<SEC-DOCUMENT>0001104659-17-057919.txt : 20170919
<SEC-HEADER>0001104659-17-057919.hdr.sgml : 20170919
<ACCEPTANCE-DATETIME>20170919171906
ACCESSION NUMBER:		0001104659-17-057919
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170918
FILED AS OF DATE:		20170919
DATE AS OF CHANGE:		20170919

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RMR Group LLC
		CENTRAL INDEX KEY:			0001613503
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38199
		FILM NUMBER:		171092699

	BUSINESS ADDRESS:	
		STREET 1:		TWO NEWTON PLACE
		STREET 2:		255 WASHINGTON STREET, SUITE 300
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02458
		BUSINESS PHONE:		617-796-8390

	MAIL ADDRESS:	
		STREET 1:		TWO NEWTON PLACE
		STREET 2:		255 WASHINGTON STREET, SUITE 300
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02458

	FORMER NAME:	
		FORMER CONFORMED NAME:	Reit Management & Research LLC
		DATE OF NAME CHANGE:	20140711

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RMR GROUP INC.
		CENTRAL INDEX KEY:			0001644378
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38199
		FILM NUMBER:		171092698

	BUSINESS ADDRESS:	
		STREET 1:		TWO NEWTON PL., 255 WASH. ST., STE. 300
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02458
		BUSINESS PHONE:		(617) 796-8320

	MAIL ADDRESS:	
		STREET 1:		TWO NEWTON PL., 255 WASH. ST., STE. 300
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02458

	FORMER NAME:	
		FORMER CONFORMED NAME:	RMR Group Inc.
		DATE OF NAME CHANGE:	20150910

	FORMER NAME:	
		FORMER CONFORMED NAME:	Reit Management & Research Inc.
		DATE OF NAME CHANGE:	20150608

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Tremont Realty Advisors LLC
		CENTRAL INDEX KEY:			0001716421
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38199
		FILM NUMBER:		171092700

	BUSINESS ADDRESS:	
		STREET 1:		TWO NEWTON PLACE, 255 WASHINGTON STREET
		STREET 2:		SUITE 300
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02458-1634
		BUSINESS PHONE:		617-332-9530

	MAIL ADDRESS:	
		STREET 1:		TWO NEWTON PLACE, 255 WASHINGTON STREET
		STREET 2:		SUITE 300
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02458-1634

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Tremont Mortgage Trust
		CENTRAL INDEX KEY:			0001708405
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				821719041
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		TWO NEWTON PLACE, 255 WASHINGTON STREET
		STREET 2:		SUITE 300
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02458
		BUSINESS PHONE:		(617) 658-0755

	MAIL ADDRESS:	
		STREET 1:		TWO NEWTON PLACE, 255 WASHINGTON STREET
		STREET 2:		SUITE 300
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02458
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-09-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001708405</issuerCik>
        <issuerName>Tremont Mortgage Trust</issuerName>
        <issuerTradingSymbol>TRMT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001716421</rptOwnerCik>
            <rptOwnerName>Tremont Realty Advisors LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TWO NEWTON PLACE</rptOwnerStreet1>
            <rptOwnerStreet2>255 WASHINGTON STREET, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>NEWTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02458</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001613503</rptOwnerCik>
            <rptOwnerName>RMR Group LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TWO NEWTON PLACE</rptOwnerStreet1>
            <rptOwnerStreet2>255 WASHINGTON STREET, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>NEWTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02458</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001644378</rptOwnerCik>
            <rptOwnerName>RMR GROUP INC.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TWO NEWTON PLACE</rptOwnerStreet1>
            <rptOwnerStreet2>255 WASHINGTON STREET, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>NEWTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02458</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares of Beneficial Interest</value>
            </securityTitle>
            <transactionDate>
                <value>2017-09-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>600000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.00</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>600100</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares were acquired directly by Tremont Realty Advisors LLC (&quot;TRA&quot;) in a private placement transaction at $20.00 per share. All shares reported are held directly by TRA.  TRA is a direct wholly owned subsidiary of The RMR Group LLC (&quot;RMR LLC&quot;), which is a direct majority owned operating subsidiary of The RMR Group Inc. (&quot;RMR INC&quot;). RMR INC and RMR LLC may be deemed to beneficially own the shares owned directly by TRA.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ ADAM D. PORTNOY President, on behalf of Tremont Realty Advisors LLC</signatureName>
        <signatureDate>2017-09-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ ADAM D. PORTNOY President, on behalf of The RMR Group LLC</signatureName>
        <signatureDate>2017-09-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ ADAM D. PORTNOY President, on behalf of The RMR Group Inc.</signatureName>
        <signatureDate>2017-09-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
