X0306 4 2015-02-28 0000062709 MARSH & MCLENNAN COMPANIES, INC. MMC 0001420864 Glaser Daniel S 1166 AVENUE OF THE AMERICAS NEW YORK NY 10036 1 1 President and CEO, MMC Common Stock 2015-02-28 4 M 0 124651 0 A 353919.9999 D Common Stock 2015-02-28 4 F 0 69583 56.99 D 284336.9999 D Restricted Stock Units 2015-02-28 4 M 0 124651 0 D Common Stock 124651 90325 D Vesting and distribution to reporting person of 124,651 shares underlying restricted stock units of which 69,583 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 124,651 shares underlying restricted stock units relate to 13,068 restricted stock units that were granted on February 24, 2012, 78,408 restricted stock units relating to performance stock units that were granted on February 24, 2012 for the performance period 2012-2014, 17,811 restricted stock units that were granted on February 25, 2013 and 15,364 restricted stock units that were granted on February 24, 2014. The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis. Not Applicable. /s/ Tiffany D. Wooley, Attorney-in-Fact 2015-03-03