<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>As filed with the Securities and Exchange Commission
on April 25, 2025</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>Registration No. 333-__________</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"></P>

<!-- Field: Rule-Page --><DIV STYLE="margin-top: 12pt; margin-bottom: 3pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 3pt solid; border-bottom: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"></P>

<DIV STYLE="padding: 1pt 0in 0in">

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B>&nbsp;</P>

</DIV>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549</B>&nbsp;</P>

<!-- Field: Rule-Page --><DIV STYLE="margin: 1pt 2.5in"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 16pt"><B>FORM S-8</B>&nbsp;</FONT></P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>REGISTRATION STATEMENT UNDER</B>&nbsp;</P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>THE SECURITIES ACT OF 1933</B></P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<!-- Field: Rule-Page --><DIV STYLE="margin: 1pt 2.5in"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>MSCI INC. </B></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact name of registrant as specified in its charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="vertical-align: bottom; width: 29%; font-size: 10pt; text-align: center"><B>Delaware<BR></B></TD>
    <TD STYLE="vertical-align: bottom; width: 44%; font-size: 10pt; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 27%; font-size: 10pt; text-align: center"><B>13-4038723</B></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 11pt; text-align: center"><FONT STYLE="font-size: 10pt">(State or other jurisdiction of <BR>
incorporation or organization)</FONT></TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 11pt; text-align: center"><FONT STYLE="font-size: 10pt">(I.R.S. Employer <BR>
Identification No.)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"><B>7 World Trade Center</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"><B>250 Greenwich Street,
    49th Floor</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"><B>New York, New York
    10007</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"></P></TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="font-size: 11pt; text-align: center"><FONT STYLE="font-size: 10pt">(Address of principal executive offices, including zip code)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="font-size: 10pt">&nbsp;</TD></TR>
  </TABLE>
<!-- Field: Rule-Page --><DIV STYLE="margin: 1pt 2.5in"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="3">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>MSCI Inc. 2025 Omnibus Incentive Plan</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Full title of the plan)</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Robert J. Gutowski</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>General Counsel and Head of Corporate Affairs</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>MSCI Inc. </B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"><B>7 World Trade Center</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"><B>250 Greenwich Street,
    49th Floor</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; background-color: white"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>New York, New York 10007</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 33%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 34%; padding-left: 11.4pt; font-size: 10pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 33%; font-size: 10pt">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 1.45pt 0pt 0; text-align: center"><I>With a copy to:</I>&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 27%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 48%">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Travis Triano</B>&nbsp;</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Davis Polk &amp; Wardwell LLP</B>&nbsp;</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>450 Lexington Ave</B>&nbsp;</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>New York, NY 10017</B>&nbsp;</P></TD>
    <TD STYLE="width: 25%; font-size: 10pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="font-size: 10pt; text-align: center"><B>(212) 450-3096</B></TD></TR>
  </TABLE>
<!-- Field: Rule-Page --><DIV STYLE="margin: 1pt 2.5in"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Indicate by check mark whether the registrant
is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company.
See the definitions of &ldquo;large accelerated filer,&rdquo; &ldquo;accelerated filer,&rdquo; &ldquo;smaller reporting company&rdquo;
and &ldquo;emerging growth company&rdquo; in Rule 12b-2 of the Exchange Act.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 27pt"><FONT STYLE="font-size: 10pt"><B>Large accelerated
filer </B></FONT><FONT STYLE="font-size: 10pt"><B>&#9;&#9746;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accelerated
filer </B></FONT>&#9744;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 27pt">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 27.5pt"><FONT STYLE="font-size: 10pt"><B>Non-accelerated filer &#9744;</B></FONT>
<FONT STYLE="font-size: 10pt"><B>(Do not check if a smaller reporting company)&#9;&nbsp;&nbsp;&nbsp;Smaller reporting company </B></FONT>&#9744;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 27.5pt">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 27.5pt; text-indent: 297pt"><FONT STYLE="font-size: 10pt"><B>Emerging
growth company&nbsp; </B></FONT>&#9744;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 27.5pt; text-indent: 297pt">&nbsp;</P>


