IYZ vs XLK: Holdings Overlap
IYZiShares U.S. Telecommunications ETF
iShares · 21 holdings · $1.3B · as of 2026-03-31
XLKState Street® Technology Select Sector SPDR® ETF
State Street (SPDR) · 73 holdings · $122.8B · as of 2026-08-06
Holdings snapshots are 128 days apart (IYZ: 2026-03-31, XLK: 2026-08-06). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are IYZ and XLK?
iShares U.S. Telecommunications ETF (IYZ, by iShares) holds 21 positions; State Street® Technology Select Sector SPDR® ETF (XLK, by State Street (SPDR)) holds 73. They have 5 holdings in common, and by portfolio weight the two funds are 5.8% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 5.8%Sum of the smaller weight of each shared holding
- Shared Holdings
- 5IYZ holds 21 · XLK holds 73
- Weight in Shared Holdings
- IYZ 35%·XLK 6%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in IYZ
16 of 21 positions (64.9% of the fund) are not held by XLK.
Sector Breakdown
| Sector | IYZ | XLK |
|---|---|---|
| Information Technology | 38.4% | 99.9% |
| Communication Services | 61.4% | 0.0% |
| Other Sectors | 0.0% | 0.0% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IYZ | +7.6% | +29.6% | +46.8% | +27.9% | +7.6% | +5.2% | 1.61% |
| XLK | +4.9% | +30.9% | +43.5% | +30.7% | +20.3% | +24.4% | 0.42% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in IYZ vs XLK →
Shared Holdings(5)
The top 5 shared positions account for 100% of the overlap, led by CSCO, ANET and MSI.
 CSCOCisco Systems, Inc. COM | 19.13% | 3.15% | 3.15% |
|---|---|---|---|
 ANETArista Networks Inc COM SHS | 3.98% | 1.31% | 1.31% |
 MSIMotorola Solutions Inc COM NEW | 3.71% | 0.52% | 0.52% |
 LITELumentum Holdings Inc. COM | 3.88% | 0.43% | 0.43% |
 CIENCiena Corporation COM NEW | 4.25% | 0.38% | 0.38% |
Frequently Asked Questions
How much do IYZ and XLK overlap?
IYZ and XLK overlap by 5.8% of portfolio weight. They share 5 holdings (IYZ holds 21 positions and XLK holds 73), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IYZ and XLK?
The two portfolios are 5.8% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of IYZ and XLK?
The largest positions held by both funds are CSCO, ANET, MSI, LITE and CIEN. Together the top 5 shared positions account for 100% of the total overlap.
What does IYZ own that XLK doesn't?
16 positions (64.9% of IYZ) are unique to IYZ, led by VZ, T and TMUS. In the other direction, 68 positions (94.1% of XLK) are unique to XLK.