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AON in the 13F filings

Aon PLC · CUSIP G0403H108

Sector · InsuranceTheme · Financial services· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Dec 2023
the date the book describes
Filed
14 Nov 2024
latest of these filings; the earliest 2 Feb 2024
Managers listing it
24
at least, of 95 tracked, among listed positions
Comparable managers
93
filed both Q3 2023 and Q4 2023; 18 listed it in both
Shares listed
34,299,985
combined, among listed positions
Reported value
$10.0bn
combined, at the quarter end

Among the 93 comparable managers: 15 buyers (opened or added shares) and 9 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing AON in Q4 2023

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2023, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

24 of 24 holders

ActionFiling
MFS Investment Management12,472,342$3.6bn1.17%Trimmed-1,138,8228 Feb 2024 (the filing on sec.gov)
Capital World Investors9,741,551$2.8bn0.50%Trimmed-34,44213 Feb 2024 (the filing on sec.gov)
Berkshire Hathaway Inc4,100,000$1.2bn0.34%Held014 Feb 2024 (the filing on sec.gov)
Neuberger Berman Group LLC1,745,113$508m0.44%Trimmed-383,22414 Nov 2024 (the filing on sec.gov)
Invesco Ltd1,213,158$353m0.08%Trimmed-89,64613 Feb 2024 (the filing on sec.gov)
T. Rowe Price Associates Inc880,740$256munder 0.1%Trimmed-238,59816 Feb 2024 (the filing on sec.gov)
Polen Capital Management LLC819,616$239m0.58%Added+4,32610 May 2024 (the filing on sec.gov)
Artisan Partners LP811,416$236m0.36%Trimmed-500,09912 Feb 2024 (the filing on sec.gov)
Janus Henderson Group Ltd409,018$119m0.07%Trimmed-182,74714 Feb 2024 (the filing on sec.gov)
Millennium Management LLC349,790$102munder 0.1%Newnew14 Feb 2024 (the filing on sec.gov)
Voloridge Investment Management LLC308,043$90m0.35%Newnew14 Feb 2024 (the filing on sec.gov)
Squarepoint Ops LLC229,478$67m0.13%Added+168,64514 Feb 2024 (the filing on sec.gov)
Man Group PLC227,647$66m0.18%Added+156,86714 Feb 2024 (the filing on sec.gov)
Acadian Asset Management LLC203,597$59m0.23%Added+46,77313 Feb 2024 (the filing on sec.gov)
Holocene Advisors LP133,152$39m0.15%Added+103,44914 Feb 2024 (the filing on sec.gov)
Tudor Investment Corp131,072$38m0.31%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Renaissance Technologies LLC129,440$38m0.06%Newnew13 Feb 2024 (the filing on sec.gov)
AQR Capital Management LLC113,461$33m0.06%Trimmed-13,37714 Feb 2024 (the filing on sec.gov)
Markel Group Inc105,350$31m0.33%Added+5,8002 Feb 2024 (the filing on sec.gov)
Bridgewater Associates LP55,979$16m0.09%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC54,531$16m0.11%Added+16,39114 Feb 2024 (the filing on sec.gov)
ExodusPoint Capital Management LP50,350$15m0.10%Added+19,55914 Feb 2024 (the filing on sec.gov)
Quantbot Technologies LP14,237$4.1m0.24%Added+7,82714 Feb 2024 (the filing on sec.gov)
Maverick Capital Ltd904$263kunder 0.1%Newnew14 Feb 2024 (the filing on sec.gov)

Largest increases and reductions, by shares

Q3 2023 to Q4 2023, 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 (4)

Exited (1)

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.
25 in Q3 2024 to 24 in Q2 2026

Tracked managers listing it, at least.

0102030402020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
AON by quarter
QuarterHoldersReported valueBuyersSellers
Q1 20201$1.0bnn.a.n.a.
Q2 202027$10.4bnn.a.n.a.
Q3 202026$10.9bnn.a.n.a.
Q4 202030$10.7bnn.a.n.a.
Q1 202132$12.0bnn.a.n.a.
Q2 202134$13.2bnn.a.n.a.
Q3 202127$13.3bnn.a.n.a.
Q4 202131$14.0bnn.a.n.a.
Q1 202223$15.7bnn.a.n.a.
Q2 202232$12.5bnn.a.n.a.
Q3 202224$11.7bnn.a.n.a.
Q4 202227$12.4bnn.a.n.a.
Q1 202323$12.4bnn.a.n.a.
Q2 202317$13.8bnn.a.n.a.
Q3 202321$12.3bnn.a.n.a.
Q4 202324$10.0bn159
Q1 202423$11.2bn914
Q2 202421$11.0bn137
Q3 202425$13.5bn158
Q4 202424$14.1bn1311
Q1 202524$15.9bn169
Q2 202524$15.0bn178
Q3 202530$16.0bn1712
Q4 202525$16.1bn1725
Q1 202623$14.0bn2619
Q2 202624$15.0bn2022

Compare with…

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

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

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 AON, latest filings →Back to the 13F Explorer →