DIA vs SPY: ETF overlap
Holdings as of June 30, 2026 · SEC fund filings · DIA source document · SPY source document
These two funds publish on different dates: DIA as of July 31, 2026, SPY as of June 30, 2026. The overlap figure is stated as of the older of the two, June 30, 2026 — holdings may have changed in the fund with the fresher date since then.
Overlap by weight: for each stock both funds hold, take the smaller of its two weights, then add those up. 28% means about 28 cents of every dollar in one fund is invested in the same companies, at the same size, as the other. The overlap level is PortLens's grouping of that figure, not an industry standard. What is ETF overlap?
DIA and SPY hold 30 of the same stocks, overlapping by 28.0% of portfolio weight — meaningful common ground, mostly in the largest index names, but each fund also brings exposure the other lacks. Whether the pairing helps depends on what the rest of your portfolio already holds. The largest shared position is Microsoft Corp (MSFT), at 5.3% of DIA and 4.3% of SPY.
Top shared holdings
| Company | Ticker | % of DIA | % of SPY |
|---|---|---|---|
| Microsoft Corp | MSFT | 5.26% | 4.30% |
| Apple Inc | AAPL | 3.50% | 6.59% |
| Alphabet Inc | GOOGL | 4.03% | 3.25% |
| Amazon.com Inc | AMZN | 3.07% | 3.62% |
| NVIDIA Corp | NVDA | 2.27% | 7.52% |
| JPMorgan Chase & Co | JPM | 3.98% | 1.36% |
| Johnson & Johnson | JNJ | 2.90% | 0.95% |
| Visa Inc | V | 4.14% | 0.88% |
| Walmart Inc | WMT | 1.26% | 0.77% |
| Caterpillar Inc | CAT | 9.22% | 0.76% |
Where the funds tilt differently
| Sector | DIA | SPY | Difference |
|---|---|---|---|
| Technology | 14.2% | 48.3% | -34.1% SPY |
| Financial Services | 30.2% | 9.9% | +20.3% DIA |
| Industrials | 15.0% | 5.4% | +9.6% DIA |
| Communication Services | 5.2% | 14.3% | -9.1% SPY |
| Healthcare | 9.8% | 2.9% | +6.9% DIA |
| Basic Materials | 5.0% | 0.7% | +4.3% DIA |
Fund facts
| DIA | SPY | |
|---|---|---|
| Fund | State Street SPDR Dow Jones Industrial Average ETF Trust | State Street SPDR S&P 500 ETF |
| Style | Blend | Growth |
| Assets | — | $813.8B |
| Beta | 0.82 | 1.01 |
| Top sectors | Financial Services 30%, Industrials 15%, Technology 14% | Technology 48%, Communication Services 14%, Consumer Cyclical 11% |
Computed from 30 listed holdings of DIA (100% of the fund) and 503 of SPY ( 100%). How this is computed: methodology. Informational only, not investment advice — see disclosures.
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