VO vs XLK ETF holdings comparison
Vanguard Mid-Cap ETF (VO) · Technology Select Sector SPDR ETF (XLK)
VO and XLK overlap by 10% by portfolio weight. The remaining 90.0 percentage points are not counted as shared holdings weight by this calculation. They share 33 stocks; the largest shared position is Western Digital Corp (WDC), contributing 1.00% to the overlap.
The holdings dates differ. This can slightly understate overlap for funds tracking similar indexes.
What this means
VO and XLK share a smaller portion of their portfolio weight in the same underlying stocks. OverlapCheck labels this "low holdings overlap" using house ranges of 70% or more, 30% to under 70%, and under 30%. These descriptive ranges are not industry standards or investment guidance. Holdings overlap does not measure correlation, volatility, geographic or factor exposure, fees, or suitability.
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.
This comparison covers normalized equity positions represented in the dataset. Cash, derivatives, options, structured notes, and other non-equity assets are not included, so the result is not a complete comparison of every asset or risk in either fund.
Top shared holdings
| Company | Ticker | in VO | in XLK |
|---|---|---|---|
| Western Digital Corp | WDC | 1.00% | 1.05% |
| Seagate Technology Holdings PLC | STX | 0.93% | 1.24% |
| Corning Inc | GLW | 0.57% | 0.78% |
| Motorola Solutions Inc | MSI | 0.78% | 0.54% |
| Marvell Technology Inc | MRVL | 0.47% | 1.42% |
| Monolithic Power Systems Inc | MPWR | 0.55% | 0.43% |
| Datadog Inc | DDOG | 0.42% | 0.50% |
| TE Connectivity PLC | TEL | 0.67% | 0.40% |
| Teradyne Inc | TER | 0.51% | 0.39% |
| Keysight Technologies Inc | KEYS | 0.53% | 0.37% |
Holdings only in VO or XLK
VO has 255 fund-only positions representing approximately 88.0 percentage points of reported exposure; XLK has 40 fund-only positions representing approximately 87.1 percentage points of reported exposure. These are positions whose normalized security identifiers appear in one issuer file but not the other.
Largest positions only in VO
| Company | Ticker | Weight |
|---|---|---|
| Vertiv Holdings Co | VRT | 1.03% |
| Howmet Aerospace Inc | HWM | 1.01% |
| Constellation Energy Corp | CEG | 0.94% |
| Quanta Services Inc | PWR | 0.89% |
| SLB Ltd | SLB | 0.84% |
| Cummins Inc | CMI | 0.81% |
| Valero Energy Corp | VLO | 0.80% |
| Phillips 66 | PSX | 0.80% |
| Marathon Petroleum Corp | MPC | 0.78% |
| CRH PLC | CRH | 0.77% |
Largest positions only in XLK
| Company | Ticker | Weight |
|---|---|---|
| Nvidia Corp | NVDA | 14.22% |
| Apple Inc | AAPL | 12.54% |
| Microsoft Corp | MSFT | 10.07% |
| Broadcom Inc | AVGO | 4.66% |
| Advanced Micro Devices | AMD | 4.10% |
| Micron Technology Inc | MU | 3.99% |
| Cisco Systems Inc | CSCO | 2.95% |
| Intel Corp | INTC | 2.91% |
| Palantir Technologies Inc A | PLTR | 2.67% |
| Lam Research Corp | LRCX | 2.65% |
FAQ
How much do VO and XLK overlap?
VO and XLK have 10% overlap by weight, sharing 33 equity positions (out of 288 in VO and 73 in XLK). The official holdings files used are dated 2026-03-31 for VO and 2026-08-25 for XLK.
What does 10% overlap mean?
VO and XLK share a smaller portion of their portfolio weight in the same underlying stocks. OverlapCheck labels this "low holdings overlap" using house ranges of 70% or more, 30% to under 70%, and under 30%. These descriptive ranges are not industry standards or investment guidance. Holdings overlap does not measure correlation, volatility, geographic or factor exposure, fees, or suitability.
Which stocks do VO and XLK both hold?
The largest shared positions are Western Digital Corp, Seagate Technology Holdings PLC, Corning Inc, Motorola Solutions Inc, Marvell Technology Inc. The top shared holdings with weights in each fund are shown on this page.
What holdings are different between VO and XLK?
VO has 255 positions not found in XLK, while XLK has 40 positions not found in VO. The largest fund-only positions and their weights are shown on this page.