Aon plc
US ˙ NYSE ˙ IE00BLP1HW54

SecurityAON / Aon plc
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership23,049 shares
Latest Disclosed Value $ 7,440,671
Advisor Group Holdings, Inc. reports 1.79% decrease in ownership of AON / Aon plc

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 23,049 shares of Aon plc (US:AON) valued at $7,439,756 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 23,470 shares of Aon plc. This represents a change in shares of -1.79% during the quarter. The current value of the position is $7,572,288 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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F AON SHS CL A G0403H108 23,049 -421 -1.79 7,441 -10.18 0.0063
2026-02-17 2025-12-31 13F AON SHS CL A G0403H108 23,470 -6,424 -21.49 8,284 -22.93 0.0121
2025-11-14 2025-09-30 13F AON SHS CL A G0403H108 29,894 597 2.04 10,748 -1.39 0.0150
2025-09-04 2025-06-30 13F/A-1 ON SHS CL A G0403H108 29,297 17,014 138.52 10,898 122.23 0.0194
2025-08-13 2025-06-30 13F ON SHS CL A G0403H108 22,164 9,881 8,369 0.0097
2025-05-12 2025-03-31 13F AON SHS CL A G0403H108 12,283 -13,834 -52.97 4,904 -23.54 0.0109
2025-06-06 2024-12-31 13F/A-1 AON SHS CL A G0403H108 26,117 10,961 72.32 6,414 22.31 0.0144
2025-02-07 2024-12-31 13F AON SHS CL A G0403H108 25,911 10,755 6,254 0.0160
2024-11-13 2024-09-30 13F AON SHS CL A G0403H108 15,156 -654 -4.14 5,245 12.99 0.0118
2024-08-13 2024-06-30 13F AON SHS CL A G0403H108 15,810 1,894 13.61 4,642 -0.06 0.0110
2024-05-10 2024-03-31 13F AON SHS CL A G0403H108 13,916 -16,056 -53.57 4,645 -46.79 0.0104
2024-02-12 2023-12-31 13F AON SHS CL A G0403H108 29,972 -12,520 -29.46 8,729 -36.67 0.0153
2023-11-13 2023-09-30 13F AON SHS CL A G0403H108 42,492 2,822 7.11 13,782 0.68 0.0204
2023-08-21 2023-06-30 13F/A-1 AON SHS CL A G0403H108 39,670 497 1.27 13,688 10.73 0.0246
2023-08-10 2023-06-30 13F AON SHS CL A G0403H108 428,616 389,443 13,299 0.0036
2023-05-12 2023-03-31 13F AON SHS CL A G0403H108 39,173 245 0.63 12,363 5.78 0.0233
2023-02-10 2022-12-31 13F AON SHS CL A G0403H108 38,928 -2,611 -6.29 11,687 4.99 0.0237
2022-11-14 2022-09-30 13F AON SHS CL A G0403H108 41,539 781 1.92 11,131 1.18 0.0254
2022-08-10 2022-06-30 13F AON SHS CL A G0403H108 40,758 -606 -1.47 11,001 -14.77 0.0243
2022-05-04 2022-03-31 13F AON SHS CL A G0403H108 41,364 -3,540 -7.88 12,908 -4.29 0.0250
2022-02-03 2021-12-31 13F AON SHS CL A G0403H108 44,904 12,144 37.07 13,486 43.82 0.0255
2021-11-05 2021-09-30 13F AON SHS CL A G0403H108 32,760 -139 -0.42 9,377 19.35 0.0195
2021-08-02 2021-06-30 13F AON SHS CL A G0403H108 32,899 5,939 22.03 7,857 26.56 0.0170
2021-05-13 2021-03-31 13F AON SHS CL A G0403H108 26,960 -166 -0.61 6,208 8.30 0.0149
2021-02-10 2020-12-31 13F AON SHS CL A G0403H108 27,126 3,243 13.58 5,732 16.58 0.0153
2020-11-12 2020-09-30 13F AON SHS CL A G0403H108 23,883 3,220 15.58 4,917 23.57 0.0147
2020-08-14 2020-06-30 13F AON SHS CL A G0403H108 20,663 -642 -3.01 3,979 12.88 0.0134
2020-05-18 2020-03-31 13F AON SHS CL A G0408V102 21,305 21,305 3,525 0.0144
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.