IYW vs VOO: Holdings Overlap
IYWiShares U.S. Technology ETF
iShares · 139 holdings · $25.2B · as of 2026-04-30
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
Holdings snapshots are 30 days apart (IYW: 2026-04-30, VOO: 2026-03-31). 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 VOO?
iShares U.S. Technology ETF (IYW, by iShares) holds 139 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 64 holdings in common, and by portfolio weight the two funds are 38.0% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 38.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 64IYW holds 139 · VOO holds 504
- Weight in Shared Holdings
- IYW 94%·VOO 39%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
75 of 139 positions (5.6% of the fund) are not held by VOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IYW | VOO |
|---|---|---|
| Information Technology | 80.4% | 32.7% |
| Communication Services | 17.9% | 10.5% |
| Financials | 0.1% | 12.4% |
| Consumer Discretionary | 0.4% | 9.9% |
| Health Care | 0.0% | 9.5% |
| Other Sectors | 1.1% | 24.9% |
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% |
| VOO | +3.4% | +14.0% | +23.7% | +21.3% | +13.4% | +15.4% | 1.03% |
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 VOO →
Shared Holdings(64)
The top 10 shared positions account for 80% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 16.23% | 7.58% | 7.58% |
|---|---|---|---|
 AAPLApple Inc. COM | 13.63% | 6.66% | 6.66% |
 MSFTMicrosoft Corp. COM | 3.99% | 4.91% | 3.99% |
 GOOGLAlphabet Inc. CAP STK CL A | 7.84% | 2.99% | 2.99% |
 AVGOBroadcom Inc COM | 3.78% | 2.62% | 2.62% |
 GOOGAlphabet Inc. CAP STK CL C | 6.33% | 2.40% | 2.40% |
 METAMeta Platforms, Inc., Class A | 2.80% | 2.24% | 2.24% |
 MUMicron Technology Inc. COM | 2.98% | 0.68% | 0.68% |
 PLTRPalantir Technologies, Inc., Class A | 1.86% | 0.60% | 0.60% |
 AMDAdvanced Micro Devices Inc. COM | 3.50% | 0.59% | 0.59% |
 AMATApplied Materials Inc. COM | 1.92% | 0.48% | 0.48% |
 LRCXLam Research Corporation COM NEW | 1.98% | 0.48% | 0.48% |
 ORCLOracle Corp. COM | 1.67% | 0.45% | 0.45% |
 IBMInternational Business Machines Corp. COM | 1.32% | 0.41% | 0.41% |
 INTCIntel Corporation COM | 2.56% | 0.37% | 0.37% |
 KLACKLA Corp. COM NEW | 1.41% | 0.35% | 0.35% |
 TXNTexas Instruments Inc. COM | 1.57% | 0.32% | 0.32% |
 CRMSalesforce Inc. COM | 0.99% | 0.31% | 0.31% |
 ADIAnalog Devices Inc. COM | 1.21% | 0.28% | 0.28% |
 APHAmphenol Corporation CL A | 1.10% | 0.28% | 0.28% |
 QCOMQUALCOMM Inc. COM | 1.18% | 0.25% | 0.25% |
 PANWPalo Alto Networks Inc COM | 0.88% | 0.23% | 0.23% |
 INTUIntuit Inc COM | 0.65% | 0.22% | 0.22% |
 NOWServicenow Inc COM | 0.57% | 0.20% | 0.20% |
 APPAppLovin Corp., Class A | 0.65% | 0.19% | 0.19% |
Frequently Asked Questions
How much do IYW and VOO overlap?
IYW and VOO overlap by 38.0% of portfolio weight. They share 64 holdings (IYW holds 139 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IYW and VOO?
The two portfolios are 38.0% 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 VOO?
The largest positions held by both funds are NVDA, AAPL, MSFT, GOOGL and AVGO. Together the top 10 shared positions account for 80% of the total overlap.
What does IYW own that VOO doesn't?
75 positions (5.6% of IYW) are unique to IYW, led by MRVL, NET and MSTR. In the other direction, 440 positions (60.9% of VOO) are unique to VOO.