SEC EDGAR Submission 0001752724-22-059708

<SEC-DOCUMENT>0001752724-22-059708-index.html : 20220314
<SEC-HEADER>0001752724-22-059708.hdr.sgml : 20220314
<ACCEPTANCE-DATETIME>20220314123807
ACCESSION NUMBER:		0001752724-22-059708
CONFORMED SUBMISSION TYPE:	N-CEN
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20211231
FILED AS OF DATE:		20220314
DATE AS OF CHANGE:		20220314
EFFECTIVENESS DATE:		20220314

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STATE STREET INSTITUTIONAL INVESTMENT TRUST
		CENTRAL INDEX KEY:			0001107414
		IRS NUMBER:				046910804
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		N-CEN
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-09819
		FILM NUMBER:		22735806

	BUSINESS ADDRESS:	
		STREET 1:		STATE STREET FINANCIAL CENTER
		STREET 2:		ONE LINCOLN STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02111
		BUSINESS PHONE:		6176623239

	MAIL ADDRESS:	
		STREET 1:		ONE LINCOLN STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02111
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<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
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<TYPE>INTERNAL CONTROL RPT
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<FILENAME>NCEN_811-09819_74305202_1221.htm
<TEXT>
Document 2 - file: NCEN_811-09819_74305202_1221.htm

</DOCUMENT>
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