Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IYE vs VO: how they differ
IYE and VO hold 7% of their weight in the same names, and IYE returned more over the year.
iShares U.S. Energy ETF and Vanguard Mid-Cap Index Fund.
What they hold in common
By the books each fund has filed, IYE and VO hold 7% of their money in the same securities at the same weight.
| Holding | IYE | VO |
|---|---|---|
| VALERO ENERGY CORPORATION | 3.54% | 0.75% |
| MARATHON PETROLEUM CORPORATION | 3.44% | 0.72% |
| SLB N.V. | 3.95% | 0.67% |
| PHILLIPS 66 | 3.32% | 0.66% |
| TARGA RESOURCES CORP. | 2.46% | 0.56% |
| BAKER HUGHES COMPANY | 3.13% | 0.53% |
| ONEOK, INC. | 2.59% | 0.53% |
| CHENIERE ENERGY, INC. | 2.62% | 0.49% |
| DEVON ENERGY CORPORATION | 1.39% | 0.46% |
| THE WILLIAMS COMPANIES, INC. | 4.38% | 0.44% |
| OCCIDENTAL PETROLEUM CORPORATION | 1.91% | 0.35% |
| DIAMONDBACK ENERGY, INC. | 1.80% | 0.34% |
| Only in IYE | Only in VO |
|---|---|
| EXXON MOBIL CORPORATION 21.74% | Vertiv Holdings Co 1.23% |
| CHEVRON CORPORATION 15.41% | Western Digital Corp 1.07% |
| CONOCOPHILLIPS 6.51% | Seagate Technology Holdings PLC 1.05% |
| EOG RESOURCES, INC. 3.56% | Quanta Services Inc 1.05% |
| TECHNIPFMC PLC 1.35% | Howmet Aerospace Inc 1.04% |
| COTERRA ENERGY INC. 1.21% | Cummins Inc 0.95% |
| EXPAND ENERGY CORPORATION 1.04% | Datadog Inc 0.84% |
| OVINTIV INC. 0.79% | Bloom Energy Corp 0.79% |
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 Apr 30, 2026 and Jun 30, 2026.
| IYE iShares U.S. Energy ETF | VO Vanguard Mid-Cap Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | U.S. Energy | Mid-Cap |
| Total return, 1 year | +48.8% | +12.0% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +31.3 pts | −5.5 pts |
| Expense ratio | 0.37% | 0.03% |
| Already in the S&P 500 | 89.0% | 91.4% |
| Holdings | 38 | 282 |
IYE in plain words
IYE is an index equity fund tracking the U.S. Energy. Over the year to Sep 11, 2026 it returned +48.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.37% a year. By its holdings filed for Apr 30, 2026, 89% of the fund by weight is stocks the S&P 500 also holds, across 38 positions, with the top ten at 69.0%.
VO in plain words
VO is an index equity fund tracking the Mid-Cap. Over the year to Sep 11, 2026 it returned +12.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year. By its holdings filed for Jun 30, 2026, 91% of the fund by weight is stocks the S&P 500 also holds, across 282 positions, with the top ten at 9.6%. It sat 4.1% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, IYE or VO?
- In the year to Sep 12, 2026, with distributions reinvested, IYE returned +48.8% and VO returned +12.0%, so IYE returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IYE or VO?
- IYE charges 0.37% a year and VO charges 0.03%, so VO is cheaper. Fees come from each fund's prospectus.
- How much do IYE and VO overlap with the S&P 500?
- By their latest filed holdings, 89% of IYE and 91% of VO by weight is stocks the S&P 500 already holds. Between the two funds, 7% of their books are the same securities at the same weight.
Other comparisons
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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, IYE against VO, data as of Sep 12, 2026. https://etfiq.com/compare/any/IYE-VO Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources