IWM vs IWS: Holdings Overlap
iShares · 1941 holdings · $82.2B · as of 2026-03-31
IWSiShares Russell Mid-Cap Value ETF
iShares · 712 holdings · $15.9B · as of 2026-03-31
How similar are IWM and IWS?
iShares Russell 2000 ETF (IWM, by iShares) holds 1941 positions; iShares Russell Mid-Cap Value ETF (IWS, by iShares) holds 712. They have 0 holdings in common, and by portfolio weight the two funds are 0.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 0IWM holds 1941 · IWS holds 712
- Weight in Shared Holdings
- IWM 0%·IWS 0%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 IWM
1941 of 1941 positions (99.7% of the fund) are not held by IWS. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWM | IWS |
|---|---|---|
| Industrials | 17.9% | 17.1% |
| Health Care | 16.6% | 7.6% |
| Financials | 15.3% | 15.1% |
| Information Technology | 13.6% | 12.3% |
| Energy | 6.0% | 8.5% |
| Other Sectors | 24.8% | 39.0% |
| Unclassified | 5.5% | 0.1% |
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. “Unclassified” is weight we could not classify (5% of IWM, 0% of IWS).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWM | +1.8% | +23.0% | +38.6% | +17.1% | +7.5% | +10.8% | 0.88% |
| 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 IWM vs IWS →
Shared Holdings(0)
These two funds have no holdings in common.
Frequently Asked Questions
How much do IWM and IWS overlap?
IWM and IWS overlap by 0.0% of portfolio weight. They share 0 holdings (IWM holds 1941 positions and IWS holds 712), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWM and IWS?
The two portfolios are 0.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What does IWM own that IWS doesn't?
1941 positions (99.7% of IWM) are unique to IWM, led by BE, CDE and FN. In the other direction, 712 positions (99.7% of IWS) are unique to IWS.