<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">PART I</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">INFORMATION REQUIRED IN THE SECTION 10(a)
PROSPECTUS</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; background-color: white">The information specified
in Item 1 and Item 2 of Part I of Form S-8 is omitted <FONT STYLE="background-color: white">from this Registration Statement on Form S-8
(this &ldquo;Registration Statement&rdquo;) and is included in documents sent or provided to participants in the MSCI Inc. 2025 Omnibus
Incentive Plan (the &ldquo;Plan&rdquo;) covered by this Registration Statement in accordance with Rule 428 under the Securities Act of
1933, as amended (the &ldquo;Securities Act&rdquo;), and the introductory note to Part I of the Form&nbsp;S-8 instructions.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; background-color: white">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">PART II<BR>
<BR>
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Item 3. Incorporation of Documents by Reference.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">The following documents filed
with the Securities and Exchange Commission (the &ldquo;Commission&rdquo;) are incorporated herein by reference:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT STYLE="background-color: white">T</FONT>he
Registrant&rsquo;s Annual Report on Form 10-K for the year ended December 31, 2024 (File No. 001-33812), filed with the Commission on
February 7, 2025, including the sections of the Registrant&rsquo;s Definitive Proxy Statement on Schedule 14A for the Registrant&rsquo;s
2025 Annual Meeting of Stockholders, as filed with the Commission on March 12, 2025, incorporated by reference in the Annual Report;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All
other reports filed pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the &ldquo;Exchange Act&rdquo;)
since December 31, 2024, including the Registrant&rsquo;s Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2025, as
filed with the Commission on April 22, 2025, and the Registrant&rsquo;s Current Reports on Form 8-K, as filed with the Commission on January
30, 2025, January 31, 2025, February 25, 2025 and April 24, 2025; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">(c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
description of the Registrant&rsquo;s capital stock which is contained in the Registrant&rsquo;s Annual Report on Form 10-K for the year
ended December 31, 2024 (File No. 001-33812), filed with the Commission on February 7, 2025.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&#9;<FONT STYLE="font-size: 10pt">In
addition, all documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act and prior
to the filing of a post-effective amendment to this Registration Statement which indicates that all securities offered have been sold,
or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference in the Registration Statement
and to be part thereof from the date of filing of such documents. The Registrant is not incorporating by reference any documents or portions
thereof, whether specifically listed above or filed in the future, that are not deemed &ldquo;filed&rdquo; with the Commission.</FONT></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Any statement contained in
this Registration Statement, in an amendment hereto or in a document incorporated or deemed to be incorporated by reference herein shall
be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or
in any other subsequently filed document which also is deemed to be incorporated by reference herein modifies or supersedes such statement.
Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration
Statement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Item 4. Description of Securities.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Item 5. Interests of Named Experts and Counsel.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>


<!-- Field: Page; Sequence: 2 -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Item 6. Indemnification of Directors and Officers.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">The following is only a general
summary of certain aspects of Delaware law and the Registrant&rsquo;s Third Amended and Restated Certificate of Incorporation (the &ldquo;Certificate
of Incorporation&rdquo;) and Amended and Restated Bylaws (the &ldquo;Bylaws&rdquo;) related to indemnification of the Registrant&rsquo;s
directors and officers, and does not purport to be complete. It is qualified in its entirety by reference to the detailed provisions of
Sections 145 and 102(b)(7) of the General Corporation Law of the State of Delaware (the &ldquo;DGCL&rdquo;), Articles 8 and 9 of the Certificate
of Incorporation and Section 6.07 of the Bylaws.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Section 145 of the DGCL generally
provides that all directors and officers (as well as other employees and individuals) may be indemnified by the corporation against expenses
(including attorneys&rsquo; fees), judgments, fines and amounts paid in settlement in connection with certain specified actions, suits
or proceedings, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation,
or a derivative action), if they acted in good faith and in a manner they reasonably believed to be in or not opposed to the best interests
of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe their conduct was unlawful.
A similar standard of care is applicable in the case of derivative actions, except that indemnification extends only to expenses (including
attorneys&rsquo; fees) incurred in connection with defense or settlement of an action, and the DGCL requires court approval before there
can be any indemnification where the person seeking indemnification has been found liable to the corporation. The Certificate of Incorporation
and the Bylaws provide that the Registrant will indemnify to the fullest extent permitted by the DGCL, and any other laws in effect, any
person who was or is made a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative by reason of the fact that he or she or a person of whom he or she is the legal
representative, is or was a director or officer of the Registrant or a director or officer of a subsidiary of the Registrant; provided
that the Registrant will indemnify such person in connection with a proceeding (or part thereof) initiated by such person only if such
proceeding (or part thereof) was authorized by the Registrant&rsquo;s board of directors or is a proceeding to enforce such person&rsquo;s
claim to indemnification pursuant to the rights granted in the Certificate of Incorporation and the Bylaws.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Section 145 of the DGCL also
provides that the rights conferred thereby are not exclusive of any other right to which any person may be entitled under any bylaw, agreement,
vote of stockholders or disinterested directors or otherwise, and permits a corporation to advance expenses to or on behalf of a person
entitled to be indemnified upon receipt of an undertaking to repay the amounts advanced if it is determined that the person is not entitled
to be indemnified. The Bylaws provide that the Registrant will advance expenses incurred by any person who may seek indemnification under
the Bylaws in defending any threatened or pending action, suit or proceeding in advance of its final disposition upon receipt of an undertaking
to repay such amounts (unless the Registrant&rsquo;s board of directors waives the requirement to the extent permitted by applicable law)
if it is ultimately determined that the indemnified person is not entitled to indemnification.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">The Certificate of Incorporation
and the Bylaws provide that no amendment or repeal of the provisions of the Certificate of Incorporation and the Bylaws relating to indemnification
and the advancement of expenses, nor to the fullest extent permitted by applicable law, any modification of law, will adversely affect
any right or protection existing at, or with respect to any events that occurred prior to, such amendment, repeal or modification.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Section 102(b)(7) of the
DGCL permits a corporation to provide in its certificate of incorporation that a director or officer of the corporation shall not be personally
liable to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director or officer, provided that
such provision shall not eliminate or limit the liability of (i) a director or officer for any breach of the director&rsquo;s or officer&rsquo;s
duty of loyalty to the corporation or its stockholders, (ii) a director or officer for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii) a director for unlawful payments of dividends or unlawful stock repurchases,
redemptions or other distributions, (iv) a director or officer for any transaction from which the director or officer derived an improper
personal benefit, or (v) an officer in any action by or in the right of the corporation. The Certificate of Incorporation provides for
such limitation of liability for directors of the Registrant.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>


<!-- Field: Page; Sequence: 3 -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Section 145(g) of the DGCL
provides, in general, that a corporation may purchase or maintain insurance on behalf of any person who is or was a director, officer,
employee or agent of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agents
of any other enterprise, against any liability asserted against, and incurred by, such person in any such capacity, or arising out of
such person&rsquo;s status as such, whether or not the corporation would have the power to indemnify such person against such liability
under Section 145 of the DGCL.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">The Registrant maintains
standard policies of insurance that insure directors and officers of the Registrant against liability asserted against such persons, whether
or not such directors or officers have the right to indemnification pursuant to the Certificate of Incorporation, the Bylaws or otherwise.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Item 7. Exemption from Registration Claimed.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&#9;Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Item 8. Exhibits.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; width: 14%; font-size: 12pt; text-align: center; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt"><B>Exhibit Number</B></FONT></TD>
    <TD STYLE="padding-top: 4pt; width: 86%; font-size: 12pt; text-align: center; padding-bottom: 4pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; font-size: 12pt; text-align: center; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1408198/000119312512212354/d324997dex31.htm">4.1</A></FONT></TD>
    <TD STYLE="padding-top: 4pt; font-size: 12pt; text-align: justify; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt; background-color: white"><A HREF="https://www.sec.gov/Archives/edgar/data/1408198/000119312512212354/d324997dex31.htm">Third Amended and Restated Certificate of Incorporation of MSCI Inc. (incorporated by reference to Exhibit 3.1 of the Registrant&rsquo;s Quarterly Report on Form 10-Q, filed with the Commission on May 4, 2012 (File No. 001-33812)).</A></FONT></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; font-size: 12pt; text-align: center; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1408198/000140819824000030/ex_3x2xmscibylawsx2024upda.htm">4.2</A></FONT></TD>
    <TD STYLE="padding-top: 4pt; font-size: 12pt; text-align: justify; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt; background-color: white"><A HREF="https://www.sec.gov/Archives/edgar/data/1408198/000140819824000030/ex_3x2xmscibylawsx2024upda.htm">Amended and Restated Bylaws of MSCI Inc. (incorporated by reference to Exhibit 3.2 of the Registrant&rsquo;s Annual Report on Form 10-K, filed with the Commission on February 9, 2024 (File No. 001-33812)).</A></FONT></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; font-size: 12pt; text-align: center; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt"><A HREF="dp227937_ex0501.htm">5.1*</A></FONT></TD>
    <TD STYLE="padding-top: 4pt; font-size: 12pt; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt; background-color: white"><A HREF="dp227937_ex0501.htm">Opinion of Davis Polk &amp; Wardwell LLP.</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; font-size: 12pt; text-align: center; padding-bottom: 4pt"><A HREF="dp227937_ex0501.htm"><FONT STYLE="font-size: 10pt">23.1*</FONT></A></TD>
    <TD STYLE="padding-top: 4pt; font-size: 12pt; padding-bottom: 4pt"><A HREF="dp227937_ex0501.htm"><FONT STYLE="font-size: 10pt; background-color: white">Consent of </FONT><FONT STYLE="font-size: 10pt">Davis Polk &amp; Wardwell LLP (included in Exhibit 5.1).</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; font-size: 12pt; text-align: center; padding-bottom: 4pt"><A HREF="dp227937_ex2301.htm"><FONT STYLE="font-size: 10pt">23.2*</FONT></A></TD>
    <TD STYLE="padding-top: 4pt; font-size: 12pt; padding-bottom: 4pt"><A HREF="dp227937_ex2301.htm"><FONT STYLE="font-size: 10pt; background-color: white">Consent of </FONT><FONT STYLE="font-size: 10pt">PricewaterhouseCoopers LLP.</FONT></FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; font-size: 12pt; text-align: center; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt"><A HREF="#a_001">24*</A></FONT></TD>
    <TD STYLE="padding-top: 4pt; padding-bottom: 4pt">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="background-color: white"><A HREF="#a_001">Power of Attorney (included on the signature page of this Registration Statement).</A></FONT></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; font-size: 11pt; text-align: center; padding-bottom: 4pt"><FONT STYLE="font-size: 10pt"><A HREF="dp227937_ex9901.htm">99.1*</A></FONT></TD>
    <TD STYLE="padding-top: 4pt; padding-bottom: 4pt">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><A HREF="dp227937_ex9901.htm">MSCI Inc. 2025 Omnibus Incentive Plan.</A></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 4pt; font-size: 11pt; text-align: center; padding-bottom: 4pt"><A HREF="dp227937_exfilingfees.htm"><FONT STYLE="font-size: 10pt">107.1*</FONT></A></TD>
    <TD STYLE="padding-top: 4pt; font-size: 11pt; padding-bottom: 4pt"><A HREF="dp227937_exfilingfees.htm"><FONT STYLE="font-size: 10pt">Filing Fee Table.</FONT></A></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">*Filed herewith.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">Item 9. Undertakings.</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
undersigned Registrant hereby undertakes:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: 0.25in">(1)&nbsp;&nbsp;&nbsp;To
file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: 0.25in">(i)&nbsp;&nbsp;&nbsp;To
include any prospectus required by Section 10(a)(3) of the Securities Act;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify; text-indent: 0.25in">(ii)&nbsp;&nbsp;To
reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective
amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this Registration
Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities
offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range
may be reflected in the</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify; text-indent: 0.25in">&nbsp;</P>


<!-- Field: Page; Sequence: 4 -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify; text-indent: 0in">form of prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change
in the maximum aggregate offering price set forth in the &ldquo;Calculation of Registration Fee&rdquo; table in this registration statement;
and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: 0.25in">(iii)&nbsp;&nbsp;&nbsp;To
include any material information with respect to the Plan not previously disclosed in this Registration Statement or any material change
to such information in this Registration Statement;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: 0in"><I>provided</I>,
<I>however</I>, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment
by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section 13
or Section 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: 0.25in">(2)&nbsp;&nbsp;&nbsp;That,
for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to
be the initial <I>bona fide</I> offering thereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: 0.25in">(3)&nbsp;&nbsp;&nbsp;To
remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination
of the offering.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">(b)&nbsp;&nbsp;&nbsp;The
undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the
Registrant&rsquo;s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of
an employee benefit plan&rsquo;s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this
Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering
of such securities at that time shall be deemed to be the initial <I>bona fide</I> offering thereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">(c)&nbsp;&nbsp;&nbsp;Insofar
as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the provisions referenced in Item&nbsp;6 of this Registration Statement, or otherwise, the Registrant has been
advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the
Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer, or controlling person of the Registrant in the successful
defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities
being registered hereunder, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question of whether such indemnification by it is against public policy as expressed
in the Securities Act and will be governed by the final adjudication of such issue.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>


