X0306 4 2019-02-13 0 0001408198 MSCI Inc. MSCI 0001416752 Pettit CD Baer MSCI INC. 7 WORLD TRADE CENTER, 250 GREENWICH ST NEW YORK NY 10007 0 1 0 0 President Common Stock 2019-02-13 4 A 0 236103 0.00 A 412787 D Common Stock 2019-02-13 4 F 0 110969 174.87 D 301818 D Represents the number of shares of common stock issued following the vesting and conversion of PSUs granted to the reporting person on February 10, 2016, upon certification by the Compensation & Talent Management Committee on February 13, 2019 of the achievement of the performance metric for the performance period from February 9, 2016 to February 8, 2019. Represents shares reacquired by MSCI Inc. to satisfy tax withholding obligations in connection with the vesting and conversion to shares of 236,103 PSUs granted on February 10, 2016 (includes the performance adjustment as described above). /s/ Cecilia Aza, attorney-in-fact 2019-02-15