SOXX vs VB: how much do they really overlap?
SOXX (iShares Semiconductor ETF, tracking the NYSE Semiconductor) and VB (Vanguard Small-Cap ETF, tracking the CRSP US Small Cap) overlap by roughly 10% by weight. 0 of SOXX's top 10 holdings also appear in VB. A 50/50 blend of the two behaves like about 77 equally-weighted bets (diversification grade A). In short, the two funds have only a small shared core — they mostly hold different things and are largely complementary.
The same companies, in both funds
These 4 holdings appear in both SOXX and VB. The weight columns show how much of each fund each name represents.
| Holding | in SOXX | in VB |
|---|---|---|
| CRDO CREDO TECHNOLOGY GROUP HOLDING LTD | 1.89% | 0.54% |
| ALAB ASTERA LABS INC | 2.38% | 0.45% |
| ENTG ENTEGRIS INC | 1.01% | 0.33% |
| MTSI MACOM TECHNOLOGY SOLUTIONS INC | 0.97% | 0.31% |
Only in SOXX
iShares Semiconductor ETF — semiconductors. Its biggest holdings that VB doesn’t have:
| AMD ADVANCED MICRO DEVICES INC | 8.57% |
| NVDA NVIDIA CORP | 8.42% |
| MU MICRON TECHNOLOGY INC | 8.21% |
| AVGO BROADCOM INC | 7.91% |
| INTC INTEL CORPORATION | 5.24% |
| AMAT APPLIED MATERIAL INC | 5.08% |
| TSM TAIWAN SEMICONDUCTOR MANUFACTURING | 4.57% |
| KLAC KLA CORP | 4.28% |
Only in VB
Vanguard Small-Cap ETF — US small-cap. Its biggest holdings that SOXX doesn’t have:
| JBL Jabil Inc. | 0.49% |
| RVMD Revolution Medicines Inc. | 0.45% |
| NTRA Natera Inc. | 0.44% |
| EME EMCOR Group Inc. | 0.44% |
| TWLO Twilio Inc. Class A | 0.37% |
| NRG NRG Energy Inc. | 0.37% |
| MKSI MKS Instruments Inc. | 0.36% |
| FLEX Flex Ltd. | 0.35% |
So — mostly different. Should you hold both?
SOXX and VB have only a small shared core — they mostly hold different things and are largely complementary. Held together they genuinely broaden your exposure — a 50/50 blend reaches ~77 effective positions (grade A), because they hold largely different securities.
Holdings as of — SOXX: Jul 30, 2026 (iShares (BlackRock)); VB: 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 →SOXX vs VB — FAQ
- How much do SOXX and VB overlap?
- SOXX and VB overlap by approximately 10% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 0 of SOXX's 10 largest holdings are also held by VB. They share 4 of their listed top holdings in total.
- Is it redundant to hold both SOXX and VB?
- Because they have only a small shared core — they mostly hold different things and are largely complementary, holding both is not redundant — each fund covers largely different holdings, so together they broaden your exposure. A 50/50 blend has an effective 77 positions and a A diversification grade.
- What does VB hold that SOXX doesn't?
- VB's largest holdings that SOXX doesn't hold include JBL, RVMD, NTRA, EME, TWLO. Its category is US small-cap, versus SOXX's semiconductors.
- Which is more concentrated, SOXX or VB?
- SOXX's top 10 holdings are 61% of its listed weight; VB's are 27%. The more concentrated fund leans harder on its largest names.