IWF vs SPY: how much do they overlap?
iShares Russell 1000 Growth ETF (IWF) · SPDR S&P 500 ETF Trust (SPY)
overlap by weight · 190 shared holdings
IWF: 387 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
IWF 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 IWF | in SPY |
|---|---|---|---|
| NVIDIA CORPORATION | NVDA | 12.92% | 7.57% |
| APPLE INC. | AAPL | 11.64% | 7.16% |
| MICROSOFT CORPORATION | MSFT | 8.82% | 4.4% |
| AMAZON.COM, INC. | AMZN | 4.66% | 3.73% |
| ALPHABET INC. | GOOGL | 3.54% | 3.24% |
| BROADCOM INC. | AVGO | 4.79% | 2.93% |
| ALPHABET INC. | GOOG | 2.87% | 2.6% |
| META PLATFORMS, INC. | META | 3.46% | 2.14% |
| TESLA, INC. | TSLA | 3.55% | 1.76% |
| ELI LILLY AND COMPANY | LLY | 2.66% | 1.48% |
FAQ
How much do IWF and SPY overlap?
IWF and SPY have a 58% overlap by weight, sharing 190 holdings (out of 387 in IWF and 504 in SPY), based on official issuer holdings as of 2026-03-31.
What does 58% overlap mean?
IWF 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 IWF and SPY both hold?
The largest shared positions are NVIDIA CORPORATION, APPLE INC., MICROSOFT CORPORATION, AMAZON.COM, INC., ALPHABET INC.. The full list of top shared holdings with weights in each fund is shown on this page.