X0306 4 2022-08-08 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 2022-08-08 4 S 0 1217 500.85 D 31191 D Common Stock 2022-08-08 4 S 0 3783 501.65 D 27408 D This transaction was executed in multiple trades at prices ranging from $500.450 to $501.035. 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. This transaction was executed in multiple trades at prices ranging from $501.045 to $502.315. 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 2022-08-10