IWO vs VXF overlap - what they share and where they differ
IWO and VXF share 21.0% of their weight across 709 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.
IWO and VXF
21.0%
709 shared positions
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
VXF
VANGUARD EXTENDED MARKET INDEX FUND
Reported positions cover 99% of the fund, 1,792 positions · Jun 30, 2026
Top 10: 7.6%·Holdings of VXF
Reported positions cover IWO 99%, VXF 99% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
VXF vs IWO side by side
IWOiShares Russell 2000 Growth ETF
975
stock positions reported to the SEC
10.1% of its weight is in 266 names VXF does not hold
VXFVANGUARD EXTENDED MARKET INDEX FUND
1,792
stock positions reported to the SEC
76.5% of its weight is in 1,083 names IWO does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Healthcare: IWO has 12.6 points more of it.
The figures side by side
| IWO | VXF | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 975 | 1,792 |
| Weight of the ten largest | 6.1% | 7.6% |
| Largest position | MOG.A 0.7% | SPCX 1.2% |
| Held alone | 266 positions, 10.1% | 1,083 positions, 76.5% |
| Covered by stock positions | 99% | 99% |
Holdings they share
| Stock | In IWO | In VXF | Counted |
|---|---|---|---|
| HUTHut 8 Corp. | 0.38% | 0.14% | 0.14% |
| MOG.AMoog, Inc. | 0.73% | 0.14% | 0.14% |
| AGXArgan, Inc. | 0.66% | 0.13% | 0.13% |
| BTSGBrightSpring Health Services, Inc. | 0.68% | 0.13% | 0.13% |
| MXLMaxLinear, Inc. | 0.66% | 0.13% | 0.13% |
| ESEESCO Technologies, Inc. | 0.56% | 0.11% | 0.11% |
| KRYSKrystal Biotech, Inc. | 0.58% | 0.11% | 0.11% |
| ALKSAlkermes plc | 0.42% | 0.10% | 0.10% |
| COMPCompass Diversified Holdings | 0.53% | 0.10% | 0.10% |
| CORZCore Scientific, Inc. | 0.42% | 0.10% | 0.10% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IWO
Only in VXF
Questions people ask
Is IWO the same as VXF?
21.0% of their weight sits in the same 709 holdings. IWO also reports FROG, KULICKE & SOFFA INDUSTRIES, INC., NUVALENT, INC., which the other does not. VXF also reports SPCX, SNOW, BE, which the other does not.
How is the overlap between IWO and VXF 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 IWO and 99% of VXF, so the number cannot exceed the smaller coverage.
Which holds more, VXF or IWO?
IWO reports 975 stock positions and VXF reports 1,792. 10.1% of IWO's weight sits in names VXF does not hold, and 76.5% of VXF's weight in names IWO does not hold. The ten largest positions are 6.1% of IWO and 7.6% of VXF.
How do IWO and VXF differ by sector?
The widest gap is Healthcare: IWO has 12.6 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.