<!-- Field: Page; Sequence: 5 -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SIGNATURES</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Pursuant to the requirements
of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing
on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized,
in New York, New York, on this 25th day of April, 2025.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 11pt"><FONT STYLE="font-size: 10pt"><B>MSCI Inc. </B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 11pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 11pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 11pt; text-align: left"><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD COLSPAN="2" STYLE="font: 10pt Times New Roman, Times, Serif; border-bottom: Black 1pt solid">/s/ Henry A. Fernandez</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="width: 4%; padding-left: 0.25in; font-size: 11pt">&nbsp;</TD>
    <TD STYLE="width: 7%; font-size: 11pt; text-align: justify"><FONT STYLE="font-size: 10pt">Name: </FONT></TD>
    <TD STYLE="width: 40%; font-size: 11pt"><FONT STYLE="font-size: 10pt">Henry A. Fernandez</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="padding-left: 0.25in; font-size: 11pt">&nbsp;</TD>
    <TD STYLE="font-size: 11pt; text-align: justify"><FONT STYLE="font-size: 10pt">Title:&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="font-size: 11pt"><FONT STYLE="font-size: 10pt">Chairman and Chief Executive Officer</FONT></TD></TR>
  </TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<!-- Field: Page; Sequence: 6 -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><A NAME="a_001" TITLE="POA"></A><BR STYLE="clear: both">
POWER OF ATTORNEY </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&#9;KNOW ALL PERSONS BY THESE
PRESENTS, that each person whose signature appears below, constitutes and appoints Andrew C. Wiechmann, Robert J. Gutowski and Cecilia
Aza, and each of them, our true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, to do any
and all acts and things and execute, in the name of the undersigned, any and all instruments which said attorneys-in-fact and agents may
deem necessary or advisable in order to enable MSCI Inc. to comply with the Securities Act of 1933, as amended, and any requirements of
the Securities and Exchange Commission in respect thereof, in connection with the filing with the Securities and Exchange Commission of
one or more registration statements on Form S-8 under the Securities Act of 1933, as amended, including, specifically, but without limitation,
power and authority to sign the name of the undersigned to any such registration statement, and any amendments to any such registration
statement (including post-effective amendments), and to file the same with all exhibits thereto and other documents in connection therewith,
with the Securities and Exchange Commission, to sign any and all applications, registration statements, notices or other documents necessary
or advisable to comply with applicable state securities laws, and to file the same, together with other documents in connection therewith
with the appropriate state securities authorities, granting unto said attorneys-in-fact and agents, and each of them, full power and authority
to do and to perform each and every act and thing requisite or necessary to be done in and about the premises, as fully and to all intents
and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents,
and any of them, or their substitutes, may lawfully do or cause to be done by virtue hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Pursuant to the requirements
of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons in the capacities and
on the dates indicated.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 33%; border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Signature</B></FONT></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 41%; border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Title</B></FONT></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 24%; border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Date</B></FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0">/s/ Henry A. Fernandez</P></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Chairman and Chief Executive Officer&nbsp;</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(principal executive officer)</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Henry A. Fernandez</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center">/s/ Andrew C. Wiechmann</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Chief Financial Officer&nbsp;</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(principal financial officer)</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Andrew C. Wiechmann</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: Black 1pt solid; text-align: center">/s/ C. Jack Read</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Chief Accounting Officer</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(principal accounting officer)</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">C. Jack Read</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center">/s/ Robert G. Ashe</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Robert G. Ashe</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center">/s/ Robin Matlock</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Robin Matlock</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center">/s/ Jacques P. Perold</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Jacques P. Perold</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center">/s/ C.D. Baer Pettit</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Director, President and Chief Operating Officer</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">C.D. Baer Pettit</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center">/s/ Sandy C. Rattray</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Sandy C. Rattray</FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center; width: 33%">/s/ Linda H. Riefler</TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center; width: 41%"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center; width: 24%"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Linda H. Riefler</P>

<P STYLE="margin: 0pt 0; font: 10pt Times New Roman, Times, Serif"></FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="vertical-align: bottom; border-bottom: Black 1pt solid; text-align: center; width: 33%">/s/ Michelle Seitz</TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center; width: 41%"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center; width: 24%"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Michelle Seitz</P>

<P STYLE="margin: 0pt 0; font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left"></P>

<!-- Field: Page; Sequence: 7 -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="vertical-align: bottom; width: 33%; border-bottom: Black 1pt solid; text-align: center">/s/ Marcus L. Smith</TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="width: 41%; text-align: center"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="width: 24%; text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Marcus L. Smith</FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt">/s/ Rajat
    Taneja</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Rajat Taneja</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: Black 1pt solid; text-align: center">/s/ Paula Volent</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">Paula Volent</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: Black 1pt solid; text-align: center">/s/ June Yang</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD ROWSPAN="2" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">April 25, 2025</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt">June Yang</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left"></P>


<!-- Field: Page; Sequence: 8; Options: Last -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0">&nbsp;</P>

