VFIAX vs VOOV: 59% overlap
Vanguard 500 Index Admiral and Vanguard S&P 500 Value ETF share 58.8% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
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
VFIAX and VOOV hold 438 of the same securities. The ten contributing most to the overlap figure:
| Holding | in VFIAX | in VOOV | Δ |
|---|---|---|---|
| AAPL | 6.6% | 7.3% | 0.7% |
| AMZN | 3.6% | 3.8% | 0.2% |
| TSLA | 1.8% | 1.6% | 0.3% |
| INTC | 1.0% | 2.3% | 1.3% |
| JPM | 1.3% | 0.9% | 0.4% |
| XOM | 0.9% | 2.0% | 1.1% |
| V | 0.9% | 0.9% | 0.0% |
| JNJ | 0.9% | 0.9% | 0.1% |
| WMT | 0.8% | 1.7% | 0.9% |
| CSCO | 0.7% | 0.8% | 0.0% |
Where VFIAX 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 | VFIAX | VOOV | Δ |
|---|---|---|---|
| Information Technology | 38.0% | 20.5% | +17.5pp |
| Communication Services | 9.7% | 2.9% | +6.8pp |
| Consumer Staples | 4.6% | 8.8% | −4.3pp |
| Financials | 11.6% | 15.3% | −3.7pp |
| Energy | 3.0% | 6.6% | −3.6pp |
| Health Care | 8.9% | 12.2% | −3.3pp |
| Industrials | 8.9% | 11.4% | −2.4pp |
| Utilities | 2.2% | 4.4% | −2.3pp |
Δ is VFIAX 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
39.4% of VFIAX by weight, held in no part of VOOV.
0.0% of VOOV by weight, held in no part of VFIAX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| VFIAX | VOOV | |
|---|---|---|
| Top 10 holdings | 36.4% | 23.8% |
| Positions held | 505 | 438 |
| Cost per $10,000 held, per year | $4 | $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 VFIAX and VOOV overlap?
VFIAX and VOOV overlap 58.8% by portfolio weight — substantial duplication if you hold both. They share 438 holdings. The figure comes from current issuer holdings files (VFIAX as of 2026-06-30, VOOV as of 2026-06-30).
How is the overlap between VFIAX and VOOV calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If VFIAX 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 VFIAX and VOOV?
That depends on your goals — we state facts, not advice. At 58.8% overlap, each fund still contributes meaningfully distinct exposure.
What does VFIAX own that VOOV doesn't?
VFIAX holds 505 positions and VOOV holds 438; 67 of VFIAX's positions don't appear in VOOV at all, and they are 39.4% of VFIAX by weight.
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Related comparisons
Sources: issuer holdings files, VFIAX as of 2026-06-30, VOOV as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.