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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 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 1 May 2026
Managers listing it
38
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 21 listed it in both
Shares listed
44,129,594
combined, among listed positions
Reported value
$14.3bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 26 buyers (opened or added shares) and 19 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -3,565,856.

Managers listing AON in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

38 of 38 holders

ActionFiling
Capital World Investors11,477,788$3.7bn0.51%Trimmed-775,11613 May 2026 (the filing on sec.gov)
MFS Investment Management8,358,097$2.8bn0.92%Trimmed-186,93914 May 2026 (the filing on sec.gov)
Dodge & Cox8,116,095$2.6bn1.44%Added+263,63914 May 2026 (the filing on sec.gov)
Farallon Capital Management LLC2,512,638$811m4.25%Trimmed-152,60015 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC1,857,834$600m0.46%Added+53,53127 Oct 2026 (the filing on sec.gov)
Artisan Partners LP1,644,152$531m0.85%Added+526,72413 May 2026 (the filing on sec.gov)
Invesco Ltd1,486,623$480munder 0.1%Added+150,49412 May 2026 (the filing on sec.gov)
Polen Capital Management LLC1,354,053$437m3.02%Trimmed-492,24114 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,280,926$413munder 0.1%Added+702,53515 May 2026 (the filing on sec.gov)
Viking Global Investors LP1,087,114$351m0.98%Added+303,46415 May 2026 (the filing on sec.gov)
AQR Capital Management LLC979,755$316m0.14%Added+549,58215 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP797,418$257m0.14%Added+340,86614 May 2026 (the filing on sec.gov)
Baupost Group LLC769,000$248m4.85%Newnew14 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)523,184$169munder 0.1%Trimmed-817,98015 May 2026 (the filing on sec.gov)
AllianceBernstein LP220,323$78munder 0.1%Added+1,82815 May 2026 (the filing on sec.gov)
Verition Fund Management LLC228,209$74m0.48%Added+20,64715 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC224,321$72m0.09%Trimmed-162,69215 May 2026 (the filing on sec.gov)
Man Group PLC139,252$45m0.08%Added+123,43115 May 2026 (the filing on sec.gov)
Markel Group Inc135,800$44m0.37%Added+1,7501 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.128,323$41munder 0.1%Added+85,88815 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC114,974$37m0.15%Newnew15 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC114,003$37m0.26%Added+42,62915 May 2026 (the filing on sec.gov)
Woodline Partners LP102,369$33m0.12%Trimmed-154,01215 May 2026 (the filing on sec.gov)
Wellington Management Group LLP91,374$29munder 0.1%Added+7,14715 May 2026 (the filing on sec.gov)
Citadel Advisors LLC80,300$26munder 0.1%Trimmed-361,98615 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 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 (5)

Exited (7)

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 →