VOUS mid-cap
VANGUARD MID-CAP INDEX FUND
295holdings
0.03%annual fee
USmarket
Valuation270 companies covered
24.0×P / E91% by weight
3.27×P / B86% by weight
4.2%Earnings yield
ETF comparisons / VO vs VOO
US mid-cap comparison · Holdings dated 2026-06-30
VO vs VOO
VANGUARD MID-CAP INDEX FUND compared with VANGUARD 500 INDEX FUND
Most company exposure is different between these funds.VO has 32 companies outside the overlap; VOO has 256.
Do VO and VOO overlap?
VO and VOO overlap by 16.4% by weight, across 249 shared companies.
VOOUS equity
VANGUARD 500 INDEX FUND
520holdings
0.03%annual fee
USmarket
Valuation494 companies covered
26.8×P / E97% by weight
5.46×P / B85% by weight
3.7%Earnings yield
Price development
Both lines rebased to 0% over their shared dates
Largest shared positions
249 companies held in both funds
VO weight
VOO weight
| Shared company | VO | VOO |
|---|---|---|
| WESTERN DIGITAL CORPORATION WDC | 1.06% | 0.34% |
| SEAGATE TECHNOLOGY HOLDINGS PUBLIC LIMITED COMPANY STX | 1.04% | 0.34% |
| VERTIV HOLDINGS CO VRT | 1.22% | 0.20% |
| Quanta Services Inc PWR | 1.04% | 0.17% |
| HOWMET AEROSPACE INC. HWM | 1.04% | 0.17% |
| Newmont Corp NEM | 0.48% | 0.15% |
| CUMMINS INC. CMI | 0.95% | 0.15% |
| FORTINET, INC. FTNT | 0.46% | 0.15% |
| THE WILLIAMS COMPANIES, INC. WMB | 0.44% | 0.14% |
| JOHNSON CONTROLS INTERNATIONAL PUBLIC LIMITED COMPANY JCI | 0.43% | 0.14% |
| DATADOG INC - CLASS A DDOG | 0.83% | 0.13% |
| CONSTELLATION ENERGY CORPORATION. CEG | 0.78% | 0.12% |
| ROBINHOOD MARKETS INC - A HOOD | 0.77% | 0.12% |
| Royal Caribbean Cruises Ltd RCL | 0.74% | 0.12% |
| Valero Energy Corp VLO | 0.75% | 0.12% |
| Coherent Corp. COHR US | 0.74% | 0.12% |
| TERADYNE INC TER | 0.73% | 0.12% |
| HILTON WORLDWIDE HOLDINGS INC. HLT | 0.36% | 0.12% |
| Marathon Petroleum Corp MPC | 0.72% | 0.12% |
| TransDigm Group Inc TDG | 0.72% | 0.12% |
| AMERICAN ELECTRIC POWER COMPANY, INC. AEP | 0.36% | 0.12% |
| SIMON PROPERTY GROUP INC SPG | 0.66% | 0.11% |
| CRH PUBLIC LIMITED COMPANY CRH | 0.69% | 0.11% |
| United Rentals Inc URI | 0.68% | 0.11% |
| AON PUBLIC LIMITED COMPANY AON | 0.32% | 0.11% |
VO and VOO questions
Based on the holdings compared above
How much do VO and VOO overlap?
VO and VOO overlap by 16.4% by weight, across 249 shared companies.
Which companies do VO and VOO both hold?
The largest companies held in both funds are WESTERN DIGITAL CORPORATION, SEAGATE TECHNOLOGY HOLDINGS PUBLIC LIMITED COMPANY, VERTIV HOLDINGS CO, Quanta Services Inc, HOWMET AEROSPACE INC..
Can I hold both VO and VOO?
Holding both means 16.4% of that part of your portfolio is the same companies counted twice. That can suit you or not depending on your goals; this tool reports the overlap rather than giving advice.
Is VO or VOO cheaper?
VO has a 0.03% expense ratio and VOO has 0.03%.
How do VO and VOO compare on valuation?
VO has a weighted P/E of 24.0 and VOO has a weighted P/E of 26.8.
Compare your own portfolio
Open the analyzerSee the companies and duplicated exposure across every fund you hold.