IGM vs QTUM overlap - what they share and where they differ
IGM and QTUM share 24.9% of their weight across 42 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 QTUM
24.9%
42 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
QTUM
Defiance Quantum ETF
Reported positions cover 99% of the fund, 86 positions · Jun 30, 2026
Top 10: 16.9%·Holdings of QTUM
Reported positions cover IGM 100%, QTUM 99% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
QTUM vs IGM side by side
IGMiShares Expanded Tech Sector ETF
273
stock positions reported to the SEC
36.1% of its weight is in 231 names QTUM does not hold
QTUMDefiance Quantum ETF
86
stock positions reported to the SEC
50.7% of its weight is in 44 names IGM does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: IGM has 34.1 points more of it.
The figures side by side
| IGM | QTUM | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 273 | 86 |
| Weight of the ten largest | 58.1% | 16.9% |
| Largest position | GOOGL 8.0% | ARQIT QUANTUM INC 2.4% |
| Held alone | 231 positions, 36.1% | 44 positions, 50.7% |
| Covered by stock positions | 100% | 99% |
Holdings they share
| Stock | In IGM | In QTUM | Counted |
|---|---|---|---|
| AMATApplied Materials, Inc. | 2.50% | 1.55% | 1.55% |
| KLACKLA Corp. | 1.72% | 1.50% | 1.50% |
| LRCXLam Research Corp. | 2.36% | 1.43% | 1.43% |
| INTCIntel Corp. | 2.87% | 1.39% | 1.39% |
| MUMicron Technology, Inc. | 5.46% | 1.37% | 1.37% |
| AMDAdvanced Micro Devices, Inc. | 4.13% | 1.36% | 1.36% |
| MRVLMarvell Technology, Inc. | 1.14% | 1.25% | 1.14% |
| TXNTexas Instruments, Inc. | 1.18% | 1.12% | 1.12% |
| IBMInternational Business Machines Corp. | 1.15% | 1.10% | 1.10% |
| AVGOBroadcom, Inc. | 7.60% | 1.08% | 1.08% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IGM
Only in QTUM
Questions people ask
Is IGM the same as QTUM?
24.9% of their weight sits in the same 42 holdings. IGM also reports AAPL, META, SNDK, which the other does not. QTUM also reports ARQIT QUANTUM INC, HQ, QNT, which the other does not.
How is the overlap between IGM and QTUM 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 99% of QTUM, so the number cannot exceed the smaller coverage.
Which holds more, QTUM or IGM?
IGM reports 273 stock positions and QTUM reports 86. 36.1% of IGM's weight sits in names QTUM does not hold, and 50.7% of QTUM's weight in names IGM does not hold. The ten largest positions are 58.1% of IGM and 16.9% of QTUM.
How do IGM and QTUM differ by sector?
The widest gap is Technology: IGM has 34.1 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.