MARSH & MCLENNAN COMPANIES, INC.(MMC)

Jan Siegmund — Director Compensation Arrangement | Appointed as an independent member of the Board of Directors, effective July 10, 2024; Appointed to the Board's Audit Committee; Compensated as a non-management director according to the 'Description of Compensation Arrangements for Independent Directors'; Compensation details are incorporated by reference to Exhibit 10.1 of the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2023

John Q. Doyle — Employment Agreement Amendment | Annual base salary increased to $1,500,000, effective April 1, 2024.; Annual target bonus opportunity of $3,750,000 commencing with the 2024 performance year (payable in 2025), with a range of 0% to 200% of target.; Annual target long-term incentive (LTI) award value of $13,750,000 commencing with the award to be made in 2024.; Access to a car and driver for business purposes and personal use, including work/home travel.; Access to corporate aircraft for personal travel with an aggregate incremental cost up to $130,000 per calendar year.; Letter Agreement dated November 10, 2022 continues to govern other terms of employment.

Mark C. McGivney — Employment Agreement Amendment | Annual base salary increased to $1,000,000, effective April 1, 2024.; Annual target bonus opportunity of $1,750,000 commencing with the 2024 performance year (payable in 2025), with a range of 0% to 200% of target.; Annual target long-term incentive (LTI) award value of $3,000,000 commencing with the award to be made in 2024.; Letter Agreement dated September 17, 2015 (as subsequently amended) continues to govern other terms of employment.

John Q. Doyle Stock Option – Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Grant FV $6,875,020, Exercise $200.468)

Mark C. McGivney Stock Option – Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Grant FV $1,725,042, Exercise $200.468)

Martin C. South Stock Option – Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Grant FV $1,400,022, Exercise $200.468)

Patrick Tomlinson Stock Option – Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Grant FV $1,000,049, Exercise $200.468)

Dean M. Klisura Stock Option – Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Grant FV $900,017, Exercise $200.468)