IWR vs MDYV: Holdings Overlap
IWRiShares Russell Mid-Cap ETF
iShares · 806 holdings · $57.6B · as of 2026-03-31
MDYVState Street® SPDR® S&P 400™ Mid Cap Value ETF
State Street (SPDR) · 297 holdings · $2.9B · as of 2026-08-06
Holdings snapshots are 128 days apart (IWR: 2026-03-31, MDYV: 2026-08-06). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are IWR and MDYV?
iShares Russell Mid-Cap ETF (IWR, by iShares) holds 806 positions; State Street® SPDR® S&P 400™ Mid Cap Value ETF (MDYV, by State Street (SPDR)) holds 297. They have 234 holdings in common, and by portfolio weight the two funds are 14.4% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 14.4%Sum of the smaller weight of each shared holding
- Shared Holdings
- 234IWR holds 806 · MDYV holds 297
- Weight in Shared Holdings
- IWR 14%·MDYV 85%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
572 of 806 positions (85.3% of the fund) are not held by MDYV. Showing the top 30 by weight.
Only in MDYV
63 of 297 positions (15.0% of the fund) are not held by IWR. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWR | MDYV |
|---|---|---|
| Financials | 13.6% | 23.4% |
| Industrials | 18.7% | 18.7% |
| Information Technology | 13.0% | 8.3% |
| Consumer Discretionary | 10.8% | 12.5% |
| Health Care | 9.2% | 4.1% |
| Other Sectors | 34.3% | 32.9% |
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% |
| MDYV | +3.1% | +15.2% | +23.9% | +12.9% | +9.2% | +10.6% | 1.64% |
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 MDYV →
Shared Holdings(234)
The top 10 shared positions account for 10% of the overlap, led by USFD, BURL and ILMN.
 USFDUS Foods Holding Corp COM | 0.16% | 1.34% | 0.16% |
|---|---|---|---|
 BURLBurlington Stores Inc. COM | 0.16% | 0.52% | 0.16% |
 ILMNIllumina Inc COM | 0.15% | 0.77% | 0.15% |
 ENTGEntegris Inc COM | 0.14% | 0.74% | 0.14% |
 AAAlcoa Corporation COM | 0.14% | 0.71% | 0.14% |
 OVVOvintiv Inc COM | 0.14% | 0.94% | 0.14% |
 RSReliance Inc COM | 0.13% | 1.21% | 0.13% |
 MKSIMKS Inc. COM | 0.12% | 0.32% | 0.12% |
 NLYAnnaly Capital Management, Inc. COM NEW | 0.12% | 0.94% | 0.12% |
 WPCW. P. Carey Inc COM | 0.12% | 0.43% | 0.12% |
 PRPermian Resources Corporation Class A | 0.12% | 0.91% | 0.12% |
 EWBCEast West Bancorp Inc COM | 0.12% | 0.50% | 0.12% |
 CLHClean Harbors, Inc. COM | 0.12% | 0.42% | 0.12% |
 JLLJones Lang LaSalle Incorporated COM | 0.11% | 0.96% | 0.11% |
 GGGGraco Inc COM | 0.11% | 0.38% | 0.11% |
 CSLCarlisle Companies Incorporated | 0.11% | 0.50% | 0.11% |
 DTMDT Midstream Inc COMMON STOCK | 0.11% | 0.22% | 0.11% |
 TRUTransUnion COM | 0.11% | 0.42% | 0.11% |
 RNRRenaissancere Holdings Ltd. COM USD1 | 0.11% | 0.38% | 0.11% |
 RGAReinsurance Group of America, Incorporated COM NEW | 0.11% | 0.88% | 0.11% |
 LECOLincoln Electric Holdings Inc. COM | 0.11% | 0.28% | 0.11% |
 PFGCPerformance Food Group Co. COM | 0.10% | 1.02% | 0.10% |
 OHIOmega Healthcare Investors, Inc. COM | 0.10% | 0.38% | 0.10% |
 BJBJ's Wholesale Club Holdings, Inc. | 0.10% | 0.70% | 0.10% |
 WCCWesco International, Inc. COM | 0.10% | 1.03% | 0.10% |
Frequently Asked Questions
How much do IWR and MDYV overlap?
IWR and MDYV overlap by 14.4% of portfolio weight. They share 234 holdings (IWR holds 806 positions and MDYV holds 297), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWR and MDYV?
The two portfolios are 14.4% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of IWR and MDYV?
The largest positions held by both funds are USFD, BURL, ILMN, ENTG and AA. Together the top 10 shared positions account for 10% of the total overlap.
What does IWR own that MDYV doesn't?
572 positions (85.3% of IWR) are unique to IWR, led by GLW, VRT and HWM. In the other direction, 63 positions (15.0% of MDYV) are unique to MDYV.