IWR vs VO: Differences, Returns & Fees
IWR and VO hold 55% of their weight in the same names, and IWR returned +15.1% over the year. Net assets: $57.0bn on Oct 20, 2026 for iShares Russell Mid-Cap ETF, and $103.4bn on Sep 30, 2026 for Vanguard Morningstar Mid-Cap ETF.
VO costs 0.15 points a year less; their one-year returns differ by 2.7 points; VO is 1.9 times larger.
| IWR | VO | |
|---|---|---|
| Expense ratio | 0.18% | 0.03% |
| Net assets, as of Sep 30, 2026 | $54.9bn | $103.4bn |
| Total return, 1 year | +15.1% | +12.4% |
| What it tracks | Russell Midcap Index | Morningstar US Mid Cap Index (formerly CRSP US Mid Cap Index) |
| Holdings in common | 55% | |
| Top ten holdings, share of the fund | 6.8% | 9.7% |
| Below its high | 4.3%, high on Aug 14, 2026 | 3.8%, high on Aug 14, 2026 |
Holdings in common uses holdings dated Sep 30, 2026 and Oct 19, 2026.
IWR and VO are built for the same job. How do they differ in cost, holdings and results?
- What each follows. IWR follows Russell Midcap Index and VO follows Morningstar US Mid Cap Index (formerly CRSP US Mid Cap Index).
- One-year total return. Over 1 year to Oct 20, 2026 IWR returned +15.1% and VO +12.4% with distributions reinvested, a gap of 2.7 points.
- Number of holdings. IWR holds 825 positions and VO holds 273.
Data as of Oct 20, 2026. The differences are picked by a fixed rule, in a fixed order; the PDF prints it. Page 2 has the returns, overlap, risks and sources.
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What they hold in common
By the books each fund has filed, IWR and VO hold 55% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 19, 2026.
half
55% in common
On the same fields
IWR and VO on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About IWR
IWR tracks an index. The prospectus expense ratio is 0.18% a year. By its holdings published by its issuer for Oct 19, 2026, 62% of the fund by weight is stocks the S&P 500 also holds, across 825 positions, with the top ten at 6.8%. It sat 4.3% below its high of Aug 14, 2026 on Oct 20, 2026.
Over the year to Oct 20, 2026 it returned +15.1% with distributions reinvested, against +15.0% for its benchmark, the Russell 3000 Index.
About VO
VO tracks an index of Mid-Cap. Over the year to Oct 20, 2026 it returned +12.4% with distributions reinvested. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer as of Sep 30, 2026, 91% of the fund by weight is stocks the S&P 500 also holds, across 273 positions, with the top ten at 9.7%. It sat 3.8% below its high of Aug 14, 2026 on Oct 20, 2026.
Questions people ask
- Which returned more over the last year, IWR or VO?
- In the year to Oct 20, 2026, with distributions reinvested, IWR returned +15.1% and VO +12.4%.
- Which is cheaper, IWR or VO?
- VO is cheaper, by 0.15 percentage points a year. That is about $15 on $10,000 held for a year. Fees come from each fund's prospectus.
ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
Cite this pageCitation, APA and Markdown
ETFIQ, IWR against VO, data as of Oct 20, 2026. https://etfiq.com/compare/any/iwr-vs-vo
ETFIQ. (Oct 20, 2026). IWR against VO. Retrieved from https://etfiq.com/compare/any/iwr-vs-vo
[IWR against VO (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/iwr-vs-vo)
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.