IWR vs IWS overlap - what they share and where they differ
IWR and IWS share 75.8% of their weight across 705 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 IWS
75.8%
705 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
IWS
iShares Russell Mid-Cap Value ETF
Reported positions cover 100% of the fund, 709 positions · Jun 30, 2026
Top 10: 5.9%·Holdings of IWS
Reported positions cover IWR 100%, IWS 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
IWS vs IWR side by side
IWRiShares Russell Mid-Cap ETF
812
stock positions reported to the SEC
18.2% of its weight is in 107 names IWS does not hold
IWSiShares Russell Mid-Cap Value ETF
709
stock positions reported to the SEC
0.7% of its weight is in 4 names IWR does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: IWR has 5.9 points more of it.
The figures side by side
| IWR | IWS | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 812 | 709 |
| Weight of the ten largest | 5.6% | 5.9% |
| Largest position | DDOG 0.6% | WARNER BROS DISCOVERY INC 0.6% |
| Held alone | 107 positions, 18.2% | 4 positions, 0.7% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IWR | In IWS | Counted |
|---|---|---|---|
| URIUnited Rentals, Inc. | 0.51% | 0.53% | 0.51% |
| COHRCoherent Corp. | 0.50% | 0.54% | 0.50% |
| PSXPhillips 66 | 0.49% | 0.62% | 0.49% |
| WARNER BROS DISCOVERY INCWarner Bros Discovery, Inc. | 0.46% | 0.63% | 0.46% |
| DLRDigital Realty Trust, Inc. | 0.45% | 0.62% | 0.45% |
| KMIKinder Morgan, Inc. | 0.45% | 0.61% | 0.45% |
| ALLAllstate Corp. (The) | 0.44% | 0.60% | 0.44% |
| DALDelta Air Lines, Inc. | 0.44% | 0.56% | 0.44% |
| FLEXFlex Ltd. | 0.43% | 0.58% | 0.43% |
| HPEHewlett Packard Enterprise Co. | 0.43% | 0.59% | 0.43% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IWR
Only in IWS
Questions people ask
Is IWR the same as IWS?
75.8% of their weight sits in the same 705 holdings. IWR also reports DDOG, SNOW, NET, which the other does not. IWS also reports IRON MOUNTAIN INC (REIT), FWONA, AOS, which the other does not.
How is the overlap between IWR and IWS 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 IWS, so the number cannot exceed the smaller coverage.
Which holds more, IWS or IWR?
IWR reports 812 stock positions and IWS reports 709. 18.2% of IWR's weight sits in names IWS does not hold, and 0.7% of IWS's weight in names IWR does not hold. The ten largest positions are 5.6% of IWR and 5.9% of IWS.
How do IWR and IWS differ by sector?
The widest gap is Technology: IWR has 5.9 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.