IJH vs VXF: how much do they really overlap?
IJH (iShares Core S&P Mid-Cap ETF, tracking the S&P MidCap 400) and VXF (Vanguard Extended Market ETF, tracking the S&P Completion) overlap by roughly 31% by weight. 10 of IJH's top 10 holdings also appear in VXF. A 50/50 blend of the two behaves like about 1248 equally-weighted bets (diversification grade A). In short, the two funds share a meaningful core of the same megacaps, but each also brings real exposure the other lacks.
The same companies, in both funds
These 20 holdings appear in both IJH and VXF. The weight columns show how much of each fund each name represents.
| Holding | in IJH | in VXF |
|---|---|---|
| TWLO TWILIO INC CLASS A | 0.81% | 0.35% |
| CRS CARPENTER TECHNOLOGY CORP | 0.70% | 0.35% |
| MKSI MKS | 0.56% | 0.34% |
| CW CURTISS WRIGHT CORP | 0.74% | 0.32% |
| NVT NVENT ELECTRIC PLC | 0.66% | 0.31% |
| ENTG ENTEGRIS INC | 0.50% | 0.31% |
| ILMN ILLUMINA INC | 0.87% | 0.30% |
| FTI TECHNIPFMC PLC | 0.77% | 0.30% |
| ATI ATI INC | 0.70% | 0.30% |
| WWD WOODWARD INC | 0.59% | 0.29% |
| MTZ MASTEC INC | 0.56% | 0.29% |
| STRL STERLING INFRASTRUCTURE INC | 0.50% | 0.29% |
| P EVERPURE INC CLASS A | 0.66% | 0.28% |
| MTSI MACOM TECHNOLOGY SOLUTIONS INC | 0.46% | 0.28% |
| XPO XPO INC | 0.66% | 0.27% |
+ 5 more shared holdings.
Only in IJH
iShares Core S&P Mid-Cap ETF — US mid-cap. Its biggest holdings that VXF doesn’t have:
| BURL BURLINGTON STORES INC | 0.66% |
| THC TENET HEALTHCARE CORP | 0.61% |
| RS RELIANCE STEEL & ALUMINUM | 0.57% |
| ROKU ROKU INC CLASS A | 0.53% |
| SNX TD SYNNEX CORP | 0.53% |
| NBIX NEUROCRINE BIOSCIENCES INC | 0.52% |
| PFGC PERFORMANCE FOOD GROUP | 0.51% |
| EWBC EAST WEST BANCORP INC | 0.50% |
Only in VXF
Vanguard Extended Market ETF — US mid/small completion. Its biggest holdings that IJH doesn’t have:
| SPCX Space Exploration Technologies Corp. Class A | 1.14% |
| SNOW Snowflake Inc. | 0.99% |
| BE Bloom Energy Corp. Class A | 0.89% |
| NET Cloudflare Inc. Class A | 0.88% |
| ALAB Astera Labs Inc. | 0.73% |
| RKLB Rocket Lab Corp. | 0.58% |
| LNG Cheniere Energy Inc. | 0.56% |
| FERG Ferguson Enterprises Inc./DE | 0.52% |
So — partly overlapping. Should you hold both?
IJH and VXF share a meaningful core of the same megacaps, but each also brings real exposure the other lacks. Held together they keep a shared megacap core but each still pulls in exposure the other lacks, so a 50/50 blend spreads to ~1248 effective positions (grade A).
Holdings as of — IJH: Jul 30, 2026 (iShares (BlackRock)); VXF: Jun 30, 2026 (Vanguard). 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 VXF — FAQ
- How much do IJH and VXF overlap?
- IJH and VXF overlap by approximately 31% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 10 of IJH's 10 largest holdings are also held by VXF. They share 20 of their listed top holdings in total.
- Is it redundant to hold both IJH and VXF?
- Because they share a meaningful core of the same megacaps, but each also brings real exposure the other lacks, holding both is partly redundant: you double up on a shared core (TWLO) while each fund still adds distinct exposure. A 50/50 blend has an effective 1248 positions and a A diversification grade.
- What does VXF hold that IJH doesn't?
- VXF's largest holdings that IJH doesn't hold include SPCX, SNOW, BE, NET, ALAB. Its category is US mid/small completion, versus IJH's US mid-cap.
- Which is more concentrated, IJH or VXF?
- IJH's top 10 holdings are 27% of its listed weight; VXF's are 38%. The more concentrated fund leans harder on its largest names.