IWB vs OEF: holdings overlap, shared companies and scores
As of September 11, 2026, IWB and OEF overlap 67.6% by weight. iShares Russell 1000 ETF (IWB): Russell 1000 index. iShares S&P 100 ETF (OEF): Top 100 U.S. stocks.
Updated September 11, 2026
How much do IWB and OEF overlap?
As of September 11, 2026, IWB and OEF overlap 67.6% by weight.
68% of IWB is already inside OEF.
100% of OEF is already inside IWB.
IWB holds 1,020 companies and OEF holds 104; 103 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 OEF?
As of September 11, 2026, ETF Copilot scores IWB 5.3 out of 10 and OEF 5.4 out of 10.
They differ most on Quality: IWB 8.2 and OEF 9.6.
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 | OEF |
|---|---|---|
| Growth | 3.2 | 1.8 |
| Valuation | 2.8 | 2.6 |
| Risk | 4.9 | 4.8 |
| Quality | 8.2 | 9.6 |
| Return | 7.4 | 8.3 |
IWB is the cheaper of the two at 0.15% a year
As of September 11, 2026, IWB charges 0.15% a year, yields 1.10% and holds $49.4B in assets across 1020 positions.
As of September 11, 2026, OEF charges 0.20% a year, yields 0.95% and holds $20.5B in assets across 104 positions.
| Measure | IWB | OEF |
|---|---|---|
| Expense ratio | 0.15% | 0.20% |
| Dividend yield | 1.10% | 0.95% |
| Assets under management | $49.4B | $20.5B |
| Holdings | 1020 | 104 |
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.
Where IWB and OEF trade against their own history
IWB trades at 25.0 times earnings, against its own median of 21.3, and is more expensive than 83% of its own 114 monthly readings since 2017.
OEF trades at 26.1 times earnings, against its own median of 22.1, and is more expensive than 86% of its own 114 monthly readings since 2017.
What moved IWB and OEF this week
IWB fell 1.2% in the week to September 11, 2026. The holdings that moved it most were Nvidia (−4.4%), Microsoft (−2.8%) and Eli Lilly (−3.8%); Advanced Micro Devices (+13.1%) pushed the other way.
OEF fell 1.0% in the week to September 11, 2026. The holdings that moved it most were Nvidia (−4.4%), Microsoft (−2.8%) and Eli Lilly (−3.8%); Advanced Micro Devices (+13.1%) pushed the other way.
What do IWB and OEF each hold?
What's inside IWB: Tech 44%, Magnificent 7 31%.
35% of IWB is its ten largest holdings.
What's inside OEF: Tech 55%, Magnificent 7 47%.
52% of OEF is its ten largest holdings.
Compare with similar funds
Cite this
ETF Copilot, “IWB vs OEF holdings overlap and scores”, as of September 11, 2026.
https://etf-copilot.com/compare/iwb-vs-oef
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