IYW vs VOX overlap - what they share and where they differ
IYW and VOX share 17.2% of their weight across 8 common positions, read from what each fund reported to the SEC.
Each week Ploutos reads the reported positions of the largest US equity ETFs and measures, pair by pair, the weight they share: for every stock both funds hold, the smaller of the two weights counts. Two funds tracking the same index land near 100%. A sector fund inside a broad index fund lands at roughly that sector's weight.
IYW and VOX
17.2%
8 shared positions
IYW
iShares U.S. Technology ETF
Reported positions cover 100% of the fund, 135 positions · Apr 30, 2026
Top 10: 65.6%·Holdings of IYW
VOX
VANGUARD COMMUNICATION SERVICES INDEX FUND
Reported positions cover 100% of the fund, 103 positions · May 31, 2026
Top 10: 73.9%·Holdings of VOX
Reported positions cover IYW 100%, VOX 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
VOX vs IYW side by side
IYWiShares U.S. Technology ETF
135
stock positions reported to the SEC
82.7% of its weight is in 127 names VOX does not hold
VOXVANGUARD COMMUNICATION SERVICES INDEX FUND
103
stock positions reported to the SEC
49.5% of its weight is in 95 names IYW does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: IYW has 42.3 points more of it.
The figures side by side
| IYW | VOX | |
|---|---|---|
| Filing date | Apr 30, 2026 | May 31, 2026 |
| Stock positions reported | 135 | 103 |
| Weight of the ten largest | 65.6% | 73.9% |
| Largest position | NVDA 16.2% | GOOGL 26.7% |
| Held alone | 127 positions, 82.7% | 95 positions, 49.5% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IYW | In VOX | Counted |
|---|---|---|---|
| GOOGLALPHABET INC. | 14.17% | 26.66% | 14.17% |
| METAMETA PLATFORMS, INC. | 2.80% | 21.05% | 2.80% |
| RDDTREDDIT, INC. | 0.12% | 1.07% | 0.12% |
| PINSPINTEREST, INC. | 0.07% | 0.72% | 0.07% |
| MTCHMATCH GROUP, INC. | 0.05% | 0.49% | 0.05% |
| DJTTRUMP MEDIA & TECHNOLOGY GROUP CORP. | 0.01% | 0.09% | 0.01% |
| DVDOUBLEVERIFY HOLDINGS, INC. | 0.01% | 0.08% | 0.01% |
| GTMZOOMINFO TECHNOLOGIES INC. | 0.01% | 0.05% | 0.01% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IYW
Only in VOX
Questions people ask
Is IYW the same as VOX?
17.2% of their weight sits in the same 8 holdings. IYW also reports NVDA, AAPL, MSFT, which the other does not. VOX also reports NFLX, VZ, DIS, which the other does not.
How is the overlap between IYW and VOX measured?
For every stock both funds report, the smaller of the two weights counts, and the sum is the overlap. The reported positions cover 100% of IYW and 100% of VOX, so the number cannot exceed the smaller coverage.
Which holds more, VOX or IYW?
IYW reports 135 stock positions and VOX reports 103. 82.7% of IYW's weight sits in names VOX does not hold, and 49.5% of VOX's weight in names IYW does not hold. The ten largest positions are 65.6% of IYW and 73.9% of VOX.
How do IYW and VOX differ by sector?
The widest gap is Technology: IYW has 42.3 points more of it. Sectors come from each holding's SIC code in its SEC record, summed by the weight the fund reports.
Where do the numbers come from?
From each fund's own N-PORT filing to the SEC, which lists every position and its weight. The comparison uses every equity position the fund reports; cash, futures and bonds are not counted, which is why a coverage figure sits next to every result. Holdings change between filings.
Add a third fund in the tool·All fund pairs
Descriptive data from public SEC filings. Nothing on this page is a recommendation to buy, sell or hold any fund or stock, and holdings change between filings.