SOXX vs XLK Overlap
SOXX is a semiconductor-focused equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. SOXX and XLK show meaningful overlap, with an estimated weighted overlap of 33.74%. They share 16 holdings in the loaded dataset, led by NVDA, AVGO, and MU.
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Quick Answer
SOXX is a semiconductor-focused equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. SOXX and XLK show meaningful overlap, with an estimated weighted overlap of 33.74%. They share 16 holdings in the loaded dataset, led by NVDA, AVGO, and MU.
- 33.74% weighted overlap across 16 shared holdings.
- The top three shared holdings explain 49.64% of the measured overlap.
- SOXX and XLK are closer in breadth than a broad-vs-niche ETF pair.
- The overlap is mostly explained by the top shared positions rather than sector labels alone.
- Holding both may add less diversification than the fund names imply.
Data Freshness
- SOXX 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
SOXX is a semiconductor-focused equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. SOXX and XLK overlap enough to matter, but they still bring different exposures to a portfolio. The overlap is concentrated in holdings such as NVDA, AVGO, and MU, which explains why the score lands at 33.74%.
How They Differ
SOXX is a semiconductor-focused equity ETF from IShares, while XLK is a technology-focused equity ETF from SPDR. Neither fund clearly dominates on breadth, so the practical difference is more about weighting, index construction, and cost. XLK has the lower expense ratio, while SOXX 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 49.64% 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
Because SOXX and XLK are closer in breadth, the better fit usually comes down to index methodology, issuer preference, and cost. XLK has the lower expense ratio, while SOXX charges more for its exposure.
Overlap Driver Snapshot
Concentration
The top three shared holdings explain 49.64% 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 SOXX and XLK.
| Holding | Name | SOXX Wt. | XLK Wt. | Overlap |
|---|---|---|---|---|
| NVDA | NVIDIA CORP | 7.28% | 15.20% | 7.28% |
| AVGO | BROADCOM INC | 5.92% | 5.48% | 5.48% |
| MU | MICRON TECHNOLOGY INC | 8.75% | 4.00% | 4.00% |
| AMD | ADVANCED MICRO DEVICES INC | 6.51% | 2.92% | 2.92% |
| AMAT | APPLIED MATERIAL INC | 7.04% | 2.43% | 2.43% |
| LRCX | LAM RESEARCH CORP | 4.81% | 2.39% | 2.39% |
| INTC | INTEL CORPORATION CORP | 4.02% | 1.85% | 1.85% |
| KLAC | KLA CORP | 4.31% | 1.69% | 1.69% |
| TXN | TEXAS INSTRUMENT INC | 4.09% | 1.58% | 1.58% |
| ADI | ANALOG DEVICES INC | 4.19% | 1.39% | 1.39% |
Why These ETFs Overlap
SOXX is a semiconductor-focused 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 NVDA, AVGO, and MU, which appear in both portfolios and push the overlap score higher.
Holding both SOXX and XLK can still be reasonable, but you should expect some duplication. The decision comes down to whether the non-overlapping parts of each ETF are important enough for your strategy.
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Frequently Asked Questions About SOXX and XLK
What is the overlap between SOXX and XLK?+
How many holdings do SOXX and XLK share?+
Is the SOXX and XLK overlap high?+
Why do SOXX and XLK overlap?+
Which ETF is broader, SOXX 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.