Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
VO vs VUG: how they differ
VO and VUG hold 12% of their weight in the same names, and VUG returned more over the year.
Vanguard Mid-Cap Index Fund and Vanguard Growth Index Fund.
What they hold in common
By the books each fund has filed, VO and VUG hold 12% of their money in the same securities at the same weight.
| Holding | VO | VUG |
|---|---|---|
| Western Digital Corp | 1.07% | 0.62% |
| Seagate Technology Holdings PLC | 1.05% | 0.61% |
| Vertiv Holdings Co | 1.23% | 0.37% |
| Quanta Services Inc | 1.05% | 0.31% |
| Howmet Aerospace Inc | 1.04% | 0.31% |
| Fortinet Inc | 0.46% | 0.28% |
| Datadog Inc | 0.84% | 0.26% |
| Snowflake Inc | 0.41% | 0.25% |
| Bloom Energy Corp | 0.79% | 0.24% |
| Cloudflare Inc | 0.76% | 0.23% |
| Robinhood Markets Inc | 0.77% | 0.23% |
| Coherent Corp | 0.75% | 0.23% |
| Only in VO | Only in VUG |
|---|---|
| Cummins Inc 0.95% | NVIDIA Corp 12.63% |
| Constellation Energy Corp 0.78% | Apple Inc 11.67% |
| Valero Energy Corp 0.75% | Microsoft Corp 7.62% |
| Marathon Petroleum Corp 0.72% | Alphabet Inc 5.76% |
| CRH PLC 0.69% | Alphabet Inc 4.54% |
| United Rentals Inc 0.69% | Amazon.com Inc 4.47% |
| General Motors Co 0.67% | Broadcom Inc 4.29% |
| SLB Ltd 0.67% | Meta Platforms Inc 3.41% |
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 | VUG Vanguard Growth Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | Vanguard | Vanguard |
| What it is | Mid-Cap | US growth |
| Total return, 1 year | +12.0% | +12.9% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −5.5 pts | −4.6 pts |
| Expense ratio | 0.03% | 0.03% |
| Already in the S&P 500 | 91.4% | 97.4% |
| Holdings | 282 | 147 |
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.
VUG in plain words
VUG is an index equity fund tracking the US growth. Over the year to Sep 11, 2026 it returned +12.9% 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, 97% of the fund by weight is stocks the S&P 500 also holds, across 147 positions, with the top ten at 60.5%.
Questions people ask
- Which returned more over the last year, VO or VUG?
- In the year to Sep 12, 2026, with distributions reinvested, VO returned +12.0% and VUG returned +12.9%, so VUG returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, VO or VUG?
- VO charges 0.03% a year and VUG charges 0.03%, so VO is cheaper. Fees come from each fund's prospectus.
- How much do VO and VUG overlap with the S&P 500?
- By their latest filed holdings, 91% of VO and 97% of VUG by weight is stocks the S&P 500 already holds. Between the two funds, 12% 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 VUG, data as of Sep 12, 2026. https://etfiq.com/compare/any/VO-VUG Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources