X0306 4 2022-02-04 0 0001408198 MSCI Inc. MSCI 0001769683 Wiechmann Andrew C. MSCI INC. 7 WORLD TRADE CENTER, 250 GREENWICH ST. NEW YORK NY 10007 0 1 0 0 Chief Financial Officer Common Stock 2022-02-04 4 F 0 120 554.71 D 17418 D Common Stock 2022-02-06 4 F 0 94 554.71 D 17324 D Represents shares reacquired by MSCI Inc. to satisfy tax withholding obligations in connection with the vesting and conversion to shares of the first tranche of 216 restricted stock units ("RSUs") granted on February 4, 2021. Represents shares reacquired by MSCI Inc. to satisfy tax withholding obligations in connection with the vesting and conversion to shares of the second tranche of 169 RSUs granted on February 6, 2020. /s/ Cecilia Aza, attorney-in-fact 2022-02-08