<SEC-DOCUMENT>0001811513-26-000013.txt : 20260724
<SEC-HEADER>0001811513-26-000013.hdr.sgml : 20260724
<ACCEPTANCE-DATETIME>20260724150049
ACCESSION NUMBER:		0001811513-26-000013
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260715
FILED AS OF DATE:		20260724
DATE AS OF CHANGE:		20260724

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Symetra Investment Management Co
		CENTRAL INDEX KEY:			0001811513
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21462
		FILM NUMBER:		261201183

	BUSINESS ADDRESS:	
		STREET 1:		308 FARMINGTON AVE
		CITY:			FARMINGTON
		STATE:			CT
		ZIP:			06032
		BUSINESS PHONE:		860-370-7011

	MAIL ADDRESS:	
		STREET 1:		308 FARMINGTON AVE
		CITY:			FARMINGTON
		STATE:			CT
		ZIP:			06032

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TORTOISE ENERGY INFRASTRUCTURE CORP
		CENTRAL INDEX KEY:			0001268533
		ORGANIZATION NAME:           	
		EIN:				000000000
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1130

	BUSINESS ADDRESS:	
		STREET 1:		5901 COLLEGE BOULEVARD
		STREET 2:		SUITE 400
		CITY:			OVERLAND PARK
		STATE:			KS
		ZIP:			66211
		BUSINESS PHONE:		913-981-1020

	MAIL ADDRESS:	
		STREET 1:		5901 COLLEGE BOULEVARD
		STREET 2:		SUITE 400
		CITY:			OVERLAND PARK
		STATE:			KS
		ZIP:			66211
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-07-15</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001268533</issuerCik>
        <issuerName>TORTOISE ENERGY INFRASTRUCTURE CORP</issuerName>
        <issuerTradingSymbol>TYG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001811513</rptOwnerCik>
            <rptOwnerName>Symetra Investment Management Co</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>308 FARMINGTON AVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>FARMINGTON</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06032</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Investment Adviser</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Senior Debt Securities</value>
            </securityTitle>
            <postTransactionAmounts>
                <valueOwnedFollowingTransaction>
                    <value>31000000</value>
                </valueOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Symetra Life Insurance Company; Reporting Person serves as investment adviser.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <remarks>The Reporting Person is an investment adviser that exercises investment discretion over securities directly held by Symetra Life Insurance Company. Symetra Life Insurance Company separately filed Form 3. The Reporting Person disclaims beneficial ownership of such securities except to the extent of its pecuniary interest, if any.</remarks>

    <ownerSignature>
        <signatureName>Megan Hatt, Director, Symetra Investment Management Company</signatureName>
        <signatureDate>2026-07-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
