SOXX vs VTI: how much do they really overlap?
SOXX (iShares Semiconductor ETF, tracking the NYSE Semiconductor) and VTI (Vanguard Total Stock Market ETF, tracking the CRSP US Total Market) overlap by roughly 27% by weight. 8 of SOXX's top 10 holdings also appear in VTI. A 50/50 blend of the two behaves like about 47 equally-weighted bets (diversification grade B). 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 10 holdings appear in both SOXX and VTI. The weight columns show how much of each fund each name represents.
| Holding | in SOXX | in VTI |
|---|---|---|
| NVDA NVIDIA CORP | 6.81% | 6.70% |
| AVGO BROADCOM INC | 6.08% | 2.91% |
| MU MICRON TECHNOLOGY INC | 8.54% | 1.50% |
| AMD ADVANCED MICRO DEVICES INC | 8.09% | 1.16% |
| INTC INTEL CORPORATION | 6.33% | 0.63% |
| LRCX LAM RESEARCH CORP | 4.89% | 0.55% |
| AMAT APPLIED MATERIAL INC | 5.77% | 0.49% |
| TXN TEXAS INSTRUMENT INC | 3.50% | 0.38% |
| QCOM QUALCOMM INC | 2.65% | 0.37% |
| KLAC KLA CORP | 5.64% | 0.35% |
Only in SOXX
iShares Semiconductor ETF — semiconductors. Its biggest holdings that VTI doesn’t have:
| MRVL MARVELL TECHNOLOGY INC | 4.88% |
| TSM TAIWAN SEMICONDUCTOR MANUFACTURING | 4.26% |
| ADI ANALOG DEVICES INC | 3.45% |
| TER TERADYNE INC | 3.36% |
| NXPI NXP SEMICONDUCTORS NV | 3.14% |
| ALAB ASTERA LABS INC | 3.02% |
| MPWR MONOLITHIC POWER SYSTEMS INC | 2.93% |
| ASML ASML HOLDING ADR REPRESENTING NV | 2.30% |
Only in VTI
Vanguard Total Stock Market ETF — total US market. Its biggest holdings that SOXX doesn’t have:
| AAPL Apple Inc. | 6.30% |
| MSFT Microsoft Corp. | 4.60% |
| AMZN Amazon.com Inc. | 3.60% |
| GOOGL Alphabet Inc. Class A | 3.05% |
| GOOG Alphabet Inc. Class C | 2.39% |
| META Facebook Inc. Class A | 1.90% |
| TSLA Tesla Inc. | 1.69% |
| LLY Eli Lilly & Co. | 1.29% |
So — partly overlapping. Should you hold both?
SOXX and VTI 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 ~47 effective positions (grade B).
Holdings as of — SOXX: Jun 30, 2026 (iShares (BlackRock)); VTI: 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 →SOXX vs VTI — FAQ
- How much do SOXX and VTI overlap?
- SOXX and VTI overlap by approximately 27% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 8 of SOXX's 10 largest holdings are also held by VTI. They share 10 of their listed top holdings in total.
- Is it redundant to hold both SOXX and VTI?
- 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 (NVDA) while each fund still adds distinct exposure. A 50/50 blend has an effective 47 positions and a B diversification grade.
- What does VTI hold that SOXX doesn't?
- VTI's largest holdings that SOXX doesn't hold include AAPL, MSFT, AMZN, GOOGL, GOOG. Its category is total US market, versus SOXX's semiconductors.
- Which is more concentrated, SOXX or VTI?
- SOXX's top 10 holdings are 61% of its listed weight; VTI's are 61%. The more concentrated fund leans harder on its largest names.