iShares U.S. Technology ETF (IYW) and Vanguard S&P 500 ETF (VOO) share 65 holdings, with roughly 42.6% of their portfolio weight overlapping.
Weight overlap
42.6%
Shared portfolio weight
Shared holdings
65
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 | 14.11% | 7.55% | 6.56%IYW |
| AAPLApple | 13.21% | 7.04% | 6.17%IYW |
| MSFTMicrosoft | 10.76% | 5.36% | 5.40%IYW |
| GOOGLAlphabet | 5.48% | 3.24% | 2.24%IYW |
| AVGOBROADCOM | 4.07% | 2.86% | 1.21%IYW |
| GOOGALPHABET CL C | 4.44% | 2.62% | 1.82%IYW |
| METAMETA PLATFORMS CLASS A | 4.17% | 1.90% | 2.27%IYW |
| MUMICRON TECHNOLOGY | 3.35% | 1.44% | 1.91%IYW |
| AMDADVANCED MICRO DEVICES | 3.08% | 1.21% | 1.87%IYW |
| INTCINTEL | 2.27% | 0.66% | 1.61%IYW |
| AMATAPPLIED MATERIALS | 1.78% | 0.63% | 1.15%IYW |
| LRCXLAM RESEARCH | 1.85% | 0.57% | 1.28%IYW |
| PLTRPALANTIR TECHNOLOGIES A | 1.83% | 0.44% | 1.39%IYW |
| PANWPALO ALTO NETWORKS | 1.35% | 0.42% | 0.93%IYW |
| TXNTEXAS INSTRUMENTS | 1.17% | 0.39% | 0.78%IYW |
| KLACKLA | 1.15% | 0.37% | 0.78%IYW |
| ORCLORACLE | 1.30% | 0.34% | 0.96%IYW |
| IBMInternational Business Machines | 1.09% | 0.33% | 0.76%IYW |
| APHAMPHENOL CL A | 0.98% | 0.31% | 0.67%IYW |
| CRWDCROWDSTRIKE HOLDINGS A | 1.04% | 0.30% | 0.74%IYW |
| WDCWESTERN DIGITAL | 0.77% | 0.29% | 0.48%IYW |
| ADIANALOG DEVICES | 0.87% | 0.28% | 0.59%IYW |
| SNDKSANDISK | 1.22% | 0.28% | 0.94%IYW |
| MRVLMARVELL TECHNOLOGY | 0.98% | 0.25% | 0.73%IYW |
| QCOMQUALCOMM | 0.92% | 0.24% | 0.68%IYW |
| CRMSALESFORCE | 0.96% | 0.23% | 0.73%IYW |
| DELLDELL TECHNOLOGIES C | 0.76% | 0.18% | 0.58%IYW |
| NOWSERVICENOW | 0.67% | 0.18% | 0.49%IYW |
| APPAPPLOVIN CLASS A | 0.37% | 0.17% | 0.20%IYW |
| GLWCORNING | 0.64% | 0.17% | 0.47%IYW |
| ADBEADOBE | 0.50% | 0.16% | 0.34%IYW |
| FTNTFORTINET | 0.48% | 0.16% | 0.32%IYW |
| CDNSCADENCE DESIGN SYS | 0.39% | 0.15% | 0.24%IYW |
| DDOGDATADOG CLASS A | 0.36% | 0.14% | 0.22%IYW |
| INTUINTUIT | 0.42% | 0.14% | 0.28%IYW |
| VRTVERTIV HOLDINGS A | 0.47% | 0.14% | 0.33%IYW |
| DASHDOORDASH A | 0.37% | 0.12% | 0.25%IYW |
| SNPSSYNOPSYS | 0.37% | 0.12% | 0.25%IYW |
| MPWRMONOLITHIC POWER SYSTEMS | 0.28% | 0.11% | 0.17%IYW |
| HPEHEWLETT PACKARD ENTERPRISE | 0.36% | 0.10% | 0.26%IYW |
| TERTERADYNE | 0.29% | 0.09% | 0.20%IYW |
| ADSKAUTODESK | 0.22% | 0.08% | 0.14%IYW |
| COHRCOHERENT | 0.26% | 0.08% | 0.18%IYW |
| FLEXFLEX LTD | 0.20% | 0.07% | 0.13%IYW |
| MCHPMICROCHIP TECHNOLOGY | 0.19% | 0.06% | 0.13%IYW |
| ROPROPER TECHNOLOGIES | 0.20% | 0.06% | 0.14%IYW |
| JBLJABIL | 0.16% | 0.05% | 0.11%IYW |
| NTAPNETAPP | 0.18% | 0.05% | 0.13%IYW |
| ONON SEMICONDUCTOR | 0.14% | 0.05% | 0.09%IYW |
| WDAYWORKDAY CLASS A | 0.19% | 0.05% | 0.14%IYW |
| CTSHCOGNIZANT TECH SOLUTIONS A | 0.14% | 0.04% | 0.10%IYW |
| FFIVF5 | 0.11% | 0.04% | 0.07%IYW |
| HPQHP | 0.15% | 0.04% | 0.11%IYW |
| QQNITY ELECTRONICS | 0.13% | 0.04% | 0.09%IYW |
| VRSNVERISIGN | 0.12% | 0.04% | 0.08%IYW |
| AKAMAKAMAI TECHNOLOGIES | 0.08% | 0.03% | 0.05%IYW |
| CDWCDW CORP/DE | 0.09% | 0.03% | 0.06%IYW |
| GDDYGODADDY CLASS A | 0.06% | 0.02% | 0.04%IYW |
| GENGEN DIGITAL | 0.08% | 0.02% | 0.06%IYW |
| ITGARTNER | 0.06% | 0.02% | 0.04%IYW |
| LDOSLEIDOS HOLDINGS | 0.08% | 0.02% | 0.06%IYW |
| PTC | 0.08% | 0.02% | 0.06%IYW |
| SMCISUPER MICRO COMPUTER | 0.10% | 0.02% | 0.08%IYW |
| TYLTYLER TECHNOLOGIES | 0.07% | 0.02% | 0.05%IYW |
| SWKSSKYWORKS SOLUTIONS | 0.06% | 0.01% | 0.05%IYW |
1–20 of 65
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 | 84.1% | 37.4% |
Communication Services | 14.7% | 9.9% |
Financial Services | 0.2% | 12.2% |
Consumer Cyclical | 0.4% | 9.6% |
Healthcare | 0.0% | 9.1% |
Industrials | 0.6% | 8.1% |
Consumer Defensive | 0.0% | 4.6% |
Energy | 0.0% | 3.3% |
Utilities | 0.0% | 2.1% |
Real Estate | 0.0% | 1.9% |
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.