IWD vs SPY: how much do they overlap?
iShares Russell 1000 Value ETF (IWD) · SPDR S&P 500 ETF Trust (SPY)
overlap by weight · 419 shared holdings
IWD: 866 holdings (as of 2026-03-31) · SPY: 504 holdings (as of 09-Jul-2026)
Note: the two funds' latest official filings have different dates, which can understate overlap slightly for funds tracking similar indexes.
Moderate overlap
What this means
IWD and SPY share a meaningful slice of holdings. They are related but not interchangeable; check the shared names below to see where your exposure doubles up.
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 IWD | in SPY |
|---|---|---|---|
| ALPHABET INC. | GOOGL | 1.95% | 3.24% |
| AMAZON.COM, INC. | AMZN | 1.81% | 3.73% |
| ALPHABET INC. | GOOG | 1.59% | 2.6% |
| BERKSHIRE HATHAWAY INC. | BRK.B | 2.91% | 1.4% |
| JPMORGAN CHASE & CO. | JPM | 2.63% | 1.39% |
| MICRON TECHNOLOGY, INC. | MU | 1.24% | 1.72% |
| JOHNSON & JOHNSON | JNJ | 1.94% | 0.96% |
| WALMART INC. | WMT | 1.6% | 0.76% |
| META PLATFORMS, INC. | META | 0.73% | 2.14% |
| CISCO SYSTEMS, INC. | CSCO | 1.02% | 0.72% |
FAQ
How much do IWD and SPY overlap?
IWD and SPY have a 51% overlap by weight, sharing 419 holdings (out of 866 in IWD and 504 in SPY), based on official issuer holdings as of 2026-03-31.
What does 51% overlap mean?
IWD and SPY share a meaningful slice of holdings. They are related but not interchangeable; check the shared names below to see where your exposure doubles up.
Which stocks do IWD and SPY both hold?
The largest shared positions are ALPHABET INC., AMAZON.COM, INC., ALPHABET INC., BERKSHIRE HATHAWAY INC., JPMORGAN CHASE & CO.. The full list of top shared holdings with weights in each fund is shown on this page.