IJJ vs IYM: Holdings Overlap
IJJiShares S&P Mid-Cap 400 Value ETF
iShares · 301 holdings · $9.0B · 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 (IJJ: 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 IJJ and IYM?
iShares S&P Mid-Cap 400 Value ETF (IJJ, by iShares) holds 301 positions; iShares U.S. Basic Materials ETF (IYM, by iShares) holds 38. They have 11 holdings in common, and by portfolio weight the two funds are 4.4% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 4.4%Sum of the smaller weight of each shared holding
- Shared Holdings
- 11IJJ holds 301 · IYM holds 38
- Weight in Shared Holdings
- IJJ 4%·IYM 11%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 IJJ
290 of 301 positions (94.8% of the fund) are not held by IYM. Showing the top 30 by weight.
Sector Breakdown
| Sector | IJJ | IYM |
|---|---|---|
| Materials | 8.2% | 88.4% |
| Financials | 22.4% | 0.0% |
| Industrials | 19.0% | 11.4% |
| Consumer Discretionary | 12.4% | 0.0% |
| Real Estate | 8.2% | 0.0% |
| Other Sectors | 28.9% | 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 |
|---|---|---|---|---|---|---|---|
| IJJ | +3.0% | +15.1% | +23.8% | +12.8% | +9.2% | +10.5% | 1.56% |
| 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 IJJ vs IYM →
Shared Holdings(11)
The top 10 shared positions account for 96% of the overlap, led by AA, RS and TKR.
 AAAlcoa Corporation COM | 1.09% | 1.83% | 1.09% |
|---|---|---|---|
 RSReliance Inc COM | 1.01% | 2.11% | 1.01% |
 TKRThe Timken Company COM | 0.41% | 0.77% | 0.41% |
 SOLSSolstice Advanced Materials Inc. COM SHS | 0.36% | 1.45% | 0.36% |
 CLFCleveland-Cliffs Inc COM | 0.31% | 0.64% | 0.31% |
 WLKWestlake Corporation COM | 0.25% | 0.43% | 0.25% |
 MLIMueller Industries Inc. COM | 0.22% | 1.63% | 0.22% |
 OLNOlin Corporation COM PAR $1 | 0.22% | 0.36% | 0.22% |
 SMGThe Scotts Miracle-Gro Company CL A | 0.17% | 0.30% | 0.17% |
 MPMP Materials Corp., Class A | 0.17% | 1.05% | 0.17% |
 ASHAshland Inc. COM | 0.16% | 0.27% | 0.16% |
Frequently Asked Questions
How much do IJJ and IYM overlap?
IJJ and IYM overlap by 4.4% of portfolio weight. They share 11 holdings (IJJ holds 301 positions and IYM holds 38), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IJJ and IYM?
The two portfolios are 4.4% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IJJ and IYM?
The largest positions held by both funds are AA, RS, TKR, SOLS and CLF. Together the top 10 shared positions account for 96% of the total overlap.
What does IJJ own that IYM doesn't?
290 positions (94.8% of IJJ) are unique to IJJ, led by USFD, OVV and PR. In the other direction, 27 positions (89.0% of IYM) are unique to IYM.