DIA vs SPY: how much do they overlap?
SPDR Dow Jones Industrial Average ETF Trust (DIA) · SPDR S&P 500 ETF Trust (SPY)
overlap by weight · 30 shared holdings
DIA: 30 holdings (as of 09-Jul-2026) · SPY: 504 holdings (as of 09-Jul-2026)
Low overlap
What this means
DIA and SPY hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Overlap by weight sums the smaller of the two funds' weights for every stock they both hold — it answers "how much of my money is in the same stocks either way?" See methodology.
Top shared holdings
| Company | Ticker | in DIA | in SPY |
|---|---|---|---|
| Microsoft Corp | MSFT | 4.35% | 4.4% |
| Apple Inc | AAPL | 3.58% | 7.16% |
| Alphabet Inc Cl A | GOOGL | 4.06% | 3.24% |
| Amazon.Com Inc | AMZN | 2.8% | 3.73% |
| Nvidia Corp | NVDA | 2.29% | 7.57% |
| Jpmorgan Chase + Co | JPM | 3.8% | 1.39% |
| Johnson + Johnson | JNJ | 2.93% | 0.96% |
| Visa Inc Class A Shares | V | 3.94% | 0.89% |
| Walmart Inc | WMT | 1.27% | 0.76% |
| Cisco Systems Inc | CSCO | 1.34% | 0.72% |
FAQ
How much do DIA and SPY overlap?
DIA and SPY have a 27.8% overlap by weight, sharing 30 holdings (out of 30 in DIA and 504 in SPY), based on official issuer holdings as of 09-Jul-2026.
What does 27.8% overlap mean?
DIA and SPY hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Which stocks do DIA and SPY both hold?
The largest shared positions are Microsoft Corp, Apple Inc, Alphabet Inc Cl A, Amazon.Com Inc, Nvidia Corp. The full list of top shared holdings with weights in each fund is shown on this page.