# EDGAR Filing Document

**Accession Number:** 0001408198
**File Stem:** 0001408198-23-000027
**Filing Date:** 2023-3
**Character Count:** 2221
**Document Hash:** adc4feb5e91b6a6fe2948a1bcf687d2b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001408198-23-000027.hdr.sgml**: 20230315

**ACCESSION NUMBER**: 0001408198-23-000027

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20230315

**DATE AS OF CHANGE**: 20230315

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MSCI Inc.
- **CENTRAL INDEX KEY:** 0001408198
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-BUSINESS SERVICES, NEC [7389]
- **IRS NUMBER:** 134038723
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33812
- **FILM NUMBER:** 23734037

**BUSINESS ADDRESS:**
- **STREET 1:** 7 WORLD TRADE CENTER
- **STREET 2:** 250 GREENWICH STREET, 49TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10007
- **BUSINESS PHONE:** 212-804-3990

**MAIL ADDRESS:**
- **STREET 1:** 7 WORLD TRADE CENTER
- **STREET 2:** 250 GREENWICH STREET, 49TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10007

UNITED STATES<br>SECURITIES AND EXCHANGE COMMISSION<br>Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the<br>Securities Exchange Act of 1934 (Amendment No.)

☑ Filed by the Registrant ☐ Filed by a party other than the Registrant

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| | |
|:---|:---|
| CHECK THE APPROPRIATE BOX: | CHECK THE APPROPRIATE BOX: |
| ☐ | 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 under §240.14a-12 |

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![logoa.jpg](logoa.jpg)

**MSCI INC.**

(Name of Registrant as Specified In Its Charter)<br>(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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| | |
|:---|:---|
| PAYMENT OF FILING FEE (CHECK ALL BOXES THAT APPLY): | PAYMENT OF FILING FEE (CHECK ALL BOXES THAT APPLY): |
| ☑ | No fee required |
| ☐ | Fee paid previously with preliminary materials |
| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

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