VB vs VIOO: Holdings Overlap
VBVanguard Small-cap Index Fund
Vanguard · 1312 holdings · $82.5B · as of 2026-03-31
VIOOVanguard S&P Small-cap 600 Index Fund
Vanguard · 603 holdings · $4.4B · as of 2026-05-31
Holdings snapshots are 61 days apart (VB: 2026-03-31, VIOO: 2026-05-31). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are VB and VIOO?
Vanguard Small-cap Index Fund (VB, by Vanguard) holds 1312 positions; Vanguard S&P Small-cap 600 Index Fund (VIOO, by Vanguard) holds 603. They have 471 holdings in common, and by portfolio weight the two funds are 18.2% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 18.2%Sum of the smaller weight of each shared holding
- Shared Holdings
- 471VB holds 1312 · VIOO holds 603
- Weight in Shared Holdings
- VB 18%·VIOO 87%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in VB
841 of 1312 positions (81.5% of the fund) are not held by VIOO. Showing the top 30 by weight.
Only in VIOO
132 of 603 positions (12.8% of the fund) are not held by VB. Showing the top 30 by weight.
Sector Breakdown
| Sector | VB | VIOO |
|---|---|---|
| Industrials | 21.2% | 17.2% |
| Financials | 13.4% | 17.6% |
| Information Technology | 13.8% | 15.9% |
| Consumer Discretionary | 10.5% | 12.9% |
| Health Care | 11.6% | 11.0% |
| Other Sectors | 28.5% | 25.2% |
| Unclassified | 0.7% | 0.0% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts. “Unclassified” is weight we could not classify (1% of VB, 0% of VIOO).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| VB | +2.5% | +19.5% | +29.1% | +15.9% | +8.1% | +11.3% | 1.18% |
| VIOO | +2.4% | +24.4% | +36.3% | +14.6% | +7.7% | +10.9% | 1.09% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in VB vs VIOO →
Shared Holdings(471)
The top 10 shared positions account for 6% of the overlap, led by EMN, ESI and VIAV.
 EMNEastman Chemical Company COM | 0.12% | 0.51% | 0.12% |
|---|---|---|---|
 ESIElement Solutions Inc COM | 0.12% | 0.57% | 0.12% |
 VIAVViavi Solutions Inc COM | 0.11% | 0.66% | 0.11% |
 FORMFormfactor Inc COM | 0.11% | 0.57% | 0.11% |
 LKQLKQ Corporation COM | 0.10% | 0.41% | 0.10% |
 JXNJackson Financial, Inc., Class A | 0.10% | 0.43% | 0.10% |
 SMSM Energy Co. COM | 0.10% | 0.41% | 0.10% |
 PRIMPrimoris Services Corp. COM | 0.10% | 0.40% | 0.10% |
 ESEESCO Technologies Inc. COM | 0.10% | 0.44% | 0.10% |
 CECelanese Corporation COM | 0.10% | 0.34% | 0.10% |
 MTCHMatch Group Inc COM | 0.10% | 0.50% | 0.10% |
 SMTCSemtech Corporation COM | 0.10% | 0.83% | 0.10% |
 ZWSZurn Elkay Water Solutions Corporation COM | 0.10% | 0.41% | 0.10% |
 AWIArmstrong World Industries, Inc. COM | 0.10% | 0.40% | 0.10% |
 MOHMolina Healthcare, Inc. COM | 0.10% | 0.53% | 0.10% |
 KRYSKrystal Biotech Inc COM | 0.10% | 0.47% | 0.10% |
 LNCLincoln National Corp. COM | 0.09% | 0.35% | 0.09% |
 SANMSanmina Corporation | 0.09% | 0.83% | 0.09% |
 PTGXProtagonist Therapeutics Inc COM | 0.09% | 0.34% | 0.09% |
 JBTMJBT Marel Corp. COM | 0.09% | 0.41% | 0.09% |
 FSSFederal Signal Corp. COM | 0.09% | 0.38% | 0.09% |
 QRVOQorvo Inc COM | 0.09% | 0.51% | 0.09% |
 LUMNLumen Technologies Inc COM | 0.09% | 0.61% | 0.09% |
 TRNOTerreno Realty Corporation COM | 0.09% | 0.40% | 0.09% |
 EPRTEssential Properties Realty Trust Inc. COM | 0.09% | 0.38% | 0.09% |
Showing the top 250 of 471 shared holdings by overlap weight.
Frequently Asked Questions
How much do VB and VIOO overlap?
VB and VIOO overlap by 18.2% of portfolio weight. They share 471 holdings (VB holds 1312 positions and VIOO holds 603), based on each fund's latest SEC-reported holdings.
Is it redundant to own both VB and VIOO?
The two portfolios are 18.2% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of VB and VIOO?
The largest positions held by both funds are EMN, ESI, VIAV, FORM and LKQ. Together the top 10 shared positions account for 6% of the total overlap.
What does VB own that VIOO doesn't?
841 positions (81.5% of VB) are unique to VB, led by EME, NRG and ATO. In the other direction, 132 positions (12.8% of VIOO) are unique to VIOO.