VO vs VOO: how much do they overlap?
Vanguard Mid-Cap ETF (VO) · Vanguard S&P 500 ETF (VOO)
overlap by weight · 252 shared holdings
VO: 289 holdings (as of 2026-03-31) · VOO: 504 holdings (as of 2026-03-31)
Low overlap
What this means
VO and VOO hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Overlap by weight sums the smaller of the two funds' weights for every stock they both hold — it answers "how much of my money is in the same stocks either way?" See methodology.
Top shared holdings
| Company | Ticker | in VO | in VOO |
|---|---|---|---|
| Newmont Corp | NEM | 0.64% | 0.21% |
| Corning Inc | GLW | 0.57% | 0.19% |
| Vertiv Holdings Co | VRT | 1.03% | 0.17% |
| Howmet Aerospace Inc | HWM | 1.01% | 0.17% |
| Western Digital Corp | WDC | 1% | 0.16% |
| Williams Cos Inc/The | WMB | 0.48% | 0.16% |
| Constellation Energy Corp | CEG | 0.94% | 0.16% |
| Seagate Technology Holdings PLC | STX | 0.93% | 0.15% |
| Quanta Services Inc | PWR | 0.89% | 0.15% |
| Johnson Controls International plc | JCI | 0.44% | 0.14% |
FAQ
How much do VO and VOO overlap?
VO and VOO have a 16.6% overlap by weight, sharing 252 holdings (out of 289 in VO and 504 in VOO), based on official issuer holdings as of 2026-03-31.
What does 16.6% overlap mean?
VO and VOO hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Which stocks do VO and VOO both hold?
The largest shared positions are Newmont Corp, Corning Inc, Vertiv Holdings Co, Howmet Aerospace Inc, Western Digital Corp. The full list of top shared holdings with weights in each fund is shown on this page.