DIA vs VOOV: 22% overlap
SPDR Dow Jones Industrial Average ETF and Vanguard S&P 500 Value ETF share 21.7% 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 1.8. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
DIA and VOOV hold 26 of the same securities. The ten contributing most to the overlap figure:
| Holding | in DIA | in VOOV | Δ |
|---|---|---|---|
| AAPL | 3.8% | 7.3% | 3.5% |
| AMZN | 2.6% | 3.8% | 1.1% |
| UNH | 4.8% | 1.3% | 3.5% |
| WMT | 1.3% | 1.7% | 0.4% |
| HD | 3.8% | 1.2% | 2.6% |
| PG | 1.7% | 1.2% | 0.5% |
| MRK | 1.5% | 1.1% | 0.4% |
| CVX | 2.2% | 1.1% | 1.1% |
| JPM | 4.1% | 0.9% | 3.2% |
| V | 4.1% | 0.9% | 3.2% |
Where DIA 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 | DIA | VOOV | Δ |
|---|---|---|---|
| Financials | 28.4% | 15.3% | +13.1pp |
| Industrials | 17.2% | 11.4% | +5.8pp |
| Consumer Staples | 3.9% | 8.8% | −4.9pp |
| Energy | 2.2% | 6.6% | −4.5pp |
| Utilities | 0.0% | 4.4% | −4.4pp |
| Information Technology | 16.2% | 20.5% | −4.3pp |
| Real Estate | 0.0% | 3.3% | −3.3pp |
| Communication Services | 4.8% | 2.9% | +1.9pp |
Δ is DIA 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
20.3% of DIA by weight, held in no part of VOOV.
73.2% of VOOV by weight, held in no part of DIA.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| DIA | VOOV | |
|---|---|---|
| Top 10 holdings | 55.6% | 23.8% |
| Positions held | 31 | 438 |
| Cost per $10,000 held, per year | $16 | $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 DIA and VOOV overlap?
DIA and VOOV overlap 21.7% by portfolio weight — moderate overlap. They share 26 holdings. The figure comes from current issuer holdings files (DIA as of 2026-07-27, VOOV as of 2026-06-30).
How is the overlap between DIA and VOOV calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If DIA 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 DIA and VOOV?
That depends on your goals — we state facts, not advice. At 21.7% overlap, each fund still contributes meaningfully distinct exposure.
What does DIA own that VOOV doesn't?
DIA holds 31 positions and VOOV holds 438; 4 of DIA's positions don't appear in VOOV at all, and they are 20.3% of DIA by weight.
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Related comparisons
Sources: issuer holdings files, DIA as of 2026-07-27, VOOV as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.