IWR vs XLK Overlap
IWR is a mid-cap U.S. equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. IWR and XLK show limited overlap, with an estimated weighted overlap of 7.53%. They share 32 holdings in the loaded dataset, led by GLW, WDC, and SNDK.
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Quick Answer
IWR is a mid-cap U.S. equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. IWR and XLK show limited overlap, with an estimated weighted overlap of 7.53%. They share 32 holdings in the loaded dataset, led by GLW, WDC, and SNDK.
- 7.53% weighted overlap across 32 shared holdings.
- The top three shared holdings explain 29.35% of the measured overlap.
- IWR is the broader fund, while XLK is more targeted.
- The overlap is mostly explained by the top shared positions rather than sector labels alone.
- Holding both can still add materially different exposure.
Data Freshness
- IWR holdings
- Mar 12, 2026
- XLK holdings
- Mar 12, 2026
- Overlap computed
- Mar 15, 2026
- Data source
- Financial Modeling Prep
Review the methodology for the overlap formula and refresh policy.
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About These ETFs
What Stands Out In This Comparison
What This Means
IWR is a mid-cap U.S. equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. IWR and XLK do not own much of the same portfolio weight. That usually means you are combining different parts of the market, with only a small amount of duplication through names like GLW, WDC, and SNDK.
How They Differ
IWR is a mid-cap U.S. equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. IWR is the broader fund, while XLK is the more targeted sleeve. XLK has the lower expense ratio, while IWR charges more for its exposure.
What Drives The Overlap
The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 29.35% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.
When One May Fit Better
If you want the broader portfolio building block, IWR is usually the wider choice. If you want the more focused tilt, XLK is the narrower expression. XLK has the lower expense ratio, while IWR charges more for its exposure.
Overlap Driver Snapshot
Concentration
The top three shared holdings explain 29.35% of the full overlap score.
That helps show whether the score comes from a handful of giant shared positions or from a broader mix of common holdings.
Shared Sector Tilt
Sector tags are not consistently available for the biggest shared positions in this dataset, so this comparison leans more on the specific holdings than on sector labels.
Top Shared Holdings
These are the holdings contributing the most to the overlap score between IWR and XLK.
| Holding | Name | IWR Wt. | XLK Wt. | Overlap |
|---|---|---|---|---|
| GLW | CORNING INC | 0.83% | 0.94% | 0.83% |
| WDC | WESTERN DIGITAL CORP | 0.70% | 0.80% | 0.70% |
| SNDK | SANDISK CORP | 0.68% | 0.81% | 0.68% |
| KEYS | KEYSIGHT TECHNOLOGIES INC | 0.38% | 0.43% | 0.38% |
| MPWR | MONOLITHIC POWER SYSTEMS INC | 0.38% | 0.45% | 0.38% |
| TER | TERADYNE INC | 0.37% | 0.42% | 0.37% |
| DDOG | DATADOG INC CLASS A | 0.30% | 0.35% | 0.30% |
| MCHP | MICROCHIP TECHNOLOGY INC | 0.27% | 0.31% | 0.27% |
| CIEN | CIENA CORP | 0.37% | 0.24% | 0.24% |
| CTSH | COGNIZANT TECHNOLOGY SOLUTIONS COR | 0.24% | 0.27% | 0.24% |
Why These ETFs Overlap
IWR is a mid-cap U.S. equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are GLW, WDC, and SNDK, which appear in both portfolios and push the overlap score higher.
Holding both IWR and XLK can make sense if you want exposure to different sleeves of the market. The overlap is small enough that both funds may still improve diversification.
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Frequently Asked Questions About IWR and XLK
What is the overlap between IWR and XLK?+
How many holdings do IWR and XLK share?+
Is the IWR and XLK overlap high?+
Why do IWR and XLK overlap?+
Which ETF is broader, IWR or XLK?+
How Overlap Is Calculated
A straightforward approach used by portfolio analysts.
For every stock that appears in both ETFs, we take the smaller of the two weights. Adding up all those minimums gives the total overlap percentage. A score of 100% means the two ETFs hold the exact same stocks in the same proportions.
Want the full explanation? Read the methodology page.