IWR vs VTI Overlap
IWR is a mid-cap U.S. equity ETF from IShares, while VTI is a total-market U.S. equity ETF from Vanguard. IWR and VTI show limited overlap, with an estimated weighted overlap of 18.23%. They share 749 holdings in the loaded dataset, led by WDC, HWM, and BK.
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Quick Answer
IWR is a mid-cap U.S. equity ETF from IShares, while VTI is a total-market U.S. equity ETF from Vanguard. IWR and VTI show limited overlap, with an estimated weighted overlap of 18.23%. They share 749 holdings in the loaded dataset, led by WDC, HWM, and BK.
- 18.23% weighted overlap across 749 shared holdings.
- The top three shared holdings explain 2.08% of the measured overlap.
- VTI is the broader fund, while IWR is more targeted.
- The overlap is mostly explained by the top shared positions rather than sector labels alone.
- Holding both can still add materially different exposure.
Data Freshness
- IWR holdings
- Mar 12, 2026
- VTI holdings
- Mar 12, 2026
- Overlap computed
- Mar 13, 2026
- Data source
- Financial Modeling Prep
Review the methodology for the overlap formula and refresh policy.
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About These ETFs
What Stands Out In This Comparison
What This Means
IWR is a mid-cap U.S. equity ETF from IShares, while VTI is a total-market U.S. equity ETF from Vanguard. IWR and VTI do not own much of the same portfolio weight. That usually means you are combining different parts of the market, with only a small amount of duplication through names like WDC, HWM, and BK.
How They Differ
IWR is a mid-cap U.S. equity ETF from IShares, while VTI is a total-market U.S. equity ETF from Vanguard. VTI is the broader fund, while IWR is the more targeted sleeve. VTI has the lower expense ratio, while IWR charges more for its exposure.
What Drives The Overlap
The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 2.08% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.
When One May Fit Better
If you want the broader portfolio building block, VTI is usually the wider choice. If you want the more focused tilt, IWR is the narrower expression. VTI has the lower expense ratio, while IWR charges more for its exposure.
Overlap Driver Snapshot
Concentration
The top three shared holdings explain 2.08% of the full overlap score.
That helps show whether the score comes from a handful of giant shared positions or from a broader mix of common holdings.
Shared Sector Tilt
Sector tags are not consistently available for the biggest shared positions in this dataset, so this comparison leans more on the specific holdings than on sector labels.
Top Shared Holdings
These are the holdings contributing the most to the overlap score between IWR and VTI.
| Holding | Name | IWR Wt. | VTI Wt. | Overlap |
|---|---|---|---|---|
| WDC | WESTERN DIGITAL CORP | 0.70% | 0.13% | 0.13% |
| HWM | HOWMET AEROSPACE INC | 0.79% | 0.13% | 0.13% |
| BK | BANK OF NEW YORK MELLON CORP | 0.63% | 0.13% | 0.13% |
| CMI | CUMMINS INC | 0.60% | 0.12% | 0.12% |
| SNDK | SANDISK CORP | 0.68% | 0.12% | 0.12% |
| GLW | CORNING INC | 0.83% | 0.12% | 0.12% |
| HOOD | ROBINHOOD MARKETS INC CLASS A | 0.45% | 0.12% | 0.12% |
| VRT | VERTIV HOLDINGS CLASS A | 0.80% | 0.11% | 0.11% |
| PWR | QUANTA SERVICES INC | 0.65% | 0.11% | 0.11% |
| HLT | HILTON WORLDWIDE HOLDINGS INC | 0.53% | 0.10% | 0.10% |
Why These ETFs Overlap
IWR is a mid-cap U.S. equity ETF from IShares, while VTI is a total-market U.S. equity ETF from Vanguard. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are WDC, HWM, and BK, which appear in both portfolios and push the overlap score higher.
Holding both IWR and VTI can make sense if you want exposure to different sleeves of the market. The overlap is small enough that both funds may still improve diversification.
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Frequently Asked Questions About IWR and VTI
What is the overlap between IWR and VTI?+
How many holdings do IWR and VTI share?+
Is the IWR and VTI overlap high?+
Why do IWR and VTI overlap?+
Which ETF is broader, IWR or VTI?+
How Overlap Is Calculated
A straightforward approach used by portfolio analysts.
For every stock that appears in both ETFs, we take the smaller of the two weights. Adding up all those minimums gives the total overlap percentage. A score of 100% means the two ETFs hold the exact same stocks in the same proportions.
Want the full explanation? Read the methodology page.