Aon plc
US ˙ NYSE ˙ IE00BLP1HW54

SecurityAON / Aon plc
InstitutionDavis R M Inc
Latest Disclosed Ownership127,830 shares
Latest Disclosed Value $ 41,260,967
Davis R M Inc reports 1.06% increase in ownership of AON / Aon plc

On May 13, 2026 - Davis R M Inc filed a 13F-HR form disclosing ownership of 127,830 shares of Aon plc (US:AON) valued at $41,260,967 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 126,495 shares of Aon plc. This represents a change in shares of 1.06% during the quarter. The current value of the position is $40,343,148 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)
2026-05-13 2026-03-31 13F AON SHS CL A G0403H108 127,830 1,335 1.06 41,261 -7.57 0.7323
2026-02-12 2025-12-31 13F Aon COM G0403H108 126,495 253 0.20 44,638 -0.84 0.7685
2025-11-12 2025-09-30 13F Aon COM G0403H108 126,242 986 0.79 45,015 0.74 0.7869
2025-08-07 2025-06-30 13F Aon COM G0403H108 125,256 -32 -0.03 44,686 -10.63 0.8286
2025-05-08 2025-03-31 13F Aon COM G0403H108 125,288 -381 -0.30 50,001 10.78 1.0012
2025-02-07 2024-12-31 13F Aon COM G0403H108 125,669 -201 -0.16 45,135 3.64 0.8808
2024-11-13 2024-09-30 13F Aon COM G0403H108 125,870 8,544 7.28 43,550 26.43 0.8416
2024-08-09 2024-06-30 13F Aon COM G0403H108 117,326 1,823 1.58 34,445 -10.64 0.6994
2024-05-10 2024-03-31 13F Aon COM G0403H108 115,503 1,170 1.02 38,546 15.84 0.8070
2024-02-09 2023-12-31 13F Aon COM G0403H108 114,333 -9,021 -7.31 33,273 85,215.38 0.7676
2023-11-14 2023-09-30 13F Aon COM G0403H108 123,354 -5,556 -4.31 40 -11.36 1.0033
2023-08-10 2023-06-30 13F Aon COM G0403H108 128,910 -2,185 -1.67 44 7.32 1.0688
2023-05-01 2023-03-31 13F Aon COM G0403H108 131,095 -3,170 -2.36 41 2.50 1.0526
2023-02-14 2022-12-31 13F Aon COM G0403H108 134,265 -478 -0.35 40 -99.89 1.0861
2022-11-08 2022-09-30 13F Aon COM G0403H108 134,743 -4,295 -3.09 36,094 -3.74 1.0469
2022-08-08 2022-06-30 13F Aon COM G0403H108 139,038 -1,945 -1.38 37,496 -18.32 1.0454
2022-05-05 2022-03-31 13F Aon COM G0403H108 140,983 -819 -0.58 45,908 7.71 1.0931
2022-02-08 2021-12-31 13F Aon COM G0403H108 141,802 -2,810 -1.94 42,620 3.13 0.9499
2021-11-08 2021-09-30 13F Aon COM G0403H108 144,612 -996 -0.68 41,326 18.87 1.0248
2021-08-12 2021-06-30 13F Aon COM G0403H108 145,608 -2,293 -1.55 34,765 2.15 0.8740
2021-05-10 2021-03-31 13F Aon COM G0403H108 147,901 -1,359 -0.91 34,033 7.92 0.9351
2021-01-27 2020-12-31 13F Aon COM G0403H108 149,260 2,789 1.90 31,534 4.36 0.9050
2020-12-01 2020-09-30 13F Aon COM G0403H108 146,471 2,588 1.80 30,217 9.04 0.9875
2020-07-20 2020-06-30 13F Aon COM G0403H108 143,883 1,570 1.10 27,712 17.99 0.9876
2020-04-24 2020-03-31 13F Aon COM G0408V102 142,313 -6,428 -4.32 23,487 -24.19 0.9761
2020-01-23 2019-12-31 13F Aon COM G0408V102 148,741 -4,136 -2.71 30,981 4.69 1.0157
2019-10-24 2019-09-30 13F Aon COM G0408V102 152,877 -4,494 -2.86 29,592 -2.56 1.0423
2019-07-31 2019-06-30 13F Aon COM G0408V102 157,371 300 0.19 30,369 13.27 1.0807
2019-04-29 2019-03-31 13F Aon COM G0408V102 157,071 -8,123 -4.92 26,812 11.66 0.9979
2019-01-18 2018-12-31 13F Aon COM G0408V102 165,194 3,035 1.87 24,013 -3.71 0.9831
2018-10-17 2018-09-30 13F Aon COM G0408V102 162,159 -2,643 -1.60 24,937 10.31 0.9049
2018-07-19 2018-06-30 13F AON COM G0408V102 164,802 31 0.02 22,606 -2.23 0.8795
2018-04-19 2018-03-31 13F AON COM G0408V102 164,771 3,556 2.21 23,122 7.03 0.9215
2018-01-16 2017-12-31 13F AON COM G0408V102 161,215 -2,092 -1.28 21,603 -9.46 0.8471
2017-10-24 2017-09-30 13F AON COM G0408V102 163,307 2,501 1.56 23,859 11.60 0.9860
2017-07-31 2017-06-30 13F AON COM G0408V102 160,806 4,605 2.95 21,379 15.32 0.9036
2017-05-03 2017-03-31 13F AON COM G0408V102 156,201 9,337 6.36 18,539 13.18 0.8381
2017-01-18 2016-12-31 13F AON COM G0408V102 146,864 6,550 4.67 16,380 3.78 0.7828
2016-10-19 2016-09-30 13F AON COM G0408V102 140,314 17,307 14.07 15,784 17.48 0.7700
2016-07-14 2016-06-30 13F AON COM G0408V102 123,007 -510 -0.41 13,436 4.15 0.6602
2016-04-18 2016-03-31 13F AON COM G0408V102 123,517 15,473 14.32 12,901 29.49 0.6568
2016-01-14 2015-12-31 13F AON COM G0408V102 108,044 14,215 15.15 9,963 19.83 0.5095
2015-10-16 2015-09-30 13F AON COM G0408V102 93,829 39,179 71.69 8,314 52.61 0.4442
2015-07-16 2015-06-30 13F AON COM G0408V102 54,650 42,325 343.41 5,448 359.75 0.2814
2015-04-17 2015-03-31 13F AON COM G0408V102 12,325 12,325 1,185 0.0623
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.