IGM vs SOXX overlap - what they share and where they differ
IGM and SOXX share 38.1% of their weight across 23 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.
IGM and SOXX
38.1%
23 shared positions
IGM
iShares Expanded Tech Sector ETF
Reported positions cover 100% of the fund, 273 positions · Jun 30, 2026
Top 10: 58.1%·Holdings of IGM
SOXX
iShares Semiconductor ETF
Reported positions cover 100% of the fund, 30 positions · Jun 30, 2026
Top 10: 61.6%·Holdings of SOXX
Reported positions cover IGM 100%, SOXX 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
SOXX vs IGM side by side
IGMiShares Expanded Tech Sector ETF
273
stock positions reported to the SEC
59.2% of its weight is in 250 names SOXX does not hold
SOXXiShares Semiconductor ETF
30
stock positions reported to the SEC
11.2% of its weight is in 7 names IGM does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Healthcare: SOXX has 2.2 points more of it.
The figures side by side
| IGM | SOXX | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 273 | 30 |
| Weight of the ten largest | 58.1% | 61.6% |
| Largest position | GOOGL 8.0% | MU 8.5% |
| Held alone | 250 positions, 59.2% | 7 positions, 11.2% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IGM | In SOXX | Counted |
|---|---|---|---|
| NVDANVIDIA Corp. | 7.96% | 6.81% | 6.81% |
| AVGOBroadcom, Inc. | 7.60% | 6.08% | 6.08% |
| MUMicron Technology, Inc. | 5.46% | 8.54% | 5.46% |
| AMDAdvanced Micro Devices, Inc. | 4.13% | 8.09% | 4.13% |
| INTCIntel Corp. | 2.87% | 6.33% | 2.87% |
| AMATApplied Materials, Inc. | 2.50% | 5.77% | 2.50% |
| LRCXLam Research Corp. | 2.36% | 4.89% | 2.36% |
| KLACKLA Corp. | 1.72% | 5.64% | 1.72% |
| TXNTexas Instruments, Inc. | 1.18% | 3.50% | 1.18% |
| MRVLMarvell Technology, Inc. | 1.14% | 5.22% | 1.14% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IGM
Only in SOXX
Questions people ask
Is IGM the same as SOXX?
38.1% of their weight sits in the same 23 holdings. IGM also reports GOOGL, AAPL, MSFT, which the other does not. SOXX also reports TSM, ASML, ASX, which the other does not.
How is the overlap between IGM and SOXX 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 IGM and 100% of SOXX, so the number cannot exceed the smaller coverage.
Which holds more, SOXX or IGM?
IGM reports 273 stock positions and SOXX reports 30. 59.2% of IGM's weight sits in names SOXX does not hold, and 11.2% of SOXX's weight in names IGM does not hold. The ten largest positions are 58.1% of IGM and 61.6% of SOXX.
How do IGM and SOXX differ by sector?
The widest gap is Healthcare: SOXX has 2.2 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.
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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.