IYW vs SMH overlap - what they share and where they differ
IYW and SMH share 41.9% of their weight across 20 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 SMH
41.9%
20 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
SMH
VanEck Semiconductor ETF
Reported positions cover 100% of the fund, 25 positions · Jun 30, 2026
Top 10: 70.2%·Holdings of SMH
Reported positions cover IYW 100%, SMH 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
SMH vs IYW side by side
IYWiShares U.S. Technology ETF
135
stock positions reported to the SEC
58.1% of its weight is in 115 names SMH does not hold
SMHVanEck Semiconductor ETF
25
stock positions reported to the SEC
17.9% of its weight is in 5 names IYW does not hold
Where each fund's weight sits
Largest sectors for both funds
No sector differs by more than a point between the two.
The figures side by side
| IYW | SMH | |
|---|---|---|
| Filing date | Apr 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 135 | 25 |
| Weight of the ten largest | 65.6% | 70.2% |
| Largest position | NVDA 16.2% | NVDA 17.6% |
| Held alone | 115 positions, 58.1% | 5 positions, 17.9% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IYW | In SMH | Counted |
|---|---|---|---|
| NVDANVIDIA CORPORATION | 16.23% | 17.55% | 16.23% |
| AVGOBROADCOM INC. | 3.78% | 5.28% | 3.78% |
| AMDADVANCED MICRO DEVICES, INC. | 3.50% | 5.63% | 3.50% |
| MUMICRON TECHNOLOGY, INC. | 2.98% | 5.67% | 2.98% |
| INTCINTEL CORPORATION | 2.56% | 5.15% | 2.56% |
| LRCXLAM RESEARCH CORPORATION | 1.98% | 5.31% | 1.98% |
| AMATAPPLIED MATERIALS, INC. | 1.92% | 5.74% | 1.92% |
| TXNTEXAS INSTRUMENTS INCORPORATED | 1.57% | 4.17% | 1.57% |
| KLACKLA CORPORATION | 1.41% | 5.57% | 1.41% |
| ADIANALOG DEVICES, INC. | 1.21% | 4.00% | 1.21% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IYW
Only in SMH
Questions people ask
Is IYW the same as SMH?
41.9% of their weight sits in the same 20 holdings. IYW also reports GOOGL, AAPL, MSFT, which the other does not. SMH also reports TSM, ASML, STM, which the other does not.
How is the overlap between IYW and SMH 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 SMH, so the number cannot exceed the smaller coverage.
Which holds more, SMH or IYW?
IYW reports 135 stock positions and SMH reports 25. 58.1% of IYW's weight sits in names SMH does not hold, and 17.9% of SMH's weight in names IYW does not hold. The ten largest positions are 65.6% of IYW and 70.2% of SMH.
How do IYW and SMH differ by sector?
No sector differs by more than a point between the two. 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.
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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.