Guardfolio Research · ETF Overlap
VTI vs VOO Overlap: 88.5% of Weight in Shared Holdings
VTI (Vanguard Total Stock Market) and VOO (Vanguard S&P 500) overlap by 88.5% of normalized weight through 502 shared securities, led by NVDA, AAPL, MSFT, AMZN, GOOGL. Here is which positions contribute most and what the result can and cannot say about diversification.
Overlap Summary
Bottom line
VTI and VOO overlap heavily: 88.5% of normalized fund weight is shared across 502 securities. Owning both repeats much of the same exposure, so treat the pair as closely related positions rather than assuming two fund labels create diversification..
The Data
Exactly which securities VTI and VOO share
The table below shows the largest contributors to overlap across the licensed full holdings, with each fund's normalized weight and the lesser weight that counts toward overlap.
| Data basis | Licensed full holdings |
|---|---|
| Fund dates | VTI 2026-08-24; VOO 2026-08-24 |
| Coverage gate | At least 97% retained per fund |
| Holding | VTI weight | VOO weight | Shared (min) |
|---|---|---|---|
| NVIDIA Corp (NVDA) | 6.41% | 7.56% | 6.41% |
| Apple Inc (AAPL) | 6.30% | 7.05% | 6.30% |
| Microsoft Corp (MSFT) | 4.79% | 5.37% | 4.79% |
| Amazon.com Inc (AMZN) | 3.65% | 4.13% | 3.65% |
| Alphabet Inc (GOOGL) | 2.90% | 3.25% | 2.90% |
| Broadcom Inc (AVGO) | 2.56% | 2.87% | 2.56% |
| Alphabet Inc (GOOG) | 2.31% | 2.62% | 2.31% |
| Meta Platforms Inc (META) | 1.70% | 1.90% | 1.70% |
| Eli Lilly & Co (LLY) | 1.35% | 1.41% | 1.35% |
| JPMorgan Chase & Co (JPM) | 1.31% | 1.47% | 1.31% |
| Micron Technology Inc (MU) | 1.29% | 1.44% | 1.29% |
| Berkshire Hathaway Inc (BRK-B) | 1.28% | 1.46% | 1.28% |
| Tesla Inc (TSLA) | 1.22% | 1.36% | 1.22% |
| Advanced Micro Devices Inc (AMD) | 1.08% | 1.21% | 1.08% |
| ExxonMobil Holdings Corp (XOM) | 0.89% | 1.00% | 0.89% |
| Johnson & Johnson (JNJ) | 0.86% | 0.96% | 0.86% |
| Visa Inc (V) | 0.83% | 0.93% | 0.83% |
| Walmart Inc (WMT) | 0.68% | 0.76% | 0.68% |
| Mastercard Inc (MA) | 0.63% | 0.72% | 0.63% |
| AbbVie Inc (ABBV) | 0.62% | 0.69% | 0.62% |
| Total full-holdings overlap | 88.5% | 99.9% | 88.5% |
Showing the 20 largest contributors of 502 shared securities. The total uses every shared security.
The 88.5% figure uses all reported non-cash holdings and sums the lesser normalized weight for each shared security. VTI is dated 2026-08-24 with 99.908% retained coverage; VOO is dated 2026-08-24 with 99.945% retained coverage.
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Sector Picture
VTI vs VOO: sector exposure side by side
Two funds can share few holdings yet still concentrate the same sectors. Here is how the top sectors compare (93.0% combined sector overlap).
| Sector | VTI | VOO |
|---|---|---|
| Technology | 30.9% | 33.1% |
| Financial Services | 13.0% | 12.2% |
| Consumer Discretionary | 10.4% | 10.4% |
| Healthcare | 9.6% | 9.3% |
| Industrials | 9.8% | 8.6% |
| Communication Services | 7.6% | 8.2% |
The Verdict
Should you hold both VTI and VOO?
VTI and VOO overlap heavily: 88.5% of normalized fund weight is shared across 502 securities. Owning both repeats much of the same exposure, so treat the pair as closely related positions rather than assuming two fund labels create diversification.
FAQ
VTI vs VOO overlap: common questions
How much do VTI and VOO overlap?
VTI (Vanguard Total Stock Market) and VOO (Vanguard S&P 500) overlap by approximately 88.5% of normalized weight across their licensed full holdings. They share 502 securities; the largest contributors include NVDA, AAPL, MSFT, AMZN, GOOGL, AVGO, GOOG, META. The separately dated sector reference shows 93.0% overlap.
What stocks do VTI and VOO both hold?
Both VTI and VOO hold NVIDIA Corp (NVDA), Apple Inc (AAPL), Microsoft Corp (MSFT), Amazon (AMZN), Alphabet Inc (GOOGL), Broadcom Inc (AVGO), Alphabet Inc (GOOG), Meta Platforms Inc (META) among their top positions. These shared names account for the 88.5% weight overlap.
Is it worth holding both VTI and VOO?
VTI and VOO overlap heavily: 88.5% of normalized fund weight is shared across 502 securities. Owning both repeats much of the same exposure, so treat the pair as closely related positions rather than assuming two fund labels create diversification.
What is the difference between VTI and VOO?
VTI is a total US market fund (US Total Market, 0.03% expense ratio) and VOO is an S&P 500 fund (US Large-Cap Blend, 0.03% expense ratio). The dataset includes 3485 VTI holdings as of 2026-08-24 and 506 VOO holdings as of 2026-08-24.
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