Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
VO vs XLK: how they differ
VO and XLK hold 7% of their weight in the same names, and XLK returned more over the year.
Vanguard Mid-Cap Index Fund and State Street(R) Technology Select Sector SPDR(R) ETF.
What they hold in common
By the books each fund has filed, VO and XLK hold 7% of their money in the same securities at the same weight.
| Holding | VO | XLK |
|---|---|---|
| Western Digital Corp | 1.07% | 1.23% |
| Datadog Inc | 0.84% | 0.48% |
| Fortinet Inc | 0.46% | 0.53% |
| Coherent Corp | 0.75% | 0.43% |
| Teradyne Inc | 0.73% | 0.42% |
| Ciena Corp | 0.67% | 0.39% |
| Motorola Solutions Inc | 0.67% | 0.38% |
| Monolithic Power Systems Inc | 0.63% | 0.38% |
| Lumentum Holdings Inc | 0.65% | 0.37% |
| Keysight Technologies Inc | 0.58% | 0.34% |
| Hewlett Packard Enterprise Co | 0.58% | 0.33% |
| Microchip Technology Inc | 0.48% | 0.28% |
| Only in VO | Only in XLK |
|---|---|
| Vertiv Holdings Co 1.23% | NVIDIA Corp 14.66% |
| Seagate Technology Holdings PLC 1.05% | Apple Inc 12.86% |
| Quanta Services Inc 1.05% | Microsoft Corp 8.38% |
| Howmet Aerospace Inc 1.04% | Micron Technology Inc 5.42% |
| Cummins Inc 0.95% | Broadcom Inc 5.41% |
| Bloom Energy Corp 0.79% | Advanced Micro Devices Inc 5.28% |
| Constellation Energy Corp 0.78% | Intel Corp 3.68% |
| Robinhood Markets Inc 0.77% | Applied Materials Inc 3.20% |
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 | XLK State Street(R) Technology Select Sector SPDR(R) ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | Vanguard | State Street |
| What it is | Mid-Cap | Technology |
| Total return, 1 year | +12.0% | +39.2% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −5.5 pts | +21.7 pts |
| Expense ratio | 0.03% | 0.08% |
| Already in the S&P 500 | 91.4% | 100.0% |
| Holdings | 282 | 74 |
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.
XLK in plain words
XLK is an index equity fund tracking the Technology. Over the year to Sep 11, 2026 it returned +39.2% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.08% a year. By its holdings filed for Jun 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 74 positions, with the top ten at 64.5%. It sat 5.2% below its high of Jun 2, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, VO or XLK?
- In the year to Sep 12, 2026, with distributions reinvested, VO returned +12.0% and XLK returned +39.2%, so XLK returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, VO or XLK?
- VO charges 0.03% a year and XLK charges 0.08%, so VO is cheaper. Fees come from each fund's prospectus.
- How much do VO and XLK overlap with the S&P 500?
- By their latest filed holdings, 91% of VO and 100% of XLK by weight is stocks the S&P 500 already holds. Between the two funds, 7% 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 XLK, data as of Sep 12, 2026. https://etfiq.com/compare/any/VO-XLK Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources