IWR vs VB overlap - what they share and where they differ
IWR and VB share 45.0% of their weight across 584 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.
IWR and VB
45.0%
584 shared positions
IWR
iShares Russell Mid-Cap ETF
Reported positions cover 100% of the fund, 812 positions · Jun 30, 2026
Top 10: 5.6%·Holdings of IWR
VB
VANGUARD SMALL-CAP INDEX FUND
Reported positions cover 100% of the fund, 1,294 positions · Jun 30, 2026
Top 10: 4.3%·Holdings of VB
Reported positions cover IWR 100%, VB 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
VB vs IWR side by side
IWRiShares Russell Mid-Cap ETF
812
stock positions reported to the SEC
54.0% of its weight is in 228 names VB does not hold
VBVANGUARD SMALL-CAP INDEX FUND
1,294
stock positions reported to the SEC
26.7% of its weight is in 710 names IWR does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: IWR has 1.4 points more of it.
The figures side by side
| IWR | VB | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 812 | 1,294 |
| Weight of the ten largest | 5.6% | 4.3% |
| Largest position | DDOG 0.6% | CRDO 0.6% |
| Held alone | 228 positions, 54.0% | 710 positions, 26.7% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IWR | In VB | Counted |
|---|---|---|---|
| ALABAstera Labs, Inc. | 0.53% | 0.45% | 0.45% |
| FLEXFlex Ltd. | 0.43% | 0.36% | 0.36% |
| CRDOCredo Technology Group Holding Ltd. | 0.32% | 0.55% | 0.32% |
| JBLJabil, Inc. | 0.29% | 0.49% | 0.29% |
| NTRANatera, Inc. | 0.27% | 0.45% | 0.27% |
| EMEEMCOR Group, Inc. | 0.26% | 0.45% | 0.26% |
| RVMDRevolution Medicines, Inc. | 0.26% | 0.46% | 0.26% |
| CRSCarpenter Technology Corp. | 0.22% | 0.35% | 0.22% |
| MKSIMKS, Inc. | 0.22% | 0.37% | 0.22% |
| TWLOTwilio, Inc. | 0.22% | 0.38% | 0.22% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IWR
Only in VB
Questions people ask
Is IWR the same as VB?
45.0% of their weight sits in the same 584 holdings. IWR also reports DDOG, SNOW, RCL, which the other does not. VB also reports TEMPUR SEALY INTERNATIONAL INC, PRC NEWCO INC, MOG.A, which the other does not.
How is the overlap between IWR and VB 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 IWR and 100% of VB, so the number cannot exceed the smaller coverage.
Which holds more, VB or IWR?
IWR reports 812 stock positions and VB reports 1,294. 54.0% of IWR's weight sits in names VB does not hold, and 26.7% of VB's weight in names IWR does not hold. The ten largest positions are 5.6% of IWR and 4.3% of VB.
How do IWR and VB differ by sector?
The widest gap is Technology: IWR has 1.4 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.