Data as of Sep 4, 2026. Both funds on the fields they both publish, from the same sources.
ICLN vs VOO
iShares Global Clean Energy ETF and Vanguard 500 Index Fund.
What they hold in common
By the books each fund has filed, ICLN and VOO hold 0% of their money in the same securities at the same weight.
| Holding | ICLN | VOO |
|---|---|---|
| FIRST SOLAR, INC. | 7.18% | 0.04% |
| Only in ICLN | Only in VOO |
|---|---|
| BLOOM ENERGY CORPORATION 13.79% | NVIDIA Corp 7.53% |
| NEXTPOWER INC. 7.31% | Apple Inc 6.61% |
| China Yangtze Power Co., Ltd. 5.92% | Microsoft Corp 4.31% |
| VESTAS WIND SYSTEMS A/S 3.38% | Amazon.com Inc 3.63% |
| PLUG POWER INC. 3.29% | Alphabet Inc 3.26% |
| ENPHASE ENERGY, INC. 3.26% | Broadcom Inc 2.78% |
| EQUATORIAL S.A. 2.90% | Alphabet Inc 2.60% |
| SUZLON ENERGY LIMITED 2.39% | Micron Technology Inc 2.02% |
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 as filed for Apr 30, 2026 and Jun 30, 2026.
| ICLN iShares Global Clean Energy ETF | VOO Vanguard 500 Index Fund | |
|---|---|---|
| Where it sits | Themes desk | Core fund |
| Issuer | iShares | Vanguard |
| What it is | Clean energy | S&P 500 |
| Total return, 1 year | +25.3% | +20.1% |
| S&P 500 over the same days | +20.0% | +20.0% |
| Gap to the S&P 500 | +5.3 pts | +0.1 pts |
| Expense ratio | 0.38% | 0.03% |
| Already in the S&P 500 | 7.2% | 100.0% |
| Holdings | 122 | 506 |
ICLN in plain words
By weight, 7% 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 122 positions, as filed for Apr 30, 2026. Over the year to Sep 4, 2026 the fund returned +25.3% with distributions reinvested against +20.0% for the S&P 500, so a holder was ahead by 5.3 pts. It sits 42.8% below its all-time high of Jan 7, 2021.
VOO in plain words
VOO is a index equity fund tracking S&P 500. Over the year to Sep 4, 2026 it returned +20.1% with distributions reinvested, against +20.0% for the S&P 500 and +25.6% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year. By its holdings filed for Jun 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 506 positions, with the top ten at 36.5%.
Questions people ask
- Which returned more over the last year, ICLN or VOO?
- In the year to Sep 4, 2026, with distributions reinvested, ICLN returned +25.3% and VOO returned +20.1%, so ICLN returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, ICLN or VOO?
- ICLN charges 0.38% a year and VOO charges 0.03%, so VOO is cheaper. Fees come from each fund's prospectus.
- How much do ICLN and VOO overlap with the S&P 500?
- By their latest filed holdings, 7% of ICLN and 100% of VOO by weight is stocks the S&P 500 already holds. Between the two funds, 0% of their books are the same securities at the same weight.
- Are ICLN and VOO the same kind of fund?
- No. ICLN is a thematic ETF and VOO is an index ETF, so they are built for different jobs. The table compares what both publish: return, cost and what each actually holds.
Other comparisons
Where to next
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 VOO, data as of Sep 4, 2026. https://etfiq.com/compare/any/ICLN-VOO.html Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources