MSCI (MSCI) DEFA14A Additional proxy soliciting materials

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant  ☒                             Filed by a Party other than the Registrant  ☐

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☐	Preliminary Proxy Statement
☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐	Definitive Proxy Statement
☒	Definitive Additional Materials
☐	Soliciting Material Pursuant to Section 240.14a-12

MSCI Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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*** Exercise YourRight to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on April 28, 2020.

	MSCI INC.
	MSCI INC. C/O BROADRIDGE P.O. BOX 1342 BRENTWOOD, NY 11717

		Meeting Information
		Meeting Type:            Annual Meeting
		For holders as of:       March 3, 2020
		Date:  April 28, 2020    Time:  2:30 P.M. Eastern Time
		Location:	Meeting live via the internet-please visit www.virtualshareholdermeeting.com/MSCI2020
		MSCI Inc. will be hosting the meeting live via the internet this year. To attend the meeting via the internet please visit www.virtualshareholdermeeting.com/MSCI2020 and be sure to have the information that is printed in the box marked by the arrow (located on the following page).
You are receiving this communication because you hold shares in the company named above.
This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting.
	See the reverse side of this notice to obtain proxy materials and voting instructions.

—  Before You Vote  —

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:
NOTICE AND PROXY STATEMENT        ANNUAL REPORT ON FORM10-K
How to View Online:
Have the information that is printed in the box marked by the arrow (located on the following page) and visit:www.proxyvote.com.
How to Request and Receive a PAPER orE-MAIL Copy:
If you want to receive a paper ore-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:
1)BY INTERNET:	www.proxyvote.com
2)BY TELEPHONE:	1-800-579-1639
3)BYE-MAIL*:	sendmaterial@proxyvote.com
*  If requesting materials bye-mail, please send a blanke-mail with the information that is printed in the box marked by the arrow (located on the following page) in the subject line.
Requests, instructions and other inquiries sent to thise-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before April 14, 2020 to facilitate timely delivery.

—  How To Vote  —

Please Choose One of the Following Voting Methods

	Vote By Internet:
		Before The Meeting:
			Go towww.proxyvote.com.Have the information that is printed in the box marked by the arrow (located on the following page) available and follow the instructions.
		During The Meeting:
			Go towww.virtualshareholdermeeting.com/MSCI2020. Have the information that is printed in the box marked by the arrow (located on the following page) available and follow the instructions.
	Vote By Mail:You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

Voting Items  

	The Board of Directors recommends you vote FOR the following:
	1.	Election of Directors Nominees: 1a.    Henry A. Fernandez 1b.    Robert G. Ashe 1c.    Benjamin F. duPont 1d.    Wayne Edmunds 1e.    Catherine R. Kinney 1f.     Jacques P. Perold 1g.    Sandy C. Rattray 1h.     Linda H. Riefler 1i.     Marcus L. Smith 1j.    Paula Volent	The Board of Directors recommends you vote FOR the following proposal: 2.  To approve, bynon-binding vote, our executive compensation, as described in these proxy materials. The Board of Directors recommends you vote FOR the following proposal: 3.  To ratify the appointment of PricewaterhouseCoopers LLP as independent auditor.
				NOTE:Such other business as may properly come before the meeting or any adjournment thereof.