IWB vs SPY: holdings overlap, shared companies and scores
As of October 28, 2026, IWB and SPY overlap 92.5% by weight. iShares Russell 1000 ETF (IWB): Russell 1000 index. State Street SPDR S&P 500 ETF (SPY): S&P 500 index exposure.
Updated October 28, 2026
Where IWB and SPY trade against their own history
IWB trades at 24.5 times earnings, against its own median of 22.4, and is more expensive than 63% of its own last 9 years.
SPY trades at 24.8 times earnings, against its own median of 22.8, and is more expensive than 62% of its own last 9 years.
What do IWB and SPY each hold?
What's inside IWB: Tech 42%, Magnificent 7 32%.
35% of IWB is its ten largest holdings.
What's inside SPY: Tech 44%, Magnificent 7 34%.
38% of SPY is its ten largest holdings.
How much do IWB and SPY overlap? 92.5% by weight
As of October 28, 2026, IWB and SPY overlap 92.5% by weight.
93% of IWB is already inside SPY.
100% of SPY is already inside IWB.
IWB holds 1,024 companies and SPY holds 504; 498 are in both.
Computed by ETF Copilot from both funds' holdings rather than quoted from a data provider, and rebuilt nightly.
How does ETF Copilot score IWB and SPY? 6.8 and 7.1 out of 10
As of October 28, 2026, ETF Copilot scores IWB 6.8 out of 10 and SPY 7.1 out of 10.
They differ most on Quality: IWB 8.0 and SPY 8.7.
The five factor scores behind them are set out below, 0–10 and higher is better, ranked against every US equity ETF we track.
| Factor | IWB | SPY |
|---|---|---|
| Growth | 7.4 | 7.8 |
| Value | 3.6 | 3.5 |
| Risk | 6.7 | 6.9 |
| Quality | 8.0 | 8.7 |
| Return | 7.7 | 8.0 |
SPY is the cheaper of the two at 0.09% a year
As of October 28, 2026, IWB charges 0.15% a year, yields 0.91% and holds $49.0B in assets across 1024 positions.
As of October 28, 2026, SPY charges 0.09% a year, yields 0.98% and holds $814.8B in assets across 504 positions.
| Measure | IWB | SPY |
|---|---|---|
| Expense ratio | 0.15% | 0.09% |
| Dividend yield | 0.91% | 0.98% |
| Assets under management | $49.0B | $814.8B |
| Holdings | 1024 | 504 |
Expense ratio, dividend yield and assets under management are reported by the fund and refreshed daily. Every other figure on this page is computed by ETF Copilot.
Compare with similar funds
Cite this
ETF Copilot, “IWB vs SPY holdings overlap and scores”, as of October 28, 2026.
https://etf-copilot.com/compare/iwb-vs-spy
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