VO vs VOO: Holdings Overlap
Vanguard · 289 holdings · $109.2B · as of 2026-03-31
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
How similar are VO and VOO?
Vanguard Mid-cap Index Fund (VO, by Vanguard) holds 289 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 252 holdings in common, and by portfolio weight the two funds are 16.6% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 16.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 252VO holds 289 · VOO holds 504
- Weight in Shared Holdings
- VO 91%·VOO 17%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 VO
37 of 289 positions (8.5% of the fund) are not held by VOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | VO | VOO |
|---|---|---|
| Information Technology | 14.2% | 32.7% |
| Industrials | 18.4% | 9.0% |
| Financials | 13.8% | 12.4% |
| Communication Services | 3.1% | 10.5% |
| Consumer Discretionary | 9.3% | 9.9% |
| Other Sectors | 40.9% | 25.3% |
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 |
|---|---|---|---|---|---|---|---|
| VO | +2.6% | +14.8% | +18.0% | +15.7% | +8.0% | +11.6% | 1.29% |
| VOO | +3.4% | +14.0% | +23.7% | +21.3% | +13.4% | +15.4% | 1.03% |
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 VO vs VOO →
Shared Holdings(252)
The top 10 shared positions account for 10% of the overlap, led by NEM, GLW and VRT.
 NEMNewmont Corporation COM | 0.64% | 0.21% | 0.21% |
|---|---|---|---|
 GLWCorning Incorporated COM | 0.57% | 0.19% | 0.19% |
 VRTVertiv Holdings Co., Class A | 1.03% | 0.17% | 0.17% |
 HWMHowmet Aerospace Inc COM | 1.01% | 0.17% | 0.17% |
 WDCWestern Digital Corp. COM | 1.00% | 0.16% | 0.16% |
 WMBWilliams Companies Inc. (The) COM | 0.48% | 0.16% | 0.16% |
 CEGConstellation Energy Corp. COM | 0.94% | 0.16% | 0.16% |
 STXSeagate Technology Holdings PLC ORD SHS | 0.93% | 0.15% | 0.15% |
 PWRQuanta Services, Inc. COM | 0.89% | 0.15% | 0.15% |
 JCIJohnson Controls International PLC COM USD1.00 | 0.44% | 0.14% | 0.14% |
 FDXFedEx Corporation COM | 0.41% | 0.14% | 0.14% |
 SLBSLB Ltd. COM USD0.01 | 0.84% | 0.14% | 0.14% |
 VLOValero Energy Corp. COM | 0.80% | 0.13% | 0.13% |
 CMICummins Inc. COM | 0.81% | 0.13% | 0.13% |
 PSXPhillips 66 COM | 0.80% | 0.13% | 0.13% |
 MPCMarathon Petroleum Corp. COM | 0.78% | 0.13% | 0.13% |
 MSIMotorola Solutions Inc COM NEW | 0.78% | 0.13% | 0.13% |
 CRHCRH plc | 0.77% | 0.13% | 0.13% |
 ROSTRoss Stores Inc COM | 0.76% | 0.13% | 0.13% |
 HLTHilton Worldwide Holdings Inc COM | 0.38% | 0.12% | 0.12% |
 RCLRoyal Caribbean Group COM USD0.01 | 0.73% | 0.12% | 0.12% |
 WBDWarner Bros. Discovery Inc. COM SER A | 0.70% | 0.12% | 0.12% |
 GMGeneral Motors Company COM | 0.73% | 0.12% | 0.12% |
 KMIKinder Morgan, Inc. COM | 0.35% | 0.12% | 0.12% |
 TDGTransdigm Group Inc. COM | 0.71% | 0.12% | 0.12% |
Showing the top 250 of 252 shared holdings by overlap weight.
Frequently Asked Questions
How much do VO and VOO overlap?
VO and VOO overlap by 16.6% of portfolio weight. They share 252 holdings (VO holds 289 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both VO and VOO?
The two portfolios are 16.6% 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 VO and VOO?
The largest positions held by both funds are NEM, GLW, VRT, HWM and WDC. Together the top 10 shared positions account for 10% of the total overlap.
What does VO own that VOO doesn't?
37 positions (8.5% of VO) are unique to VO, led by NET, LNG and FERG. In the other direction, 252 positions (83.2% of VOO) are unique to VOO.