ACWI vs USMC: holdings overlap, shared companies and scores

As of September 11, 2026, ACWI and USMC overlap 31.2% by weight. iShares MSCI ACWI ETF (ACWI): Large- and mid-cap global stocks. Principal U.S. Mega-Cap ETF (USMC): U.S. mega-cap stocks.

Updated September 11, 2026

How much do ACWI and USMC overlap?

As of September 11, 2026, ACWI and USMC overlap 31.2% by weight.

31% of ACWI is already inside USMC.

100% of USMC is already inside ACWI.

ACWI holds 2,169 companies and USMC holds 27; 26 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 USMC?

As of September 11, 2026, ETF Copilot scores ACWI 5.5 out of 10 and USMC 6.1 out of 10.

They differ most on Risk: ACWI 5.0 and USMC 8.2.

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 USMC — ETF Copilot factor scores, 0–10
Factor	ACWI	USMC
Growth	5.3	2.7
Valuation	2.2	3.7
Risk	5.0	8.2
Quality	7.8	9.8
Return	6.7	7.2

USMC is the cheaper of the two at 0.12% 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, USMC charges 0.12% a year, yields 0.86% and holds $3.5B in assets across 27 positions.

ACWI vs USMC — cost, income and size
Measure	ACWI	USMC
Expense ratio	0.32%	0.12%
Dividend yield	1.62%	0.86%
Assets under management	$33.4B	$3.5B
Holdings	2169	27

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 USMC 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.

USMC trades at 26.1 times earnings, against its own median of 23.7, and is more expensive than 68% of its own 108 monthly readings since 2017.

What moved ACWI and USMC 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.

USMC fell 1.1% in the week to September 11, 2026. The holdings that moved it most were Nvidia (−4.4%), Netflix (−6.4%) and Microsoft (−2.8%); Meta Platforms (+6.1%) pushed the other way.

What do ACWI and USMC each hold?

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

25% of ACWI is its ten largest holdings.

What's inside USMC: Tech 42%, Magnificent 7 36%.

55% of USMC is its ten largest holdings.

Compare with similar funds

Cite this

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