VGT vs VO: how much do they really overlap?
VGT (Vanguard Information Technology ETF, tracking the MSCI US IMI Info Tech 25/50) and VO (Vanguard Mid-Cap ETF, tracking the CRSP US Mid Cap) overlap by roughly 15% by weight. 0 of VGT's top 10 holdings also appear in VO. A 50/50 blend of the two behaves like about 55 equally-weighted bets (diversification grade B). 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 12 holdings appear in both VGT and VO. The weight columns show how much of each fund each name represents.
| Holding | in VGT | in VO |
|---|---|---|
| STX Seagate Technology Holdings plc | 0.78% | 1.90% |
| WDC Western Digital Corp. | 0.75% | 1.78% |
| MRVL Marvell Technology Inc. | 0.71% | 0.89% |
| GLW Corning Inc. | 0.59% | 0.69% |
| DDOG Datadog Inc. Class A | 0.34% | 0.80% |
| NET Cloudflare Inc. Class A | 0.34% | 0.72% |
| MPWR Monolithic Power Systems Inc. | 0.32% | 0.72% |
| MSI Motorola Solutions Inc. | 0.30% | 0.66% |
| TEL TE Connectivity plc | 0.28% | 0.62% |
| HPE Hewlett Packard Enterprise Co. | 0.28% | 0.57% |
| TER Teradyne Inc. | 0.27% | 0.58% |
| KEYS Keysight Technologies Inc. | 0.26% | 0.58% |
Only in VGT
Vanguard Information Technology ETF — US tech sector. Its biggest holdings that VO doesn’t have:
| NVDA NVIDIA Corp. | 16.78% |
| AAPL Apple Inc. | 15.26% |
| MSFT Microsoft Corp. | 9.87% |
| 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% |
Only in VO
Vanguard Mid-Cap ETF — US mid-cap. Its biggest holdings that VGT doesn’t have:
| VRT Vertiv Holdings Co. Class A | 1.18% |
| PWR Quanta Services Inc. | 1.06% |
| HWM Howmet Aerospace Inc. | 1.03% |
| CMI Cummins Inc. | 0.89% |
| CEG Constellation Energy Corp. | 0.88% |
| SLB Schlumberger Ltd. | 0.81% |
| GM General Motors Co. | 0.75% |
| ROST Ross Stores Inc. | 0.74% |
So — mostly different. Should you hold both?
VGT and VO 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 ~55 effective positions (grade B), because they hold largely different securities.
Holdings as of — VGT: May 31, 2026 (Vanguard); VO: 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 VO — FAQ
- How much do VGT and VO overlap?
- VGT and VO overlap by approximately 15% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 0 of VGT's 10 largest holdings are also held by VO. They share 12 of their listed top holdings in total.
- Is it redundant to hold both VGT and VO?
- 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 55 positions and a B diversification grade.
- What does VO hold that VGT doesn't?
- VO's largest holdings that VGT doesn't hold include VRT, PWR, HWM, CMI, CEG. Its category is US mid-cap, versus VGT's US tech sector.
- Which is more concentrated, VGT or VO?
- VGT's top 10 holdings are 72% of its listed weight; VO's are 31%. The more concentrated fund leans harder on its largest names.