AON

SEC source: 0001209191-23-009508 · doc4.xml · derivative · entry 6

Zeidel Darren · CIK 0001782945 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 112 shares

Expires 2023-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F5 · derivative.exercise_date: A restricted share unit award was granted on February 13, 2020 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.

F5 · derivative.expiration_date: A restricted share unit award was granted on February 13, 2020 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.

SEC source: 0001209191-23-009508 · doc4.xml · nonDerivative · entry 4

Zeidel Darren · CIK 0001782945 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,446

F2 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009508 · doc4.xml · nonDerivative · entry 3

Zeidel Darren · CIK 0001782945 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,496

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-23-009516 · doc4.xml · derivative · entry 6

Weitz Andy · CIK 0001786688 · Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 150 shares

Expires 2023-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F5 · derivative.exercise_date: A restricted share unit award was granted on February 13, 2020 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.

F5 · derivative.expiration_date: A restricted share unit award was granted on February 13, 2020 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.

SEC source: 0001209191-23-009516 · doc4.xml · nonDerivative · entry 4

Weitz Andy · CIK 0001786688 · Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,019

F2 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009516 · doc4.xml · nonDerivative · entry 3

Weitz Andy · CIK 0001786688 · Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,057

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-23-009506 · doc4.xml · nonDerivative · entry 3

Davies Christa · CIK 0001419356 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 199,571

F3 · price: The transaction reported was effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 23, 2022.

SEC source: 0001209191-23-009570 · doc4.xml · derivative · entry 11

Case Gregory C · CIK 0001322803 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,765

Underlying: Class A Ordinary Shares · 1,765 shares

Expires 2024-02-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F5 · derivative.exercise_date: A restricted share unit award was granted on February 12, 2021 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.

F5 · derivative.expiration_date: A restricted share unit award was granted on February 12, 2021 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.

SEC source: 0001209191-23-009570 · doc4.xml · nonDerivative · entry 7

Case Gregory C · CIK 0001322803 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 424,879

F3 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009570 · doc4.xml · nonDerivative · entry 6

Case Gregory C · CIK 0001322803 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 425,620

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F2 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-23-009528 · doc4.xml · derivative · entry 6

Neller Michael · CIK 0001732938 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 163

Underlying: Class A Ordinary Shares · 163 shares

Expires 2024-02-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F4 · derivative.exercise_date: A restricted share unit award was granted on February 11, 2021 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.

F4 · derivative.expiration_date: A restricted share unit award was granted on February 11, 2021 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.

SEC source: 0001209191-23-009528 · doc4.xml · nonDerivative · entry 2

Neller Michael · CIK 0001732938 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,138

F2 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009528 · doc4.xml · nonDerivative · entry 1

Neller Michael · CIK 0001732938 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,195

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-23-009568 · doc4.xml · derivative · entry 8

Stevens Lisa · CIK 0001792850 · Chief People Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 509

Underlying: Class A Ordinary Shares · 509 shares

Expires 2024-02-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F6 · derivative.exercise_date: A restricted share unit award was granted on February 11, 2021 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.

F6 · derivative.expiration_date: A restricted share unit award was granted on February 11, 2021 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.

SEC source: 0001209191-23-009568 · doc4.xml · nonDerivative · entry 5

Stevens Lisa · CIK 0001792850 · Chief People Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,665.4687

F4 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009568 · doc4.xml · nonDerivative · entry 4

Stevens Lisa · CIK 0001792850 · Chief People Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,853.4687

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F2 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F3 · balance_after: Includes shares acquired under Aon employee stock purchase plan on December 30, 2022.

SEC source: 0001209191-23-009508 · doc4.xml · derivative · entry 5

Zeidel Darren · CIK 0001782945 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 458

Underlying: Class A Ordinary Shares · 458 shares

Expires 2024-02-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F4 · derivative.exercise_date: A restricted share unit award was granted on February 11, 2021 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.

F4 · derivative.expiration_date: A restricted share unit award was granted on February 11, 2021 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.

