Both funds come from Vanguard. VB is a small-cap U.S. equity ETF, while VOO is a U.S. large-cap core ETF. VB and VOO show limited overlap, with an estimated weighted overlap of 3.36%. They share 122 holdings in the loaded dataset, led by CIEN, LITE, and FIX.
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Both funds come from Vanguard. VB is a small-cap U.S. equity ETF, while VOO is a U.S. large-cap core ETF. VB and VOO show limited overlap, with an estimated weighted overlap of 3.36%. They share 122 holdings in the loaded dataset, led by CIEN, LITE, and FIX.
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Both funds come from Vanguard. VB is a small-cap U.S. equity ETF, while VOO is a U.S. large-cap core ETF. VB and VOO 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 CIEN, LITE, and FIX.
Both funds come from Vanguard. VB is a small-cap U.S. equity ETF, while VOO is a U.S. large-cap core ETF. VOO is the broader fund, while VB is the more targeted sleeve. VB and VOO are priced very similarly on expense ratio.
The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 8.17% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.
If you want the broader portfolio building block, VOO is usually the wider choice. If you want the more focused tilt, VB is the narrower expression. VB and VOO are priced very similarly on expense ratio.
Concentration
The top three shared holdings explain 8.17% 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.
These are the holdings contributing the most to the overlap score between VB and VOO.
| Holding | Name | VB Wt. | VOO Wt. | Overlap |
|---|---|---|---|---|
| CIEN | Ciena Corp | 0.38% | 0.10% | 0.10% |
| LITE | Lumentum Holdings Inc | 0.35% | 0.09% | 0.09% |
| FIX | Comfort Systems USA Inc | 0.34% | 0.09% | 0.09% |
| COHR | Coherent Corp | 0.31% | 0.08% | 0.08% |
| EQT | EQT Corp | 0.28% | 0.07% | 0.07% |
| EME | EMCOR Group Inc | 0.46% | 0.06% | 0.06% |
| NRG | NRG Energy Inc | 0.43% | 0.06% | 0.06% |
| ATO | Atmos Energy Corp | 0.43% | 0.05% | 0.05% |
| DOW | Dow Inc | 0.21% | 0.05% | 0.05% |
| TPR | Tapestry Inc | 0.40% | 0.05% | 0.05% |
Both funds come from Vanguard. VB is a small-cap U.S. equity ETF, while VOO is a U.S. large-cap core ETF. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are CIEN, LITE, and FIX, which appear in both portfolios and push the overlap score higher.
Holding both VB and VOO 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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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.