Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
VO vs VTI: how they differ
VO and VTI hold 16% of their weight in the same names, and VTI returned more over the year.
Vanguard Mid-Cap Index Fund and Vanguard Total Stock Market Index Fund.
What they hold in common
By the books each fund has filed, VO and VTI hold 16% of their money in the same securities at the same weight.
| Holding | VO | VTI |
|---|---|---|
| Western Digital Corp | 1.07% | 0.30% |
| Seagate Technology Holdings PLC | 1.05% | 0.30% |
| Vertiv Holdings Co | 1.23% | 0.18% |
| Quanta Services Inc | 1.05% | 0.15% |
| Howmet Aerospace Inc | 1.04% | 0.15% |
| Newmont Corp | 0.48% | 0.14% |
| Cummins Inc | 0.95% | 0.14% |
| Fortinet Inc | 0.46% | 0.13% |
| Williams Cos Inc/The | 0.44% | 0.13% |
| Johnson Controls International plc | 0.43% | 0.12% |
| Datadog Inc | 0.84% | 0.12% |
| Snowflake Inc | 0.41% | 0.12% |
| Only in VO | Only in VTI |
|---|---|
| NVIDIA Corp 6.37% | |
| Apple Inc 5.88% | |
| Microsoft Corp 3.84% | |
| Amazon.com Inc 3.19% | |
| Alphabet Inc 2.90% | |
| Broadcom Inc 2.48% | |
| Alphabet Inc 2.29% | |
| Micron Technology Inc 1.80% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026.
| VO Vanguard Mid-Cap Index Fund | VTI Vanguard Total Stock Market Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | Vanguard | Vanguard |
| What it is | Mid-Cap | US total market |
| Total return, 1 year | +12.0% | +17.2% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −5.5 pts | −0.3 pts |
| Expense ratio | 0.03% | 0.03% |
| Already in the S&P 500 | 91.4% | 88.3% |
| Holdings | 282 | 3531 |
VO in plain words
VO is an index equity fund tracking the Mid-Cap. Over the year to Sep 11, 2026 it returned +12.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year. By its holdings filed for Jun 30, 2026, 91% of the fund by weight is stocks the S&P 500 also holds, across 282 positions, with the top ten at 9.6%. It sat 4.1% below its high of Aug 14, 2026 on Sep 11, 2026.
VTI in plain words
VTI is an index equity fund tracking the US total market. Over the year to Sep 11, 2026 it returned +17.2% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. By its holdings filed for Jun 30, 2026, 88% of the fund by weight is stocks the S&P 500 also holds, across 3531 positions, with the top ten at 32.1%.
Questions people ask
- Which returned more over the last year, VO or VTI?
- In the year to Sep 12, 2026, with distributions reinvested, VO returned +12.0% and VTI returned +17.2%, so VTI returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, VO or VTI?
- VO charges 0.03% a year and VTI charges 0.03%, so VO is cheaper. Fees come from each fund's prospectus.
- How much do VO and VTI overlap with the S&P 500?
- By their latest filed holdings, 91% of VO and 88% of VTI by weight is stocks the S&P 500 already holds. Between the two funds, 16% of their books are the same securities at the same weight.
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, VO against VTI, data as of Sep 12, 2026. https://etfiq.com/compare/any/VO-VTI Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources