Aon plc
DE ˙ DB ˙ IE00BLP1HW54
272,30 € ↓ -1,70 (-0,62%)
2026-06-03
AKTIENPREIS
SecurityDE:4VK / Aon plc
InstitutionCitigroup Inc
Latest Disclosed Ownership250,447 shares
Latest Disclosed Value $ 80,839,122
Citigroup Inc ownership in 4VK / Aon plc

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 250,447 shares of Aon plc (DE:4VK) valued at $70,150,205 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 222,425 shares of Aon plc. This represents a change in shares of 12.60% during the quarter. The current value of the position is $68,196,718 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (4VK) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

DE:4VK / Aon plc Historical Put/Call Ratio
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 250,447 28,022 12.60 80,839 2.99 0.0174
2026-02-13 2025-12-31 13F AON SHS CL A G0403H108 222,425 -16,895 -7.06 78,489 -8.02 0.0346
2025-11-10 2025-09-30 13F AON SHS CL A G0403H108 239,320 42,656 21.69 85,337 21.63 0.0380
2025-08-11 2025-06-30 13F AON SHS CL A G0403H108 196,664 -39,853 -16.85 70,162 -25.67 0.0345
2025-05-12 2025-03-31 13F AON SHS CL A G0403H108 236,517 107,714 83.63 94,391 104.04 0.0482
2025-02-12 2024-12-31 13F AON SHS CL A G0403H108 128,803 -939 -0.72 46,261 3.06 0.0274
2024-11-12 2024-09-30 13F AON SHS CL A G0403H108 129,742 -28,825 -18.18 44,890 -3.57 0.0260
2024-08-12 2024-06-30 13F AON SHS CL A G0403H108 158,567 31,288 24.58 46,552 9.60 0.0298
2024-05-10 2024-03-31 13F AON SHS CL A G0403H108 127,279 -30,539 -19.35 42,476 -7.52 0.0279
2024-02-09 2023-12-31 13F AON SHS CL A G0403H108 157,818 -118,081 -42.80 45,928 -48.66 0.0324
2023-12-06 2023-09-30 13F/A-1 AON SHS CL A G0403H108 275,899 99,754 56.63 89,452 47.11 0.0669
2023-11-09 2023-09-30 13F AON SHS CL A G0403H108 275,899 99,754 89,452 0.0267
2023-08-10 2023-06-30 13F AON SHS CL A G0403H108 176,145 -16,240 -8.44 60,805 0.24 0.0399
2023-05-11 2023-03-31 13F AON SHS CL A G0403H108 192,385 39,944 26.20 60,657 32.57 0.0425
2023-02-09 2022-12-31 13F AON SHS CL A G0403H108 152,441 7,106 4.89 45,754 17.52 0.0364
2022-11-10 2022-09-30 13F AON SHS CL A G0403H108 145,335 -94,058 -39.29 38,932 -39.70 0.0279
2022-08-10 2022-06-30 13F AON SHS CL A G0403H108 239,393 38,967 19.44 64,560 -1.08 0.0481
2022-05-12 2022-03-31 13F AON SHS CL A G0403H108 200,426 4,758 2.43 65,264 10.97 0.0397
2022-02-10 2021-12-31 13F AON SHS CL A G0403H108 195,668 -414,244 -67.92 58,811 -66.26 0.0315
2021-11-10 2021-09-30 13F AON SHS CL A G0403H108 609,912 269,044 78.93 174,295 114.16 0.1029
2021-08-10 2021-06-30 13F AON SHS CL A G0403H108 340,868 -188,053 -35.55 81,385 -33.13 0.0490
2021-05-13 2021-03-31 13F AON SHS CL A G0403H108 528,921 217,718 69.96 121,711 85.12 0.0787
2021-02-11 2020-12-31 13F AON SHS CL A G0403H108 311,203 -103,972 -25.04 65,748 -23.24 0.0388
2020-11-12 2020-09-30 13F AON SHS CL A G0403H108 415,175 231,068 125.51 85,650 141.55 0.0559
2020-08-12 2020-06-30 13F AON SHS CL A G0403H108 184,107 95,378 107.49 35,459 136.61 0.0277
2020-05-12 2020-03-31 13F AON SHS CL A G0408V102 88,729 -25,627 -22.41 14,986 -37.08 0.0135
2020-02-12 2019-12-31 13F AON SHS CL A G0408V102 114,356 -13,749 -10.73 23,819 -3.95 0.0172
2019-11-08 2019-09-30 13F AON SHS CL A G0408V102 128,105 -10,744 -7.74 24,798 -7.45 0.0197
2019-08-12 2019-06-30 13F AON SHS CL A G0408V102 138,849 46,638 50.58 26,794 70.23 0.0216
2019-05-13 2019-03-31 13F AON SHS CL A G0408V102 92,211 1,731 1.91 15,740 19.68 0.0152
2019-02-12 2018-12-31 13F AON SHS CL A G0408V102 90,480 25,231 38.67 13,152 31.07 0.0133
2018-11-13 2018-09-30 13F AON SHS CL A G0408V102 65,249 -25,076 -27.76 10,034 -19.02 0.0090
2018-08-10 2018-06-30 13F AON SHS CL A G0408V102 90,325 718 0.80 12,390 -1.46 0.0114
2018-05-11 2018-03-31 13F AON SHS CL A G0408V102 89,607 -49,448 -35.56 12,574 -32.52 0.0104
2018-02-12 2017-12-31 13F AON SHS CL A G0408V102 139,055 918 0.66 18,633 -7.68 0.0149
2017-11-13 2017-09-30 13F AON SHS CL A G0408V102 138,137 18,487 15.45 20,182 26.87 0.0165
2017-08-11 2017-06-30 13F AON SHS CL A G0408V102 119,650 54,813 84.54 15,907 106.72 0.0143
2017-05-12 2017-03-31 13F AON SHS CL A G0408V102 64,837 49,928 334.88 7,695 362.72 0.0069
2017-02-10 2016-12-31 13F AON SHS CL A G0408V102 14,909 6,143 70.08 1,663 68.66 0.0015
2016-11-10 2016-09-30 13F AON SHS CL A G0408V102 8,766 -3,867 -30.61 986 -28.55 0.0009
2016-08-12 2016-06-30 13F AON SHS CL A G0408V102 12,633 -7,702 -37.88 1,380 -35.03 0.0014
2016-05-13 2016-03-31 13F AON SHS CL A G0408V102 20,335 12,399 156.24 2,124 190.16 0.0024
2016-02-12 2015-12-31 13F AON SHS CL A G0408V102 7,936 -4,515 -36.26 732 -33.64 0.0007
2015-11-13 2015-09-30 13F AON SHS CL A G0408V102 12,451 -30,802 -71.21 1,103 -74.41 0.0010
2015-08-13 2015-06-30 13F AON SHS CL A G0408V102 43,253 -15,429 -26.29 4,310 -23.60 0.0038
2015-05-14 2015-03-31 13F AON SHS CL A G0408V102 58,682 33,911 136.90 5,641 140.14 0.0055
2015-02-17 2014-12-31 13F AON SHS CL A G0408V102 24,771 -4,869 -16.43 2,349 -9.58 0.0021
2014-11-14 2014-09-30 13F AON SHS CL A G0408V102 29,640 -28,497 -49.02 2,598 -50.41 0.0023
2014-08-14 2014-06-30 13F AON SHS CL A G0408V102 58,137 -19,502 -25.12 5,239 -19.93 0.0050
2014-05-15 2014-03-31 13F AON SHS CL A G0408V102 77,639 -32,226 -29.33 6,543 -29.01 0.0067
2014-02-14 2013-12-31 13F AON SHS CL A G0408V102 109,865 -102,748 -48.33 9,217 -41.76 0.0083
2013-11-14 2013-09-30 13F AON SHS CL A G0408V102 212,613 12,496 6.24 15,827 22.90 0.0148
2013-08-14 2013-06-30 13F AON SHS CL A G0408V102 200,117 200,117 12,878 0.0127
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2021-05-13 2021-03-31 13F AON SHS CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F AON SHS CL A Call 100 -83.33 21 -83.06 n/a n/a n/a
2020-11-12 2020-09-30 13F AON SHS CL A Call 600 -66.67 124 -64.27 n/a n/a n/a
2020-08-12 2020-06-30 13F AON SHS CL A Call 1,800 63.64 347 86.56 n/a n/a n/a
2020-05-12 2020-03-31 13F AON SHS CL A Call 1,100 -70.27 186 -75.88 n/a n/a n/a
2020-02-12 2019-12-31 13F AON SHS CL A Call 3,700 23.33 771 32.70 n/a n/a n/a
2019-11-08 2019-09-30 13F AON SHS CL A Call 3,000 1,400.00 581 1,389.74 n/a n/a n/a
2019-08-12 2019-06-30 13F AON SHS CL A Call 200 -91.30 39 -90.08 n/a n/a n/a
2019-05-13 2019-03-31 13F AON SHS CL A Call 2,300 21.05 393 42.39 n/a n/a n/a
2019-02-12 2018-12-31 13F AON SHS CL A Call 1,900 -54.76 276 -57.28 n/a n/a n/a
2018-11-13 2018-09-30 13F AON SHS CL A Call 4,200 -17.65 646 -7.71 n/a n/a n/a
2018-08-10 2018-06-30 13F AON SHS CL A Call 5,100 240.00 700 233.33 n/a n/a n/a
2018-05-11 2018-03-31 13F AON SHS CL A Call 1,500 25.00 210 30.43 n/a n/a n/a
2018-02-12 2017-12-31 13F AON SHS CL A Call 1,200 -61.29 161 -19.10 n/a n/a n/a
2013-11-14 2013-09-30 13F AON SHS CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2013-08-14 2013-06-30 13F AON SHS CL A Call 3,100 199 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2021-08-10 2021-06-30 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-13 2021-03-31 13F AON SHS CL A Put 200,000 19,900.00 46,022 21,711.37 n/a n/a n/a
2021-02-11 2020-12-31 13F AON SHS CL A Put 1,000 -52.38 211 -51.27 n/a n/a n/a
2020-11-12 2020-09-30 13F AON SHS CL A Put 2,100 31.25 433 40.58 n/a n/a n/a
2020-08-12 2020-06-30 13F AON SHS CL A Put 1,600 23.08 308 40.00 n/a n/a n/a
2020-05-12 2020-03-31 13F AON SHS CL A Put 1,300 220 n/a n/a n/a
2020-02-12 2019-12-31 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-08 2019-09-30 13F AON SHS CL A Put 300 -99.52 58 -99.52 n/a n/a n/a
2019-08-12 2019-06-30 13F AON SHS CL A Put 62,900 -0.16 12,138 12.87 n/a n/a n/a
2019-05-13 2019-03-31 13F AON SHS CL A Put 63,000 -36.36 10,754 -25.27 n/a n/a n/a
2019-02-12 2018-12-31 13F AON SHS CL A Put 99,000 175.00 14,391 159.95 n/a n/a n/a
2018-11-13 2018-09-30 13F AON SHS CL A Put 36,000 1,700.00 5,536 1,920.44 n/a n/a n/a
2018-08-10 2018-06-30 13F AON SHS CL A Put 2,000 17.65 274 14.64 n/a n/a n/a
2018-05-11 2018-03-31 13F AON SHS CL A Put 1,700 70.00 239 273.44 n/a n/a n/a
2013-11-14 2013-09-30 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2013-08-14 2013-06-30 13F AON SHS CL A Put 1,000 64 n/a n/a n/a
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.