Aon plc
DE ˙ DB ˙ IE00BLP1HW54
276,10 € ↑5,50 (2,03%)
2026-06-05
DEL PRIS
SecurityDE:4VK / Aon plc
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership30,711 shares
Latest Disclosed Value $ 9,913,058
Baird Financial Group, Inc. reports 4.71% increase in ownership of 4VK / Aon plc

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 30,711 shares of Aon plc (DE:4VK) valued at $8,602,151 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 29,329 shares of Aon plc. This represents a change in shares of 4.71% during the quarter. The current value of the position is $8,479,307 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)
2026-05-14 2026-03-31 13F AON SHS CL A G0403H108 30,711 1,382 4.71 9,913 -4.21 0.0083
2026-02-13 2025-12-31 13F AON PLC SHS CL A FOREIGN G0403H108 29,329 825 2.89 10,350 1.83 0.0161
2025-11-13 2025-09-30 13F AON PLC A FOREIGN G0403H108 28,504 668 2.40 10,164 2.35 0.0163
2025-08-13 2025-06-30 13F AON PLC SHS CL A COMMON G0403H108 27,836 909 3.38 9,931 -7.59 0.0174
2025-05-15 2025-03-31 13F AON PLC SHS CL A FOREIGN G0403H108 26,927 653 2.49 10,746 13.88 0.0207
2025-02-14 2024-12-31 13F AON PLC A FOREIGN G0403H108 26,274 2,547 10.73 9,437 14.95 0.0180
2024-11-14 2024-09-30 13F AON PLC A COMMON G0403H108 23,727 1,024 4.51 8,209 23.17 0.0159
2024-08-14 2024-06-30 13F AON PLC A FOREIGN G0403H108 22,703 -6,944 -23.42 6,665 -32.63 0.0138
2024-05-14 2024-03-31 13F AON PLC A FOREIGN G0403H108 29,647 788 2.73 9,894 17.80 0.0207
2024-02-14 2023-12-31 13F AON PLC A FOREIGN G0403H108 28,859 290 1.02 8,399 -9.33 0.0191
2023-11-13 2023-09-30 13F AON PLC A FOREIGN G0403H108 28,569 481 1.71 9,263 -4.47 0.0253
2023-08-11 2023-06-30 13F AON PLC A FOREIGN G0403H108 28,088 212 0.76 9,696 10.31 0.0256
2023-05-15 2023-03-31 13F AON PLC A FOREIGN G0403H108 27,876 487 1.78 8,789 109,762.50 0.0217
2023-02-13 2022-12-31 13F AON PLC A FOREIGN G0403H108 27,389 327 1.21 8 -99.89 0.0216
2022-11-15 2022-09-30 13F AON PLC A FOREIGN G0403H108 27,062 -5,995 -18.14 7,249 -18.69 0.0214
2022-08-08 2022-06-30 13F AON PLC A COMMON G0403H108 33,057 4,606 16.19 8,915 -3.77 0.0247
2022-05-13 2022-03-31 13F AON PLC A COMMON G0403H108 28,451 3,948 16.11 9,264 25.78 0.0229
2022-02-09 2021-12-31 13F AON PLC A COMMON G0403H108 24,503 -330 -1.33 7,365 3.78 0.0172
2021-11-12 2021-09-30 13F AON PLC A COMMON G0403H108 24,833 6,277 33.83 7,097 60.20 0.0182
2021-08-11 2021-06-30 13F AON PLC A COMMON G0403H108 18,556 1,159 6.66 4,430 10.67 0.0115
2021-05-13 2021-03-31 13F AON PLC A COMMON G0403H108 17,397 1,925 12.44 4,003 22.45 0.0112
2021-02-11 2020-12-31 13F AON PLC A COMMON G0403H108 15,472 -25,421 -62.16 3,269 -61.25 0.0098
2020-11-12 2020-09-30 13F AON PLC A COMMON G0403H108 40,893 1,994 5.13 8,436 12.60 0.0289
2020-10-22 2020-06-30 13F/A-1 AON PLC A COMMON G0403H108 38,899 -5,939 -13.25 7,492 1.24 0.0282
2020-05-14 2020-03-31 13F AON PLC CL A FOREIGN G0408V102 44,838 12,330 37.93 7,400 9.29 0.0338
2020-02-14 2019-12-31 13F AON PLC CL A COMMON G0408V102 32,508 22,551 226.48 6,771 251.38 0.0243
2019-11-14 2019-09-30 13F AON Common G0408V102 9,957 -568 -5.40 1,927 -5.12 0.0076
2019-08-14 2019-06-30 13F AON COMMON G0408V102 10,525 8,504 420.78 2,031 488.70 0.0079
2019-05-14 2019-03-31 13F AON PLC CL A FOREIGN G0408V102 2,021 -2,037 -50.20 345 -41.53 0.0020
2019-02-14 2018-12-31 13F AON PLC CL A FOREIGN G0408V102 4,058 1,909 88.83 590 77.18 0.0040
2018-11-13 2018-09-30 13F AON PLC CL A FOREIGN G0408V102 2,149 2,149 333 0.0021
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.