SEC source: 0001209191-23-009508 · doc4.xml · nonDerivative · entry 2

Zeidel Darren · CIK 0001782945 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,384

F2 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009508 · doc4.xml · nonDerivative · entry 1

Zeidel Darren · CIK 0001782945 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,587

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-23-009516 · doc4.xml · derivative · entry 5

Weitz Andy · CIK 0001786688 · Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 306

Underlying: Class A Ordinary Shares · 305 shares

Expires 2024-02-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F4 · derivative.exercise_date: A restricted share unit award was granted on February 11, 2021 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.

F4 · derivative.expiration_date: A restricted share unit award was granted on February 11, 2021 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.

SEC source: 0001209191-23-009516 · doc4.xml · nonDerivative · entry 2

Weitz Andy · CIK 0001786688 · Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,907

F2 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009516 · doc4.xml · nonDerivative · entry 1

Weitz Andy · CIK 0001786688 · Chief Marketing Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,998

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-23-009506 · doc4.xml · derivative · entry 4

Davies Christa · CIK 0001419356 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,018

Underlying: Class A Ordinary Shares · 1,018 shares

Expires 2024-02-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F5 · derivative.exercise_date: A restricted share unit award was granted on February 11, 2021 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.

F5 · derivative.expiration_date: A restricted share unit award was granted on February 11, 2021 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.

SEC source: 0001209191-23-009506 · doc4.xml · nonDerivative · entry 2

Davies Christa · CIK 0001419356 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 200,188

F2 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009506 · doc4.xml · nonDerivative · entry 1

Davies Christa · CIK 0001419356 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 200,589

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-23-009320 · doc4.xml · derivative · entry 3

Andersen Eric · CIK 0001697695 · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 763

Underlying: Class A Ordinary Shares · 763 shares

Expires 2024-02-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F5 · derivative.exercise_date: A restricted share unit award was granted on February 11, 2021 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.

F5 · derivative.expiration_date: A restricted share unit award was granted on February 11, 2021 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.

SEC source: 0001209191-23-009320 · doc4.xml · nonDerivative · entry 2

Andersen Eric · CIK 0001697695 · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 124,309.9733

F3 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-23-009320 · doc4.xml · nonDerivative · entry 1

Andersen Eric · CIK 0001697695 · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 124,567.9733

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F2 · balance_after: Includes shares acquired under Aon employee stock purchase plan on June 30, 2022 and on December 30, 2022.

SEC source: 0001209191-23-009570 · doc4.xml · nonDerivative · entry 5

Case Gregory C · CIK 0001322803 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 423,855

F1 · balance_after: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

SEC source: 0001209191-23-009366 · doc5.xml · nonDerivative · entry 3

WOO CAROLYN Y · CIK 0001205211 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,820

SEC source: 0001209191-23-009366 · doc5.xml · nonDerivative · entry 2

WOO CAROLYN Y · CIK 0001205211 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,834

SEC source: 0001209191-23-009366 · doc5.xml · nonDerivative · entry 1

WOO CAROLYN Y · CIK 0001205211 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,854

SEC source: 0001209191-22-058419 · doc4.xml · nonDerivative · entry 1

Karaboutis Adriana · CIK 0001619963 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 497

F1 · kind: Class A Ordinary Shares granted annually to each non-employee director of Aon plc. In connection with the election of Ms. Adriana Karaboutis as a director of Aon plc effective September 8, 2022, the Board of Directors granted fully vested Aon plc Class A Ordinary Shares to Ms. Karaboutis to reflect pro-ration for the period of service from September 8, 2022 through June 16, 2023. In accordance with Irish law, reporting person agreed to pay the issuer the nominal value of US $0.01 per share issued to the reporting person.

F1 · price: Class A Ordinary Shares granted annually to each non-employee director of Aon plc. In connection with the election of Ms. Adriana Karaboutis as a director of Aon plc effective September 8, 2022, the Board of Directors granted fully vested Aon plc Class A Ordinary Shares to Ms. Karaboutis to reflect pro-ration for the period of service from September 8, 2022 through June 16, 2023. In accordance with Irish law, reporting person agreed to pay the issuer the nominal value of US $0.01 per share issued to the reporting person.

