TNUK · Tortoise Nuclear Renaissance ETF
TNUK holds 25 stocks. 99% of it is not in the S&P 500, and its top ten are 62% of the fund.
Its ten largest positions
| Holding | Ticker | Weight | |
|---|---|---|---|
| Curtiss-Wright Corp | CW | 8.15% | |
| Cameco Corp | CCJ | 7.48% | |
| Doosan Enerbility Co Ltd | 034020 | 6.94% | |
| Talen Energy Corp | TLN | 6.90% | |
| BWX Technologies Inc | BWXT | 6.66% | |
| Mirion Technologies Inc | MIR | 6.22% | |
| Rolls-Royce Holdings PLC | RYCEY | 5.06% | |
| Uranium Energy Corp | UEC | 4.97% | |
| Public Service Enterprise Grou | PEG | 4.75% | |
| Vistra Corp | VST | 4.70% |
Period by period
| Window | Total return | S&P 500 | Gap to S&P 500 | Gap to Nasdaq-100 |
|---|---|---|---|---|
| 3 months | −1.3% | +4.7% | −6.0 pts | −3.4 pts |
| 6 months | −7.8% | +15.2% | −23.0 pts | −28.0 pts |
| Since launch | −2.8% | +14.8% | −17.6 pts | −21.2 pts |
In plain words
The top ten holdings are 62% of the fund across 25 positions, as filed for May 31, 2026. Over the year to Sep 4, 2026 the fund returned −2.8% with distributions reinvested against +14.8% for the S&P 500, so a holder was behind by 17.6 pts. It sits 18.8% below its all-time high of Jan 28, 2026.
| Theme (ETFIQ, editorial) | Nuclear and uranium |
|---|---|
| Launched | Dec 18, 2025 |
| Already in the S&P 500, by weight (ETFIQ) | 17.5% |
| Active share vs the S&P 500 (ETFIQ) | 99.2% |
| Already in the Nasdaq-100, by weight (ETFIQ) | 4.5% |
| Active share vs the Nasdaq-100 (ETFIQ) | 99.5% |
| Top ten holdings weight | 61.8% |
| Holdings | 25 |
| Holdings as of (SEC N-PORT) | May 31, 2026 |
| Top holdings | Curtiss-Wright Corp 8.2%, Cameco Corp 7.5%, Doosan Enerbility Co Ltd 6.9%, Talen Energy Corp 6.9%, BWX Technologies Inc 6.7%, Mirion Technologies Inc 6.2%, Rolls-Royce Holdings PLC 5.1%, Uranium Energy Corp 5.0%, Public Service Enterprise Grou 4.8%, Vistra Corp 4.7% |
| Net assets (SEC filing, whole fund, as filed for May 31, 2026) | $2m |
| Below its all-time high (ETFIQ) | −18.8% |
| Closest funds by holdings overlap | NLR 46%, RCTR 44%, NUKZ 39%, URAN 34%, URA 27% |
Holdings from the fund’s latest public SEC N-PORT filing; overlap and active share computed by ETFIQ against the IVV and QQQM books; returns from Tiingo end-of-day prices with distributions reinvested. How this desk computes every figure
Questions people ask
- How much of TNUK is already in the S&P 500?
- By its holdings filed for May 31, 2026, 18% of TNUK by weight is stocks the S&P 500 already holds. Its active share against the index is 99%, so that share is the part doing something different.
- What does TNUK hold?
- 25 positions as filed for May 31, 2026, with the top ten at 62% of the fund. The largest are Curtiss-Wright Corp at 8.2%, Cameco Corp at 7.5%, Doosan Enerbility Co Ltd at 6.9%.
- Has TNUK beaten the S&P 500?
- Over the year to Sep 4, 2026 TNUK returned −2.8% with distributions reinvested, against +14.8% for the S&P 500, so it finished behind the index by 17.6 points.
The words on this page
- Active share
- The part of the fund doing something the index is not, as a percentage. It is the part a fee is actually buying.
- Weight overlap
- The share of money two portfolios hold in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice.
- Already in the index
- The fund’s weight in securities the S&P 500 holds at all. A fund can be made entirely of index names and still have high active share, because it holds them at very different weights.
- Top ten
- What the ten largest positions add up to. The higher it is, the more the fund is a bet on a few companies rather than a theme.
Every term this desk uses, defined in full on the themes desk vocabulary page.
Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Funds near this one
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Cite this page. ETFIQ, TNUK on the themes desk, data as of Sep 4, 2026. https://etfiq.com/funds/TNUK.html Free to use with attribution; the underlying files are at Open data.