IVV vs VOOV: 60% overlap
iShares Core S&P 500 ETF and Vanguard S&P 500 Value ETF share 60.1% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
Different holding dates. These holdings were published 27 days apart — VOOV as of 2026-06-30, the rest through 2026-07-27. Each fund is compared using its most recent file, so any trading in between shows up as a difference.
You would hold two tickers and get the diversification of 1.4. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
IVV and VOOV hold 438 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IVV | in VOOV | Δ |
|---|---|---|---|
| AAPL | 7.7% | 7.3% | 0.4% |
| AMZN | 3.5% | 3.8% | 0.2% |
| TSLA | 1.4% | 1.6% | 0.2% |
| XOM | 1.0% | 2.0% | 0.9% |
| JPM | 1.5% | 0.9% | 0.6% |
| V | 0.9% | 0.9% | 0.1% |
| JNJ | 1.0% | 0.9% | 0.1% |
| WMT | 0.8% | 1.7% | 0.9% |
| ABBV | 0.7% | 0.8% | 0.1% |
| CSCO | 0.7% | 0.8% | 0.0% |
Where IVV and VOOV differ
Sector weights as a share of each fund, ordered by the size of the gap rather than the size of the sector — two funds that overlap heavily still usually diverge somewhere.
| Sector | IVV | VOOV | Δ |
|---|---|---|---|
| Information Technology | 36.7% | 20.5% | +16.2pp |
| Communication Services | 9.5% | 2.9% | +6.6pp |
| Consumer Staples | 4.7% | 8.8% | −4.1pp |
| Energy | 3.3% | 6.6% | −3.3pp |
| Health Care | 9.2% | 12.2% | −3.0pp |
| Financials | 12.6% | 15.3% | −2.7pp |
| Industrials | 8.9% | 11.4% | −2.4pp |
| Utilities | 2.2% | 4.4% | −2.2pp |
Δ is IVV minus VOOV, in percentage points. Sector data is not published by every issuer, so “Unclassified” is a real category rather than a gap in the table.
What each fund holds alone
37.4% of IVV by weight, held in no part of VOOV.
0.0% of VOOV by weight, held in no part of IVV.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| IVV | VOOV | |
|---|---|---|
| Top 10 holdings | 36.7% | 23.8% |
| Positions held | 506 | 438 |
| Cost per $10,000 held, per year | $3 | $7 |
Cost is the expense ratio applied to $10,000; it excludes any brokerage commission, bid-ask spread or tax consequence. Figures are facts about the funds, not a suggestion about which to hold.
Frequently asked
How much do IVV and VOOV overlap?
IVV and VOOV overlap 60.1% by portfolio weight — substantial duplication if you hold both. They share 438 holdings. The figure comes from current issuer holdings files (IVV as of 2026-07-27, VOOV as of 2026-06-30).
How is the overlap between IVV and VOOV calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If IVV holds a stock at 6% and VOOV holds the same stock at 4%, 4% counts as shared. The result is bounded between 0% and 100%, and it is computed after looking through any fund-of-funds to the underlying holdings.
Is it redundant to hold both IVV and VOOV?
That depends on your goals — we state facts, not advice. At 60.1% overlap, each fund still contributes meaningfully distinct exposure.
What does IVV own that VOOV doesn't?
IVV holds 506 positions and VOOV holds 438; 67 of IVV's positions don't appear in VOOV at all, and they are 37.4% of IVV by weight.
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Related comparisons
Sources: issuer holdings files, IVV as of 2026-07-27, VOOV as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.