IWO vs VBK overlap - what they share and where they differ
IWO and VBK share 20.7% of their weight across 239 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 VBK
20.7%
239 shared positions
IWO
iShares Russell 2000 Growth ETF
Reported positions cover 100% of the fund, 1,110 positions · Jun 30, 2026
Top 10: 6.0%·Holdings of IWO
VBK
VANGUARD SMALL-CAP GROWTH INDEX FUND
Reported positions cover 100% of the fund, 537 positions · Jun 30, 2026
Top 10: 9.3%·Holdings of VBK
Reported positions cover IWO 100%, VBK 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
VBK vs IWO side by side
IWOiShares Russell 2000 Growth ETF
1,110
stock positions reported to the SEC
54.6% of its weight is in 871 names VBK does not hold
VBKVANGUARD SMALL-CAP GROWTH INDEX FUND
537
stock positions reported to the SEC
77.4% of its weight is in 298 names IWO does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Healthcare: IWO has 8.7 points more of it.
The figures side by side
| IWO | VBK | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 1,110 | 537 |
| Weight of the ten largest | 6.0% | 9.3% |
| Largest position | MOG.A 0.7% | CRDO 1.3% |
| Held alone | 871 positions, 54.6% | 298 positions, 77.4% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IWO | In VBK | Counted |
|---|---|---|---|
| HUTHut 8 Corp. | 0.38% | 0.33% | 0.33% |
| BTSGBrightSpring Health Services, Inc. | 0.68% | 0.32% | 0.32% |
| MXLMaxLinear, Inc. | 0.66% | 0.31% | 0.31% |
| AGXArgan, Inc. | 0.66% | 0.30% | 0.30% |
| KRYSKrystal Biotech, Inc. | 0.58% | 0.29% | 0.29% |
| CIFRCipher Digital, Inc. | 0.50% | 0.27% | 0.27% |
| FROGJFrog Ltd. | 0.59% | 0.26% | 0.26% |
| RIOTRiot Platforms, Inc. | 0.39% | 0.26% | 0.26% |
| ALKSAlkermes plc | 0.42% | 0.25% | 0.25% |
| ESEESCO Technologies, Inc. | 0.56% | 0.25% | 0.25% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IWO
Only in VBK
Questions people ask
Is IWO the same as VBK?
20.7% of their weight sits in the same 239 holdings. IWO also reports MOG.A, FCFS, COMP, which the other does not. VBK also reports CRDO, RVMD, ALAB, which the other does not.
How is the overlap between IWO and VBK 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 IWO and 100% of VBK, so the number cannot exceed the smaller coverage.
Which holds more, VBK or IWO?
IWO reports 1,110 stock positions and VBK reports 537. 54.6% of IWO's weight sits in names VBK does not hold, and 77.4% of VBK's weight in names IWO does not hold. The ten largest positions are 6.0% of IWO and 9.3% of VBK.
How do IWO and VBK differ by sector?
The widest gap is Healthcare: IWO has 8.7 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.