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MRSH in the 13F filings

Marsh & Mclennan Cos Inc · CUSIP 571748102

Sector · InsuranceTheme · Financial services· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

Q3 2026: 5 of 95 managers have filed so far; the filing deadline is 16 November 2026. Its figures cover those filers only, so it is not yet a picture of the tracked managers.

Quarter end
30 Sep 2026
the date the book describes
Filed
9 Nov 2026
latest of these filings; the earliest 30 Oct 2026
Managers listing it
4
at least, of 95 tracked, among listed positions
Comparable managers
5
filed both Q2 2026 and Q3 2026; 3 listed it in both
Shares listed
2,025,832
combined, among listed positions
Reported value
$346m
combined, at the quarter end

Among the 5 comparable managers: 2 buyers (opened or added shares) and 1 seller (trimmed or exited), at least, among listed positions. Their net change in shares was +490,484.

Managers listing MRSH in Q3 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q2 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

4 of 4 holders

ActionFiling
Acadian Asset Management LLC1,238,559$211m0.25%Added+490,1209 Nov 2026 (the filing on sec.gov)
Markel Group Inc763,500$130m1.02%Held030 Oct 2026 (the filing on sec.gov)
Squarepoint Ops LLC23,265$4.0munder 0.1%Added+3679 Nov 2026 (the filing on sec.gov)
Baillie Gifford & Co508$87kunder 0.1%Trimmed-39 Nov 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q2 2026 to Q3 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (0)

No new position among listed positions.

Exited (0)

No exit shown by a manager’s own filing.

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
30 in Q4 2024 to 3 in Q3 2026

Tracked managers listing it, at least.

0102030402014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
MRSH by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201315$6.2bnn.a.n.a.
Q3 201312$6.8bnn.a.n.a.
Q4 201313$7.3bnn.a.n.a.
Q1 201417$7.5bnn.a.n.a.
Q2 201411$7.7bnn.a.n.a.
Q3 201417$8.0bnn.a.n.a.
Q4 201419$8.6bnn.a.n.a.
Q1 201517$8.3bnn.a.n.a.
Q2 201520$8.6bnn.a.n.a.
Q3 201521$8.0bnn.a.n.a.
Q4 201519$8.8bnn.a.n.a.
Q1 201619$9.7bnn.a.n.a.
Q2 201616$10.8bnn.a.n.a.
Q3 201620$9.4bnn.a.n.a.
Q4 201627$8.7bnn.a.n.a.
Q1 201724$9.4bnn.a.n.a.
Q2 201723$9.7bnn.a.n.a.
Q3 201717$10.3bnn.a.n.a.
Q4 201721$9.8bnn.a.n.a.
Q1 201819$10.0bnn.a.n.a.
Q2 201816$9.9bnn.a.n.a.
Q3 201816$9.0bnn.a.n.a.
Q4 201821$8.9bnn.a.n.a.
Q1 201923$10.2bnn.a.n.a.
Q2 201923$11.0bnn.a.n.a.
Q3 201918$11.5bnn.a.n.a.
Q4 201920$13.1bnn.a.n.a.
Q1 202023$9.8bnn.a.n.a.
Q2 202020$11.8bnn.a.n.a.
Q3 202021$12.5bnn.a.n.a.
Q4 202025$13.5bnn.a.n.a.
Q1 202123$14.2bnn.a.n.a.
Q2 202125$16.2bnn.a.n.a.
Q3 202126$16.5bnn.a.n.a.
Q4 202127$17.9bnn.a.n.a.
Q1 202226$17.2bnn.a.n.a.
Q2 202225$15.2bnn.a.n.a.
Q3 202228$13.6bnn.a.n.a.
Q4 202227$14.6bnn.a.n.a.
Q1 202330$14.8bnn.a.n.a.
Q2 202327$16.4bnn.a.n.a.
Q3 202327$16.5bnn.a.n.a.
Q4 202321$16.5bn147
Q1 202425$17.8bn1511
Q2 202426$18.3bn179
Q3 202428$19.2bn1514
Q4 202430$18.5bn1712
Q1 202525$22.7bn1016
Q2 202531$21.5bn2110
Q3 202530$19.9bn1712
Q4 202530$18.2bn3014
Q1 202623$18.4bn1627
Q2 202624$17.9bn2318
Q3 20263$342m21

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

MRSH and V →MRSH and AXP →MRSH and BAC →Choose a stock to compare with MRSH →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own MRSH, latest filings →Back to the 13F Explorer →