IWB vs VOO: holdings overlap, shared companies and scores
As of October 28, 2026, IWB and VOO overlap 91.5% by weight. iShares Russell 1000 ETF (IWB): Russell 1000 index. Vanguard S&P 500 ETF (VOO): S&P 500 index.
Updated October 28, 2026
Where IWB and VOO 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.
VOO trades at 24.7 times earnings, against its own median of 22.6, and is more expensive than 63% of its own last 9 years.
What do IWB and VOO each hold?
What's inside IWB: Tech 42%, Magnificent 7 32%.
35% of IWB is its ten largest holdings.
What's inside VOO: Tech 46%, Magnificent 7 35%.
39% of VOO is its ten largest holdings.
How much do IWB and VOO overlap? 91.5% by weight
As of October 28, 2026, IWB and VOO overlap 91.5% by weight.
92% of IWB is already inside VOO.
99% of VOO is already inside IWB.
IWB holds 1,024 companies and VOO holds 504; 497 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 VOO? 6.8 and 7.2 out of 10
As of October 28, 2026, ETF Copilot scores IWB 6.8 out of 10 and VOO 7.2 out of 10.
They differ most on Quality: IWB 8.0 and VOO 8.9.
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 | VOO |
|---|---|---|
| Growth | 7.4 | 8.2 |
| Value | 3.6 | 3.3 |
| Risk | 6.7 | 6.9 |
| Quality | 8.0 | 8.9 |
| Return | 7.7 | 8.1 |
VOO is the cheaper of the two at 0.03% 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, VOO charges 0.03% a year, yields 1.05% and holds $1.7T in assets across 504 positions.
| Measure | IWB | VOO |
|---|---|---|
| Expense ratio | 0.15% | 0.03% |
| Dividend yield | 0.91% | 1.05% |
| Assets under management | $49.0B | $1.7T |
| 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 VOO holdings overlap and scores”, as of October 28, 2026.
https://etf-copilot.com/compare/iwb-vs-voo
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