IVV vs IWB Overlap
Both funds come from IShares. IVV is a U.S. large-cap core ETF, while IWB is an equity ETF. IVV and IWB show very heavy overlap, with an estimated weighted overlap of 92.15%. They share 497 holdings in the loaded dataset, led by NVDA, AAPL, and MSFT.
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Quick Answer
Both funds come from IShares. IVV is a U.S. large-cap core ETF, while IWB is an equity ETF. IVV and IWB show very heavy overlap, with an estimated weighted overlap of 92.15%. They share 497 holdings in the loaded dataset, led by NVDA, AAPL, and MSFT.
- 92.15% weighted overlap across 497 shared holdings.
- The top three shared holdings explain 19.41% of the measured overlap.
- IVV is the broader fund, while IWB is more targeted.
- The overlap is mostly explained by the top shared positions rather than sector labels alone.
- Holding both may add less diversification than the fund names imply.
Data Freshness
- IVV holdings
- Mar 12, 2026
- IWB 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
Both funds come from IShares. IVV is a U.S. large-cap core ETF, while IWB is an equity ETF. IVV and IWB are closely aligned. A large share of their portfolio weight is invested in the same companies, especially NVDA, AAPL, and MSFT, which means holding both is likely to feel similar to increasing the size of one core position.
How They Differ
Both funds come from IShares. IVV is a U.S. large-cap core ETF, while IWB is an equity ETF. IVV is the broader fund, while IWB is the more targeted sleeve. IVV has the lower expense ratio, while IWB 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 19.41% 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, IWB is the narrower expression. IVV has the lower expense ratio, while IWB charges more for its exposure.
Overlap Driver Snapshot
Concentration
The top three shared holdings explain 19.41% 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 IWB.
| Holding | Name | IVV Wt. | IWB Wt. | Overlap |
|---|---|---|---|---|
| NVDA | NVIDIA CORP | 7.73% | 6.95% | 6.95% |
| AAPL | APPLE INC | 6.64% | 6.11% | 6.11% |
| MSFT | MICROSOFT CORP | 5.19% | 4.83% | 4.83% |
| AMZN | AMAZON COM INC | 3.59% | 3.30% | 3.30% |
| GOOGL | ALPHABET INC CLASS A | 3.08% | 2.87% | 2.87% |
| AVGO | BROADCOM INC | 2.79% | 2.54% | 2.54% |
| GOOG | ALPHABET INC CLASS C | 2.46% | 2.33% | 2.33% |
| META | META PLATFORMS INC CLASS A | 2.45% | 2.29% | 2.29% |
| TSLA | TESLA INC | 1.93% | 1.81% | 1.81% |
| BRK-B | BERKSHIRE HATHAWAY INC CLASS B | 1.56% | 1.46% | 1.46% |
Why These ETFs Overlap
Both funds come from IShares. IVV is a U.S. large-cap core ETF, while IWB is an equity ETF. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are NVDA, AAPL, and MSFT, which appear in both portfolios and push the overlap score higher.
Holding both IVV and IWB is usually redundant unless you have a very specific reason to tilt toward their shared holdings. In most cases, one ETF is enough.
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Frequently Asked Questions About IVV and IWB
What is the overlap between IVV and IWB?+
How many holdings do IVV and IWB share?+
Is the IVV and IWB overlap high?+
Why do IVV and IWB 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.