Guardfolio Research · ETF Overlap
IVV vs VOO Overlap: 38.4% of Weight in Shared Holdings
IVV (iShares Core S&P 500) and VOO (Vanguard S&P 500) track the same index, so they hold the same stocks in nearly the same weights — 38.4% top-10 overlap. The decision between them comes down to fees and structure, not holdings.
Overlap Summary
Bottom line
IVV and VOO track the same underlying index, so their holdings are essentially identical (38.4% by top-10 weight). Holding both adds no diversification — the only real differences are the expense ratio (0.03% vs 0.03%), issuer, and trading liquidity.
The Data
Exactly which stocks IVV and VOO share
The table below shows every holding that appears in both funds' top 10, with each fund's weight and the shared (minimum) weight that counts toward overlap.
| Holding | IVV weight | VOO weight | Shared (min) |
|---|---|---|---|
| NVIDIA Corp. (NVDA) | 7.84% | 7.84% | 7.84% |
| Apple Inc. (AAPL) | 6.44% | 6.44% | 6.44% |
| Microsoft Corp. (MSFT) | 4.89% | 4.89% | 4.89% |
| Amazon.com, Inc. (AMZN) | 4.19% | 4.19% | 4.19% |
| Alphabet Inc. (GOOGL) | 3.62% | 3.62% | 3.62% |
| Broadcom Inc. (AVGO) | 3.20% | 3.20% | 3.20% |
| Alphabet Inc. (GOOG) | 2.89% | 2.89% | 2.89% |
| Meta Platforms, Inc. (META) | 2.16% | 2.16% | 2.16% |
| Tesla, Inc. (TSLA) | 1.74% | 1.74% | 1.74% |
| Berkshire Hathaway Inc. (BRK.B) | 1.40% | 1.40% | 1.40% |
| Total shared top-10 weight | 38.4% | 38.4% | 38.4% |
Weights are approximate, based on the most recent quarterly holdings. The 38.4% figure is the sum of the lesser of each fund's weight per shared holding (the conservative top-10 method).
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Sector Picture
IVV 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 (97.0% combined sector overlap).
| Sector | IVV | VOO |
|---|---|---|
| Technology | 33.1% | 33.1% |
| Financial Services | 12.2% | 12.2% |
| Consumer Discretionary | 10.4% | 10.4% |
| Healthcare | 9.3% | 9.3% |
| Industrials | 8.6% | 8.6% |
| Communication Services | 8.2% | 8.2% |
The Verdict
Should you hold both IVV and VOO?
IVV and VOO track the same underlying index, so their holdings are essentially identical (38.4% by top-10 weight). Holding both adds no diversification — the only real differences are the expense ratio (0.03% vs 0.03%), issuer, and trading liquidity. Most investors should pick one and consolidate.
FAQ
IVV vs VOO overlap: common questions
How much do IVV and VOO overlap?
IVV (iShares Core S&P 500) and VOO (Vanguard S&P 500) overlap by approximately 38.4% of weight based on their top-10 holdings, with 97.0% sector overlap. They share 10 top-10 holdings: NVDA, AAPL, MSFT, AMZN, GOOGL, AVGO, GOOG, META, TSLA, BRK.B.
What stocks do IVV and VOO both hold?
Both IVV 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 (META) among their top positions. These shared names account for the 38.4% weight overlap.
Is it worth holding both IVV and VOO?
IVV and VOO track the same underlying index, so their holdings are essentially identical (38.4% by top-10 weight). Holding both adds no diversification — the only real differences are the expense ratio (0.03% vs 0.03%), issuer, and trading liquidity. Most investors should pick one and consolidate.
What is the difference between IVV and VOO?
IVV is an S&P 500 fund (US Large-Cap Blend, 0.03% expense ratio) and VOO is an S&P 500 fund (US Large-Cap Blend, 0.03% expense ratio). IVV's top 10 is 38.4% of the fund; VOO's is 38.4%.
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