IJH vs SOXX: how much do they really overlap?
IJH (iShares Core S&P Mid-Cap ETF, tracking the S&P MidCap 400) and SOXX (iShares Semiconductor ETF, tracking the NYSE Semiconductor) overlap by roughly 5% by weight. 1 of IJH's top 10 holdings also appear in SOXX. A 50/50 blend of the two behaves like about 79 equally-weighted bets (diversification grade A). In short, the two funds hold almost none of the same securities — they are complementary, not redundant.
The same companies, in both funds
These 2 holdings appear in both IJH and SOXX. The weight columns show how much of each fund each name represents.
| Holding | in IJH | in SOXX |
|---|---|---|
| ENTG ENTEGRIS INC | 0.75% | 1.22% |
| MTSI MACOM TECHNOLOGY SOLUTIONS INC | 0.68% | 1.17% |
Only in IJH
iShares Core S&P Mid-Cap ETF — US mid-cap. Its biggest holdings that SOXX doesn’t have:
| TWLO TWILIO INC CLASS A | 0.86% |
| CRS CARPENTER TECHNOLOGY CORP | 0.84% |
| MKSI MKS | 0.82% |
| CW CURTISS WRIGHT CORP | 0.77% |
| NVT NVENT ELECTRIC PLC | 0.75% |
| ATI ATI INC | 0.74% |
| ILMN ILLUMINA INC | 0.73% |
| FTI TECHNIPFMC PLC | 0.72% |
Only in SOXX
iShares Semiconductor ETF — semiconductors. Its biggest holdings that IJH doesn’t have:
| MU MICRON TECHNOLOGY INC | 8.54% |
| AMD ADVANCED MICRO DEVICES INC | 8.09% |
| NVDA NVIDIA CORP | 6.81% |
| INTC INTEL CORPORATION | 6.33% |
| AVGO BROADCOM INC | 6.08% |
| AMAT APPLIED MATERIAL INC | 5.77% |
| KLAC KLA CORP | 5.64% |
| LRCX LAM RESEARCH CORP | 4.89% |
So — essentially different. Should you hold both?
IJH and SOXX hold almost none of the same securities — they are complementary, not redundant. Held together they genuinely broaden your exposure — a 50/50 blend reaches ~79 effective positions (grade A), because they hold largely different securities.
Holdings as of — IJH: Jun 30, 2026 (iShares (BlackRock)); SOXX: Jun 30, 2026 (iShares (BlackRock)). Refreshed monthly. Overlap is measured across each fund’s largest holdings (top 50); the diffuse long tail barely moves the math.
See this for YOUR whole portfolio, free →IJH vs SOXX — FAQ
- How much do IJH and SOXX overlap?
- IJH and SOXX overlap by approximately 5% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 1 of IJH's 10 largest holdings are also held by SOXX. They share 2 of their listed top holdings in total.
- Is it redundant to hold both IJH and SOXX?
- Because they hold almost none of the same securities — they are complementary, not redundant, holding both is not redundant — each fund covers largely different holdings, so together they broaden your exposure. A 50/50 blend has an effective 79 positions and a A diversification grade.
- What does SOXX hold that IJH doesn't?
- SOXX's largest holdings that IJH doesn't hold include MU, AMD, NVDA, INTC, AVGO. Its category is semiconductors, versus IJH's US mid-cap.
- Which is more concentrated, IJH or SOXX?
- IJH's top 10 holdings are 27% of its listed weight; SOXX's are 61%. The more concentrated fund leans harder on its largest names.