IVV vs VO Overlap
IVV is a U.S. large-cap core ETF from IShares, while VO is a mid-cap U.S. equity ETF from Vanguard. IVV and VO show limited overlap, with an estimated weighted overlap of 15.09%. They share 239 holdings in the loaded dataset, led by NEM, GLW, and HWM.
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Quick Answer
IVV is a U.S. large-cap core ETF from IShares, while VO is a mid-cap U.S. equity ETF from Vanguard. IVV and VO show limited overlap, with an estimated weighted overlap of 15.09%. They share 239 holdings in the loaded dataset, led by NEM, GLW, and HWM.
- 15.09% weighted overlap across 239 shared holdings.
- The top three shared holdings explain 3.86% of the measured overlap.
- IVV is the broader fund, while VO 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
- IVV holdings
- Mar 12, 2026
- VO 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
IVV is a U.S. large-cap core ETF from IShares, while VO is a mid-cap U.S. equity ETF from Vanguard. IVV and VO 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 NEM, GLW, and HWM.
How They Differ
IVV is a U.S. large-cap core ETF from IShares, while VO is a mid-cap U.S. equity ETF from Vanguard. IVV is the broader fund, while VO is the more targeted sleeve. IVV and VO are priced very similarly on expense ratio.
What Drives The Overlap
The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 3.86% 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, IVV is usually the wider choice. If you want the more focused tilt, VO is the narrower expression. IVV and VO are priced very similarly on expense ratio.
Overlap Driver Snapshot
Concentration
The top three shared holdings explain 3.86% 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 IVV and VO.
| Holding | Name | IVV Wt. | VO Wt. | Overlap |
|---|---|---|---|---|
| NEM | NEWMONT | 0.22% | 1.31% | 0.22% |
| GLW | CORNING INC | 0.18% | 0.85% | 0.18% |
| HWM | HOWMET AEROSPACE INC | 0.18% | 0.89% | 0.18% |
| CEG | CONSTELLATION ENERGY CORP | 0.17% | 0.94% | 0.17% |
| WDC | WESTERN DIGITAL CORP | 0.16% | 0.91% | 0.16% |
| WMB | WILLIAMS INC | 0.15% | 0.44% | 0.15% |
| PWR | QUANTA SERVICES INC | 0.14% | 0.76% | 0.14% |
| STX | SEAGATE TECHNOLOGY HOLDINGS PLC | 0.14% | 0.93% | 0.14% |
| FDX | FEDEX CORP | 0.13% | 0.36% | 0.13% |
| CMI | CUMMINS INC | 0.13% | 0.85% | 0.13% |
Why These ETFs Overlap
IVV is a U.S. large-cap core ETF from IShares, while VO is a mid-cap 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 NEM, GLW, and HWM, which appear in both portfolios and push the overlap score higher.
Holding both IVV and VO 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 IVV and VO
What is the overlap between IVV and VO?+
How many holdings do IVV and VO share?+
Is the IVV and VO overlap high?+
Why do IVV and VO 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.