Aon plc
DE ˙ DB ˙ IE00BLP1HW54
276,10 € ↑5,50 (2,03%)
2026-06-05
DEL PRIS
SecurityDE:4VK / Aon plc
InstitutionTwo Sigma Securities, Llc
Latest Disclosed Ownership1,827 shares
Latest Disclosed Value $ 589,719
Two Sigma Securities, Llc ownership in 4VK / Aon plc

On May 15, 2026 - Two Sigma Securities, Llc filed a 13F-HR form disclosing ownership of 1,827 shares of Aon plc (DE:4VK) valued at $511,743 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,549 shares of Aon plc. This represents a change in shares of 17.95% during the quarter. The current value of the position is $504,435 USD.

Two Sigma Securities, Llc 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)
2026-05-15 2026-03-31 13F AON SHS CL A G0403H108 1,827 278 17.95 590 7.88 0.0685
2026-02-17 2025-12-31 13F AON SHS CL A G0403H108 1,549 1,549 547 0.0751
2025-11-14 2025-09-30 13F AON SHS CL A G0403H108 0 -2,945 -100.00 0 -100.00
2025-08-14 2025-06-30 13F AON SHS CL A G0403H108 2,945 453 18.18 1,051 5.63 0.1296
2025-05-15 2025-03-31 13F AON SHS CL A G0403H108 2,492 1,671 203.53 995 238.10 0.1508
2025-02-14 2024-12-31 13F AON SHS CL A G0403H108 821 821 295 0.0391
2024-11-14 2024-09-30 13F AON SHS CL A G0403H108 0 -2,118 -100.00 0 -100.00
2024-08-14 2024-06-30 13F AON SHS CL A G0403H108 2,118 2,118 622 0.0075
2024-05-15 2024-03-31 13F AON SHS CL A G0403H108 0 -2,089 -100.00 0 -100.00
2024-02-14 2023-12-31 13F AON SHS CL A G0403H108 2,089 2,089 608 0.0059
2023-05-15 2023-03-31 13F AON SHS CL A G0403H108 0 -1,220 -100.00 0 -100.00
2023-02-14 2022-12-31 13F AON SHS CL A G0403H108 1,220 1,220 366 0.0110
2022-11-14 2022-09-30 13F AON SHS CL A G0403H108 0 -1,028 -100.00 0 -100.00
2022-08-15 2022-06-30 13F AON SHS CL A G0403H108 1,028 1,028 277 0.0098
2022-05-16 2022-03-31 13F AON SHS CL A G0403H108 0 -1,474 -100.00 0 -100.00
2022-02-14 2021-12-31 13F AON SHS CL A G0403H108 1,474 306 26.20 443 32.63 0.0193
2021-11-15 2021-09-30 13F AON SHS CL A G0403H108 1,168 -5,501 -82.49 334 -79.02 0.0098
2021-08-16 2021-06-30 13F AON SHS CL A G0403H108 6,669 4,717 241.65 1,592 254.57 0.0479
2021-05-17 2021-03-31 13F AON SHS CL A G0403H108 1,952 -5,148 -72.51 449 -67.15 0.0248
2020-08-14 2020-06-30 13F AON SHS CL A G0403H108 7,100 7,100 263.73 1,367 204.45 0.0307
2020-05-15 2020-03-31 13F AON SHS CL A G0408V102 0 -4,828 -100.00 0 -100.00
2020-02-14 2019-12-31 13F AON SHS CL A G0408V102 4,828 4,828 1,006 0.0068
2019-05-15 2019-03-31 13F AON SHS CL A G0408V102 0 -1,388 -100.00 0 -100.00
2019-02-14 2018-12-31 13F AON SHS CL A G0408V102 1,388 1,388 202 0.0025
2018-11-14 2018-09-30 13F AON SHS CL A G0408V102 0 -6,771 -100.00 0 -100.00
2018-08-14 2018-06-30 13F AON SHS CL A G0408V102 6,771 1,187 21.26 929 18.49 0.0046
2018-05-15 2018-03-31 13F AON SHS CL A G0408V102 5,584 5,584 -17.53 784 -15.61 0.0044
2017-11-14 2017-09-30 13F AON SHS CL A G0408V102 0 -4,059 -100.00 0 -100.00
2017-08-14 2017-06-30 13F AON SHS CL A G0408V102 4,059 4,059 540 0.1028
2017-02-14 2016-12-31 13F AON SHS CL A G0408V102 0 -2,975 -100.00 0 -100.00
2016-11-14 2016-09-30 13F AON SHS CL A G0408V102 2,975 2,975 335 0.1141
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
(%)
2025-02-14 2024-12-31 13F AON SHS CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F AON SHS CL A Call 6,000 400.00 2,076 489.49 n/a n/a n/a
2024-08-14 2024-06-30 13F AON SHS CL A Call 1,200 -29.41 352 -37.92 n/a n/a n/a
2024-05-15 2024-03-31 13F AON SHS CL A Call 1,700 -61.36 567 -55.70 n/a n/a n/a
2024-02-14 2023-12-31 13F AON SHS CL A Call 4,400 10.00 1,280 -1.23 n/a n/a n/a
2023-11-14 2023-09-30 13F AON SHS CL A Call 4,000 -38.46 1,297 -42.22 n/a n/a n/a
