IWP vs MDYG: Holdings Overlap
IWPiShares Russell Mid-Cap Growth ETF
iShares · 277 holdings · $20.5B · as of 2026-03-31
MDYGState Street® SPDR® S&P 400™ Mid Cap Growth ETF
State Street (SPDR) · 245 holdings · $2.9B · as of 2026-08-06
Holdings snapshots are 128 days apart (IWP: 2026-03-31, MDYG: 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 IWP and MDYG?
iShares Russell Mid-Cap Growth ETF (IWP, by iShares) holds 277 positions; State Street® SPDR® S&P 400™ Mid Cap Growth ETF (MDYG, by State Street (SPDR)) holds 245. They have 76 holdings in common, and by portfolio weight the two funds are 13.3% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 13.3%Sum of the smaller weight of each shared holding
- Shared Holdings
- 76IWP holds 277 · MDYG holds 245
- Weight in Shared Holdings
- IWP 14%·MDYG 34%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 IWP
201 of 277 positions (86.2% of the fund) are not held by MDYG. Showing the top 30 by weight.
Only in MDYG
169 of 245 positions (65.5% of the fund) are not held by IWP. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWP | MDYG |
|---|---|---|
| Industrials | 24.4% | 29.8% |
| Consumer Discretionary | 21.2% | 9.0% |
| Information Technology | 15.6% | 20.2% |
| Health Care | 14.9% | 15.5% |
| Financials | 8.5% | 8.0% |
| Other Sectors | 15.3% | 17.3% |
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 |
|---|---|---|---|---|---|---|---|
| IWP | +1.5% | +5.4% | +3.1% | +14.6% | +5.1% | +12.1% | 0.34% |
| MDYG | +3.3% | +21.6% | +28.0% | +16.0% | +8.5% | +11.3% | 0.56% |
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 IWP vs MDYG →
Shared Holdings(76)
The top 10 shared positions account for 36% of the overlap, led by BURL, P and SGI.
 BURLBurlington Stores Inc. COM | 0.74% | 0.76% | 0.74% |
|---|---|---|---|
 PEverpure, Inc., Class A | 0.57% | 1.47% | 0.57% |
 SGISomnigroup International Inc. COM | 0.54% | 0.73% | 0.54% |
 GWREGuidewire Software Inc COM | 0.46% | 0.72% | 0.46% |
 PENPenumbra Inc. COM | 0.45% | 0.68% | 0.45% |
 TOSTToast, Inc., Class A | 0.44% | 0.87% | 0.44% |
 LAMRLamar Advertising Company Class A | 0.39% | 0.45% | 0.39% |
 TXRHTexas Roadhouse Inc COM | 0.39% | 0.73% | 0.39% |
 NBIXNeurocrine Biosciences Inc COM | 0.39% | 0.86% | 0.39% |
 DTDynatrace Inc COM NEW | 0.39% | 0.77% | 0.39% |
 LSCCLattice Semiconductor Corporation COM | 0.39% | 0.55% | 0.39% |
 MEDPMedpace Holdings Inc. COM | 0.39% | 0.70% | 0.39% |
 EQHEquitable Holdings Inc COM | 0.34% | 0.38% | 0.34% |
 EXELExelixis, Inc. COM | 0.33% | 0.70% | 0.33% |
 MANHManhattan Associates Inc COM | 0.28% | 0.37% | 0.28% |
 KNSLKinsale Capital Group Inc COM | 0.27% | 0.44% | 0.27% |
 HALOHalozyme Therapeutics Inc COM | 0.27% | 0.54% | 0.27% |
 DOCUDocusign, Inc., Class A | 0.26% | 0.35% | 0.26% |
 PLNTPlanet Fitness, Inc., Class A | 0.22% | 0.22% | 0.22% |
 BROSDutch Bros, Inc., Class A | 0.23% | 0.20% | 0.20% |
 CELHCelsius Holdings Inc. COM NEW | 0.21% | 0.20% | 0.20% |
 CHWYChewy, Inc., Class A | 0.23% | 0.20% | 0.20% |
 AAONAaon Inc COM PAR $0.004 | 0.20% | 0.33% | 0.20% |
 CNMCore & Main, Inc., Class A | 0.20% | 0.20% | 0.20% |
 PINSPinterest, Inc., Class A | 0.19% | 0.41% | 0.19% |
Frequently Asked Questions
How much do IWP and MDYG overlap?
IWP and MDYG overlap by 13.3% of portfolio weight. They share 76 holdings (IWP holds 277 positions and MDYG holds 245), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWP and MDYG?
The two portfolios are 13.3% 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 IWP and MDYG?
The largest positions held by both funds are BURL, P, SGI, GWRE and PEN. Together the top 10 shared positions account for 36% of the total overlap.
What does IWP own that MDYG doesn't?
201 positions (86.2% of IWP) are unique to IWP, led by VRT, HWM and RCL. In the other direction, 169 positions (65.5% of MDYG) are unique to MDYG.