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 1,628 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	$11.06B 45,321,445 shares	0.20%	+581.93K(+1.30%)Added	SEC filing ↗ May 9, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$9.91B 40,601,219 shares	0.21%	-1.02M(-2.40%)Reduced	SEC filing ↗ May 2, 2025	▾
03	FMR LLC CIK 315066 · View history	$5.41B 22,151,590 shares	0.35%	+917.19K(+4.30%)Added	SEC filing ↗ May 12, 2025	▾
04	STATE STREET CORP CIK 93751 · View history	$5.24B 21,490,479 shares	0.22%	+239.15K(+1.10%)Added	SEC filing ↗ May 15, 2025	▾
05	Capital International Investors CIK 1562230 · View history	$4.46B 18,274,214 shares	0.88%	+30.43K(+0.20%)Added	SEC filing ↗ May 12, 2025	▾
06	Capital World Investors CIK 1422849 · View history	$4.31B 17,651,003 shares	0.70%	+123.64K(+0.70%)Added	SEC filing ↗ May 12, 2025	▾
07	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$3.13B 12,814,788 shares	0.60%	+4.51M(+54.20%)Added	SEC filing ↗ May 13, 2025	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$3.04B 12,487,735 shares	0.24%	+437.17K(+3.60%)Added	SEC filing ↗ May 13, 2025	▾
09	MASSACHUSETTS FINANCIAL SERVICES CO /MA/ CIK 912938 · View history	$2.46B 10,097,141 shares	0.82%	-248.97K(-2.40%)Reduced	SEC filing ↗ May 2, 2025	▾
10	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$2.08B 8,527,241 shares	0.26%	-1.62M(-16.00%)Reduced	SEC filing ↗ May 14, 2025	▾
11	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$1.90B 7,793,082 shares	0.51%	-539.39K(-6.50%)Reduced	SEC filing ↗ May 14, 2025	▾
12	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$1.74B 7,143,588 shares	0.15%	+634.47K(+9.70%)Added	SEC filing ↗ May 15, 2025	▾
13	MORGAN STANLEY CIK 895421 · View history	$1.67B 6,841,775 shares	0.12%	+272.46K(+4.10%)Added	SEC filing ↗ May 15, 2025	▾
14	Capital Research Global Investors CIK 1422848 · View history	$1.61B 6,580,931 shares	0.35%	+4.16M(+171.90%)Added	SEC filing ↗ May 12, 2025	▾
15	Mawer Investment Management Ltd. CIK 1538449 · View history	$1.46B 5,972,112 shares	7.04%	-249.35K(-4.00%)Reduced	SEC filing ↗ May 7, 2025	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$1.44B 5,893,411 shares	0.21%	-40.93K(-0.70%)Reduced	SEC filing ↗ May 13, 2025	▾
17	NORGES BANK CIK 1374170 · Amended · View history	$1.40B 5,717,471 shares	0.20%	-102.34K(-1.80%)Reduced	SEC filing ↗ May 13, 2025	▾
18	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC CIK 861177 · View history	$1.26B 5,180,922 shares	0.32%	-37.57K(-0.70%)Reduced	SEC filing ↗ May 19, 2025	▾
19	UBS Group AG CIK 1610520 · View history	$1.16B 4,744,828 shares	0.26%	+467.25K(+10.90%)Added	SEC filing ↗ May 13, 2025	▾
20	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$1.06B 4,345,211 shares	0.20%	+319.11K(+7.90%)Added	SEC filing ↗ May 16, 2025	▾

Showing 20 / 1,628 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

1,628

Cancelled or null records excluded

Disclosed shares

443,264,970

Not deduplicated across managers

Disclosed value

$108.13B

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. · Q1 2025

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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.