ARKG vs IWO overlap - what they share and where they differ
ARKG and IWO share 2.0% of their weight across 19 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.
ARKG and IWO
2.0%
19 shared positions
ARKG
ARK Genomic Revolution ETF
Reported positions cover 100% of the fund, 32 positions · Apr 30, 2026
Top 10: 58.8%·Holdings of ARKG
IWO
iShares Russell 2000 Growth ETF
Reported positions cover 99% of the fund, 975 positions · Jun 30, 2026
Top 10: 6.1%·Holdings of IWO
Reported positions cover ARKG 100%, IWO 99% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
IWO vs ARKG side by side
ARKGARK Genomic Revolution ETF
32
stock positions reported to the SEC
38.2% of its weight is in 13 names IWO does not hold
IWOiShares Russell 2000 Growth ETF
975
stock positions reported to the SEC
97.4% of its weight is in 956 names ARKG does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Healthcare: ARKG has 56.5 points more of it.
The figures side by side
| ARKG | IWO | |
|---|---|---|
| Filing date | Apr 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 32 | 975 |
| Weight of the ten largest | 58.8% | 6.1% |
| Largest position | TEM 9.4% | MOG.A 0.7% |
| Held alone | 13 positions, 38.2% | 956 positions, 97.4% |
| Covered by stock positions | 100% | 99% |
Holdings they share
| Stock | In ARKG | In IWO | Counted |
|---|---|---|---|
| TWSTTWIST BIOSCIENCE CORP | 8.99% | 0.38% | 0.38% |
| TXG10X GENOMICS INC | 5.77% | 0.24% | 0.24% |
| VCYTVERACYTE INC | 2.66% | 0.22% | 0.22% |
| ADPTADAPTIVE BIOTECHNOLOGIES CORP | 2.42% | 0.20% | 0.20% |
| BEAMBEAM THERAPEUTICS INC | 5.43% | 0.18% | 0.18% |
| BFLYBUTTERFLY NETWORK INC | 1.89% | 0.11% | 0.11% |
| NRIXNURIX THERAPEUTICS INC | 2.33% | 0.11% | 0.11% |
| ATAIATAIBECKLEY INC | 1.48% | 0.09% | 0.09% |
| CDNACAREDX INC | 3.38% | 0.09% | 0.09% |
| ABSIABSCI CORP | 4.78% | 0.08% | 0.08% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in ARKG
Only in IWO
Questions people ask
Is ARKG the same as IWO?
2.0% of their weight sits in the same 19 holdings. ARKG also reports TEM, NTRA, ILMN, which the other does not. IWO also reports MOG.A, BTSG, AGX, which the other does not.
How is the overlap between ARKG and IWO 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 ARKG and 99% of IWO, so the number cannot exceed the smaller coverage.
Which holds more, IWO or ARKG?
ARKG reports 32 stock positions and IWO reports 975. 38.2% of ARKG's weight sits in names IWO does not hold, and 97.4% of IWO's weight in names ARKG does not hold. The ten largest positions are 58.8% of ARKG and 6.1% of IWO.
How do ARKG and IWO differ by sector?
The widest gap is Healthcare: ARKG has 56.5 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.