X0306 4 2021-06-02 0000062709 MARSH & MCLENNAN COMPANIES, INC. MMC 0001594473 McDonald Scott 1166 AVENUE OF THE AMERICAS NEW YORK NY 10036 1 President and CEO of OWG Common Stock 2021-06-02 4 M 0 56936 0 A 75699.4868 D Common Stock 2021-06-02 4 S 0 56936 138.94 D 18763.4868 D Common Stock 2021-06-02 4 M 0 55115 0 A 73878.4848 D Common Stock 2021-06-02 4 S 0 55115 138.969 D 18763.4868 D Stock Options (Right to Buy) 48.00 2021-06-02 4 M 0 56936 0 D 2024-02-23 Common Stock 56936 0 D Stock Options (Right to Buy) 56.84 2021-06-02 4 M 0 55115 0 D 2025-02-22 Common Stock 55115 0 D These options were granted on February 24, 2014 and vested in four equal annual installments on February 24th of 2015, 2016, 2017 and 2018. These options were granted on February 23, 2015 and vested in four equal annual installments on February 23rd of 2016, 2017, 2018 and 2019. /s/ Connnor Kuratek, Attorney-in-fact 2021-06-04