Spears Abacus Advisors LLC reports 0.85% decrease in ownership of 4VK / Aon plc

Aon plc

DE ˙ DB ˙ IE00BLP1HW54

276,10 € ↑5,50 (2,03%)

2026-06-05
DEL PRIS

Security	DE:4VK / Aon plc
Institution	Spears Abacus Advisors LLC
Latest Disclosed Ownership	109,902 shares
Latest Disclosed Value	$ 35,474,103

On May 15, 2026 - Spears Abacus Advisors LLC filed a 13F-HR/A form disclosing ownership of 109,902 shares of Aon plc (DE:4VK) valued at $30,783,550 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 110,849 shares of Aon plc. This represents a change in shares of -0.85% during the quarter. The current value of the position is $30,343,942 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.

Upgrade to unlock premium data and export to Excel Premium Registration Required .

Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-15	2026-03-31	13F/A-1	AON	SHS CL A	G0403H108	109,902	-947	-0.85	35,474	-9.31	0.6955
2026-05-14	2026-03-31	13F	AON	SHS CL A	G0403H108	109,911	-938		35,616		0.7057
2026-02-17	2025-12-31	13F	AON	SHS CL A	G0403H108	110,849	2,736	2.53	39,116	1.47	0.7318
2025-11-14	2025-09-30	13F	AON	SHS CL A	G0403H108	108,113	-210	-0.19	38,551	-0.25	0.7271
2025-08-14	2025-06-30	13F	AON	SHS CL A	G0403H108	108,323	625	0.58	38,645	-10.09	0.7805
2025-05-14	2025-03-31	13F	AON	SHS CL A	G0403H108	107,698	-8,312	-7.16	42,981	3.16	0.9255
2025-02-12	2024-12-31	13F	AON	SHS CL A	G0403H108	116,010	-15,644	-11.88	41,666	-8.53	0.8559
2024-11-12	2024-09-30	13F	AON	SHS CL A	G0403H108	131,654	6,626	5.30	45,551	24.10	0.8965
2024-08-12	2024-06-30	13F	AON	SHS CL A	G0403H108	125,028	1,822	1.48	36,706	-10.73	0.7615
2024-05-10	2024-03-31	13F	AON	SHS CL A	G0403H108	123,206	1,889	1.56	41,116	16.46	0.8501
2024-02-14	2023-12-31	13F	AON	SHS CL A	G0403H108	121,317	2,472	2.08	35,306	-8.37	2.8111
2023-11-21	2023-09-30	13F	AON	SHS CL A	G0403H108	118,845	-85	-0.07	38,532	-6.15	3.3032
2023-08-14	2023-06-30	13F	AON	SHS CL A	G0403H108	118,930	1,347	1.15	41,055	10.74	3.3494
2023-05-15	2023-03-31	13F	AON	SHS CL A	G0403H108	117,583	-111	-0.09	37,073	4.95	3.3194
2023-02-13	2022-12-31	13F	AON	SHS CL A	G0403H108	117,694	-1,906	-1.59	35,325	10.26	3.3683
2022-11-14	2022-09-30	13F	AON	SHS CL A	G0403H108	119,600	-948	-0.79	32,037	-1.45	3.1623
2022-08-08	2022-06-30	13F	AON	SHS CL A	G0403H108	120,548	1,043	0.87	32,509	-16.46	2.9299
2022-05-13	2022-03-31	13F	AON	SHS CL A	G0403H108	119,505	-644	-0.54	38,914	7.76	2.8878
2022-02-14	2021-12-31	13F	AON	SHS CL A	G0403H108	120,149	-1,949	-1.60	36,112	3.50	2.4364
2021-11-15	2021-09-30	13F	AON	SHS CL A	G0403H108	122,098	1,991	1.66	34,892	21.67	2.5226
2021-08-09	2021-06-30	13F	AON	SHS CL A	G0403H108	120,107	1,884	1.59	28,677	5.41	2.0603
2021-05-14	2021-03-31	13F	AON	SHS CL A	G0403H108	118,223	4,041	3.54	27,204	12.77	2.1022
