ACWI vs IOO: holdings overlap, shared companies and scores

As of September 11, 2026, ACWI and IOO overlap 39.0% by weight. iShares MSCI ACWI ETF (ACWI): Large- and mid-cap global stocks. iShares Global 100 ETF (IOO): S&P Global 100 index.

Updated September 11, 2026

How much do ACWI and IOO overlap?

As of September 11, 2026, ACWI and IOO overlap 39.0% by weight.

39% of ACWI is already inside IOO.

100% of IOO is already inside ACWI.

ACWI holds 2,169 companies and IOO holds 112; 110 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 ACWI and IOO?

As of September 11, 2026, ETF Copilot scores ACWI 5.5 out of 10 and IOO 5.7 out of 10.

They differ most on Growth: ACWI 5.3 and IOO 1.8.

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

ACWI vs IOO — ETF Copilot factor scores, 0–10
Factor	ACWI	IOO
Growth	5.3	1.8
Valuation	2.2	4.0
Risk	5.0	4.5
Quality	7.8	9.7
Return	6.7	8.8

ACWI is the cheaper of the two at 0.32% a year

As of September 11, 2026, ACWI charges 0.32% a year, yields 1.62% and holds $33.4B in assets across 2169 positions.

As of September 11, 2026, IOO charges 0.40% a year, yields 1.18% and holds $9.2B in assets across 112 positions.

ACWI vs IOO — cost, income and size
Measure	ACWI	IOO
Expense ratio	0.32%	0.40%
Dividend yield	1.62%	1.18%
Assets under management	$33.4B	$9.2B
Holdings	2169	112

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 ACWI and IOO trade against their own history

ACWI trades at 21.4 times earnings, against its own median of 17.7, and is more expensive than 86% of its own 114 monthly readings since 2017.

IOO trades at 24.1 times earnings, against its own median of 20.5, and is more expensive than 69% of its own 114 monthly readings since 2017.

What moved ACWI and IOO this week

ACWI fell 1.0% in the week to September 11, 2026. The holdings that moved it most were Nvidia (−4.4%), Microsoft (−2.8%) and Novartis (−15.2%); SK Hynix (+14.8%) pushed the other way.

IOO fell 1.1% in the week to September 11, 2026. The holdings that moved it most were Nvidia (−4.4%), Microsoft (−2.8%) and Novartis (−15.2%); Intel (+12.3%) pushed the other way.

What do ACWI and IOO each hold?

What's inside ACWI: Tech 36%, Magnificent 7 21%.

25% of ACWI is its ten largest holdings.

What's inside IOO: Tech 56%, Magnificent 7 48%.

59% of IOO is its ten largest holdings.

Compare with similar funds

Cite this

ETF Copilot, “ACWI vs IOO holdings overlap and scores”, as of September 11, 2026.
https://etf-copilot.com/compare/acwi-vs-ioo