Which returned more over the last year, CGMM or IMCB?

In the year to Oct 20, 2026, with distributions reinvested, CGMM returned +11.1% and IMCB +19.2%.

Which is cheaper, CGMM or IMCB?

IMCB is cheaper, by 0.47 percentage points a year. That is about $47 on $10,000 held for a year. Fees come from each fund's prospectus.

How much do CGMM and IMCB overlap with the S&P 500?

By their latest filed holdings, 45% of CGMM and 86% of IMCB by weight is stocks the S&P 500 already holds.

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CGMM vs IMCB: Differences, Returns & Fees

CGMM and IMCB hold 15% of their weight in the same names, and IMCB returned +19.2% over the year. Net assets: $3.5bn on Oct 19, 2026 for Capital Group U.S. Small and Mid Cap ETF, and $1.7bn on Oct 20, 2026 for iShares Morningstar Mid-Cap ETF.

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Answers cite the figures on this page.

IMCB costs 0.47 points a year less; their one-year returns differ by 8.1 points; CGMM is 2.1 times larger.

CGMM vs IMCB: Differences, Returns & Fees
	CGMM	IMCB
Expense ratio	0.51%	0.04%
Net assets, as of Oct 19, 2026	$3.5bn	$1.7bn
Total return, 1 year	+11.1%	+19.2%
What it tracks	No index, actively managed	Morningstar US Mid Cap Index
Holdings in common	15%
Top ten holdings, share of the fund	18.7%	7.9%
Below its high	6.8%, high on Aug 13, 2026	3.3%, high on Aug 14, 2026

Holdings in common uses holdings dated May 31, 2026 and Oct 19, 2026.

+11.1%

CGMM total return, 1 year

+19.2%

IMCB total return, 1 year

0.51%

CGMM expense ratio

0.04%

IMCB expense ratio

What they hold in common

By the books each fund has filed, CGMM and IMCB hold 15% of their money in the same securities at the same weight. Holdings dated May 31, 2026 and Oct 19, 2026.

50%

half

15% in common

Positions both hold, largest shared weight first

Holding CGMM IMCB

Cloudflare Inc 0.92% 0.67%

CSX Corp 0.66% 0.62%

Hilton Worldwide Holdings Inc 0.86% 0.53%

Hewlett Packard Enterprise Co 1.59% 0.52%

DoorDash Inc 1.53% 0.51%

General Motors Co 0.87% 0.51%

SLB Ltd 0.68% 0.51%

Arthur J Gallagher & Co 0.71% 0.45%

Bloom Energy Corp 2.56% 0.45%

Monster Beverage Corp 1.34% 0.45%

United Rentals Inc 0.86% 0.45%

Lumentum Holdings Inc 0.41% 0.51%

Only in CGMM

Capital Group Central Cash Fund 2.20%

RenaissanceRe Holdings Ltd 1.84%

WEX Inc 1.77%

LKQ Corp 1.54%

Ingram Micro Holding Corp 1.43%

Vail Resorts Inc 1.39%

Akamai Technologies Inc 1.30%

Simon Property Group Inc 1.23%

Only in IMCB

MARATHON PETROLEUM 0.93%

DELL TECHNOLOGIES INC CLASS C 0.91%

VALERO ENERGY CORP 0.87%

PHILLIPS 66 0.81%

AUTOMATIC DATA PROCESSING INC 0.80%

FORTINET 0.75%

SNOWFLAKE 0.74%

FREEPORT MCMORAN INC 0.70%

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On the same fields

CGMM

Capital Group U.S. Small and Mid Cap ETF

IMCB

iShares Morningstar Mid-Cap ETF

Where it sits Stock ETF Stock ETF

Issuer Capital Group iShares

What it is Actively managed Tracks an index

Total return, 1 year +11.1% +19.2%

Its benchmark over the same days +15.0% (IWV) not measured

Gap to its benchmark −4.0 pts vs IWV not measured

Expense ratio 0.51% 0.04%

Already in the S&P 500 45.4% 86.3%

Holdings 114 394

Net assets, CGMM as of Oct 19, 2026 and IMCB as of Oct 20, 2026 $3.5bn $1.7bn

CGMM and IMCB on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.

About CGMM

CGMM is actively managed and tracks no index. The prospectus expense ratio is 0.51% a year. By its holdings filed for May 31, 2026, 45% of the fund by weight is stocks the S&P 500 also holds, across 114 positions, with the top ten at 18.7%. It sat 6.8% below its high of Aug 13, 2026 on Oct 20, 2026.

Over the year to Oct 20, 2026 it returned +11.1% with distributions reinvested, against +15.0% for its benchmark, the Russell 3000 Index.

About IMCB

IMCB tracks an index. Over the year to Oct 20, 2026 it returned +19.2% with distributions reinvested. The prospectus expense ratio is 0.04% a year. By its holdings published by its issuer for Oct 19, 2026, 86% of the fund by weight is stocks the S&P 500 also holds, across 394 positions, with the top ten at 7.9%. It sat 3.3% below its high of Aug 14, 2026 on Oct 20, 2026.

Questions people ask

Which returned more over the last year, CGMM or IMCB?: In the year to Oct 20, 2026, with distributions reinvested, CGMM returned +11.1% and IMCB +19.2%.
Which is cheaper, CGMM or IMCB?: IMCB is cheaper, by 0.47 percentage points a year. That is about $47 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do CGMM and IMCB overlap with the S&P 500?: By their latest filed holdings, 45% of CGMM and 86% of IMCB by weight is stocks the S&P 500 already holds.

Other comparisons

CGMM vs XMHQ CGMM vs IJH CGMM vs IVOG CGMM vs VFMO IMCB vs IVOO IMCB vs TMSL IMCB vs IMCG IMCB vs JMEE

CGMM on its own →IMCB on its own →Hold both: look the portfolio through →Rankings →CGMM dividend history →CGMM holdings →IMCB dividend history →IMCB holdings →Standards and sources →

Where these figures came from

CGMM filings on SEC EDGAR ↗CGMM prospectus with the expense ratio (SEC) ↗Capital Group page for CGMM ↗IMCB filings on SEC EDGAR ↗IMCB prospectus with the expense ratio (SEC) ↗iShares page for IMCB ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.

How this is computed

Overlap adds up the smaller of the two weights for each security both funds hold.

Cite this pageCitation, APA and Markdown

ETFIQ, CGMM against IMCB, data as of Oct 20, 2026. https://etfiq.com/compare/any/cgmm-vs-imcb

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Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.