Aon plc
DE ˙ DB ˙ IE00BLP1HW54
276,10 € ↑5,50 (2,03%)
2026-06-05
DEL PRIS
SecurityDE:4VK / Aon plc
InstitutionMercer Global Advisors Inc /adv
Latest Disclosed Ownership27,748 shares
Latest Disclosed Value $ 8,956,601
Mercer Global Advisors Inc /adv reports 64.48% increase in ownership of 4VK / Aon plc

On May 15, 2026 - Mercer Global Advisors Inc /adv filed a 13F-HR form disclosing ownership of 27,748 shares of Aon plc (DE:4VK) valued at $7,772,215 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 16,870 shares of Aon plc. This represents a change in shares of 64.48% during the quarter. The current value of the position is $7,661,223 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 27,748 10,878 64.48 8,957 50.47 0.0133
2026-02-17 2025-12-31 13F AON SHS CL A G0403H108 16,870 3,847 29.54 5,953 28.19 0.0091
2025-11-14 2025-09-30 13F AON SHS CL A G0403H108 13,023 4,874 59.81 4,644 59.72 0.0078
2025-08-14 2025-06-30 13F AON SHS CL A G0403H108 8,149 -185 -2.22 2,907 -12.57 0.0059
2025-05-15 2025-03-31 13F AON SHS CL A G0403H108 8,334 -4,209 -33.56 3,326 -26.19 0.0076
2025-02-14 2024-12-31 13F AON SHS CL A G0403H108 12,543 2,428 24.00 4,505 27.84 0.0110
2024-11-14 2024-09-30 13F AON SHS CL A G0403H108 10,115 -3,583 -26.16 3,525 7.44 0.0082
2024-08-12 2024-06-30 13F AON SHS CL A G0403H108 13,698 4,122 43.05 3,281 109,233.33 0.0089
2024-05-15 2024-03-31 13F AON SHS CL A G0403H108 9,576 -1,190 -11.05 3 0.00 0.0091
2024-02-15 2023-12-31 13F AON PLC SHS SHS G0403H108 10,766 837 8.43 3 0.00 0.0094
2023-11-15 2023-09-30 13F/A-1 AON SHS CL A G0403H108 9,929 762 8.31 3 0.00 0.0122
2023-11-14 2023-09-30 13F AON SHS CL A G0403H108 9,929 762 3 0.0122
2023-08-14 2023-06-30 13F AON SHS CL A G0403H108 9,167 52 0.57 3 50.00 0.0126
2023-05-16 2023-03-31 13F AON SHS CL A G0403H108 9,115 115 1.28 3 0.00 0.0131
2023-02-09 2022-12-31 13F AON PLC SHS SHS G0403H108 9,000 2,131 31.02 3 -99.89 0.0135
2022-11-15 2022-09-30 13F AON PLC SHS SHS G0403H108 6,869 312 4.76 1,840 4.07 0.0109
2022-08-10 2022-06-30 13F AON PLC SHS SHS G0403H108 6,557 91 1.41 1,768 -16.05 0.0108
2022-05-10 2022-03-31 13F AON PLC SHS SHS G0403H108 6,466 448 7.44 2,106 16.42 0.0124
2022-02-04 2021-12-31 13F AON PLC SHS SHS G0403H108 6,018 323 5.67 1,809 11.12 0.0112
2021-11-10 2021-09-30 13F AON PLC SHS SHS G0403H108 5,695 877 18.20 1,628 41.57 0.0114
2021-08-10 2021-06-30 13F AON PLC SHS SHS G0403H108 4,818 608 14.44 1,150 18.68 0.0088
2021-08-10 2021-03-31 13F/A-1 AON PLC SHS SHS G0403H108 4,210 734 21.12 969 32.02 0.0088
2021-05-11 2021-03-31 13F AON PLC SHS SHS G0403H108 4,210 734 969 0.0093
2021-02-12 2020-12-31 13F AON PLC SHS SHS G0403H108 3,476 -171 -4.69 734 -2.39 0.0092
2020-12-10 2020-09-30 13F AON PLC SHS CL A SHS G0403H108 3,647 -75 -2.02 752 4.88 0.0113
2020-08-10 2020-06-30 13F AON SHS CL A G0403H108 3,722 3,722 717 0.0130
2020-05-16 2020-03-31 13F AON PLC SHS CL A COM G0408V102 0 -23,271 -100.00 0 -100.00
2020-02-13 2019-12-31 13F AON PLC SHS CL A COM G0408V102 23,271 853 3.80 4,847 11.71 0.0968
2019-11-12 2019-09-30 13F AON PLC SHS CL A COM G0408V102 22,418 -187 -0.83 4,339 -0.53 0.1020
2019-08-14 2019-06-30 13F AON PLC SHS CL A COM G0408V102 22,605 564 2.56 4,362 15.95 0.1156
2019-04-23 2019-03-31 13F/A-1 AON PLC SHS CL A COM G0408V102 22,041 22,041 3,762 0.1353
2019-04-12 2019-03-31 13F AON PLC SHS CL A COM G0408V102 17,110 2,487 0.1325
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.