</BODY>
</HTML>
[{"type": "S-8", "sequence": "1", "filename": "dp227937_s8.htm", "description": "FORM S-8", "secsgml_size_bytes": 60414}]
{"company-data": {"conformed-name": "MSCI Inc.", "cik": "0001408198", "assigned-sic": "7389", "organization-name": "07 Trade & Services", "ein": "134038723", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-286760", "film-number": "25874095"}, "business-address": {"street1": "7 WORLD TRADE CENTER", "street2": "250 GREENWICH STREET, 49TH FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10007", "phone": "212-804-3990"}, "mail-address": {"street1": "7 WORLD TRADE CENTER", "street2": "250 GREENWICH STREET, 49TH FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10007"}}
As filed with the Securities and Exchange Commission
on April 25, 2025
Registration No. 333-__________
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT UNDER
THE SECURITIES ACT OF 1933
MSCI INC.
(Exact name of registrant as specified in its charter)
Delaware
13-4038723
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer
Identification No.)
7 World Trade Center
250 Greenwich Street,
    49th Floor
New York, New York
    10007
(Address of principal executive offices, including zip code)
MSCI Inc. 2025 Omnibus Incentive Plan
(Full title of the plan)
Robert J. Gutowski
General Counsel and Head of Corporate Affairs
MSCI Inc.
7 World Trade Center
250 Greenwich Street,
    49th Floor
New York, New York 10007
With a copy to:
Travis Triano
Davis Polk & Wardwell LLP
450 Lexington Ave
New York, NY 10017
(212) 450-3096
Indicate by check mark whether the registrant
is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company.
See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company"
and "emerging growth company" in Rule 12b-2 of the Exchange Act.
Large accelerated
filer
☒          Accelerated
filer
☐
Non-accelerated filer ☐
(Do not check if a smaller reporting company)	   Smaller reporting company
☐
Emerging
growth company
☐
PART I
INFORMATION REQUIRED IN THE SECTION 10(a)
PROSPECTUS
The information specified
in Item 1 and Item 2 of Part I of Form S-8 is omitted
from this Registration Statement on Form S-8
(this "Registration Statement") and is included in documents sent or provided to participants in the MSCI Inc. 2025 Omnibus
Incentive Plan (the "Plan") covered by this Registration Statement in accordance with Rule 428 under the Securities Act of
1933, as amended (the "Securities Act"), and the introductory note to Part I of the Form S-8 instructions.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3. Incorporation of Documents by Reference.
The following documents filed
with the Securities and Exchange Commission (the "Commission") are incorporated herein by reference:
(a)
T
he
Registrant's Annual Report on Form 10-K for the year ended December 31, 2024 (File No. 001-33812), filed with the Commission on
February 7, 2025, including the sections of the Registrant's Definitive Proxy Statement on Schedule 14A for the Registrant's
2025 Annual Meeting of Stockholders, as filed with the Commission on March 12, 2025, incorporated by reference in the Annual Report;
(b)     All
other reports filed pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")
since December 31, 2024, including the Registrant's Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2025, as
filed with the Commission on April 22, 2025, and the Registrant's Current Reports on Form 8-K, as filed with the Commission on January
30, 2025, January 31, 2025, February 25, 2025 and April 24, 2025; and
(c)     The
description of the Registrant's capital stock which is contained in the Registrant's Annual Report on Form 10-K for the year
ended December 31, 2024 (File No. 001-33812), filed with the Commission on February 7, 2025.
In
addition, all documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act and prior
to the filing of a post-effective amendment to this Registration Statement which indicates that all securities offered have been sold,
or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference in the Registration Statement
and to be part thereof from the date of filing of such documents. The Registrant is not incorporating by reference any documents or portions
thereof, whether specifically listed above or filed in the future, that are not deemed "filed" with the Commission.
Any statement contained in
this Registration Statement, in an amendment hereto or in a document incorporated or deemed to be incorporated by reference herein shall
be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or
in any other subsequently filed document which also is deemed to be incorporated by reference herein modifies or supersedes such statement.
Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration
Statement.
Item 4. Description of Securities.
Not applicable.
Item 5. Interests of Named Experts and Counsel.
Not applicable.
Item 6. Indemnification of Directors and Officers.
The following is only a general
summary of certain aspects of Delaware law and the Registrant's Third Amended and Restated Certificate of Incorporation (the "Certificate
of Incorporation") and Amended and Restated Bylaws (the "Bylaws") related to indemnification of the Registrant's
directors and officers, and does not purport to be complete. It is qualified in its entirety by reference to the detailed provisions of
Sections 145 and 102(b)(7) of the General Corporation Law of the State of Delaware (the "DGCL"), Articles 8 and 9 of the Certificate
of Incorporation and Section 6.07 of the Bylaws.
Section 145 of the DGCL generally
provides that all directors and officers (as well as other employees and individuals) may be indemnified by the corporation against expenses