SEC source: 0001209191-23-009568 · doc4.xml · nonDerivative · entry 3

Stevens Lisa · CIK 0001792850 · Chief People Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,314.0464

SEC source: 0001209191-22-057675 · doc4.xml · derivative · entry 1

Simon Mindy F. · CIK 0001925598 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,910

Underlying: Class A Ordinary Shares · 5,910 shares

Expires 2025-11-15

F1 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

SEC source: 0001209191-23-009570 · doc4.xml · nonDerivative · entry 4

Case Gregory C · CIK 0001322803 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 145,485

F1 · kind: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

F1 · balance_after: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

SEC source: 0001209191-23-009570 · doc4.xml · nonDerivative · entry 3

Case Gregory C · CIK 0001322803 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 145,486

F1 · kind: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

F1 · balance_after: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

SEC source: 0001209191-23-009570 · doc4.xml · nonDerivative · entry 2

Case Gregory C · CIK 0001322803 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By GRAT

Disclosed balance after: 0

F1 · kind: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

F1 · balance_after: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

SEC source: 0001209191-23-009570 · doc4.xml · nonDerivative · entry 1

Case Gregory C · CIK 0001322803 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By GRAT

Disclosed balance after: 70,683

F1 · kind: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

F1 · balance_after: On November 10, 2022, the GRAT returned 141,311 shares to the reporting person as an annuity payment. Also on November 10, 2022, the GRAT transferred 70,684 and 70,683 shares to trusts reported as indirectly owned by the reporting person. On November 29, 2022, the reporting person contributed 400,000 shares previously held as direct to a new GRAT.

SEC source: 0001209191-22-050747 · doc4.xml · derivative · entry 3

Slyfield Jillian · CIK 0001898032 · Chief Innovation Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 185

Underlying: Class A Ordinary Shares · 92 shares

Expires 2024-09-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F4 · derivative.exercise_date: A restricted share unit award was granted on September 17, 2021 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 the grant.

F4 · derivative.expiration_date: A restricted share unit award was granted on September 17, 2021 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 the grant.

SEC source: 0001209191-22-050747 · doc4.xml · nonDerivative · entry 2

Slyfield Jillian · CIK 0001898032 · Chief Innovation Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 869.492

F2 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-22-050747 · doc4.xml · nonDerivative · entry 1

Slyfield Jillian · CIK 0001898032 · Chief Innovation Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 901.492

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-22-050744 · doc4.xml · derivative · entry 4

Neller Michael · CIK 0001732938 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 375

Underlying: Class A Ordinary Shares · 187 shares

Expires 2024-09-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F4 · derivative.exercise_date: A restricted share unit award was granted on September 17, 2021 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 the grant.

F4 · derivative.expiration_date: A restricted share unit award was granted on September 17, 2021 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 the grant.

SEC source: 0001209191-22-050744 · doc4.xml · nonDerivative · entry 2

Neller Michael · CIK 0001732938 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,032

F2 · kind: Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

SEC source: 0001209191-22-050744 · doc4.xml · nonDerivative · entry 1

Neller Michael · CIK 0001732938 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,115

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

F1 · price: Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

SEC source: 0001209191-22-047612 · doc4.xml · nonDerivative · entry 1

Spruell Byron · CIK 0001831278 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,743

SEC source: 0001209191-23-009568 · doc4.xml · nonDerivative · entry 2

Stevens Lisa · CIK 0001792850 · Chief People Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,305.8024

F1 · balance_after: Includes shares acquired under Aon employee stock purchase plan on June 30, 2022.

SEC source: 0001209191-23-009350 · doc5.xml · nonDerivative · entry 1

NOTEBAERT RICHARD C · CIK 0001112731 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,779

SEC source: 0001209191-22-045106 · doc4.xml · nonDerivative · entry 1

Neller Michael · CIK 0001732938 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · By LLC

Disclosed balance after: 2,636

F1 · price: 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 $284.32 to $284.45, 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.

SEC source: 0001209191-22-043673 · doc4.xml · nonDerivative · entry 1

Zeidel Darren · CIK 0001782945 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,129

F1 · price: The transactions reported were effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 23, 2021.