Aon plc
DE ˙ DB ˙ IE00BLP1HW54
270,60 € ↓ -1,70 (-0,62%)
2026-06-04
DEL PRIS
SecurityDE:4VK / Aon plc
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership7,941 shares
Latest Disclosed Value $ 2,563,391
Vestmark Advisory Solutions, Inc. reports 1.22% increase in ownership of 4VK / Aon plc

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 7,941 shares of Aon plc (DE:4VK) valued at $2,224,274 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 7,845 shares of Aon plc. This represents a change in shares of 1.22% during the quarter. The current value of the position is $2,148,835 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.

Upgrade to unlock premium data and export to Excel .

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 7,941 96 1.22 2,563 -7.41 0.0176
2026-02-06 2025-12-31 13F AON SHS CL A G0403H108 7,845 -1,514 -16.18 2,768 -17.05 0.0374
2025-11-10 2025-09-30 13F AON SHS CL A G0403H108 9,359 -2,184 -18.92 3,337 -18.97 0.0636
2025-08-06 2025-06-30 13F AON SHS CL A G0403H108 11,543 2,618 29.33 4,118 15.64 0.0595
2025-05-13 2025-03-31 13F AON SHS CL A G0403H108 8,925 4,519 102.56 3,562 125.09 0.0917
2025-02-06 2024-12-31 13F AON SHS CL A G0403H108 4,406 2,952 203.03 1,582 214.51 0.0545
2024-11-14 2024-09-30 13F AON SHS CL A G0403H108 1,454 -294 -16.82 503 -1.95 0.0187
2024-08-12 2024-06-30 13F AON SHS CL A G0403H108 1,748 284 19.40 513 5.12 0.0214
2024-05-15 2024-03-31 13F AON SHS CL A G0403H108 1,464 185 14.46 489 31.18 0.0210
2024-02-06 2023-12-31 13F AON SHS CL A G0403H108 1,279 1,279 372 0.0189
2023-11-06 2023-09-30 13F AON SHS CL A G0403H108 0 -2,608 -100.00 0 -100.00
2023-08-07 2023-06-30 13F AON SHS CL A G0403H108 2,608 -1,546 -37.22 900 -31.25 0.0343
2023-05-09 2023-03-31 13F AON SHS CL A G0403H108 4,154 24 0.58 1,310 5.65 0.0567
2023-01-20 2022-12-31 13F AON SHS CL A G0403H108 4,130 -23 -0.55 1,240 11.42 0.0604
2022-11-03 2022-09-30 13F AON SHS CL A G0403H108 4,153 665 19.07 1,112 18.17 0.0620
2022-08-04 2022-06-30 13F AON SHS CL A G0403H108 3,488 -821 -19.05 941 -32.93 0.0537
2022-04-27 2022-03-31 13F AON SHS CL A G0403H108 4,309 -927 -17.70 1,403 -10.86 0.0794
2022-01-31 2021-12-31 13F AON SHS CL A G0403H108 5,236 -873 -14.29 1,574 -9.85 0.0888
2021-11-15 2021-09-30 13F AON SHS CL A G0403H108 6,109 507 9.05 1,746 30.49 0.1183
2021-08-09 2021-06-30 13F AON SHS CL A G0403H108 5,602 587 11.70 1,338 15.94 0.0952
2021-05-10 2021-03-31 13F AON SHS CL A G0403H108 5,015 256 5.38 1,154 14.83 0.1024
2021-02-04 2020-12-31 13F AON SHS CL A G0403H108 4,759 355 8.06 1,005 10.56 0.1128
2020-10-19 2020-09-30 13F AON SHS CL A G0403H108 4,404 174 4.11 909 11.53 0.1221
2020-08-13 2020-06-30 13F AON SHS CL A G0403H108 4,230 296 7.52 815 25.58 0.1261
2020-05-06 2020-03-31 13F AON SHS CL A G0408V102 3,934 3,934 649 0.1269
2020-02-14 2019-12-31 13F AON SHS CL A G0408V102 0 -3,893 -100.00 0 -100.00
2019-11-05 2019-09-30 13F AON SHS CL A G0408V102 3,893 -90 -2.26 753 -2.08 0.1221
2019-08-20 2019-06-30 13F AON SHS CL A G0408V102 3,983 387 10.76 769 25.24 0.1316
2019-05-14 2019-03-31 13F AON SHS CL A G0408V102 3,596 3,596 614 0.1095
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.