2023-08-14 2023-06-30 13F AON SHS CL A Call 6,500 0.00 2,244 9.47 n/a n/a n/a
2023-05-15 2023-03-31 13F AON SHS CL A Call 6,500 712.50 2,049 753.75 n/a n/a n/a
2023-02-14 2022-12-31 13F AON SHS CL A Call 800 -70.37 240 -66.80 n/a n/a n/a
2022-11-14 2022-09-30 13F AON SHS CL A Call 2,700 -28.95 723 -29.46 n/a n/a n/a
2022-08-15 2022-06-30 13F AON SHS CL A Call 3,800 280.00 1,025 214.42 n/a n/a n/a
2022-05-16 2022-03-31 13F AON SHS CL A Call 1,000 326 n/a n/a n/a
2021-02-16 2020-12-31 13F AON SHS CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-16 2020-09-30 13F AON SHS CL A Call 5,500 -22.54 1,135 -16.97 n/a n/a n/a
2020-09-10 2020-06-30 13F/A AON SHS CL A Call 7,100 29.09 1,367 20.44 n/a n/a n/a
2020-05-15 2020-03-31 13F AON SHS CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-14 2019-12-31 13F AON SHS CL A Call 4,400 29.41 916 39.21 n/a n/a n/a
2019-11-14 2019-09-30 13F AON CALL Call 3,400 -74.44 658 -74.37 n/a n/a n/a
2019-08-14 2019-06-30 13F AON SHS CL A Call 13,300 -11.92 2,567 -0.43 n/a n/a n/a
2019-05-15 2019-03-31 13F AON SHS CL A Call 15,100 -24.88 2,578 -11.77 n/a n/a n/a
2019-02-14 2018-12-31 13F AON SHS CL A Call 20,100 -30.45 2,922 -34.25 n/a n/a n/a
2018-11-14 2018-09-30 13F AON SHS CL A Call 28,900 1.76 4,444 14.07 n/a n/a n/a
2018-08-14 2018-06-30 13F AON SHS CL A Call 28,400 136.67 3,896 131.35 n/a n/a n/a
2018-05-15 2018-03-31 13F AON SHS CL A Call 12,000 1,684 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
(%)
2025-08-14 2025-06-30 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F AON SHS CL A Put 1,000 0.00 399 11.14 n/a n/a n/a
2025-02-14 2024-12-31 13F AON SHS CL A Put 1,000 0.00 359 4.06 n/a n/a n/a
2024-11-14 2024-09-30 13F AON SHS CL A Put 1,000 -56.52 346 -48.89 n/a n/a n/a
2024-08-14 2024-06-30 13F AON SHS CL A Put 2,300 -20.69 675 -30.20 n/a n/a n/a
2024-05-15 2024-03-31 13F AON SHS CL A Put 2,900 -12.12 968 0.73 n/a n/a n/a
2024-02-14 2023-12-31 13F AON SHS CL A Put 3,300 -5.71 960 -15.34 n/a n/a n/a
2023-11-14 2023-09-30 13F AON SHS CL A Put 3,500 -56.79 1,135 -59.44 n/a n/a n/a
2023-08-14 2023-06-30 13F AON SHS CL A Put 8,100 65.31 2,796 81.09 n/a n/a n/a
2023-05-15 2023-03-31 13F AON SHS CL A Put 4,900 276.92 1,545 295.90 n/a n/a n/a
2023-02-14 2022-12-31 13F AON SHS CL A Put 1,300 390 n/a n/a n/a
2022-11-14 2022-09-30 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F AON SHS CL A Put 2,600 701 n/a n/a n/a
2022-05-16 2022-03-31 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F AON SHS CL A Put 900 271 n/a n/a n/a
2021-11-15 2021-09-30 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-16 2021-06-30 13F AON SHS CL A Put 6,600 1,576 n/a n/a n/a
2021-02-16 2020-12-31 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-16 2020-09-30 13F AON SHS CL A Put 1,600 330 n/a n/a n/a
2020-05-15 2020-03-31 13F AON SHS CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-14 2019-12-31 13F AON SHS CL A Put 12,100 317.24 2,520 349.20 n/a n/a n/a
2019-11-14 2019-09-30 13F AON PUT Put 2,900 38.10 561 38.52 n/a n/a n/a
2019-08-14 2019-06-30 13F AON SHS CL A Put 2,100 -25.00 405 -15.27 n/a n/a n/a
2019-05-15 2019-03-31 13F AON SHS CL A Put 2,800 -46.15 478 -36.77 n/a n/a n/a
2019-02-14 2018-12-31 13F AON SHS CL A Put 5,200 -60.00 756 -62.18 n/a n/a n/a
2018-11-14 2018-09-30 13F AON SHS CL A Put 13,000 35.42 1,999 51.78 n/a n/a n/a
2018-08-14 2018-06-30 13F AON SHS CL A Put 9,600 -58.62 1,317 -59.55 n/a n/a n/a
2018-05-15 2018-03-31 13F AON SHS CL A Put 23,200 3,256 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.