X0407 4 2023-05-31 0 0001408198 MSCI Inc. MSCI 0001205054 Kinney Catherine R MSCI INC. 7 WORLD TRADE CENTER, 250 GREENWICH ST. NEW YORK NY 10007 1 0 0 0 0 Common Stock 2023-05-31 4 A 0 60 0.00 A 13351 D Common Stock 6592 I By Catherine R. Kinney 2021 GRAT No. 2 Common Stock 3966 I By Catherine R. Kinney 2022 GRAT Shares acquired by the Reporting Person in connection with MSCI Inc.'s payment of a dividend. Pursuant to the MSCI Inc. Non-Employee Directors Deferral Plan, the Reporting Person has elected to defer receipt of the shares until the 60th day after such Reporting Person's "separation from service" as a director. The Reporting Person does not have a reportable beneficial interest in (a) 572 shares of the Company's common stock transferred to the Reporting Person's daughter as a bona fide gift in 2022 and (b) 572 shares of the Company's common stock transferred to the Reporting Person's son as a bona fide gift in 2022, in each case included in the Reporting Person's prior ownership reports, as such shares are held directly by the Reporting Person's daughter and son, who, in each case, do not share the Reporting Person's household. /s/ Cecilia Aza, attorney-in-fact 2023-06-02