QTUM vs SOXX overlap - what they share and where they differ
QTUM and SOXX share 24.1% 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.
QTUM and SOXX
24.1%
20 shared positions
QTUM
Defiance Quantum ETF
Reported positions cover 99% of the fund, 86 positions · Jun 30, 2026
Top 10: 16.9%·Holdings of QTUM
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 QTUM 99%, 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 QTUM side by side
QTUMDefiance Quantum ETF
86
stock positions reported to the SEC
74.4% of its weight is in 66 names SOXX does not hold
SOXXiShares Semiconductor ETF
30
stock positions reported to the SEC
15.7% of its weight is in 10 names QTUM does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: SOXX has 33.0 points more of it.
The figures side by side
| QTUM | SOXX | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 86 | 30 |
| Weight of the ten largest | 16.9% | 61.6% |
| Largest position | ARQIT QUANTUM INC 2.4% | MU 8.5% |
| Held alone | 66 positions, 74.4% | 10 positions, 15.7% |
| Covered by stock positions | 99% | 100% |
Holdings they share
| Stock | In QTUM | In SOXX | Counted |
|---|---|---|---|
| ALABAstera Labs Inc | 1.55% | 3.02% | 1.55% |
| AMATApplied Materials Inc | 1.55% | 5.77% | 1.55% |
| KLACKLA Corp | 1.50% | 5.64% | 1.50% |
| TERTeradyne Inc | 1.48% | 3.36% | 1.48% |
| LRCXLam Research Corp | 1.43% | 4.89% | 1.43% |
| INTCIntel Corp | 1.39% | 6.33% | 1.39% |
| MUMicron Technology Inc | 1.37% | 8.54% | 1.37% |
| AMDAdvanced Micro Devices Inc | 1.36% | 8.09% | 1.36% |
| MRVLMarvell Technology Inc | 1.25% | 5.22% | 1.25% |
| ASMLASML Holding NV | 1.22% | 2.30% | 1.22% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in QTUM
Only in SOXX
Questions people ask
Is QTUM the same as SOXX?
24.1% of their weight sits in the same 20 holdings. QTUM also reports ARQIT QUANTUM INC, HQ, QNT, which the other does not. SOXX also reports TSM, MPWR, CRDO, which the other does not.
How is the overlap between QTUM 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 99% of QTUM and 100% of SOXX, so the number cannot exceed the smaller coverage.
Which holds more, SOXX or QTUM?
QTUM reports 86 stock positions and SOXX reports 30. 74.4% of QTUM's weight sits in names SOXX does not hold, and 15.7% of SOXX's weight in names QTUM does not hold. The ten largest positions are 16.9% of QTUM and 61.6% of SOXX.
How do QTUM and SOXX differ by sector?
The widest gap is Technology: SOXX has 33.0 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.