iShares U.S. Technology ETF (IYW) and Vanguard S&P 500 ETF (VOO) share 66 holdings, with roughly 44.1% of their portfolio weight overlapping.
Holdings as of: IYW October 29, 2026 · VOO September 30, 2026.
Fund pages: IYW (iShares U.S. Technology ETF) · VOO (Vanguard S&P 500 ETF)
Weight overlap
44.1%
Shared portfolio weight
Shared holdings
66
Securities in both funds
Funds
IYW · VOO
Compared side by side
Interactive charts, sector exposure, combined allocation, and the full overlap heatmap.
Every holding both funds own, ranked by shared exposure (how much of the position they hold in common). The weight gap shows which fund tilts more heavily into it.
| Holding | In IYW | In VOO | Weight gap |
|---|---|---|---|
| NVDANVIDIA | 16.65% | 8.39% | 8.26%IYW |
| AAPLAPPLE | 16.86% | 7.38% | 9.48%IYW |
| MSFTMICROSOFT | 13.17% | 5.78% | 7.39%IYW |
| AVGOBROADCOM | 3.20% | 2.54% | 0.66%IYW |
| METAMETA PLATFORMS | 3.08% | 2.43% | 0.65%IYW |
| GOOGLALPHABET | 2.13% | 3.07% | 0.94%VOO |
| MUMICRON TECHNOLOGY | 2.77% | 1.83% | 0.95%IYW |
| GOOGALPHABET CL C | 1.73% | 2.45% | 0.73%VOO |
| AMDADVANCED MICRO DEVICES | 3.11% | 1.52% | 1.59%IYW |
| INTCINTEL | 2.10% | 0.91% | 1.19%IYW |
| PLTRPALANTIR TECHNOLOGIES A | 2.18% | 0.65% | 1.52%IYW |
| LRCXLAM RESEARCH | 1.59% | 0.62% | 0.96%IYW |
| AMATAPPLIED MATERIALS | 1.67% | 0.62% | 1.05%IYW |
| PANWPALO ALTO NETWORKS | 1.53% | 0.49% | 1.04%IYW |
| CRWDCROWDSTRIKE HOLDINGS | 1.31% | 0.41% | 0.90%IYW |
| TXNTEXAS INSTRUMENTS | 1.42% | 0.39% | 1.03%IYW |
| KLACKLA | 1.09% | 0.39% | 0.71%IYW |
| SNDKSANDISK | 0.97% | 0.39% | 0.58%IYW |
| ORCLORACLE | 1.19% | 0.36% | 0.83%IYW |
| MRVLMARVELL TECHNOLOGY | 0.95% | 0.35% | 0.60%IYW |
| APHAMPHENOL | 1.01% | 0.32% | 0.69%IYW |
| IBMINTERNATIONAL BUSINESS MACHINES | 1.21% | 0.31% | 0.90%IYW |
| QCOMQUALCOMM | 0.98% | 0.30% | 0.68%IYW |
| ADIANALOG DEVICES | 1.06% | 0.29% | 0.76%IYW |
| CRMSALESFORCE | 0.92% | 0.29% | 0.63%IYW |
| WDCWESTERN DIGITAL | 0.68% | 0.25% | 0.43%IYW |
| DELL | 0.71% | 0.25% | 0.47%IYW |
| NOWSERVICENOW | 0.56% | 0.21% | 0.35%IYW |
| GLWCORNING | 0.51% | 0.18% | 0.32%IYW |
| FTNTFORTINET | 0.42% | 0.17% | 0.25%IYW |
| ADBEADOBE | 0.49% | 0.14% | 0.35%IYW |
| DDOGDATADOG CLASS A | 0.44% | 0.14% | 0.30%IYW |
| CDNSCADENCE DESIGN SYS | 0.47% | 0.14% | 0.33%IYW |
| HPEHEWLETT PACKARD ENTERPRISE | 0.39% | 0.13% | 0.26%IYW |
| SNPSSYNOPSYS | 0.46% | 0.13% | 0.33%IYW |
| APPAPPLOVIN | 0.31% | 0.12% | 0.19%IYW |
| INTUINTUIT | 0.44% | 0.11% | 0.33%IYW |
