Aon plc
DE ˙ DB ˙ IE00BLP1HW54
276,10 € ↑5,50 (2,03%)
2026-06-05
DEL PRIS
SecurityDE:4VK / Aon plc
InstitutionVontobel Holding Ltd.
Latest Disclosed Ownership999,176 shares
Latest Disclosed Value $ 322,514,029
Vontobel Holding Ltd. reports 31.45% increase in ownership of 4VK / Aon plc

On May 8, 2026 - Vontobel Holding Ltd. filed a 13F-HR form disclosing ownership of 999,176 shares of Aon plc (DE:4VK) valued at $279,869,198 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 760,139 shares of Aon plc. This represents a change in shares of 31.45% during the quarter. The current value of the position is $275,872,494 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)
2026-05-08 2026-03-31 13F AON SHS CL A G0403H108 999,176 239,037 31.45 322,514 20.23 1.1087
2026-02-13 2025-12-31 13F AON SHS CL A G0403H108 760,139 -129,193 -14.53 268,238 -15.41 0.8448
2025-10-15 2025-09-30 13F AON SHS CL A G0403H108 889,332 428,361 92.93 317,118 92.83 0.9576
2025-07-23 2025-06-30 13F AON SHS CL A G0403H108 460,971 338,373 276.00 164,456 236.13 0.5240
2025-04-28 2025-03-31 13F AON SHS CL A G0403H108 122,598 -28,817 -19.03 48,928 -10.03 0.1784
2025-01-30 2024-12-31 13F AON SHS CL A G0403H108 151,415 55,094 57.20 54,382 63.18 0.1861
2024-10-16 2024-09-30 13F AON SHS CL A G0403H108 96,321 57,847 150.35 33,326 195.05 0.1076
2024-08-13 2024-06-30 13F AON SHS CL A G0403H108 38,474 19,593 103.77 11,295 79.29 0.0367
2024-05-10 2024-03-31 13F AON SHS CL A G0403H108 18,881 -738 -3.76 6,301 10.35 0.0504
2024-06-04 2023-12-31 13F/A-1 AON SHS CL A G0403H108 19,619 -135 -0.68 5,710 -10.85 0.0478
2024-01-30 2023-12-31 13F AON SHS CL A G0403H108 38,203 -299 11,118 0.0558
2024-06-04 2023-09-30 13F/A-1 AON SHS CL A G0403H108 19,754 -171 -0.86 6,405 -6.89 0.0591
2023-10-11 2023-09-30 13F AON SHS CL A G0403H108 38,502 -313 12,483 0.0696
2024-06-04 2023-06-30 13F/A-1 AON SHS CL A G0403H108 19,925 -5,690 -22.21 6,878 -14.83 0.0603
2023-07-24 2023-06-30 13F AON SHS CL A G0403H108 38,815 13,200 13,399 0.0711
2024-06-04 2023-03-31 13F/A-1 AON SHS CL A G0403H108 25,615 654 2.62 8,076 8.03 0.0751
2023-04-12 2023-03-31 13F AON SHS CL A G0403H108 50,198 25,237 15,827 0.0900
2023-02-14 2022-12-31 13F AON SHS CL A G0403H108 24,961 -6,898 -21.65 7,476 -12.40 0.0755
2022-11-04 2022-09-30 13F AON SHS CL A G0403H108 31,859 26,376 481.05 8,534 478.58 0.0996
2022-07-27 2022-06-30 13F AON SHS CL A G0403H108 5,483 9 0.16 1,475 -17.46 0.0159
2022-05-13 2022-03-31 13F AON SHS CL A G0403H108 5,474 -714 -11.54 1,787 -3.67 0.0154
2022-02-14 2021-12-31 13F/A-1 AON SHS CL A G0403H108 6,188 432 7.51 1,855 12.83 0.0154
2022-02-10 2021-12-31 13F AON SHS CL A G0403H108 5,756 0 1,644 0.0062
2021-10-29 2021-09-30 13F AON SHS CL A G0403H108 5,756 861 17.59 1,644 38.38 0.0145
2021-08-06 2021-06-30 13F AON SHS CL A G0403H108 4,895 4,895 1,188 0.0103
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.