Aon plc
US ˙ NYSE ˙ IE00BLP1HW54

SecurityAON / Aon plc
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership29,551 shares
Latest Disclosed Value $ 9,538,472
Engineers Gate Manager LP reports 11.29% increase in ownership of AON / Aon plc

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 29,551 shares of Aon plc (US:AON) valued at $9,538,472 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 26,552 shares of Aon plc. This represents a change in shares of 11.29% during the quarter. The current value of the position is $9,326,296 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 29,551 2,999 11.29 9,538 1.80 0.1192
2026-02-17 2025-12-31 13F AON SHS CL A G0403H108 26,552 -29,663 -52.77 9,370 -53.26 0.1111
2025-11-14 2025-09-30 13F AON SHS CL A G0403H108 56,215 55,364 6,505.76 20,045 6,515.51 0.2295
2025-08-14 2025-06-30 13F AON SHS CL A G0403H108 851 -18,671 -95.64 304 -96.11 0.0038
2025-05-15 2025-03-31 13F AON SHS CL A G0403H108 19,522 16,181 484.32 7,791 549.79 0.1313
2025-02-14 2024-12-31 13F AON SHS CL A G0403H108 3,341 3,341 1,200 0.0209
2024-11-14 2024-09-30 13F AON SHS CL A G0403H108 0 -14,826 -100.00 0 -100.00
2024-08-14 2024-06-30 13F AON SHS CL A G0403H108 14,826 11,210 310.01 4,353 260.86 0.0982
2024-05-15 2024-03-31 13F AON SHS CL A G0403H108 3,616 -38,507 -91.42 1,207 -90.16 0.0318
2024-02-14 2023-12-31 13F AON SHS CL A G0403H108 42,123 35,875 574.18 12,259 505.33 0.3500
2023-11-14 2023-09-30 13F AON SHS CL A G0403H108 6,248 2,916 87.52 2,026 76.09 0.0749
2023-08-14 2023-06-30 13F AON SHS CL A G0403H108 3,332 144 4.52 1,150 14.43 0.0435
2023-05-15 2023-03-31 13F AON SHS CL A G0403H108 3,188 -4,179 -56.73 1,005 -54.55 0.0420
2023-02-14 2022-12-31 13F AON SHS CL A G0403H108 7,367 6,577 832.53 2,211 942.92 0.1328
2022-11-14 2022-09-30 13F AON SHS CL A G0403H108 790 -2,195 -73.53 212 -73.66 0.0132
2022-08-15 2022-06-30 13F AON SHS CL A G0403H108 2,985 -575 -16.15 805 -30.54 0.0295
2022-05-16 2022-03-31 13F AON SHS CL A G0403H108 3,560 1,400 64.81 1,159 78.58 0.0454
2022-02-14 2021-12-31 13F AON SHS CL A G0403H108 2,160 2,160 649 0.0292
2021-11-15 2021-09-30 13F AON SHS CL A G0403H108 0 -2,091 -100.00 0 -100.00
2021-08-16 2021-06-30 13F AON SHS CL A G0403H108 2,091 -8,237 -79.75 499 -79.01 0.0321
2021-05-17 2021-03-31 13F AON SHS CL A G0403H108 10,328 -2,769 -21.14 2,377 -14.09 0.1178
2021-02-16 2020-12-31 13F AON SHS CL A G0403H108 13,097 13,097 2,767 0.1200
2020-11-16 2020-09-30 13F AON SHS CL A G0403H108 0 -5,810 -100.00 0 -100.00
2020-08-17 2020-06-30 13F AON SHS CL A G0403H108 5,810 -21,963 -79.08 1,119 -75.59 0.0569
2020-05-15 2020-03-31 13F AON SHS CL A G0408V102 27,773 24,220 681.68 4,584 519.46 0.3302
2020-02-14 2019-12-31 13F AON SHS CL A G0408V102 3,553 -19,363 -84.50 740 -83.32 0.0325
2019-11-14 2019-09-30 13F AON SHS CL A G0408V102 22,916 22,916 4,436 0.2253
2018-11-01 2018-09-30 13F AON SHS CL A G0408V102 0 -44,060 -100.00 0 -100.00
2018-08-03 2018-06-30 13F AON SHS CL A G0408V102 44,060 -3,139 -6.65 6,044 -8.74 0.4711
2018-05-07 2018-03-31 13F AON SHS CL A G0408V102 47,199 -6,697 -12.43 6,623 -8.29 0.4414
2018-02-01 2017-12-31 13F AON SHS CL A G0408V102 53,896 44,910 499.78 7,222 450.04 0.4957
2017-11-13 2017-09-30 13F AON SHS CL A G0408V102 8,986 2,352 35.45 1,313 48.87 0.1105
2017-08-10 2017-06-30 13F AON SHS CL A G0408V102 6,634 6,634 882 0.0795
2016-11-09 2016-09-30 13F AON SHS CL A G0408V102 0 -3,002 -100.00 0 -100.00
2016-08-11 2016-06-30 13F AON SHS CL A G0408V102 3,002 3,002 0.00 328 0.0235
2015-11-16 2015-09-30 13F AON SHS CL A G0408V102 0 -15,000 -100.00 0 -100.00
2015-08-14 2015-06-30 13F AON SHS CL A G0408V102 15,000 15,000 1,495 0.1463
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.