2021-02-12	2020-12-31	13F	AON	SHS CL A	G0403H108	114,182	82,233	257.39	24,123	266.00	2.0153
2020-11-16	2020-09-30	13F	AON	SHS CL A	G0403H108	31,949	411	1.30	6,591	8.51	0.6278
2020-08-12	2020-06-30	13F	AON	SHS CL A	G0403H108	31,538	13,195	71.93	6,074	100.66	0.6388
2020-05-15	2020-03-31	13F	AON	SHS CL A	G0408V102	18,343	2	0.01	3,027	-20.76	0.3703
2020-02-14	2019-12-31	13F	AON	SHS CL A	G0408V102	18,341	0	0.00	3,820	7.61	0.4085
2019-11-14	2019-09-30	13F	AON	SHS CL A	G0408V102	18,341	-200	-1.08	3,550	-0.78	0.4117
2019-08-09	2019-06-30	13F	AON	SHS CL A	G0408V102	18,541	0	0.00	3,578	13.05	0.4203
2019-05-14	2019-03-31	13F	AON	SHS CL A	G0408V102	18,541	0	0.00	3,165	17.44	0.4037
2019-02-13	2018-12-31	13F	AON	SHS CL A	G0408V102	18,541	-1,500	-7.48	2,695	-12.56	0.3954
2018-11-13	2018-09-30	13F	AON	SHS CL A	G0408V102	20,041	0	0.00	3,082	12.11	0.3682
2018-08-10	2018-06-30	13F	AON	SHS CL A	G0408V102	20,041	0	0.00	2,749	-2.24	0.3569
2018-05-15	2018-03-31	13F	AON	SHS CL A	G0408V102	20,041	0	0.00	2,812	4.73	0.3658
2018-02-14	2017-12-31	13F	AON	SHS CL A	G0408V102	20,041	0	0.00	2,685	-8.30	0.3270
2017-11-13	2017-09-30	13F	AON	SHS CL A	G0408V102	20,041	0	0.00	2,928	9.91	0.3503
2017-08-11	2017-06-30	13F	AON	SHS CL A	G0408V102	20,041	1,500	8.09	2,664	21.04	0.3310
2017-05-10	2017-03-31	13F	AON	SHS CL A	G0408V102	18,541	0	0.00	2,201	6.43	0.2781
2017-02-13	2016-12-31	13F	AON	SHS CL A	G0408V102	18,541	0	0.00	2,068	-0.86	0.2656
2016-11-14	2016-09-30	13F	AON	SHS CL A	G0408V102	18,541	-4,000	-17.75	2,086	-15.27	0.2625
2016-08-10	2016-06-30	13F	AON	SHS CL A	G0408V102	22,541	0	0.00	2,462	4.59	0.3122
2016-05-13	2016-03-31	13F	AON	SHS CL A	G0408V102	22,541	0	0.00	2,354	13.23	0.2873
2016-02-16	2015-12-31	13F	AON	SHS CL A	G0408V102	22,541	0	0.00	2,079	4.11	0.2379
2015-11-13	2015-09-30	13F	AON	SHS CL A	G0408V102	22,541	-2,500	-9.98	1,997	-19.99	0.2283
2015-08-14	2015-06-30	13F	AON	SHS CL A	G0408V102	25,041	0	0.00	2,496	3.70	0.2763
2015-05-14	2015-03-31	13F	AON	SHS CL A	G0408V102	25,041	0	0.00	2,407	1.35	0.2881
2015-02-13	2014-12-31	13F	AON	SHS CL A	G0408V102	25,041	6,843	37.60	2,375	48.90	0.2636
2014-11-14	2014-09-30	13F	AON	SHS CL A	G0408V102	18,198	-450	-2.41	1,595	-5.06	0.1907
2014-08-14	2014-06-30	13F	AON	SHS CL A	G0408V102	18,648	-378,058	-95.30	1,680	-94.98	0.1985
2014-05-13	2014-03-31	13F	AON	SHS CL A	G0408V102	396,706	-28,439	-6.69	33,434	-6.26	4.2019
2014-02-14	2013-12-31	13F	AON	SHS CL A	G0408V102	425,145	-72,458	-14.56	35,665	-3.72	4.4523
2013-11-14	2013-09-30	13F	AON	SHS CL A	G0408V102	497,603	-3,177	-0.63	37,042	14.95	4.8255
2013-08-14	2013-06-30	13F	AON	SHS CL A	G0408V102	500,780	500,780		32,225		4.7480

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.