X0305 4 2012-04-10 0001408198 MSCI Inc. MSCI 0001120741 OBSTLER DAVID M MSCI INC. ONE CHASE MANHATTAN PLAZA, 44TH FL NEW YORK NY 10005 0 1 0 0 Chief Financial Officer Class A Common Stock 2012-04-10 4 M 0 10000 6.62 A 43695 D Class A Common Stock 2012-04-10 4 S 0 10000 36.41 D 33695 D Class A Common Stock 2012-04-12 4 M 0 5000 6.62 A 38695 D Class A Common Stock 2012-04-12 4 S 0 5000 36.00 D 33695 D Option to purchase Class A Common Stock 6.62 2012-04-10 4 M 0 10000 0 D 2015-01-28 Class A Common Stock 10000 117563 D Option to purchase Class A Common Stock 6.62 2012-04-12 4 M 0 5000 0 D 2015-01-28 Class A Common Stock 5000 112563 D This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 9, 2011. This transaction was executed in multiple trades at prices ranging from $36.17 to $36.60. The price reported above reflects the weighted average purchase 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. The options vested in four approximately equal installments on January 28, 2006, 2007, 2008 and 2009. Following the transaction reported on this Form 4, the Reporting Person holds 253,887 vested options and 5,445 unvested options to acquire MSCI class A common stock. Please see the Form 4 filed by the Reporting Person on June 3, 2010 and the ownership amounts reported therein, as amended by subsequent Form 4 filings, for additional information on all classes of derivative securities beneficially owned by the Reporting Person. /s/ David M. Obstler 2012-04-12