SOXX vs VOOG: how much do they really overlap?
SOXX (iShares Semiconductor ETF, tracking the NYSE Semiconductor) and VOOG (Vanguard S&P 500 Growth ETF, tracking the S&P 500 Growth) overlap by roughly 28% by weight. 7 of SOXX's top 10 holdings also appear in VOOG. A 50/50 blend of the two behaves like about 28 equally-weighted bets (diversification grade C). 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 8 holdings appear in both SOXX and VOOG. The weight columns show how much of each fund each name represents.
| Holding | in SOXX | in VOOG |
|---|---|---|
| NVDA NVIDIA CORP | 8.42% | 13.64% |
| AVGO BROADCOM INC | 7.91% | 5.03% |
| MU MICRON TECHNOLOGY INC | 8.21% | 3.66% |
| AMD ADVANCED MICRO DEVICES INC | 8.57% | 2.67% |
| AMAT APPLIED MATERIAL INC | 5.08% | 1.62% |
| LRCX LAM RESEARCH CORP | 4.27% | 1.53% |
| KLAC KLA CORP | 4.28% | 1.11% |
| MRVL MARVELL TECHNOLOGY INC | 4.08% | 0.35% |
Only in SOXX
iShares Semiconductor ETF — semiconductors. Its biggest holdings that VOOG doesn’t have:
| INTC INTEL CORPORATION | 5.24% |
| TSM TAIWAN SEMICONDUCTOR MANUFACTURING | 4.57% |
| TXN TEXAS INSTRUMENT INC | 4.16% |
| ADI ANALOG DEVICES INC | 4.04% |
| MPWR MONOLITHIC POWER SYSTEMS INC | 3.54% |
| NXPI NXP SEMICONDUCTORS NV | 3.48% |
| TER TERADYNE INC | 3.22% |
| QCOM QUALCOMM INC | 2.75% |
Only in VOOG
Vanguard S&P 500 Growth ETF — US large-cap growth. Its biggest holdings that SOXX doesn’t have:
| MSFT Microsoft Corp. | 7.80% |
| AAPL Apple Inc. | 5.98% |
| GOOGL Alphabet Inc. Class A | 5.90% |
| GOOG Alphabet Inc. Class C | 4.70% |
| META Facebook Inc. Class A | 3.48% |
| AMZN Amazon.com Inc. | 3.48% |
| LLY Eli Lilly & Co. | 2.67% |
| BRK.B Berkshire Hathaway Inc. Class B | 2.58% |
So — partly overlapping. Should you hold both?
SOXX and VOOG 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 ~28 effective positions (grade C).
Holdings as of — SOXX: Jul 30, 2026 (iShares (BlackRock)); VOOG: 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 VOOG — FAQ
- How much do SOXX and VOOG overlap?
- SOXX and VOOG overlap by approximately 28% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 7 of SOXX's 10 largest holdings are also held by VOOG. They share 8 of their listed top holdings in total.
- Is it redundant to hold both SOXX and VOOG?
- 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 28 positions and a C diversification grade.
- What does VOOG hold that SOXX doesn't?
- VOOG's largest holdings that SOXX doesn't hold include MSFT, AAPL, GOOGL, GOOG, META. Its category is US large-cap growth, versus SOXX's semiconductors.
- Which is more concentrated, SOXX or VOOG?
- SOXX's top 10 holdings are 61% of its listed weight; VOOG's are 64%. The more concentrated fund leans harder on its largest names.