<SEC-DOCUMENT>0001752724-20-249257-index.html : 20201125
<SEC-HEADER>0001752724-20-249257.hdr.sgml : 20201125
<ACCEPTANCE-DATETIME>20201125170237
ACCESSION NUMBER:		0001752724-20-249257
CONFORMED SUBMISSION TYPE:	NPORT-P
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200930
FILED AS OF DATE:		20201125
PERIOD START:           	20200930

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SEI INSTITUTIONAL MANAGED TRUST
		CENTRAL INDEX KEY:			0000804239
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		NPORT-P
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04878
		FILM NUMBER:		201351583

	BUSINESS ADDRESS:	
		STREET 1:		2 OLIVER ST
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
		BUSINESS PHONE:		8003455734

	MAIL ADDRESS:	
		STREET 1:		SEI INVESTMENTS
		STREET 2:		1 FREEDOM VALLEY DRIVE
		CITY:			OAKS
		STATE:			PA
		ZIP:			19456

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TRUSTFUNDS INSTITUTIONAL MANAGED TRUST
		DATE OF NAME CHANGE:	19890509
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000804239
<SERIES-ID>S000026000
<SERIES-NAME>SIMT Large Cap Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000078064
<CLASS-CONTRACT-NAME>Class F
<CLASS-CONTRACT-TICKER-SYMBOL>SLGAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000147400
<CLASS-CONTRACT-NAME>Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>SLYCX
</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>