Northern Trust Corp reports 0.84% decrease in ownership of 4VK / Aon plc

Aon plc

DE ˙ DB ˙ IE00BLP1HW54

270,60 € ↓ -1,70 (-0,62%)

2026-06-04
DEL PRIS

Security	DE:4VK / Aon plc
Institution	Northern Trust Corp
Latest Disclosed Ownership	2,082,105 shares
Latest Disclosed Value	$ 672,061,851

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 2,082,105 shares of Aon plc (DE:4VK) valued at $583,197,610 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,099,652 shares of Aon plc. This represents a change in shares of -0.84% during the quarter. The current value of the position is $563,417,613 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-14	2026-03-31	13F	AON	SHS CL A	G0403H108	2,082,105	-17,547	-0.84	672,062	-9.29	0.0182
2026-02-17	2025-12-31	13F	AON	SHS CL A	G0403H108	2,099,652	-113,417	-5.12	740,925	-6.11	0.0195
2025-11-14	2025-09-30	13F	AON	SHS CL A	G0403H108	2,213,069	-55,614	-2.45	789,136	-2.50	0.0230
2025-08-13	2025-06-30	13F	AON	SHS CL A	G0403H108	2,268,683	-21,936	-0.96	809,375	-11.46	0.1113
2025-05-13	2025-03-31	13F	AON	SHS CL A	G0403H108	2,290,619	131,676	6.10	914,163	17.89	0.1357
2025-02-14	2024-12-31	13F	AON	SHS CL A	G0403H108	2,158,943	183,442	9.29	775,406	13.45	0.1098
2024-11-13	2024-09-30	13F	AON	COM	G0403H108	1,975,501	-110,605	-5.30	683,504	11.60	0.1119
2024-08-14	2024-06-30	13F	AON	COM	G0403H108	2,086,106	51,817	2.55	612,439	-9.79	0.1032
2024-05-14	2024-03-31	13F	AON	COM	G0403H108	2,034,289	-108,409	-5.06	678,883	8.87	0.1173
2024-02-13	2023-12-31	13F	AON	COM	G0403H108	2,142,698	-102,211	-4.55	623,568	-14.33	0.1129
2023-11-13	2023-09-30	13F	AON	COM	G0403H108	2,244,909	18,500	0.83	727,844	-5.30	0.1410
2023-08-11	2023-06-30	13F	AON	COM	G0403H108	2,226,409	-209,171	-8.59	768,556	0.08	0.1477
2023-05-15	2023-03-31	13F	AON	COM	G0403H108	2,435,580	-31,123	-1.26	767,914	3.72	0.1522
2023-02-13	2022-12-31	13F	AON	COM	G0403H108	2,466,703	-63,067	-2.49	740,356	9.25	0.1554
2022-11-14	2022-09-30	13F	AON	COM	G0403H108	2,529,770	-40,527	-1.58	677,650	-2.24	0.1548
2022-08-12	2022-06-30	13F	AON	COM	G0403H108	2,570,297	-233,437	-8.33	693,158	-24.08	0.1485
2022-05-13	2022-03-31	13F	AON	COM	G0403H108	2,803,734	-66,872	-2.33	912,981	5.82	0.1606
2022-02-08	2021-12-31	13F	AON	SHS CL A	G0403H108	2,870,606	-130,798	-4.36	862,790	0.59	0.1413
2021-11-15	2021-09-30	13F	AON	SHS CL A	G0403H108	3,001,404	181,554	6.44	857,712	27.40	0.1518
2021-08-13	2021-06-30	13F	AON	SHS CL A	G0403H108	2,819,850	-53,360	-1.86	673,267	1.83	0.1186
2021-05-12	2021-03-31	13F	AON	SHS CL A	G0403H108	2,873,210	-46,225	-1.58	661,154	7.19	0.1230
2021-02-11	2020-12-31	13F	AON	SHS CL A	G0403H108	2,919,435	-81,214	-2.71	616,790	-0.36	0.1201
2020-11-16	2020-09-30	13F	AON	SHS CL A	G0403H108	3,000,649	163,405	5.76	619,034	13.28	0.1357
2020-08-14	2020-06-30	13F	AON	COM	G0403H108	2,837,244	634,781	28.82	546,454	50.33	0.1295