| DASHDOORDASH A | 0.34% | 0.10% | 0.23%IYW |
| MPWRMONOLITHIC POWER SYSTEMS | 0.28% | 0.10% | 0.18%IYW |
| TERTERADYNE | 0.23% | 0.10% | 0.14%IYW |
| COHRCOHERENT | 0.22% | 0.09% | 0.14%IYW |
| ADSKAUTODESK | 0.25% | 0.07% | 0.19%IYW |
| PPure Storage Class A | 0.21% | 0.07% | 0.15%IYW |
| MCHPMICROCHIP TECHNOLOGY | 0.21% | 0.06% | 0.15%IYW |
| NTAPNETAPP | 0.21% | 0.06% | 0.15%IYW |
| FLEXFLEX LTD | 0.17% | 0.06% | 0.11%IYW |
| WDAYWORKDAY | 0.19% | 0.06% | 0.13%IYW |
| ROPROPER TECHNOLOGIES | 0.22% | 0.05% | 0.17%IYW |
| JBLJABIL | 0.15% | 0.05% | 0.10%IYW |
| ONON SEMICONDUCTOR | 0.15% | 0.05% | 0.10%IYW |
| HPQHP | 0.15% | 0.04% | 0.10%IYW |
| QQNITY ELECTRONICS | 0.13% | 0.04% | 0.09%IYW |
| CTSHCOGNIZANT TECH SOLUTIONS A | 0.14% | 0.04% | 0.10%IYW |
| FFIVF5 | 0.10% | 0.04% | 0.06%IYW |
| SMCISUPER MICRO COMPUTER | 0.10% | 0.04% | 0.06%IYW |
| VRSNVERISIGN | 0.12% | 0.03% | 0.09%IYW |
| RDDTReddit Class A | 0.09% | 0.03% | 0.06%IYW |
| CDWCDW CORP/DE | 0.11% | 0.02% | 0.08%IYW |
| LDOSLEIDOS | 0.09% | 0.02% | 0.06%IYW |
| AKAMAKAMAI TECHNOLOGIES | 0.07% | 0.02% | 0.05%IYW |
| PTC | 0.11% | 0.02% | 0.08%IYW |
| SWKSSKYWORKS SOLUTIONS | 0.10% | 0.02% | 0.08%IYW |
| TYLTYLER TECHNOLOGIES | 0.08% | 0.02% | 0.06%IYW |
| GDDYGODADDY CLASS A | 0.07% | 0.02% | 0.05%IYW |
| GENGEN DIGITAL | 0.08% | 0.02% | 0.06%IYW |
| ITGARTNER | 0.07% | 0.02% | 0.06%IYW |
1–20 of 66
How each fund's equity holdings break down by sector, side by side — the clearest read on where the two funds tilt differently.
| Sector | In IYW | In VOO |
|---|---|---|
Technology | 92.0% | 40.4% |
Communication Services | 7.4% | 10.0% |
Financial Services | 0.1% | 11.1% |
Healthcare | 0.0% | 9.3% |
Consumer Cyclical | 0.4% | 8.8% |
Industrials | 0.1% | 7.5% |
Consumer Defensive | 0.0% | 4.3% |
Energy | 0.0% | 3.4% |
Utilities | 0.0% | 1.9% |
Real Estate | 0.0% | 1.7% |
Basic Materials | 0.0% | 1.6% |
Weights are of each fund’s classified equity holdings.
IYW
VOO
Two ETFs overlap when they hold the same underlying securities. Holding both funds can leave you more concentrated than you think — you may own the same large companies twice, at a combined weight neither fund shows on its own. The weight overlap above is the share of portfolio weight the two funds hold in common: for every security both own, it counts only the smaller of the two weights (the slice you genuinely double up on). 0% means completely different books; 100% means effectively identical funds.