Aon plc
DE ˙ DB ˙ IE00BLP1HW54
276,10 € ↑5,50 (2,03%)
2026-06-05
DEL PRIS
SecurityDE:4VK / Aon plc
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership1,857,834 shares
Latest Disclosed Value $ 599,684,142
Neuberger Berman Group LLC reports 2.97% increase in ownership of 4VK / Aon plc

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 1,857,834 shares of Aon plc (DE:4VK) valued at $520,379,303 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,804,303 shares of Aon plc. This represents a change in shares of 2.97% during the quarter. The current value of the position is $512,947,967 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)
2026-05-14 2026-03-31 13F AON PLC A Common G0403H108 1,857,834 53,531 2.97 599,684 -5.82 0.2333
2026-02-13 2025-12-31 13F AON PLC A Common G0403H108 1,804,303 -526,060 -22.57 636,733 -23.37 0.4740
2025-11-12 2025-09-30 13F AON PLC A Common G0403H108 2,330,363 249,549 11.99 830,945 11.94 0.6072
2025-08-25 2025-06-30 13F/A-1 AON PLC A Common G0403H108 2,080,814 -55,293 -2.59 742,322 -12.92 0.5712
2025-08-13 2025-06-30 13F AON PLC A Common G0403H108 2,080,814 -55,293 742,322 0.2955
2025-05-13 2025-03-31 13F AON PLC A Common G0403H108 2,136,107 12,245 0.58 852,453 11.75 0.7140
2025-02-13 2024-12-31 13F AON PLC A Common G0403H108 2,123,862 86,148 4.23 762,796 8.19 0.6056
2024-11-14 2024-09-30 13F AON PLC A Common G0403H108 2,037,714 51,281 2.58 705,047 20.90 0.5501
2024-11-14 2024-06-30 13F/A-1 AON PLC A Common G0403H108 1,986,433 264,154 15.34 583,176 1.46 0.4787
2024-08-13 2024-06-30 13F AON PLC A Common G0403H108 1,986,433 264,154 583,176 0.4786
2024-11-14 2024-03-31 13F/A-1 AON PLC A Common G0403H108 1,722,279 -22,834 -1.31 574,758 13.17 0.4751
2024-05-13 2024-03-31 13F AON PLC A Common G0403H108 1,722,279 -22,834 574,758 0.4750
2024-11-14 2023-12-31 13F/A-2 AON PLC A Common G0403H108 1,745,113 -383,224 -18.01 507,862 -26.41 0.4428
2024-02-09 2023-12-31 13F AON PLC A Common G0403H108 1,745,113 -383,224 507,862 0.4428
2023-11-14 2023-09-30 13F AON PLC A Common G0403H108 2,128,337 -255,142 -10.70 690,134 -16.12 0.6288
2023-08-11 2023-06-30 13F AON PLC A Common G0403H108 2,383,479 -160,401 -6.31 822,774 2.59 0.7357
2023-05-12 2023-03-31 13F AON PLC A Common G0403H108 2,543,880 -112,474 -4.23 801,985 0.58 0.7437
2023-02-13 2022-12-31 13F AON PLC A Common G0403H108 2,656,354 70,574 2.73 797,363 15.11 0.7817
2022-11-15 2022-09-30 13F AON PLC A Common G0403H108 2,585,780 54,044 2.13 692,700 1.46 0.7233
2022-08-15 2022-06-30 13F AON PLC A Common G0403H108 2,531,736 10,817 0.43 682,762 -16.83 0.6862
2022-05-23 2022-03-31 13F/A-1 AON PLC A Common G0403H108 2,520,919 -169,687 -6.31 820,893 1.72 0.6955
2022-05-13 2022-03-31 13F AON PLC A Common G0403H108 2,520,919 -169,687 819,237 0.3654
2022-02-11 2021-12-31 13F AON PLC A Common G0403H108 2,690,606 -197,166 -6.83 806,996 -2.09 0.6331
2021-11-12 2021-09-30 13F AON PLC A Common G0403H108 2,887,772 -946,654 -24.69 824,212 -9.89 0.7205
2021-08-13 2021-06-30 13F AON PLC A Common G0403H108 3,834,426 -180,253 -4.49 914,719 -0.95 0.7984
2021-05-13 2021-03-31 13F AON PLC A Common G0403H108 4,014,679 451,871 12.68 923,493 22.74 0.8821