(including attorneys' fees), judgments, fines and amounts paid in settlement in connection with certain specified actions, suits
or proceedings, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation,
or a derivative action), if they acted in good faith and in a manner they reasonably believed to be in or not opposed to the best interests
of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe their conduct was unlawful.
A similar standard of care is applicable in the case of derivative actions, except that indemnification extends only to expenses (including
attorneys' fees) incurred in connection with defense or settlement of an action, and the DGCL requires court approval before there
can be any indemnification where the person seeking indemnification has been found liable to the corporation. The Certificate of Incorporation
and the Bylaws provide that the Registrant will indemnify to the fullest extent permitted by the DGCL, and any other laws in effect, any
person who was or is made a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative by reason of the fact that he or she or a person of whom he or she is the legal
representative, is or was a director or officer of the Registrant or a director or officer of a subsidiary of the Registrant; provided
that the Registrant will indemnify such person in connection with a proceeding (or part thereof) initiated by such person only if such
proceeding (or part thereof) was authorized by the Registrant's board of directors or is a proceeding to enforce such person's
claim to indemnification pursuant to the rights granted in the Certificate of Incorporation and the Bylaws.
Section 145 of the DGCL also
provides that the rights conferred thereby are not exclusive of any other right to which any person may be entitled under any bylaw, agreement,
vote of stockholders or disinterested directors or otherwise, and permits a corporation to advance expenses to or on behalf of a person
entitled to be indemnified upon receipt of an undertaking to repay the amounts advanced if it is determined that the person is not entitled
to be indemnified. The Bylaws provide that the Registrant will advance expenses incurred by any person who may seek indemnification under
the Bylaws in defending any threatened or pending action, suit or proceeding in advance of its final disposition upon receipt of an undertaking
to repay such amounts (unless the Registrant's board of directors waives the requirement to the extent permitted by applicable law)
if it is ultimately determined that the indemnified person is not entitled to indemnification.
The Certificate of Incorporation
and the Bylaws provide that no amendment or repeal of the provisions of the Certificate of Incorporation and the Bylaws relating to indemnification
and the advancement of expenses, nor to the fullest extent permitted by applicable law, any modification of law, will adversely affect
any right or protection existing at, or with respect to any events that occurred prior to, such amendment, repeal or modification.
Section 102(b)(7) of the
DGCL permits a corporation to provide in its certificate of incorporation that a director or officer of the corporation shall not be personally
liable to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director or officer, provided that
such provision shall not eliminate or limit the liability of (i) a director or officer for any breach of the director's or officer's
duty of loyalty to the corporation or its stockholders, (ii) a director or officer for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii) a director for unlawful payments of dividends or unlawful stock repurchases,
redemptions or other distributions, (iv) a director or officer for any transaction from which the director or officer derived an improper
personal benefit, or (v) an officer in any action by or in the right of the corporation. The Certificate of Incorporation provides for
such limitation of liability for directors of the Registrant.
Section 145(g) of the DGCL
provides, in general, that a corporation may purchase or maintain insurance on behalf of any person who is or was a director, officer,
employee or agent of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agents
of any other enterprise, against any liability asserted against, and incurred by, such person in any such capacity, or arising out of
such person's status as such, whether or not the corporation would have the power to indemnify such person against such liability
under Section 145 of the DGCL.
The Registrant maintains
standard policies of insurance that insure directors and officers of the Registrant against liability asserted against such persons, whether
or not such directors or officers have the right to indemnification pursuant to the Certificate of Incorporation, the Bylaws or otherwise.
Item 7. Exemption from Registration Claimed.
Not applicable.
Item 8. Exhibits.
Exhibit Number
4.1
Third Amended and Restated Certificate of Incorporation of MSCI Inc. (incorporated by reference to Exhibit 3.1 of the Registrant's Quarterly Report on Form 10-Q, filed with the Commission on May 4, 2012 (File No. 001-33812)).
4.2
Amended and Restated Bylaws of MSCI Inc. (incorporated by reference to Exhibit 3.2 of the Registrant's Annual Report on Form 10-K, filed with the Commission on February 9, 2024 (File No. 001-33812)).
5.1*
Opinion of Davis Polk & Wardwell LLP.
23.1*
Consent of
Davis Polk & Wardwell LLP (included in Exhibit 5.1).
23.2*
Consent of
PricewaterhouseCoopers LLP.
24*
Power of Attorney (included on the signature page of this Registration Statement).
