Company · Ownership research

MARSH & MCLENNAN COMPANIES, INC. MRSH

CIK 0000062709 · CUSIP 571748102

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 571748102 (MRSH), not CUSIP 571748902 (MRSH), CUSIP 571748952 (MRSH), and does not merge CUSIPs.

This page lists the top 20 of 1,530 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	VANGUARD GROUP INC CIK 102909 · View history	$9.90B 44,382,897 shares	0.18%	+344.45K(+0.80%)Added	SEC filing ↗ Nov 13, 2024	▾
02	BlackRock, Inc. CIK 2012383 · View history	$9.28B 41,609,881 shares	0.20%	—	SEC filing ↗ Nov 13, 2024	▾
03	FMR LLC CIK 315066 · View history	$4.78B 21,445,110 shares	0.29%	+518.18K(+2.50%)Added	SEC filing ↗ Nov 13, 2024	▾
04	STATE STREET CORP CIK 93751 · View history	$4.67B 20,914,202 shares	0.19%	+10.98K(+0.10%)Added	SEC filing ↗ Nov 14, 2024	▾
05	Capital International Investors CIK 1562230 · View history	$4.09B 18,328,356 shares	0.78%	+20.24K(+0.10%)Added	SEC filing ↗ Nov 13, 2024	▾
06	Capital World Investors CIK 1422849 · View history	$3.92B 17,583,307 shares	0.61%	-88.94K(-0.50%)Reduced	SEC filing ↗ Nov 13, 2024	▾
07	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.65B 11,905,431 shares	0.21%	+251.36K(+2.20%)Added	SEC filing ↗ Nov 12, 2024	▾
08	MASSACHUSETTS FINANCIAL SERVICES CO /MA/ CIK 912938 · View history	$2.41B 10,824,587 shares	0.72%	-244.57K(-2.20%)Reduced	SEC filing ↗ Nov 12, 2024	▾
09	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$2.24B 10,054,270 shares	0.26%	-528.20K(-5.00%)Reduced	SEC filing ↗ Nov 14, 2024	▾
10	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$1.91B 8,556,459 shares	0.33%	-537.80K(-5.90%)Reduced	SEC filing ↗ Nov 14, 2024	▾
11	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$1.87B 8,381,878 shares	0.48%	+445.66K(+5.60%)Added	SEC filing ↗ Nov 14, 2024	▾
12	BANK OF AMERICA CORP /DE/ CIK 70858 · Amended · View history	$1.64B 7,346,796 shares	0.14%	-273.63K(-3.60%)Reduced	SEC filing ↗ Nov 14, 2024	▾
13	Mawer Investment Management Ltd. CIK 1538449 · View history	$1.54B 6,918,358 shares	7.03%	-51.79K(-0.70%)Reduced	SEC filing ↗ Nov 7, 2024	▾
14	MORGAN STANLEY CIK 895421 · Amended · View history	$1.45B 6,512,389 shares	0.11%	+184.06K(+2.90%)Added	SEC filing ↗ May 14, 2025	▾
15	NORGES BANK CIK 1374170 · Amended · View history	$1.29B 5,787,136 shares	0.18%	-295.27K(-4.90%)Reduced	SEC filing ↗ Nov 13, 2024	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$1.16B 5,207,627 shares	0.19%	-243.99K(-4.50%)Reduced	SEC filing ↗ Nov 13, 2024	▾
17	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC CIK 861177 · View history	$1.03B 4,608,886 shares	0.26%	-76.08K(-1.60%)Reduced	SEC filing ↗ Nov 14, 2024	▾
18	PARNASSUS INVESTMENTS, LLC CIK 948669 · View history	$953.68M 4,274,880 shares	2.02%	+85.75K(+2.00%)Added	SEC filing ↗ Nov 8, 2024	▾
19	Nuveen Asset Management, LLC CIK 1521019 · View history	$953.27M 4,273,014 shares	0.27%	-345.17K(-7.50%)Reduced	SEC filing ↗ Nov 14, 2024	▾
20	UBS Group AG CIK 1610520 · View history	$915.05M 4,101,709 shares	0.26%	+170.00K(+4.30%)Added	SEC filing ↗ Nov 14, 2024	▾

Showing 20 / 1,530 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

1,530

Cancelled or null records excluded

Disclosed shares

435,721,819

Not deduplicated across managers

Disclosed value

$97.09B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

MARSH & MCLENNAN COMPANIES, INC. · Q3 2024

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.