IJR vs VB: how much do they really overlap?
IJR (iShares Core S&P Small-Cap ETF, tracking the S&P SmallCap 600) and VB (Vanguard Small-Cap ETF, tracking the CRSP US Small Cap) overlap by roughly 0% by weight. 0 of IJR's top 10 holdings also appear in VB. A 50/50 blend of the two behaves like about 2001 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 0 holdings appear in both IJR and VB. The weight columns show how much of each fund each name represents.
| Holding | in IJR | in VB |
|---|
Only in IJR
iShares Core S&P Small-Cap ETF — US small-cap. Its biggest holdings that VB doesn’t have:
| XTSLA BLK CSH FND TREASURY SL AGENCY | 1.96% |
| FORM FORMFACTOR INC | 0.67% |
| VSAT VIASAT INC | 0.66% |
| MOH MOLINA HEALTHCARE INC | 0.65% |
| AGX ARGAN INC | 0.60% |
| BTSG BRIGHTSPRING HEALTH SERVICES INC | 0.60% |
| ESI ELEMENT SOLUTIONS INC | 0.59% |
| MXL MAXLINEAR INC | 0.58% |
Only in VB
Vanguard Small-Cap ETF — US small-cap. Its biggest holdings that IJR doesn’t have:
| FLEX Flex Ltd. | 0.69% |
| ALAB Astera Labs Inc. | 0.62% |
| CIEN Ciena Corp. | 0.51% |
| RKLB Rocket Lab Corp. | 0.50% |
| CRDO Credo Technology Group Holding Ltd. | 0.48% |
| BE Bloom Energy Corp. Class A | 0.47% |
| EME EMCOR Group Inc. | 0.46% |
| JBL Jabil Inc. | 0.45% |
So — essentially different. Should you hold both?
IJR and VB hold almost none of the same securities — they are complementary, not redundant. Held together they genuinely broaden your exposure — a 50/50 blend reaches ~2001 effective positions (grade A), because they hold largely different securities.
Holdings as of — IJR: Jun 30, 2026 (iShares (BlackRock)); VB: May 31, 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 →IJR vs VB — FAQ
- How much do IJR and VB overlap?
- IJR and VB overlap by approximately 0% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 0 of IJR's 10 largest holdings are also held by VB. They share 0 of their listed top holdings in total.
- Is it redundant to hold both IJR and VB?
- 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 2001 positions and a A diversification grade.
- What does VB hold that IJR doesn't?
- VB's largest holdings that IJR doesn't hold include FLEX, ALAB, CIEN, RKLB, CRDO. Its category is US small-cap, versus IJR's US small-cap.
- Which is more concentrated, IJR or VB?
- IJR's top 10 holdings are 31% of its listed weight; VB's are 29%. The more concentrated fund leans harder on its largest names.