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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
30 Jun 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 1 Aug 2025
Managers listing it
24
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q1 2025 and Q2 2025; 17 listed it in both
Shares listed
41,944,208
combined, among listed positions
Reported value
$15.0bn
combined, at the quarter end

Among the 95 comparable managers: 17 buyers (opened or added shares) and 8 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 Q2 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2025, 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
Capital World Investors12,144,237$4.3bn0.63%Added+46,66013 Aug 2025 (the filing on sec.gov)
MFS Investment Management8,952,011$3.2bn1.01%Trimmed-880,3168 Aug 2025 (the filing on sec.gov)
Berkshire Hathaway Inc4,100,000$1.5bn0.57%Held014 Aug 2025 (the filing on sec.gov)
Polen Capital Management LLC2,745,627$980m3.01%Trimmed-262,09213 Aug 2025 (the filing on sec.gov)
Artisan Partners LP2,176,045$776m1.14%Added+40,21312 Aug 2025 (the filing on sec.gov)
Neuberger Berman Group LLC2,080,814$742m0.57%Trimmed-55,29327 Oct 2026 (the filing on sec.gov)
Farallon Capital Management LLC1,986,417$709m2.98%Added+624,67314 Aug 2025 (the filing on sec.gov)
Fidelity (FMR LLC)1,457,728$520munder 0.1%Addedn.a.14 Aug 2025 (the filing on sec.gov)
Invesco Ltd1,247,865$445m0.08%Added+89,72613 Aug 2025 (the filing on sec.gov)
Wellington Management Group LLP1,113,733$397m0.07%Trimmed-115,64914 Aug 2025 (the filing on sec.gov)
Two Sigma Advisers LP724,400$258m0.53%Newnew14 Aug 2025 (the filing on sec.gov)
Two Sigma Investments LP629,555$225m0.40%Addedn.a.14 Aug 2025 (the filing on sec.gov)
T. Rowe Price Associates Inc621,576$222munder 0.1%Trimmed-40,02014 Aug 2025 (the filing on sec.gov)
Woodline Partners LP412,953$147m0.78%Added+76,43814 Aug 2025 (the filing on sec.gov)
AllianceBernstein LP292,210$104munder 0.1%Added+76,06114 Aug 2025 (the filing on sec.gov)
Verition Fund Management LLC253,876$91m0.40%Added+9,80314 Aug 2025 (the filing on sec.gov)
Marshall Wace LLP241,619$86m0.10%Addedn.a.13 Aug 2025 (the filing on sec.gov)
Moore Capital Management LP201,024$72m0.90%Added+168,64514 Aug 2025 (the filing on sec.gov)
D. E. Shaw & Co.172,969$62munder 0.1%Addedn.a.14 Aug 2025 (the filing on sec.gov)
Janus Henderson Group Ltd158,617$57munder 0.1%Addedn.a.14 Aug 2025 (the filing on sec.gov)
Markel Group Inc129,800$46m0.39%Added+3501 Aug 2025 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC71,776$26m0.17%Trimmed-42,21814 Aug 2025 (the filing on sec.gov)
Quantbot Technologies LP28,657$10m0.26%Added+17,53413 Aug 2025 (the filing on sec.gov)
Harris Associates LP699$249kunder 0.1%Newnew14 Aug 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q1 2025 to Q2 2025, 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 (2)

Exited (2)

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 →