2020-05-14	2020-03-31	13F	AON	SHS CL A	G0408V102	2,202,463	-602,219	-21.47	363,495	-37.78	0.1044
2020-02-14	2019-12-31	13F	AON	SHS CL A	G0408V102	2,804,682	16,742	0.60	584,186	8.25	0.1308
2019-11-13	2019-09-30	13F	AON	COM	G0408V102	2,787,940	-108,564	-3.75	539,663	-3.45	0.1292
2019-08-13	2019-06-30	13F	AON	SHS CL A	G0408V102	2,896,504	23,391	0.81	558,968	13.97	0.1326
2019-05-13	2019-03-31	13F	AON	SHS CL A	G0408V102	2,873,113	23,761	0.83	490,440	18.41	0.1211
2019-02-12	2018-12-31	13F	AON	SHS CL A	G0408V102	2,849,352	70,041	2.52	414,182	-3.09	0.1162
2018-11-14	2018-09-30	13F	AON	SHS CL A	G0408V102	2,779,311	-186,383	-6.28	427,402	5.06	0.1046
2018-09-18	2018-06-30	13F/A-1	AON	SHS CL A	G0408V102	2,965,694	-57,838	-1.91	406,805	-4.12	0.1033
2018-08-14	2018-06-30	13F	AON	SHS CL A	G0408V102	2,982,442	-41,090		409,102
2018-05-09	2018-03-31	13F	AON	SHS CL A	G0408V102	3,023,532	-103,226	-3.30	424,292	1.27	0.1104
2018-02-14	2017-12-31	13F	AON	SHS CL A	G0408V102	3,126,758	-127,786	-3.93	418,986	-11.88	0.1061
2017-11-13	2017-09-30	13F	AON	SHS CL A	G0408V102	3,254,544	143,046	4.60	475,489	14.94	0.1239
2017-08-11	2017-06-30	13F	AON	COM	G0408V102	3,111,498	-4,327	-0.14	413,673	11.86	0.1157
2017-05-12	2017-03-31	13F	AON	COM	G0408V102	3,115,825	17,726	0.57	369,817	7.03	0.1066
2017-02-13	2016-12-31	13F	AON	COM	G0408V102	3,098,099	-114,950	-3.58	345,531	-4.40	0.1060
2016-11-09	2016-09-30	13F	AON	COM	G0408V102	3,213,049	10,858	0.34	361,436	3.33	0.1126
2016-08-12	2016-06-30	13F	AON	SHS CL A	G0408V102	3,202,191	-69,979	-2.14	349,775	3.80	0.1135
2016-08-19	2016-03-31	13F/A-1	AON	SHS CL A	G0408V102	3,272,170	-33,150	-1.00	336,985	10.57	0.1118
2016-05-13	2016-03-31	13F	Aon	COMM	G0408V102	3,272,155			341,776
2016-02-12	2015-12-31	13F	Aon	COMM	G0408V102	3,305,320	-285,368	-7.95	304,783	-4.21	0.1010
2015-11-12	2015-09-30	13F	Aon	COMM	G0408V102	3,590,688	3,590,688	0.00	318,170		0.1062
2015-08-13	2015-06-30	13F	Aon	COMM	G0408V102	0	-3,572,172	-100.00	0	-100.00
2015-05-14	2015-03-31	13F	Aon	COMM	G0408V102	3,572,172	-114,592	-3.11	343,356	-1.79	0.1033
2015-02-12	2014-12-31	13F	Aon	COM	G0408V102	3,686,764	-69,958	-1.86	349,616	6.15	0.1056
2014-11-13	2014-09-30	13F	Aon	COMM	G0408V102	3,756,722	-27,386	-0.72	329,352	-3.39	0.1034
2014-08-14	2014-06-30	13F	AON	com	G0408V102	3,784,108	-177,273	-4.48	340,910	2.11	0.1062
2014-05-14	2014-03-31	13F	AON	COMM	G0408V102	3,961,381	85,222	2.20	333,865	2.67	0.1050
2014-02-21	2013-12-31	13F/A-1	AON	COM	G0408V102	3,876,159	-31,308	-0.80	325,171	11.79	0.1043
2014-02-12	2013-12-31	13F	AON	COM	G0408V102	3,876,159			325,171
2013-11-13	2013-09-30	13F	AON	COM	G0408V102	3,907,467	-222,811	-5.39	290,872	9.44	0.1024
2013-08-09	2013-06-30	13F	AON	COM	G0408V102	4,130,278	4,130,278		265,784		0.0963

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.