ARKX vs MGK overlap - what they share and where they differ
ARKX and MGK share 20.6% of their weight across 8 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 MGK
20.6%
8 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
MGK
VANGUARD MEGA CAP GROWTH INDEX FUND
Reported positions cover 100% of the fund, 55 positions · Jun 30, 2026
Top 10: 66.8%·Holdings of MGK
Reported positions cover ARKX 100%, MGK 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
MGK vs ARKX side by side
ARKXARK Space & Defense Innovation ETF
34
stock positions reported to the SEC
67.3% of its weight is in 26 names MGK does not hold
MGKVANGUARD MEGA CAP GROWTH INDEX FUND
55
stock positions reported to the SEC
62.5% of its weight is in 47 names ARKX does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: MGK has 43.6 points more of it.
The figures side by side
| ARKX | MGK | |
|---|---|---|
| Filing date | Jul 31, 2026 | Jun 30, 2026 |
| Stock positions reported | 34 | 55 |
| Weight of the ten largest | 54.5% | 66.8% |
| Largest position | SPCX 7.7% | NVDA 13.3% |
| Held alone | 26 positions, 67.3% | 47 positions, 62.5% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In ARKX | In MGK | Counted |
|---|---|---|---|
| GOOGLALPHABET INC | 4.65% | 10.58% | 4.65% |
| AMZNAMAZON.COM INC | 4.90% | 4.46% | 4.46% |
| NVDANVIDIA CORP | 3.39% | 13.27% | 3.39% |
| AMDADVANCED MICRO DEVICES INC | 4.93% | 3.19% | 3.19% |
| TSLATESLA INC | 3.04% | 3.93% | 3.04% |
| PLTRPALANTIR TECHNOLOGIES INC | 2.94% | 0.97% | 0.97% |
| SPCXSPACE EXPLORATION TECHNOLOGIES CORP | 7.67% | 0.48% | 0.48% |
| SNPSSYNOPSYS INC | 0.97% | 0.45% | 0.45% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in ARKX
Only in MGK
Questions people ask
Is ARKX the same as MGK?
20.6% of their weight sits in the same 8 holdings. ARKX also reports LHX, KTOS, DE, which the other does not. MGK also reports AAPL, MSFT, AVGO, which the other does not.
How is the overlap between ARKX and MGK 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 MGK, so the number cannot exceed the smaller coverage.
Which holds more, MGK or ARKX?
ARKX reports 34 stock positions and MGK reports 55. 67.3% of ARKX's weight sits in names MGK does not hold, and 62.5% of MGK's weight in names ARKX does not hold. The ten largest positions are 54.5% of ARKX and 66.8% of MGK.
How do ARKX and MGK differ by sector?
The widest gap is Technology: MGK 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.
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.