ↗URAN filings on SEC EDGAR ↗URAN prospectus with the expense ratio (SEC) ↗Themes page for URAN ↗

ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement. A comparison is not a recommendation.

Cite this page

ETFIQ, TNUK against URAN, data as of Sep 30, 2026. https://etfiq.com/compare/themes/tnuk-vs-uran

Open data

Free to use with attribution. Every figure is calculated from a named public source; the method is at etfiq.com/methodology.