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 1,610 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	$10.09B 46,158,562 shares	0.16%	+837.12K(+1.80%)Added	SEC filing ↗ Aug 11, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$8.81B 40,273,528 shares	0.17%	-327.69K(-0.80%)Reduced	SEC filing ↗ Aug 12, 2025	▾
03	STATE STREET CORP CIK 93751 · View history	$4.69B 21,441,578 shares	0.18%	-48.90K(-0.20%)Reduced	SEC filing ↗ Aug 14, 2025	▾
04	FMR LLC CIK 315066 · View history	$4.38B 20,036,974 shares	0.25%	-2.11M(-9.50%)Reduced	SEC filing ↗ Aug 14, 2025	▾
05	Capital International Investors CIK 1562230 · View history	$4.02B 18,369,664 shares	0.69%	+95.45K(+0.50%)Added	SEC filing ↗ Aug 13, 2025	▾
06	Capital World Investors CIK 1422849 · View history	$3.85B 17,610,131 shares	0.56%	-40.87K(-0.20%)Reduced	SEC filing ↗ Aug 13, 2025	▾
07	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$3.02B 13,831,044 shares	0.55%	+1.02M(+7.90%)Added	SEC filing ↗ Aug 14, 2025	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.76B 12,684,210 shares	0.19%	+196.47K(+1.60%)Added	SEC filing ↗ Aug 8, 2025	▾
09	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$2.20B 10,042,837 shares	0.25%	+1.52M(+17.80%)Added	SEC filing ↗ Aug 14, 2025	▾
10	Capital Research Global Investors CIK 1422848 · View history	$2.14B 9,792,241 shares	0.43%	+3.21M(+48.80%)Added	SEC filing ↗ Aug 13, 2025	▾
11	MASSACHUSETTS FINANCIAL SERVICES CO /MA/ CIK 912938 · View history	$2.12B 9,676,163 shares	0.67%	-420.98K(-4.20%)Reduced	SEC filing ↗ Aug 8, 2025	▾
12	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$1.49B 6,842,335 shares	0.37%	-950.75K(-12.20%)Reduced	SEC filing ↗ Aug 14, 2025	▾
13	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$1.45B 6,619,135 shares	0.12%	-524.45K(-7.30%)Reduced	SEC filing ↗ Aug 14, 2025	▾
14	MORGAN STANLEY CIK 895421 · View history	$1.42B 6,494,294 shares	0.09%	-347.48K(-5.10%)Reduced	SEC filing ↗ Aug 14, 2025	▾
15	NORGES BANK CIK 1374170 · View history	$1.33B 6,076,595 shares	0.17%	+359.12K(+6.30%)Added	SEC filing ↗ Aug 13, 2025	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$1.25B 5,727,176 shares	0.17%	-166.24K(-2.80%)Reduced	SEC filing ↗ Aug 13, 2025	▾
17	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC CIK 861177 · View history	$1.25B 5,706,940 shares	0.25%	+526.02K(+10.20%)Added	SEC filing ↗ Aug 14, 2025	▾
18	Mawer Investment Management Ltd. CIK 1538449 · View history	$1.18B 5,374,871 shares	5.96%	-597.24K(-10.00%)Reduced	SEC filing ↗ Aug 7, 2025	▾
19	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$1.01B 4,599,815 shares	0.16%	+254.60K(+5.90%)Added	SEC filing ↗ Aug 14, 2025	▾
20	UBS Group AG CIK 1610520 · View history	$992.56M 4,539,709 shares	0.21%	-205.12K(-4.30%)Reduced	SEC filing ↗ Aug 14, 2025	▾

Showing 20 / 1,610 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

1,610

Cancelled or null records excluded

Disclosed shares

447,592,616

Not deduplicated across managers

Disclosed value

$97.26B

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. · Q2 2025

Explore all 1,610 reporting institutions.

This page includes 20 of 1,610 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 1,610 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"571748102","quarter":"2025Q2","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

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.