2021-02-10 2020-12-31 13F AON PLC A Common G0403H108 3,562,808 341,845 10.61 752,403 13.25 0.7801
2020-11-12 2020-09-30 13F AON PLC A Common G0403H108 3,220,963 -112,054 -3.36 664,353 3.51 0.7878
2020-08-13 2020-06-30 13F AON PLC A Common G0403H108 3,333,017 29,368 0.89 641,816 17.71 0.7980
2020-05-14 2020-03-31 13F AON PLC Common G0408V102 3,303,649 -55,176 -1.64 545,242 -22.06 0.8311
2020-02-12 2019-12-31 13F AON PLC Common G0408V102 3,358,825 -273,563 -7.53 699,595 -0.50 0.8165
2019-11-13 2019-09-30 13F AON PLC Common G0408V102 3,632,388 -155,207 -4.10 703,119 -3.80 0.8587
2019-08-13 2019-06-30 13F AON PLC Common G0408V102 3,787,595 -146,301 -3.72 730,920 8.85 0.8742
2019-05-13 2019-03-31 13F AON PLC Common G0408V102 3,933,896 -95,986 -2.38 671,479 14.64 0.8228
2019-02-12 2018-12-31 13F AON PLC Common G0408V102 4,029,882 -232,999 -5.47 585,743 -10.66 0.8165
2018-11-16 2018-09-30 13F/A-1 AON PLC Common G0408V102 4,262,881 -27,439 -0.64 655,600 11.42 0.7429
2018-11-13 2018-09-30 13F AON PLC Common G0408V102 4,262,881 -27,439 655,600
2018-08-13 2018-06-30 13F AON PLC Common G0408V102 4,290,320 -6,588 -0.15 588,397 -2.39 0.6496
2018-05-08 2018-03-31 13F AON PLC Common G0408V102 4,296,908 108,182 2.58 602,808 7.41 0.6889
2018-02-14 2017-12-31 13F AON PLC Common G0408V102 4,188,726 -546,576 -11.54 561,196 -18.88 0.6450
2017-11-15 2017-09-30 13F AON COMMON STOCK G0408V102 4,735,302 -33,528 -0.70 691,827 9.12 0.8654
2017-08-08 2017-06-30 13F AON COMMON STOCK G0408V102 4,768,830 -8,678 -0.18 634,016 11.81 0.8143
2017-05-10 2017-03-31 13F AON COMMON STOCK G0408V102 4,777,508 374,859 8.51 567,042 15.48 0.7318
2017-02-06 2016-12-31 13F AON COMMON STOCK G0408V102 4,402,649 -607,185 -12.12 491,027 -12.87 0.6594
2016-11-02 2016-09-30 13F ***AON COMMON STOCK G0408V102 5,009,834 -173,297 -3.34 563,556 -0.46 0.7646
2016-08-05 2016-06-30 13F ***AON COMMON STOCK G0408V102 5,183,131 -564,622 -9.82 566,153 -5.70 0.7800
2016-05-06 2016-03-31 13F ***AON COMMON STOCK G0408V102 5,747,753 -154,944 -2.62 600,353 10.30 0.8254
2016-01-28 2015-12-31 13F ***AON COMMON STOCK G0408V102 5,902,697 -279,230 -4.52 544,288 -0.64 0.7126
2015-11-10 2015-09-30 13F ***AON COMMON STOCK G0408V102 6,181,927 -288,311 -4.46 547,780 -15.07 0.7058
2015-07-31 2015-06-30 13F ***AON COMMON STOCK G0408V102 6,470,238 -286,157 -4.24 644,953 -0.69 0.7171
2015-05-06 2015-03-31 13F ***AON COMMON STOCK G0408V102 6,756,395 6,756,395 0.00 649,425 0.6934
2015-02-05 2014-12-31 13F ***AON COMMON STOCK G0408V102 0 -7,249,315 -100.00 0 -100.00
2014-11-04 2014-09-30 13F ***AON COMMON STOCK G0408V102 7,249,315 64,732 0.90 635,546 -1.81 0.6522
2014-08-05 2014-06-30 13F ***AON COMMON STOCK G0408V102 7,184,583 -9,609 -0.13 647,259 6.75 0.6320
2014-05-05 2014-03-31 13F ***AON COMMON STOCK G0408V102 7,194,192 -1,144,771 -13.73 606,325 -13.33 0.6167
2014-02-11 2013-12-31 13F ***AON COMMON STOCK G0408V102 8,338,963 -91,832 -1.09 699,556 11.47 0.7191
2013-10-29 2013-09-30 13F/A-1 ***AON COMMON STOCK G0408V102 8,430,795 -56,788 -0.67 627,588 14.91 0.6968
2013-10-29 2013-09-30 13F AON COMMON STOCK 037389103 5,159,669 253,133
2013-08-13 2013-06-30 13F ***AON COMMON STOCK G0408V102 8,487,583 8,487,583 546,176 0.6494
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.