ARKX vs UFO overlap - what they share and where they differ
ARKX and UFO share 17.6% of their weight across 10 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 UFO
17.6%
10 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
UFO
Procure Space ETF
Reported positions cover 100% of the fund, 64 positions · Jul 31, 2026
Top 10: 48.4%·Holdings of UFO
Reported positions cover ARKX 100%, UFO 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
UFO vs ARKX side by side
ARKXARK Space & Defense Innovation ETF
34
stock positions reported to the SEC
74.2% of its weight is in 24 names UFO does not hold
UFOProcure Space ETF
64
stock positions reported to the SEC
65.6% of its weight is in 54 names ARKX does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Communication Services: UFO has 27.8 points more of it.
The figures side by side
| ARKX | UFO | |
|---|---|---|
| Filing date | Jul 31, 2026 | Jul 31, 2026 |
| Stock positions reported | 34 | 64 |
| Weight of the ten largest | 54.5% | 48.4% |
| Largest position | SPCX 7.7% | GRMN 7.0% |
| Held alone | 24 positions, 74.2% | 54 positions, 65.6% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In ARKX | In UFO | Counted |
|---|---|---|---|
| RKLBROCKET LAB CORP | 4.74% | 3.58% | 3.58% |
| TRMBTRIMBLE INC | 3.34% | 6.34% | 3.34% |
| LHXL3HARRIS TECHNOLOGIES INC | 7.53% | 2.54% | 2.54% |
| IRDMIRIDIUM COMMUNICATIONS INC | 1.81% | 3.65% | 1.81% |
| GRMNGARMIN LTD | 1.74% | 6.97% | 1.74% |
| LUNRINTUITIVE MACHINES INC | 1.72% | 1.33% | 1.33% |
| LMTLOCKHEED MARTIN CORP | 1.03% | 3.05% | 1.03% |
| AIRBUS SE | 1.02% | 3.17% | 1.02% |
| THALES SA | 2.12% | 0.63% | 0.63% |
| HONAHONEYWELL AEROSPACE INC | 0.54% | 2.79% | 0.54% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in ARKX
Only in UFO
Questions people ask
Is ARKX the same as UFO?
17.6% of their weight sits in the same 10 holdings. ARKX also reports SPCX, KTOS, DE, which the other does not. UFO also reports VSAT, SIRI, ECHO, which the other does not.
How is the overlap between ARKX and UFO 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 100% of UFO, so the number cannot exceed the smaller coverage.
Which holds more, UFO or ARKX?
ARKX reports 34 stock positions and UFO reports 64. 74.2% of ARKX's weight sits in names UFO does not hold, and 65.6% of UFO's weight in names ARKX does not hold. The ten largest positions are 54.5% of ARKX and 48.4% of UFO.
How do ARKX and UFO differ by sector?
The widest gap is Communication Services: UFO has 27.8 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.
Add a third fund in the tool·All fund pairs
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.