OEF vs VOO: holdings overlap, shared companies and scores
As of October 28, 2026, OEF and VOO overlap 74.2% by weight. iShares S&P 100 ETF (OEF): Top 100 U.S. stocks. Vanguard S&P 500 ETF (VOO): S&P 500 index.
Updated October 28, 2026
Where OEF and VOO trade against their own history
OEF trades at 25.6 times earnings, against its own median of 23.7, and is more expensive than 68% 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 OEF and VOO each hold?
What's inside OEF: Tech 52%, Magnificent 7 46%.
52% of OEF 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 OEF and VOO overlap? 74.2% by weight
As of October 28, 2026, OEF and VOO overlap 74.2% by weight.
100% of OEF is already inside VOO.
74% of VOO is already inside OEF.
OEF holds 104 companies and VOO holds 504; 101 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 OEF and VOO? 7.3 and 7.2 out of 10
As of October 28, 2026, ETF Copilot scores OEF 7.3 out of 10 and VOO 7.2 out of 10.
They differ most on Risk: OEF 5.6 and VOO 6.9.
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 | OEF | VOO |
|---|---|---|
| Growth | 8.5 | 8.2 |
| Value | 3.4 | 3.3 |
| Risk | 5.6 | 6.9 |
| Quality | 9.6 | 8.9 |
| Return | 8.4 | 8.1 |
VOO is the cheaper of the two at 0.03% a year
As of October 28, 2026, OEF charges 0.20% a year, yields 0.85% and holds $20.5B in assets across 104 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 | OEF | VOO |
|---|---|---|
| Expense ratio | 0.20% | 0.03% |
| Dividend yield | 0.85% | 1.05% |
| Assets under management | $20.5B | $1.7T |
| Holdings | 104 | 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, “OEF vs VOO holdings overlap and scores”, as of October 28, 2026.
https://etf-copilot.com/compare/oef-vs-voo
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