X0306 4 2019-02-13 0 0001408198 MSCI Inc. MSCI 0001204559 Crum Scott A MSCI INC. 7 WORLD TRADE CENTER, 250 GREENWICH ST. NEW YORK NY 10007 0 1 0 0 Chief Human Resources Officer Common Stock 2019-02-13 4 A 0 84111 0.00 A 96999 D Common Stock 2019-02-13 4 F 0 44764 174.87 D 52235 D Common Stock 2019-02-15 4 S 0 19000 175.14 D 33235 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 84,111 PSUs granted on February 10, 2016 (includes the performance adjustment as described above). This transaction was executed in multiple trades at prices ranging from $174.68 to $175.43. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the issuer or the security holders of the issuer full information regarding the number of shares and prices at which each transaction was effected. /s/ Cecilia Aza, attorney-in-fact 2019-02-15