VIOO vs VTI: Holdings Overlap
VIOOVanguard S&P Small-cap 600 Index Fund
Vanguard · 603 holdings · $4.4B · as of 2026-05-31
VTIVanguard Total Stock Market Index Fund
Vanguard · 3505 holdings · $696.4B · as of 2026-03-31
Holdings snapshots are 61 days apart (VIOO: 2026-05-31, VTI: 2026-03-31). 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 VIOO and VTI?
Vanguard S&P Small-cap 600 Index Fund (VIOO, by Vanguard) holds 603 positions; Vanguard Total Stock Market Index Fund (VTI, by Vanguard) holds 3505. They have 597 holdings in common, and by portfolio weight the two funds are 2.4% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 2.4%Sum of the smaller weight of each shared holding
- Shared Holdings
- 597VIOO holds 603 · VTI holds 3505
- Weight in Shared Holdings
- VIOO 99%·VTI 2%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 VIOO
6 of 603 positions (1.1% of the fund) are not held by VTI.
Sector Breakdown
| Sector | VIOO | VTI |
|---|---|---|
| Information Technology | 15.9% | 30.5% |
| Financials | 17.6% | 12.7% |
| Industrials | 17.2% | 10.4% |
| Consumer Discretionary | 12.9% | 9.8% |
| Health Care | 11.0% | 10.0% |
| Other Sectors | 25.2% | 26.0% |
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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| VIOO | +2.4% | +24.4% | +36.3% | +14.6% | +7.7% | +10.9% | 1.09% |
| VTI | +3.3% | +14.6% | +24.2% | +20.9% | +12.3% | +14.9% | 1.02% |
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 VIOO vs VTI →
Shared Holdings(597)
The top 10 shared positions account for 5% of the overlap, led by EMN, ESI and VIAV.
 EMNEastman Chemical Company COM | 0.51% | 0.01% | 0.01% |
|---|---|---|---|
 ESIElement Solutions Inc COM | 0.57% | 0.01% | 0.01% |
 VIAVViavi Solutions Inc COM | 0.66% | 0.01% | 0.01% |
 LKQLKQ Corporation COM | 0.41% | 0.01% | 0.01% |
 FORMFormfactor Inc COM | 0.57% | 0.01% | 0.01% |
 JXNJackson Financial, Inc., Class A | 0.43% | 0.01% | 0.01% |
 SMSM Energy Co. COM | 0.41% | 0.01% | 0.01% |
 PRIMPrimoris Services Corp. COM | 0.40% | 0.01% | 0.01% |
 ESEESCO Technologies Inc. COM | 0.44% | 0.01% | 0.01% |
 CECelanese Corporation COM | 0.34% | 0.01% | 0.01% |
 MTCHMatch Group Inc COM | 0.50% | 0.01% | 0.01% |
 ZWSZurn Elkay Water Solutions Corporation COM | 0.41% | 0.01% | 0.01% |
 SMTCSemtech Corporation COM | 0.83% | 0.01% | 0.01% |
 AGXArgan Inc COM | 0.54% | 0.01% | 0.01% |
 AWIArmstrong World Industries, Inc. COM | 0.40% | 0.01% | 0.01% |
 MOHMolina Healthcare, Inc. COM | 0.53% | 0.01% | 0.01% |
 PTGXProtagonist Therapeutics Inc COM | 0.34% | 0.01% | 0.01% |
 KRYSKrystal Biotech Inc COM | 0.47% | 0.01% | 0.01% |
 LNCLincoln National Corp. COM | 0.35% | 0.01% | 0.01% |
 SANMSanmina Corporation | 0.83% | 0.01% | 0.01% |
 JBTMJBT Marel Corp. COM | 0.41% | 0.01% | 0.01% |
 FSSFederal Signal Corp. COM | 0.38% | 0.01% | 0.01% |
 QRVOQorvo Inc COM | 0.51% | 0.01% | 0.01% |
 LUMNLumen Technologies Inc COM | 0.61% | 0.01% | 0.01% |
 TRNOTerreno Realty Corporation COM | 0.40% | 0.01% | 0.01% |
Showing the top 250 of 597 shared holdings by overlap weight.
Frequently Asked Questions
How much do VIOO and VTI overlap?
VIOO and VTI overlap by 2.4% of portfolio weight. They share 597 holdings (VIOO holds 603 positions and VTI holds 3505), based on each fund's latest SEC-reported holdings.
Is it redundant to own both VIOO and VTI?
The two portfolios are 2.4% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of VIOO and VTI?
The largest positions held by both funds are EMN, ESI, VIAV, LKQ and FORM. Together the top 10 shared positions account for 5% of the total overlap.
What does VIOO own that VTI doesn't?
6 positions (1.1% of VIOO) are unique to VIOO, led by KLIC, SEDG and VGNT. In the other direction, 2908 positions (97.3% of VTI) are unique to VTI.