<SEC-DOCUMENT>0001752724-23-166364-index.html : 20230727
<SEC-HEADER>0001752724-23-166364.hdr.sgml : 20230727
<ACCEPTANCE-DATETIME>20230727162934
ACCESSION NUMBER:		0001752724-23-166364
CONFORMED SUBMISSION TYPE:	NPORT-P
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230531
FILED AS OF DATE:		20230727
DATE AS OF CHANGE:		20230727
PERIOD START:           	20230531

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SEI INSTITUTIONAL INVESTMENTS TRUST
		CENTRAL INDEX KEY:			0000939934
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0531

	FILING VALUES:
		FORM TYPE:		NPORT-P
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-07257
		FILM NUMBER:		231118880

	BUSINESS ADDRESS:	
		STREET 1:		1 FREEDOM VALLEY DRIVE
		CITY:			OAK
		STATE:			PA
		ZIP:			19456
		BUSINESS PHONE:		610 676-3097

	MAIL ADDRESS:	
		STREET 1:		1 FREEDOM VALLEY DRIVE
		CITY:			OAK
		STATE:			PA
		ZIP:			19456
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000939934
<SERIES-ID>S000006763
<SERIES-NAME>SIIT HIGH YIELD BOND FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018352
<CLASS-CONTRACT-NAME>SIIT HIGH YIELD BOND FUND - CLASS A
<CLASS-CONTRACT-TICKER-SYMBOL>SGYAX
</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>