X0306 4 2022-10-27 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 2022-10-27 4 S 0 322 453.13 D 27086 D Common Stock 2022-10-27 4 S 0 765 454.43 D 26321 D Common Stock 2022-10-27 4 S 0 1207 455.42 D 25114 D Common Stock 2022-10-27 4 S 0 2010 466.65 D 23104 D Common Stock 2022-10-27 4 S 0 342 457.26 D 22762 D Common Stock 2022-10-27 4 S 0 700 458.55 D 22062 D Common Stock 2022-10-27 4 S 0 1000 459.56 D 21062 D Common Stock 2022-10-27 4 S 0 903 460.70 D 20159 D Common Stock 2022-10-27 4 S 0 251 461.45 D 19908 D This transaction was executed in multiple trades at prices ranging from $452.88 to $453.735. 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 $453.93 to $454.86. 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 $454.9375 to $455.905. 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 $455.94 to $456.93. 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 $456.94 to $457.78. 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 $458.095 to $459.05. 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 $459.12 to $460.09. 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 $460.155 to $461.01. 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 $461.31 to $461.66. 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 2022-10-31