<SEC-DOCUMENT>0001133228-21-000613-index.html : 20231019
<SEC-HEADER>0001133228-21-000613.hdr.sgml : 20231019

<ACCEPTANCE-DATETIME>20210205164517

<PRIVATE-TO-PUBLIC>

ACCESSION NUMBER:		0001133228-21-000613

CONFORMED SUBMISSION TYPE:	485APOS

PUBLIC DOCUMENT COUNT:		6

FILED AS OF DATE:		20210205

DATE AS OF CHANGE:		20210603


FILER:


	COMPANY DATA:	

		COMPANY CONFORMED NAME:			MORGAN STANLEY INSTITUTIONAL FUND INC

		CENTRAL INDEX KEY:			0000836487

		IRS NUMBER:				000000000

		STATE OF INCORPORATION:			MD

		FISCAL YEAR END:			1231



	FILING VALUES:

		FORM TYPE:		485APOS

		SEC ACT:		1940 Act

		SEC FILE NUMBER:	811-05624

		FILM NUMBER:		21596642



	BUSINESS ADDRESS:	

		STREET 1:		522 FIFTH AVENUE

		CITY:			NEW YORK

		STATE:			NY

		ZIP:			10036

		BUSINESS PHONE:		800-548-7786



	MAIL ADDRESS:	

		STREET 1:		522 FIFTH AVENUE

		CITY:			NEW YORK

		STATE:			NY

		ZIP:			10036



	FORMER COMPANY:	

		FORMER CONFORMED NAME:	MORGAN STANLEY DEAN WITTER INSTITUTIONAL FUND INC

		DATE OF NAME CHANGE:	19990329



	FORMER COMPANY:	

		FORMER CONFORMED NAME:	MORGAN STANLEY INSTITUTIONAL FUND INC

		DATE OF NAME CHANGE:	19920703




FILER:


	COMPANY DATA:	

		COMPANY CONFORMED NAME:			MORGAN STANLEY INSTITUTIONAL FUND INC

		CENTRAL INDEX KEY:			0000836487

		IRS NUMBER:				000000000

		STATE OF INCORPORATION:			MD

		FISCAL YEAR END:			1231



	FILING VALUES:

		FORM TYPE:		485APOS

		SEC ACT:		1933 Act

		SEC FILE NUMBER:	033-23166

		FILM NUMBER:		21596643



	BUSINESS ADDRESS:	

		STREET 1:		522 FIFTH AVENUE

		CITY:			NEW YORK

		STATE:			NY

		ZIP:			10036

		BUSINESS PHONE:		800-548-7786



	MAIL ADDRESS:	

		STREET 1:		522 FIFTH AVENUE

		CITY:			NEW YORK

		STATE:			NY

		ZIP:			10036



	FORMER COMPANY:	

		FORMER CONFORMED NAME:	MORGAN STANLEY DEAN WITTER INSTITUTIONAL FUND INC

		DATE OF NAME CHANGE:	19990329



	FORMER COMPANY:	

		FORMER CONFORMED NAME:	MORGAN STANLEY INSTITUTIONAL FUND INC

		DATE OF NAME CHANGE:	19920703



<SERIES-AND-CLASSES-CONTRACTS-DATA>

<NEW-SERIES-AND-CLASSES-CONTRACTS>

<OWNER-CIK>0000836487

<NEW-CLASSES-CONTRACTS>

<SERIES-ID>S000047473

<SERIES-NAME>Emerging Markets Leaders Portfolio

<CLASS-CONTRACT>

<CLASS-CONTRACT-ID>C000226932

<CLASS-CONTRACT-NAME>Class IR

</CLASS-CONTRACT>

</NEW-CLASSES-CONTRACTS>

</NEW-SERIES-AND-CLASSES-CONTRACTS>

</SERIES-AND-CLASSES-CONTRACTS-DATA>

</SEC-HEADER>

<DOCUMENT>
<TYPE>485APOS
<SEQUENCE>1
<FILENAME>msifi-html3324_485apos.htm
<DESCRIPTION>MS INSTITUTIONAL FUND INC_485APOS
<TEXT>
Document 1 - file: msifi-html3324_485apos.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>dechert.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: dechert.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>pr15120img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: pr15120img001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>pr15120img002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: pr15120img002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>sa15121img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: sa15121img001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>COVER
<SEQUENCE>7
<FILENAME>filename7.htm
<TEXT>
Document 7 - file: filename7.htm

</DOCUMENT>
</SEC-DOCUMENT>