DIA vs VGT: how much do they really overlap?
DIA (SPDR Dow Jones Industrial Average ETF, tracking the Dow Jones Industrial Average) and VGT (Vanguard Information Technology ETF, tracking the MSCI US IMI Info Tech 25/50) overlap by roughly 13% by weight. 1 of DIA's top 10 holdings also appear in VGT. A 50/50 blend of the two behaves like about 27 equally-weighted bets (diversification grade C). 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 5 holdings appear in both DIA and VGT. The weight columns show how much of each fund each name represents.
| Holding | in DIA | in VGT |
|---|---|---|
| MSFT Microsoft Corporation | 4.20% | 9.87% |
| AAPL Apple Inc. | 3.21% | 15.26% |
| NVDA NVIDIA Corporation | 2.22% | 16.78% |
| IBM International Business Machines Corporation | 3.16% | 1.08% |
| CRM Salesforce, Inc. | 1.80% | 0.60% |
Only in DIA
SPDR Dow Jones Industrial Average ETF — US blue-chip (Dow 30). Its biggest holdings that VGT doesn’t have:
| CAT Caterpillar Inc. | 11.76% |
| GS The Goldman Sachs Group, Inc. | 11.61% |
| UNH UnitedHealth Group Incorporated | 4.78% |
| AMGN Amgen Inc. | 4.10% |
| GOOGL Alphabet Inc. | 4.03% |
| HD The Home Depot, Inc. | 3.99% |
| SHW The Sherwin-Williams Company | 3.92% |
| V Visa Inc. | 3.89% |
Only in VGT
Vanguard Information Technology ETF — US tech sector. Its biggest holdings that DIA doesn’t have:
| AVGO Broadcom Inc. | 4.49% |
| MU Micron Technology Inc. | 4.19% |
| AMD Advanced Micro Devices Inc. | 3.20% |
| INTC Intel Corp. | 1.95% |
| CSCO Cisco Systems Inc. | 1.85% |
| LRCX Lam Research Corp. | 1.55% |
| ORCL Oracle Corp. | 1.45% |
| AMAT Applied Materials Inc. | 1.39% |
So — mostly different. Should you hold both?
DIA and VGT 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 ~27 effective positions (grade C), because they hold largely different securities.
Holdings as of — DIA: Jun 29, 2026 (State Street Global Advisors); VGT: 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 →DIA vs VGT — FAQ
- How much do DIA and VGT overlap?
- DIA and VGT overlap by approximately 13% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 1 of DIA's 10 largest holdings are also held by VGT. They share 5 of their listed top holdings in total.
- Is it redundant to hold both DIA and VGT?
- 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 27 positions and a C diversification grade.
- What does VGT hold that DIA doesn't?
- VGT's largest holdings that DIA doesn't hold include AVGO, MU, AMD, INTC, CSCO. Its category is US tech sector, versus DIA's US blue-chip (Dow 30).
- Which is more concentrated, DIA or VGT?
- DIA's top 10 holdings are 59% of its listed weight; VGT's are 72%. The more concentrated fund leans harder on its largest names.