Data as of .
ICLN vs SMOG: which is really different?
ICLN and SMOG hold 16% of their weight in the same names, and ICLN returned more over the year.
ETFIQ Off-Index Score: ICLN scores higher
How much of it is not the index it is sold as an alternative to?
A percentile among the 379 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
16% of the two portfolios are the same securities at the same weight.
What they hold in common
By the books each fund has filed, ICLN and SMOG hold 16% of their money in the same securities at the same weight.
| Holding | ICLN | SMOG |
|---|---|---|
| BLOOM ENERGY CLASS A | 9.06% | 6.10% |
| FIRST SOLAR | 7.58% | 2.94% |
| ORSTED A/S | 1.55% | 1.96% |
| NEXTPOWER INC | 6.36% | 1.51% |
| ENPHASE ENERGY | 4.29% | 0.66% |
| BROOKFIELD RENEWABLE SUBORDINATE V | 0.47% | 0.74% |
| VERBUND AG | 0.61% | 0.46% |
| ENEL AMERICAS SA | 0.33% | 0.36% |
| CONTACT ENERGY LTD | 0.30% | 0.88% |
| MERIDIAN ENERGY LTD | 0.22% | 0.86% |
| Only in ICLN | Only in SMOG |
|---|---|
| CHINA YANGTZE POWER LTD A 7.78% | Iberdrola Sa 8.25% |
| VESTAS WIND SYSTEMS 4.33% | Tesla Inc 8.17% |
| EQUATORIAL SA 3.36% | Nextera Energy Inc 7.03% |
| EDP ENERGIAS DE PORTUGAL 2.93% | Enel Spa 6.57% |
| PLUG POWER 2.74% | Byd Co Ltd 5.64% |
| CHUBU ELECTRIC POWER INC 2.72% | Vestas Wind Systems A/S 4.89% |
| SOLAREDGE TECHNOLOGIES 1.99% | Samsung Sdi Co Ltd 4.22% |
| ENLIGHT RENEWABLE ENERGY 1.98% | Axia Energia Sa 3.48% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Sep 18, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| ICLN | SMOG | ICLN | SMOG | ICLN | SMOG | |
| 3 months | −16.8% | −7.7% | −19.0 pts | −9.9 pts | −14.3 pts | −5.2 pts |
| 6 months | −2.5% | +3.1% | −20.5 pts | −14.9 pts | −26.8 pts | −21.1 pts |
| 1 year | +18.0% | +11.5% | +1.4 pts | −5.0 pts | −3.8 pts | −10.2 pts |
| 3 years | +18.6% | +29.0% | −59.8 pts | −49.4 pts | −79.5 pts | −69.2 pts |
| Since launch | +9.3% | +112.2% | −794.3 pts | −691.3 pts | −1681.0 pts | −1578.0 pts |
| ICLN iShares Global Clean Energy ETF Holds 138 stocks in clean energy, 8% of its weight in S&P 500 companies | SMOG VanEck Low Carbon Energy ETF Holds 55 stocks in clean energy, 18% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | iShares | VanEck |
| Theme | Clean energy | Clean energy |
| In the S&P 500 | 7.7% | 18.2% |
| Active share vs the S&P 500 | 100.0% | 97.8% |
| In the Nasdaq-100 | 0.0% | 8.1% |
| Holdings | 138 | 55 |
| Top ten, share of the fund | 51.9% | 60.1% |
| Expense ratio | 0.38% | 0.64% |
| Fee for the differing part | 0.38% | 0.65% |
| Total return, 1 year | +18.0% | +11.5% |
| vs the S&P 500 | +1.4 pts | −5.0 pts |
| vs the Nasdaq-100 | −3.8 pts | −10.2 pts |
| Below its high | −43.5% | −23.9% |
| Net assets | $2.1bn | $131m |
ICLN in plain words
By weight, 8% of ICLN'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 52% of the fund across 138 positions, as published by its issuer for Sep 18, 2026. Over the year to Sep 18, 2026 the fund returned +18.0% with distributions reinvested against +16.6% for the S&P 500, so a holder was ahead by 1.4 pts. It sits 43.5% below its all-time high of Jan 7, 2021.
SMOG in plain words
By weight, 18% of SMOG's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 98%. The top ten holdings are 60% of the fund across 55 positions, as published by its issuer for Sep 18, 2026. Over the year to Sep 18, 2026 the fund returned +11.5% with distributions reinvested against +16.6% for the S&P 500, so a holder was behind by 5.0 pts. It sits 23.9% below its all-time high of Jan 22, 2021.
Questions people ask
- Do ICLN and SMOG hold the same stocks?
- By their latest filings, 16% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.
- Which is more different from the S&P 500, ICLN or SMOG?
- ICLN has 8% of its weight in S&P 500 names and SMOG has 18%, so ICLN differs more from the index.
- Which is cheaper, ICLN or SMOG?
- ICLN charges 0.38% a year and SMOG charges 0.64%, so ICLN is cheaper. Fees come from each fund's prospectus.
Other comparisons
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.
Cite this page. ETFIQ, ICLN against SMOG, data as of Sep 18, 2026. https://etfiq.com/compare/themes/icln-vs-smog Free to use with attribution; the underlying files are at Open data.