99.1*
MSCI Inc. 2025 Omnibus Incentive Plan.
107.1*
Filing Fee Table.
*Filed herewith.
Item 9. Undertakings.
(a)     The
undersigned Registrant hereby undertakes:
(1)   To
file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:
(i)   To
include any prospectus required by Section 10(a)(3) of the Securities Act;
(ii)  To
reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective
amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this Registration
Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities
offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range
may be reflected in the
form of prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change
in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in this registration statement;
and
(iii)   To
include any material information with respect to the Plan not previously disclosed in this Registration Statement or any material change
to such information in this Registration Statement;
provided
,
however
, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment
by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section 13
or Section 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement.
(2)   That,
for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to
be the initial
bona fide
offering thereof.
(3)   To
remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination
of the offering.
(b)   The
undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of
an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this
Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering
of such securities at that time shall be deemed to be the initial
bona fide
offering thereof.
(c)   Insofar
as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the provisions referenced in Item 6 of this Registration Statement, or otherwise, the Registrant has been
advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the
Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer, or controlling person of the Registrant in the successful
defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities
being registered hereunder, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question of whether such indemnification by it is against public policy as expressed
in the Securities Act and will be governed by the final adjudication of such issue.
SIGNATURES
Pursuant to the requirements
of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing
on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized,
in New York, New York, on this 25th day of April, 2025.
MSCI Inc.
By:
/s/ Henry A. Fernandez
Name:
Henry A. Fernandez
Title:
Chairman and Chief Executive Officer
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE
PRESENTS, that each person whose signature appears below, constitutes and appoints Andrew C. Wiechmann, Robert J. Gutowski and Cecilia
Aza, and each of them, our true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, to do any
and all acts and things and execute, in the name of the undersigned, any and all instruments which said attorneys-in-fact and agents may
deem necessary or advisable in order to enable MSCI Inc. to comply with the Securities Act of 1933, as amended, and any requirements of
the Securities and Exchange Commission in respect thereof, in connection with the filing with the Securities and Exchange Commission of
one or more registration statements on Form S-8 under the Securities Act of 1933, as amended, including, specifically, but without limitation,
power and authority to sign the name of the undersigned to any such registration statement, and any amendments to any such registration
statement (including post-effective amendments), and to file the same with all exhibits thereto and other documents in connection therewith,
with the Securities and Exchange Commission, to sign any and all applications, registration statements, notices or other documents necessary
or advisable to comply with applicable state securities laws, and to file the same, together with other documents in connection therewith
with the appropriate state securities authorities, granting unto said attorneys-in-fact and agents, and each of them, full power and authority
to do and to perform each and every act and thing requisite or necessary to be done in and about the premises, as fully and to all intents
and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents,
and any of them, or their substitutes, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements
of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons in the capacities and
on the dates indicated.
Signature
Title
Date
/s/ Henry A. Fernandez
Chairman and Chief Executive Officer
(principal executive officer)
April 25, 2025
Henry A. Fernandez
/s/ Andrew C. Wiechmann
Chief Financial Officer
(principal financial officer)
April 25, 2025
Andrew C. Wiechmann
/s/ C. Jack Read
Chief Accounting Officer
(principal accounting officer)
April 25, 2025
C. Jack Read
/s/ Robert G. Ashe
Director
April 25, 2025
Robert G. Ashe
/s/ Robin Matlock
Director
April 25, 2025
Robin Matlock
/s/ Jacques P. Perold
Director
April 25, 2025
Jacques P. Perold
/s/ C.D. Baer Pettit
Director, President and Chief Operating Officer
April 25, 2025
C.D. Baer Pettit
/s/ Sandy C. Rattray
Director
April 25, 2025
Sandy C. Rattray
/s/ Linda H. Riefler
Director
April 25, 2025
Linda H. Riefler
/s/ Michelle Seitz
Director
April 25, 2025
Michelle Seitz
/s/ Marcus L. Smith
Director
April 25, 2025
Marcus L. Smith
/s/ Rajat
    Taneja
Director
April 25, 2025
Rajat Taneja
/s/ Paula Volent
Director
April 25, 2025
Paula Volent
/s/ June Yang
Director
April 25, 2025
June Yang