IWP vs VBK overlap - what they share and where they differ
IWP and VBK share 33.4% of their weight across 136 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.
IWP and VBK
33.4%
136 shared positions
IWP
iShares Russell Mid-Cap Growth ETF
Reported positions cover 100% of the fund, 261 positions · Jun 30, 2026
Top 10: 19.7%·Holdings of IWP
VBK
VANGUARD SMALL-CAP GROWTH INDEX FUND
Reported positions cover 100% of the fund, 536 positions · Jun 30, 2026
Top 10: 9.3%·Holdings of VBK
Reported positions cover IWP 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 IWP side by side
IWPiShares Russell Mid-Cap Growth ETF
261
stock positions reported to the SEC
63.2% of its weight is in 125 names VBK does not hold
VBKVANGUARD SMALL-CAP GROWTH INDEX FUND
536
stock positions reported to the SEC
52.4% of its weight is in 400 names IWP does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Healthcare: VBK has 4.8 points more of it.
The figures side by side
| IWP | VBK | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 261 | 536 |
| Weight of the ten largest | 19.7% | 9.3% |
| Largest position | DDOG 2.3% | CRDO 1.3% |
| Held alone | 125 positions, 63.2% | 400 positions, 52.4% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IWP | In VBK | Counted |
|---|---|---|---|
| CRDOCredo Technology Group Holding Ltd. | 1.23% | 1.27% | 1.23% |
| ALABAstera Labs, Inc. | 2.02% | 1.05% | 1.05% |
| NTRANatera, Inc. | 1.01% | 1.04% | 1.01% |
| RVMDRevolution Medicines, Inc. | 0.98% | 1.06% | 0.98% |
| CRSCarpenter Technology Corp. | 0.81% | 0.82% | 0.81% |
| FTAIFTAI Aviation Ltd. | 0.75% | 0.78% | 0.75% |
| ATIATI, Inc. | 0.73% | 0.76% | 0.73% |
| MTZMasTec, Inc. | 0.71% | 0.74% | 0.71% |
| MTSIMACOM Technology Solutions Holdings, Inc. | 0.70% | 0.73% | 0.70% |
| STRLSterling Infrastructure, Inc. | 0.69% | 0.69% | 0.69% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IWP
Only in VBK
Questions people ask
Is IWP the same as VBK?
33.4% of their weight sits in the same 136 holdings. IWP also reports DDOG, SNOW, NET, which the other does not. VBK also reports CASEY'S GENERAL STORES INC, OKTA, LIBERTY MEDIA CORP-LIBERTY FORMULA ONE, which the other does not.
How is the overlap between IWP 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 IWP and 100% of VBK, so the number cannot exceed the smaller coverage.
Which holds more, VBK or IWP?
IWP reports 261 stock positions and VBK reports 536. 63.2% of IWP's weight sits in names VBK does not hold, and 52.4% of VBK's weight in names IWP does not hold. The ten largest positions are 19.7% of IWP and 9.3% of VBK.
How do IWP and VBK differ by sector?
The widest gap is Healthcare: VBK has 4.8 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.
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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.