X0306 4 2019-02-14 0 0000315293 Aon plc AON 0001419356 Davies Christa 200 EAST RANDOLPH ST. CHICAGO IL 0 1 0 0 Chief Financial Officer Class A Ordinary Stock 2019-02-14 4 A 0 56329 A 288016 D Class A Ordinary Stock 2019-02-14 4 F 0 22177 169.62 D 265839 D Class A Ordinary Stock 2019-02-14 4 S 0 13966 170.60 D 251873 D Class A Ordinary Stock 2019-02-14 4 S 0 10034 170.40 D 241839 D Class A Ordinary Stock 2019-02-15 4 M 0 1192 A 243031 D Class A Ordinary Stock 2019-02-15 4 F 0 470 171.97 D 242561 D Class A Ordinary Stock 2019-02-15 4 M 0 1592 A 244153 D Class A Ordinary Stock 2019-02-15 4 F 0 627 171.97 D 243526 D Class A Ordinary Stock 2019-02-15 4 M 0 1974 A 245500 D Class A Ordinary Stock 2019-02-15 4 F 0 777 171.97 D 244723 D Class A Ordinary Stock 2019-02-15 4 S 0 22704 170.93 D 222019 D Class A Ordinary Stock 2019-02-15 4 S 0 11448 171.67 D 210571 D Restrictive Share Unit (Right to Receive) 2019-02-14 4 A 0 3301 0.00 A 2022-02-14 Class A Ordinary Shares 3301 3301 D Restricted Share Unit (Right to Receive) 2019-02-15 4 M 0 1974 0.00 D 2019-02-18 Class A Ordinary Shares 0 0 D Restricted Share Unit (Right to Receive) 2019-02-15 4 M 0 1591 0.00 D 2020-02-16 Class A Ordinary Shares 1591 1593 D Restricted Share Unit (Right to Receive) 2019-02-15 4 M 0 1192 0.00 D 2021-02-15 Class A Ordinary Shares 2385 2385 D Represents Class A Ordinary Shares upon the settlement of performance share unit awards originally granted approximately three years ago under the eleventh cycle of the Company's Leadership Performance Program. The number of shares issued was determined by the Organization and Compensation Committee of the Board of Directors on February 14, 2019, based on the Company's performance for the period from January 1, 2016 to December 31, 2018. Class A Ordinary Shares withheld by the issuer for payment of withholding taxes in connection with the vesting of the award. The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $170.12 to $171.09, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer. The transactions reported were effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on October 31, 2018. The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $171.12 to $171.65, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer. Class A Ordinary Shares acquired upon the vesting of a restricted share unit award. The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $170.36 to $171.35, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer. The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $171.36 to $172.09, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with U.K. law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person. The restricted share unit award vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan as follows: 33 1/3% of the award vests on each of the first through third anniversary of the date of the grant. A restricted share unit award was granted on February 18, 2016 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 33 1/3% of the award vests on each of the first through third anniversary of the date of grant. A restricted share unit award was granted on February 16, 2017 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 33 1/3% of the award vests on each of the first through third anniversary of the date of grant. A restricted share unit award was granted on February 15, 2018 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 33 1/3% of the award vests on each of the first through third anniversary of the date of grant. /s/ Molly Johnson- Molly Johnson pursuant to power of attorney from Christa Davies 2019-02-20