IWR vs IWS: Holdings Overlap
IWRiShares Russell Mid-Cap ETF
iShares · 806 holdings · $57.6B · as of 2026-03-31
IWSiShares Russell Mid-Cap Value ETF
iShares · 712 holdings · $15.9B · as of 2026-03-31
How similar are IWR and IWS?
iShares Russell Mid-Cap ETF (IWR, by iShares) holds 806 positions; iShares Russell Mid-Cap Value ETF (IWS, by iShares) holds 712. They have 712 holdings in common, and by portfolio weight the two funds are 80.5% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 80.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 712IWR holds 806 · IWS holds 712
- Weight in Shared Holdings
- IWR 86%·IWS 100%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in IWR
94 of 806 positions (13.9% of the fund) are not held by IWS. Showing the top 30 by weight.
Only in IWS
Every position in IWS is also held by IWR, so it brings nothing the other fund doesn’t already own.
Sector Breakdown
| Sector | IWR | IWS |
|---|---|---|
| Industrials | 18.7% | 17.1% |
| Financials | 13.6% | 15.1% |
| Information Technology | 13.0% | 12.3% |
| Consumer Discretionary | 10.8% | 7.8% |
| Health Care | 9.2% | 7.6% |
| Other Sectors | 34.3% | 39.6% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWR | +2.9% | +18.1% | +23.0% | +16.4% | +8.5% | +11.6% | 1.12% |
| IWS | +3.3% | +22.1% | +29.8% | +16.6% | +9.8% | +10.4% | 1.27% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in IWR vs IWS →
Shared Holdings(712)
The top 10 shared positions account for 8% of the overlap, led by GLW, WDC and SNDK.
 GLWCorning Incorporated COM | 0.84% | 1.08% | 0.84% |
|---|---|---|---|
 WDCWestern Digital Corp. COM | 0.73% | 0.94% | 0.73% |
 SNDKSandisk Corporation COM | 0.72% | 0.92% | 0.72% |
 BNYThe Bank of New York Mellon Corp. COM | 0.65% | 0.77% | 0.65% |
 VLOValero Energy Corp. COM | 0.60% | 0.76% | 0.60% |
 CMICummins Inc. COM | 0.59% | 0.75% | 0.59% |
 MPCMarathon Petroleum Corp. COM | 0.58% | 0.75% | 0.58% |
 PSXPhillips 66 COM | 0.58% | 0.69% | 0.58% |
 ROSTRoss Stores Inc COM | 0.55% | 0.56% | 0.55% |
 KMIKinder Morgan, Inc. COM | 0.52% | 0.66% | 0.52% |
 LHXL3 Harris Technologies Inc COM | 0.51% | 0.66% | 0.51% |
 WBDWarner Bros. Discovery Inc. COM SER A | 0.51% | 0.65% | 0.51% |
 DLRDigital Realty Trust Inc. COM | 0.49% | 0.63% | 0.49% |
 BKRBaker Hughes Co., Class A | 0.48% | 0.62% | 0.48% |
 SPGSimon Property Group Inc COM | 0.48% | 0.48% | 0.48% |
 CTVACorteva Inc COM | 0.45% | 0.58% | 0.45% |
 OKEOneok Inc. COM | 0.45% | 0.57% | 0.45% |
 ORealty Income Corporation COM | 0.44% | 0.57% | 0.44% |
 CIENCiena Corporation COM NEW | 0.43% | 0.56% | 0.43% |
 ALLThe Allstate Corporation COM | 0.43% | 0.55% | 0.43% |
 HOODRobinhood Markets, Inc., Class A | 0.42% | 0.46% | 0.42% |
 EAElectronic Arts Inc. COM | 0.41% | 0.52% | 0.41% |
 ETREntergy Corporation COM | 0.40% | 0.51% | 0.40% |
 EXCExelon Corp. COM | 0.39% | 0.50% | 0.39% |
 LITELumentum Holdings Inc. COM | 0.39% | 0.47% | 0.39% |
Showing the top 250 of 712 shared holdings by overlap weight.
Frequently Asked Questions
How much do IWR and IWS overlap?
IWR and IWS overlap by 80.5% of portfolio weight. They share 712 holdings (IWR holds 806 positions and IWS holds 712), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWR and IWS?
The two portfolios are 80.5% identical by weight. Owning both mostly doubles down on the shared core rather than diversifying: the same large positions drive both funds.
What are the biggest shared holdings of IWR and IWS?
The largest positions held by both funds are GLW, WDC, SNDK, BNY and VLO. Together the top 10 shared positions account for 8% of the total overlap.
What does IWR own that IWS doesn't?
94 positions (13.9% of IWR) are unique to IWR, led by VRT, HWM and RCL. In the other direction, 0 positions (0.0% of IWS) are unique to IWS.