<SEC-DOCUMENT>0001104659-21-140757.txt : 20211117
<SEC-HEADER>0001104659-21-140757.hdr.sgml : 20211117
<ACCEPTANCE-DATETIME>20211117211149
ACCESSION NUMBER:		0001104659-21-140757
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20211115
FILED AS OF DATE:		20211117
DATE AS OF CHANGE:		20211117

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Landriau Gary E
		CENTRAL INDEX KEY:			0001892777

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40873
		FILM NUMBER:		211422399

	MAIL ADDRESS:	
		STREET 1:		C/O REALTY INCOME CORPORATION
		STREET 2:		11995 EL CAMINO REAL
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92130

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Orion Office REIT Inc.
		CENTRAL INDEX KEY:			0001873923
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2325 CAMELBACK ROAD, SUITE 850
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85016
		BUSINESS PHONE:		(602) 698-1002

	MAIL ADDRESS:	
		STREET 1:		2325 CAMELBACK ROAD, SUITE 850
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85016
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>tm2133165-2_4seq1.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-11-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001873923</issuerCik>
        <issuerName>Orion Office REIT Inc.</issuerName>
        <issuerTradingSymbol>ONL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001892777</rptOwnerCik>
            <rptOwnerName>Landriau Gary E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ORION OFFICE REIT INC.</rptOwnerStreet1>
            <rptOwnerStreet2>2325 E. CAMELBACK ROAD, SUITE 850</rptOwnerStreet2>
            <rptOwnerCity>PHOENIX</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85016</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SEE REMARKS</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-11-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2160</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2514</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents restricted stock units (&quot;RSUs&quot;) awarded to the Reporting Person pursuant to the Issuer's equity plan. The RSUs vest ratably on each of the first, second and third anniversaries of the the date upon which the RSUs were granted, subject to the Reporting Person's continued service with the Issuer through such applicable vesting date.</footnote>
    </footnotes>

    <remarks>The Reporting Person serves as the Chief Investment Officer and Executive Vice President of the Issuer</remarks>

    <ownerSignature>
        <signatureName>/s/ Gary E. Landriau</signatureName>
        <signatureDate>2021-11-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
