IYW vs SPY: Holdings Overlap
IYWiShares U.S. Technology ETF
iShares · 139 holdings · $25.2B · as of 2026-04-30
SPYState Street® SPDR® S&P 500® ETF Trust
State Street (SPDR) · 504 holdings · $812.0B · as of 2026-08-06
Holdings snapshots are 98 days apart (IYW: 2026-04-30, SPY: 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 IYW and SPY?
iShares U.S. Technology ETF (IYW, by iShares) holds 139 positions; State Street® SPDR® S&P 500® ETF Trust (SPY, by State Street (SPDR)) holds 504. They have 65 holdings in common, and by portfolio weight the two funds are 41.9% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 41.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 65IYW holds 139 · SPY holds 504
- Weight in Shared Holdings
- IYW 95%·SPY 44%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 IYW
74 of 139 positions (4.5% of the fund) are not held by SPY. Showing the top 30 by weight.
Sector Breakdown
| Sector | IYW | SPY |
|---|---|---|
| Information Technology | 80.4% | 37.6% |
| Communication Services | 17.9% | 9.7% |
| Financials | 0.1% | 12.3% |
| Consumer Discretionary | 0.4% | 9.3% |
| Health Care | 0.0% | 8.9% |
| Other Sectors | 1.1% | 22.1% |
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 |
|---|---|---|---|---|---|---|---|
| IYW | +4.4% | +27.3% | +39.7% | +32.8% | +19.8% | +24.9% | 0.10% |
| SPY | +3.4% | +14.0% | +23.7% | +21.2% | +13.3% | +15.3% | 0.97% |
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 IYW vs SPY →
Shared Holdings(65)
The top 10 shared positions account for 79% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 16.23% | 8.00% | 8.00% |
|---|---|---|---|
 AAPLApple Inc. COM | 13.63% | 6.92% | 6.92% |
 MSFTMicrosoft Corp. COM | 3.99% | 5.60% | 3.99% |
 GOOGLAlphabet Inc. CAP STK CL A | 7.84% | 3.16% | 3.16% |
 AVGOBroadcom Inc COM | 3.78% | 3.00% | 3.00% |
 GOOGAlphabet Inc. CAP STK CL C | 6.33% | 2.54% | 2.54% |
 METAMeta Platforms, Inc., Class A | 2.80% | 1.95% | 1.95% |
 MUMicron Technology Inc. COM | 2.98% | 1.50% | 1.50% |
 AMDAdvanced Micro Devices Inc. COM | 3.50% | 1.20% | 1.20% |
 INTCIntel Corporation COM | 2.56% | 0.71% | 0.71% |
 AMATApplied Materials Inc. COM | 1.92% | 0.63% | 0.63% |
 LRCXLam Research Corporation COM NEW | 1.98% | 0.58% | 0.58% |
 PLTRPalantir Technologies, Inc., Class A | 1.86% | 0.54% | 0.54% |
 PANWPalo Alto Networks Inc COM | 0.88% | 0.44% | 0.44% |
 TXNTexas Instruments Inc. COM | 1.57% | 0.38% | 0.38% |
 KLACKLA Corp. COM NEW | 1.41% | 0.38% | 0.38% |
 ORCLOracle Corp. COM | 1.67% | 0.37% | 0.37% |
 IBMInternational Business Machines Corp. COM | 1.32% | 0.33% | 0.33% |
 CRWDCrowdstrike Holdings, Inc., Class A | 0.68% | 0.32% | 0.32% |
 APHAmphenol Corporation CL A | 1.10% | 0.32% | 0.32% |
 SNDKSandisk Corporation COM | 0.96% | 0.28% | 0.28% |
 MRVLMarvell Technology Inc COM | 0.86% | 0.28% | 0.28% |
 ADIAnalog Devices Inc. COM | 1.21% | 0.28% | 0.28% |
 QCOMQUALCOMM Inc. COM | 1.18% | 0.25% | 0.25% |
 WDCWestern Digital Corp. COM | 0.91% | 0.23% | 0.23% |
Frequently Asked Questions
How much do IYW and SPY overlap?
IYW and SPY overlap by 41.9% of portfolio weight. They share 65 holdings (IYW holds 139 positions and SPY holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IYW and SPY?
The two portfolios are 41.9% identical by weight. Owning both is defensible: they share a meaningful core, but each fund adds exposure the other lacks.
What are the biggest shared holdings of IYW and SPY?
The largest positions held by both funds are NVDA, AAPL, MSFT, GOOGL and AVGO. Together the top 10 shared positions account for 79% of the total overlap.
What does IYW own that SPY doesn't?
74 positions (4.5% of IYW) are unique to IYW, led by NET, MSTR and SNOW. In the other direction, 439 positions (56.4% of SPY) are unique to SPY.