Guardfolio Research · ETF Overlap
IVV vs VOO Overlap: 95.6% of Weight in Shared Holdings
IVV (iShares Core S&P 500) and VOO (Vanguard S&P 500) track the same index and overlap by 95.6% across their licensed full holdings. The decision between them comes down largely to fees, structure, issuer, and liquidity.
Overlap Summary
Bottom line
IVV and VOO track the same underlying index, so their licensed full-holdings overlap is 95.6%. Holding both adds little diversification.
The Data
Exactly which securities IVV 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 | IVV 2026-08-24; VOO 2026-08-24 |
| Coverage gate | At least 97% retained per fund |
| Holding | IVV weight | VOO weight | Shared (min) |
|---|---|---|---|
| NVIDIA (NVDA) | 7.87% | 7.56% | 7.56% |
| APPLE (AAPL) | 6.87% | 7.05% | 6.87% |
| MICROSOFT (MSFT) | 5.43% | 5.37% | 5.37% |
| AMAZON.COM INC (AMZN) | 3.83% | 4.13% | 3.83% |
| ALPHABET CLASS A (GOOGL) | 3.06% | 3.25% | 3.06% |
| BROADCOM INC (AVGO) | 2.64% | 2.87% | 2.64% |
| ALPHABET CLASS C (GOOG) | 2.44% | 2.62% | 2.44% |
| META PLATFORMS CLASS A (META) | 1.83% | 1.90% | 1.83% |
| MICRON TECHNOLOGY (MU) | 1.65% | 1.44% | 1.44% |
| JPMORGAN CHASE & CO (JPM) | 1.43% | 1.47% | 1.43% |
| ELI LILLY (LLY) | 1.50% | 1.41% | 1.41% |
| BERKSHIRE HATHAWAY INC CLASS B (BRK-B) | 1.38% | 1.46% | 1.38% |
| TESLA INC (TSLA) | 1.55% | 1.36% | 1.36% |
| ADVANCED MICRO DEVICES (AMD) | 1.17% | 1.21% | 1.17% |
| EXXONMOBIL HOLDINGS CORP (XOM) | 1.04% | 1.00% | 1.00% |
| JOHNSON & JOHNSON (JNJ) | 0.98% | 0.96% | 0.96% |
| VISA CLASS A (V) | 0.93% | 0.93% | 0.93% |
| MASTERCARD CLASS A (MA) | 0.71% | 0.72% | 0.71% |
| ABBVIE (ABBV) | 0.71% | 0.69% | 0.69% |
| WALMART INC (WMT) | 0.69% | 0.76% | 0.69% |
| Total full-holdings overlap | 98.3% | 98.4% | 95.6% |
Showing the 20 largest contributors of 490 shared securities. The total uses every shared security.
The 95.6% figure uses all reported non-cash holdings and sums the lesser normalized weight for each shared security. IVV is dated 2026-08-24 with 99.91% retained coverage; VOO is dated 2026-08-24 with 99.945% retained coverage.
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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 licensed full-holdings overlap is 95.6%. Holding both adds little diversification. The main differences are the expense ratio (0.03% vs 0.03%), issuer, structure, and trading liquidity.
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 95.6% of normalized weight across their licensed full holdings. They share 490 securities; the largest contributors include NVDA, AAPL, MSFT, AMZN, GOOGL, AVGO, GOOG, META. The separately dated sector reference shows 97.0% overlap.
What stocks do IVV and VOO both hold?
Both IVV and VOO hold NVIDIA (NVDA), APPLE (AAPL), MICROSOFT (MSFT), AMAZON (AMZN), ALPHABET CLASS A (GOOGL), BROADCOM INC (AVGO), ALPHABET CLASS C (GOOG), META PLATFORMS CLASS A (META) among their top positions. These shared names account for the 95.6% weight overlap.
Is it worth holding both IVV and VOO?
IVV and VOO track the same underlying index, so their licensed full-holdings overlap is 95.6%. Holding both adds little diversification. The main differences are the expense ratio (0.03% vs 0.03%), issuer, structure, and trading liquidity.
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). The dataset includes 505 IVV holdings as of 2026-08-24 and 506 VOO holdings as of 2026-08-24.
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