IWM vs VT Overlap
IWM is an equity ETF from IShares, while VT is an equity ETF from Vanguard. IWM and VT show limited overlap, with an estimated weighted overlap of 1.81%. They share 553 holdings in the loaded dataset, led by BE, STC, and BHE.
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Quick Answer
IWM is an equity ETF from IShares, while VT is an equity ETF from Vanguard. IWM and VT show limited overlap, with an estimated weighted overlap of 1.81%. They share 553 holdings in the loaded dataset, led by BE, STC, and BHE.
- 1.81% weighted overlap across 553 shared holdings.
- The top three shared holdings explain 3.81% of the measured overlap.
- VT is the broader fund, while IWM 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
- IWM holdings
- Mar 12, 2026
- VT holdings
- Mar 12, 2026
- Overlap computed
- Mar 15, 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
IWM is an equity ETF from IShares, while VT is an equity ETF from Vanguard. IWM and VT 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 BE, STC, and BHE.
How They Differ
IWM is an equity ETF from IShares, while VT is an equity ETF from Vanguard. VT is the broader fund, while IWM is the more targeted sleeve. VT has the lower expense ratio, while IWM 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 3.81% 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, VT is usually the wider choice. If you want the more focused tilt, IWM is the narrower expression. VT has the lower expense ratio, while IWM charges more for its exposure.
Overlap Driver Snapshot
Concentration
The top three shared holdings explain 3.81% 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 IWM and VT.
| Holding | Name | IWM Wt. | VT Wt. | Overlap |
|---|---|---|---|---|
| BE | BLOOM ENERGY CLASS A CORP | 1.14% | 0.03% | 0.03% |
| STC | STEWART INFO SERVICES CORP | 0.06% | 0.02% | 0.02% |
| BHE | BENCHMARK ELECTRONICS INC | 0.07% | 0.02% | 0.02% |
| CRDO | CREDO TECHNOLOGY GROUP HOLDING LTD | 0.58% | 0.02% | 0.02% |
| FN | FABRINET | 0.66% | 0.02% | 0.02% |
| KTOS | KRATOS DEFENSE AND SECURITY SOLUTI | 0.54% | 0.02% | 0.02% |
| NXT | NEXTPOWER INC CLASS A | 0.56% | 0.02% | 0.02% |
| GH | GUARDANT HEALTH INC | 0.37% | 0.01% | 0.01% |
| HL | HECLA MINING | 0.47% | 0.01% | 0.01% |
| CDE | COEUR MINING INC | 0.50% | 0.01% | 0.01% |
Why These ETFs Overlap
IWM is an equity ETF from IShares, while VT is an 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 BE, STC, and BHE, which appear in both portfolios and push the overlap score higher.
Holding both IWM and VT 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 IWM and VT
What is the overlap between IWM and VT?+
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Why do IWM and VT overlap?+
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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.