Aon plc
DE ˙ DB ˙ IE00BLP1HW54
272,30 € ↓ -1,70 (-0,62%)
2026-06-03
DEL PRIS
SecurityDE:4VK / Aon plc
InstitutionWestpac Banking Corp
Latest Disclosed Ownership2,093 shares
Latest Disclosed Value $ 675,579
Westpac Banking Corp reports 265.91% increase in ownership of 4VK / Aon plc

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 2,093 shares of Aon plc (DE:4VK) valued at $586,249 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 572 shares of Aon plc. This represents a change in shares of 265.91% during the quarter. The current value of the position is $569,924 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)
2026-05-11 2026-03-31 13F AON SHS CL A G0403H108 2,093 1,521 265.91 676 235.82 0.0235
2026-02-10 2025-12-31 13F AON PLC USD SHS CL A G0403H108 572 -48 -7.74 202 -9.05 0.0127
2025-11-14 2025-09-30 13F/A-1 AON PLC USD SHS CL A G0403H108 620 33 5.62 221 5.74 0.0137
2025-11-12 2025-09-30 13F AON PLC USD SHS CL A G0403H108 620 33 221 0.0055
2025-08-11 2025-06-30 13F AON SHS CL A G0403H108 587 -21 -3.45 209 -13.64 0.0140
2025-05-13 2025-03-31 13F AON SHS CL A G0403H108 608 -20 -3.18 243 7.56 0.0179
2025-02-12 2024-12-31 13F AON SHS CL A G0403H108 628 -96 -13.26 226 -10.00 0.0150
2024-11-08 2024-09-30 13F AON SHS CL A G0403H108 724 2 0.28 250 18.48 0.0168
2024-08-14 2024-06-30 13F/A-1 AON SHS CL A G0403H108 722 722 212 0.0168
2024-08-13 2024-06-30 13F AON SHS CL A G0403H108 722 722 212 0.0073
2023-08-10 2023-06-30 13F AON SHS CL A G0403H108 0 -25,626 -100.00 0 -100.00
2023-05-04 2023-03-31 13F AON SHS CL A G0403H108 25,626 -15,121 -37.11 8,080 -33.94 0.1086
2023-02-06 2022-12-31 13F AON SHS CL A G0403H108 40,747 -3,488 -7.89 12,230 3.21 0.1808
2022-11-08 2022-09-30 13F AON COM G0403H108 44,235 -2,412 -5.17 11,849 -5.80 0.1806
2022-08-10 2022-06-30 13F AON SHS CL A G0403H108 46,647 8,569 22.50 12,580 1.45 0.1639
2022-05-11 2022-03-31 13F AON SHS CL A G0403H108 38,078 -496 -1.29 12,399 6.95 0.1423
2022-02-08 2021-12-31 13F AON SHS CL A G0403H108 38,574 -1,818 -4.50 11,594 0.44 0.1201
2021-10-27 2021-09-30 13F AON SHS CL A G0403H108 40,392 -3,643 -8.27 11,543 9.79 0.1234
2021-08-11 2021-06-30 13F AON SHS CL A G0403H108 44,035 18,265 70.88 10,514 77.31 0.1056
2021-05-13 2021-03-31 13F AON SHS CL A G0403H108 25,770 -200 -0.77 5,930 8.08 0.0654
2021-02-11 2020-12-31 13F AON SHS CL A G0403H108 25,970 2,958 12.85 5,487 15.57 0.0623
2020-11-10 2020-09-30 13F AON SHS CL A G0403H108 23,012 200 0.88 4,747 8.06 0.0643
2020-08-12 2020-06-30 13F AON SHS CL A G0403H108 22,812 124 0.55 4,394 17.33 0.0655
2020-05-14 2020-03-31 13F AON SHS CL A G0408V102 22,688 -14,556 -39.08 3,744 -51.73 0.0645
2020-02-11 2019-12-31 13F AON SHS CL A G0408V102 37,244 5 0.01 7,758 7.62 0.0999
2019-11-13 2019-09-30 13F AON SHS CL A G0408V102 37,239 37,239 7,208 0.1002
2019-05-13 2019-03-31 13F AON SHS CL A G0408V102 0 -87,713 -100.00 0 -100.00
2019-02-07 2018-12-31 13F AON SHS CL A G0408V102 87,713 87,713 12,750 0.2173
2018-01-18 2017-12-31 13F AON SHS CL A G0408V102 0 -16,976 -100.00 0 -100.00
2017-10-30 2017-09-30 13F AON SHS CL A G0408V102 16,976 -336 -1.94 2,480 7.78 0.0546
2017-08-09 2017-06-30 13F AON SHS CL A G0408V102 17,312 -9,315 -34.98 2,302 -27.18 0.0507
2017-05-18 2017-03-31 13F/A-1 AON SHS CL A G0408V102 26,627 19,958 299.27 3,160 207.69 0.0253
2017-05-11 2017-03-31 13F AON SHS CL A G0408V102 6,739 800
2017-02-09 2016-12-31 13F AON SHS CL A G0408V102 6,669 -103 -1.52 1,027 34.95 0.0097
2016-11-10 2016-09-30 13F AON SHS CL A G0408V102 6,772 -15,588 -69.71 762 -66.10 0.0082
2016-08-10 2016-06-30 13F AON SHS CL A G0408V102 22,360 10,499 88.52 2,245 81.34 0.0246
2016-05-13 2016-03-31 13F AON SHS CL A G0408V102 11,861 11,861 0.00 1,239 0.0135
2015-08-12 2015-06-30 13F AON SHS CL A G0408V102 0 -16,259 -100.00 0 -100.00
2015-05-12 2015-03-31 13F AON SHS CL A G0408V102 16,259 -29,936 -64.80 1,751 -60.02 0.0152
2015-02-11 2014-12-31 13F AON SHS CL A G0408V102 46,195 -800 -1.70 4,381 6.31 0.0417
2014-11-12 2014-09-30 13F AON SHS CL A G0408V102 46,995 -800 -1.67 4,120 -4.30 0.0402
2014-08-11 2014-06-30 13F AON SHS CL A G0408V102 47,795 14,345 42.88 4,306 52.71 0.0415
2014-05-12 2014-03-31 13F AON SHS CL A G0408V102 33,450 -2,450 -6.82 2,819 -6.38 0.0300
2014-02-13 2013-12-31 13F AON SHS CL A G0408V102 35,900 12,292 52.07 3,012 71.37 0.0345
2013-11-12 2013-09-30 13F AON SHS CL A G0408V102 23,608 -6,105 -20.55 1,757 -7.14 0.0220
2013-08-14 2013-06-30 13F AON SHS CL A G0408V102 29,713 29,713 1,893 0.0289
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.