Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
VO vs VXF: how they differ
VO and VXF hold 8% of their weight in the same names, and VXF returned more over the year.
Vanguard Mid-Cap Index Fund and Vanguard Extended Market Index Fund.
What they hold in common
By the books each fund has filed, VO and VXF hold 8% of their money in the same securities at the same weight.
| Holding | VO | VXF |
|---|---|---|
| Bloom Energy Corp | 0.79% | 0.93% |
| Cloudflare Inc | 0.76% | 0.92% |
| Rocket Lab Corp | 0.57% | 0.61% |
| Cheniere Energy Inc | 0.49% | 0.59% |
| Ferguson Enterprises Inc | 0.45% | 0.54% |
| Snowflake Inc | 0.41% | 1.03% |
| Alnylam Pharmaceuticals Inc | 0.39% | 0.47% |
| Astera Labs Inc | 0.36% | 0.76% |
| ROBLOX Corp | 0.34% | 0.43% |
| Coreweave Inc | 0.37% | 0.31% |
| Sunbelt Rentals Holdings Inc | 0.30% | 0.36% |
| Strategy Inc | 0.28% | 0.34% |
| Only in VO | Only in VXF |
|---|---|
| Vertiv Holdings Co 1.23% | Space Exploration Technologies Corp 1.19% |
| Western Digital Corp 1.07% | Credo Technology Group Holding Ltd 0.52% |
| Seagate Technology Holdings PLC 1.05% | Natera Inc 0.46% |
| Quanta Services Inc 1.05% | REVOLUTION Medicines Inc 0.44% |
| Howmet Aerospace Inc 1.04% | Twilio Inc 0.37% |
| Cummins Inc 0.95% | Carpenter Technology Corp 0.36% |
| Datadog Inc 0.84% | MKS Instruments Inc 0.35% |
| Constellation Energy Corp 0.78% | Curtiss-Wright Corp 0.33% |
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 | VXF Vanguard Extended Market Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | Vanguard | Vanguard |
| What it is | Mid-Cap | Extended Market |
| Total return, 1 year | +12.0% | +14.1% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −5.5 pts | −3.4 pts |
| Expense ratio | 0.03% | 0.05% |
| Already in the S&P 500 | 91.4% | 0.0% |
| Holdings | 282 | 3365 |
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.
VXF in plain words
VXF is an index equity fund tracking the Extended Market. Over the year to Sep 11, 2026 it returned +14.1% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.05% a year. By its holdings filed for Jun 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 3365 positions, with the top ten at 7.6%. It sat 5.1% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, VO or VXF?
- In the year to Sep 12, 2026, with distributions reinvested, VO returned +12.0% and VXF returned +14.1%, so VXF returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, VO or VXF?
- VO charges 0.03% a year and VXF charges 0.05%, so VO is cheaper. Fees come from each fund's prospectus.
- How much do VO and VXF overlap with the S&P 500?
- By their latest filed holdings, 91% of VO and 0% of VXF by weight is stocks the S&P 500 already holds. Between the two funds, 8% of their books are the same securities at the same weight.
Other comparisons
Where to next
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 VXF, data as of Sep 12, 2026. https://etfiq.com/compare/any/VO-VXF Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources