ARKX vs ONEQ overlap - what they share and where they differ
ARKX and ONEQ share 19.4% of their weight across 17 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.
ARKX and ONEQ
19.4%
17 shared positions
ARKX
ARK Space & Defense Innovation ETF
Reported positions cover 100% of the fund, 34 positions · Jul 31, 2026
Top 10: 54.5%·Holdings of ARKX
ONEQ
Fidelity Nasdaq Composite Index ETF
Reported positions cover 99% of the fund, 992 positions · May 31, 2026
Top 10: 59.6%·Holdings of ONEQ
Reported positions cover ARKX 100%, ONEQ 99% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
ONEQ vs ARKX side by side
ARKXARK Space & Defense Innovation ETF
34
stock positions reported to the SEC
43.9% of its weight is in 17 names ONEQ does not hold
ONEQFidelity Nasdaq Composite Index ETF
992
stock positions reported to the SEC
65.6% of its weight is in 975 names ARKX does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Industrials: ARKX has 43.6 points more of it.
The figures side by side
| ARKX | ONEQ | |
|---|---|---|
| Filing date | Jul 31, 2026 | May 31, 2026 |
| Stock positions reported | 34 | 992 |
| Weight of the ten largest | 54.5% | 59.6% |
| Largest position | SPCX 7.7% | NVDA 11.2% |
| Held alone | 17 positions, 43.9% | 975 positions, 65.6% |
| Covered by stock positions | 100% | 99% |
Holdings they share
| Stock | In ARKX | In ONEQ | Counted |
|---|---|---|---|
| AMZNAMAZON.COM INC | 4.90% | 6.33% | 4.90% |
| GOOGLALPHABET INC | 4.65% | 9.29% | 4.65% |
| NVDANVIDIA CORP | 3.39% | 11.18% | 3.39% |
| TSLATESLA INC | 3.04% | 3.56% | 3.04% |
| AMDADVANCED MICRO DEVICES INC | 4.93% | 1.83% | 1.83% |
| PLTRPALANTIR TECHNOLOGIES INC | 2.94% | 0.78% | 0.78% |
| SNPSSYNOPSYS INC | 0.97% | 0.20% | 0.20% |
| RKLBROCKET LAB CORP | 4.74% | 0.18% | 0.18% |
| DASHDOORDASH INC | 1.78% | 0.14% | 0.14% |
| TERTERADYNE INC | 3.96% | 0.13% | 0.13% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in ARKX
Only in ONEQ
Questions people ask
Is ARKX the same as ONEQ?
19.4% of their weight sits in the same 17 holdings. ARKX also reports SPCX, LHX, DE, which the other does not. ONEQ also reports AAPL, MSFT, AVGO, which the other does not.
How is the overlap between ARKX and ONEQ 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 ARKX and 99% of ONEQ, so the number cannot exceed the smaller coverage.
Which holds more, ONEQ or ARKX?
ARKX reports 34 stock positions and ONEQ reports 992. 43.9% of ARKX's weight sits in names ONEQ does not hold, and 65.6% of ONEQ's weight in names ARKX does not hold. The ten largest positions are 54.5% of ARKX and 59.6% of ONEQ.
How do ARKX and ONEQ differ by sector?
The widest gap is Industrials: ARKX has 43.6 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.