<SEC-DOCUMENT>0001752724-21-281458-index.html : 20211227
<SEC-HEADER>0001752724-21-281458.hdr.sgml : 20211227
<ACCEPTANCE-DATETIME>20211227124425
ACCESSION NUMBER:		0001752724-21-281458
CONFORMED SUBMISSION TYPE:	NPORT-P
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20211031
FILED AS OF DATE:		20211227
PERIOD START:           	20211031

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALGER INSTITUTIONAL FUNDS
		CENTRAL INDEX KEY:			0000911415
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		NPORT-P
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-07986
		FILM NUMBER:		211519660

	BUSINESS ADDRESS:	
		STREET 1:		100 PEARL STREET
		STREET 2:		27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10004
		BUSINESS PHONE:		212-806-8800

	MAIL ADDRESS:	
		STREET 1:		100 PEARL STREET
		STREET 2:		27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10004

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALGER INSTITUTIONAL FUND
		DATE OF NAME CHANGE:	20020228

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALGER RETIREMENT FUND
		DATE OF NAME CHANGE:	19960515

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALGER DEFINED CONTRIBUTION TRUST
		DATE OF NAME CHANGE:	19930830
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000911415
<SERIES-ID>S000009202
<SERIES-NAME>Alger Small Cap Growth Institutional Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000025000
<CLASS-CONTRACT-NAME>Alger Small Cap Growth Institutional Fund Class I
<CLASS-CONTRACT-TICKER-SYMBOL>ALSRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000025001
<CLASS-CONTRACT-NAME>Alger Small Cap Growth Institutional Fund Class R
<CLASS-CONTRACT-TICKER-SYMBOL>ASIRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000172687
<CLASS-CONTRACT-NAME>Alger Small Cap Growth Institutional Fund Class Z-2
<CLASS-CONTRACT-TICKER-SYMBOL>AISZX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>NPORT-P
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>