Free · no sign-up · Q2 2026

Which funds own MRSH

Marsh & Mclennan Cos Inc in the Q2 2026 filings. At least 16 of the 91 current managers on file reported a position, worth $15.8bn between them. It is among the largest positions of fewer than a fifth of the current managers on file. The quarter went one way: 10 managers opened or added against 7 cutting.

Managers holding: 16; at least, of 91 current
Combined value: $15.8bn; as reported
Opened: 1; new this quarter
Added to: 9; already held
Trimmed or sold out: 7; 2 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Managers reporting a position

Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.

Manager	Value	Weight	Shares	Change on the quarter	Action
Capital World Investors Long-only · $846bn book	$3.0bn	0.4%	18,122,340	-$97m+153,158	Added
Wellington Management Group LLP Long-only · $580bn book	$2.8bn	0.5%	16,975,238	-$184m-395,471	Trimmed
T. Rowe Price Associates Inc Long-only · $999bn book	$2.2bn	0.2%	13,438,662	+$336m+2,462,376	Added
Capital Research Global Investors Long-only · $717bn book	$1.8bn	0.3%	10,973,649	-$131m-327,539	Trimmed
Harris Associates LP Activist · $75.4bn book	$1.4bn	1.9%	8,687,496	+$551m+3,518,377	Added
Artisan Partners LP Long-only · $63.1bn book	$1.2bn	1.9%	7,269,246	+$366m+2,393,389	Added
MFS Investment Management Long-only · $315bn book	$1.1bn	0.3%	6,507,415	-$334m-1,692,894	Trimmed
Arrowstreet Capital LP Quantitative · $225bn book	$695m	0.3%	4,170,110	+$96m+715,524	Added
AQR Capital Management LLC Quantitative · $287bn book	$432m	0.2%	2,607,451	-$205m-1,066,536	Trimmed
AllianceBernstein LP Long-only · $302bn book	$358m	0.1%	2,061,247	-$10m+79,965	Added
Voloridge Investment Management LLC Quantitative · $23.5bn book	$222m	0.9%	1,330,728	+$32m+238,790	Added
Marshall Wace LLP Quantitative · $127bn book	$174m	0.1%	1,043,399	+$69m+438,346	Added
Markel Group Inc Activist · $13.1bn book	$127m	1.0%	763,500	-$5.2m0	Held
Acadian Asset Management LLC Quantitative · $84.2bn book	$125m	0.1%	748,439	-$22m-95,628	Trimmed
ExodusPoint Capital Management LP Multi-strategy · $15.5bn book	$15m	0.1%	90,636	+$14m+81,918	Added
Quantbot Technologies LP Quantitative · $2.5bn book	$9.7m	0.4%	58,448	opened58,448	New

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

Renaissance Technologies LLC · Quantitative$63m held before
Holocene Advisors LP · Long/short equity$35m held before

Ownership through time

At least 24 of the 95 managers whose filings are on file listed MRSH in Q2 2026, against 14 in Q2 2013. 1 manager more than in Q1 2026: 2 started positions; 2 listed it again; 1 sold out, by its own filing; 2 no longer listed it among the positions read, which can mean a holding below the listed range or a filing not yet made.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it

Their combined reported value

Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Started in Q2 2026

Quantbot Technologies LP$9.7m
PDT Partners LLC$1.5m

Largest increases, by shares

Harris Associates LP5,169,119 to 8,687,496 shares+$586m
T. Rowe Price Associates Inc10,976,286 to 13,438,662 shares+$410m
Artisan Partners LP4,875,857 to 7,269,246 shares+$399m
Arrowstreet Capital LP3,454,586 to 4,170,110 shares+$119m
Marshall Wace LLP605,053 to 1,043,399 shares+$73m

Largest decreases, by shares

Fidelity (FMR LLC)10,180,705 to 6,954,123 shares-$538m
MFS Investment Management8,200,309 to 6,507,415 shares-$283m
AQR Capital Management LLC3,673,987 to 2,607,451 shares-$177m
D. E. Shaw & Co.1,729,550 to 839,616 shares-$148m
Wellington Management Group LLP17,370,709 to 16,975,238 shares-$66m

Left it

Renaissance Technologies LLCwas $63m

Manager	First listed	Largest	Q2 2026
Capital World Investors	Q2 2013	$4.3bn	$3.0bn
Wellington Management Group LLP	Q2 2013	$3.5bn	$2.8bn
T. Rowe Price Associates Inc	Q2 2013	$4.9bn	$2.2bn
Capital Research Global Investors	Q2 2013	$2.1bn	$1.8bn
Harris Associates LP	Q1 2026	$1.4bn	$1.4bn
Artisan Partners LP	Q2 2013	$1.2bn	$1.2bn
Fidelity (FMR LLC)	Q2 2013	$5.4bn	$1.2bn
MFS Investment Management	Q2 2019	$2.5bn	$1.1bn
Invesco Ltd	Q2 2013	$854m	$718m
Arrowstreet Capital LP	Q1 2017	$695m	$695m
AQR Capital Management LLC	Q1 2015	$637m	$432m
AllianceBernstein LP	Q2 2013	$368m	$358m
Voloridge Investment Management LLC	Q4 2014	$318m	$222m
Marshall Wace LLP	Q2 2015	$174m	$174m
D. E. Shaw & Co.	Q2 2013	$519m	$140m
Berkshire Hathaway Inc	Q3 2020	$644m	last listed Q1 2023
Janus Henderson Group Ltd	Q2 2013	$484m	last listed Q4 2025
Viking Global Investors LP	Q3 2014	$439m	last listed Q4 2023
Two Sigma Advisers LP	Q4 2016	$264m	last listed Q4 2025
Two Sigma Investments LP	Q1 2017	$232m	last listed Q1 2026
Renaissance Technologies LLC	Q2 2013	$226m	last listed Q1 2026
Citadel Advisors LLC	Q1 2016	$201m	last listed Q2 2019
Millennium Management LLC	Q2 2013	$165m	last listed Q4 2025
Woodline Partners LP	Q2 2024	$123m	last listed Q4 2025
Balyasny Asset Management LLC	Q1 2014	$105m	last listed Q2 2024

What MRSH is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around MRSH →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

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