VGT vs VOO: how much do they really overlap?
VGT (Vanguard Information Technology ETF, tracking the MSCI US IMI Info Tech 25/50) and VOO (Vanguard S&P 500 ETF, tracking the S&P 500) overlap by roughly 51% by weight. 10 of VGT's top 10 holdings also appear in VOO. A 50/50 blend of the two behaves like about 26 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 18 holdings appear in both VGT and VOO. The weight columns show how much of each fund each name represents.
| Holding | in VGT | in VOO |
|---|---|---|
| NVDA NVIDIA Corp. | 16.78% | 7.89% |
| AAPL Apple Inc. | 15.26% | 7.05% |
| MSFT Microsoft Corp. | 9.87% | 5.14% |
| AVGO Broadcom Inc. | 4.49% | 3.26% |
| MU Micron Technology Inc. | 4.19% | 1.68% |
| AMD Advanced Micro Devices Inc. | 3.20% | 1.29% |
| INTC Intel Corp. | 1.95% | 0.83% |
| CSCO Cisco Systems Inc. | 1.85% | 0.73% |
| LRCX Lam Research Corp. | 1.55% | 0.61% |
| ORCL Oracle Corp. | 1.45% | 0.59% |
| AMAT Applied Materials Inc. | 1.39% | 0.55% |
| PLTR Palantir Technologies Inc. Class A | 1.34% | 0.55% |
| TXN Texas Instruments Inc. | 1.10% | 0.43% |
| IBM International Business Machines Corp. | 1.08% | 0.43% |
| QCOM QUALCOMM Inc. | 1.07% | 0.41% |
+ 3 more shared holdings.
Only in VGT
Vanguard Information Technology ETF — US tech sector. Its biggest holdings that VOO doesn’t have:
| ADI Analog Devices Inc. | 0.81% |
| STX Seagate Technology Holdings plc | 0.78% |
| WDC Western Digital Corp. | 0.75% |
| CRWD Crowdstrike Holdings Inc. Class A | 0.74% |
| APH Amphenol Corp. Class A | 0.73% |
| MRVL Marvell Technology Inc. | 0.71% |
| ANET Arista Networks Inc. | 0.69% |
| CRM salesforce.com Inc. | 0.60% |
Only in VOO
Vanguard S&P 500 ETF — US large-cap. Its biggest holdings that VGT doesn’t have:
| AMZN Amazon.com Inc. | 4.07% |
| GOOGL Alphabet Inc. Class A | 3.41% |
| GOOG Alphabet Inc. Class C | 2.71% |
| META Facebook Inc. Class A | 2.13% |
| TSLA Tesla Inc. | 1.89% |
| LLY Eli Lilly & Co. | 1.35% |
| BRK.B Berkshire Hathaway Inc. Class B | 1.34% |
| JPM JPMorgan Chase & Co. | 1.16% |
So — partly overlapping. Should you hold both?
VGT and VOO 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 ~26 effective positions (grade C).
Holdings as of — VGT: May 31, 2026 (Vanguard); VOO: 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 →VGT vs VOO — FAQ
- How much do VGT and VOO overlap?
- VGT and VOO overlap by approximately 51% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 10 of VGT's 10 largest holdings are also held by VOO. They share 18 of their listed top holdings in total.
- Is it redundant to hold both VGT and VOO?
- 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 26 positions and a C diversification grade.
- What does VOO hold that VGT doesn't?
- VOO's largest holdings that VGT doesn't hold include AMZN, GOOGL, GOOG, META, TSLA. Its category is US large-cap, versus VGT's US tech sector.
- Which is more concentrated, VGT or VOO?
- VGT's top 10 holdings are 72% of its listed weight; VOO's are 61%. The more concentrated fund leans harder on its largest names.