OEF vs SPY: holdings overlap, shared companies and scores

As of September 11, 2026, OEF and SPY overlap 72.9% by weight. iShares S&P 100 ETF (OEF): Top 100 U.S. stocks. State Street SPDR S&P 500 ETF (SPY): S&P 500 index exposure.

Updated September 11, 2026

How much do OEF and SPY overlap?

As of September 11, 2026, OEF and SPY overlap 72.9% by weight.

100% of OEF is already inside SPY.

73% of SPY is already inside OEF.

OEF holds 104 companies and SPY holds 501; 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 SPY?

As of September 11, 2026, ETF Copilot scores OEF 5.4 out of 10 and SPY 5.3 out of 10.

They differ most on Growth: OEF 1.8 and SPY 2.7.

The five factor scores behind them are set out below, 0–10 and higher is better, ranked against every US equity ETF we track.

OEF vs SPY — ETF Copilot factor scores, 0–10
FactorOEFSPY
Growth1.82.7
Valuation2.62.2
Risk4.85.0
Quality9.68.8
Return8.37.8

SPY is the cheaper of the two at 0.09% a year

As of September 11, 2026, OEF charges 0.20% a year, yields 0.95% and holds $20.5B in assets across 104 positions.

As of September 11, 2026, SPY charges 0.09% a year, yields 1.11% and holds $806.1B in assets across 501 positions.

OEF vs SPY — cost, income and size
MeasureOEFSPY
Expense ratio0.20%0.09%
Dividend yield0.95%1.11%
Assets under management$20.5B$806.1B
Holdings104501

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 OEF and SPY trade against their own history

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.

SPY trades at 25.4 times earnings, against its own median of 21.6, and is more expensive than 84% of its own 114 monthly readings since 2017.

What moved OEF and SPY this week

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.

SPY fell 1.1% 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 OEF and SPY each hold?

What's inside OEF: Tech 55%, Magnificent 7 47%.

52% of OEF is its ten largest holdings.

What's inside SPY: Tech 46%, Magnificent 7 34%.

38% of SPY is its ten largest holdings.

Compare with similar funds

Cite this

ETF Copilot, “OEF vs SPY holdings overlap and scores”, as of September 11, 2026.
https://etf-copilot.com/compare/oef-vs-spy

  1. iShares S&P 100 ETF (OEF)
  2. State Street SPDR S&P 500 ETF (SPY)

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