IWP vs IYM: Holdings Overlap
IWPiShares Russell Mid-Cap Growth ETF
iShares · 277 holdings · $20.5B · as of 2026-03-31
IYMiShares U.S. Basic Materials ETF
iShares · 38 holdings · $1.1B · as of 2026-04-30
Holdings snapshots are 30 days apart (IWP: 2026-03-31, IYM: 2026-04-30). 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 IYM?
iShares Russell Mid-Cap Growth ETF (IWP, by iShares) holds 277 positions; iShares U.S. Basic Materials ETF (IYM, by iShares) holds 38. They have 5 holdings in common, and by portfolio weight the two funds are 2.1% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 2.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 5IWP holds 277 · IYM holds 38
- Weight in Shared Holdings
- IWP 2%·IYM 15%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
272 of 277 positions (97.8% of the fund) are not held by IYM. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWP | IYM |
|---|---|---|
| Materials | 0.3% | 88.4% |
| Industrials | 24.4% | 11.4% |
| Consumer Discretionary | 21.2% | 0.0% |
| Information Technology | 15.6% | 0.0% |
| Health Care | 14.9% | 0.0% |
| Other Sectors | 23.5% | 0.0% |
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% |
| IYM | +5.2% | +23.1% | +34.0% | +13.6% | +9.2% | +10.8% | 1.24% |
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 IYM →
Shared Holdings(5)
The top 5 shared positions account for 100% of the overlap, led by FAST, AU and RBC.
Frequently Asked Questions
How much do IWP and IYM overlap?
IWP and IYM overlap by 2.1% of portfolio weight. They share 5 holdings (IWP holds 277 positions and IYM holds 38), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWP and IYM?
The two portfolios are 2.1% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IWP and IYM?
The largest positions held by both funds are FAST, AU, RBC, CRS and STLD. Together the top 5 shared positions account for 100% of the total overlap.
What does IWP own that IYM doesn't?
272 positions (97.8% of IWP) are unique to IWP, led by VRT, HWM and RCL. In the other direction, 33 positions (84.7% of IYM) are unique to IYM.