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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 HR4C893GWQBLNRPeaiHNQZDtRGHcpxuWf/3HI5c9SKToyZ7bpbr1DJTgFiXOhoRz
 BwntZKaohmxgTbotaRb/cg==

<SEC-DOCUMENT>0001104659-05-005013.txt : 20050209
<SEC-HEADER>0001104659-05-005013.hdr.sgml : 20050209
<ACCEPTANCE-DATETIME>20050209215613
ACCESSION NUMBER:		0001104659-05-005013
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050209
FILED AS OF DATE:		20050209
DATE AS OF CHANGE:		20050209

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MOLSON COORS BREWING CO
		CENTRAL INDEX KEY:			0000024545
		STANDARD INDUSTRIAL CLASSIFICATION:	MALT BEVERAGES [2082]
		IRS NUMBER:				840178360
		STATE OF INCORPORATION:			CO
		FISCAL YEAR END:			1228

	BUSINESS ADDRESS:	
		STREET 1:		P.O. BOX 4030, MAIL #NH375
		CITY:			GOLDEN
		STATE:			CO
		ZIP:			80401
		BUSINESS PHONE:		3032773271

	MAIL ADDRESS:	
		STREET 1:		311 10TH STREET
		CITY:			GOLDEN
		STATE:			CO
		ZIP:			80401

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COORS ADOLPH CO
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ADOLPH COORS JR TRUST
		CENTRAL INDEX KEY:			0001259407

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14829
		FILM NUMBER:		05590508

	MAIL ADDRESS:	
		STREET 1:		PO BOX 4030
		STREET 2:		MALLSTOP VR 900
		CITY:			GOLDEN
		STATE:			CO
		ZIP:			80401
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>a3.xml
<DESCRIPTION>3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-02-09</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000024545</issuerCik>
        <issuerName>MOLSON COORS BREWING CO</issuerName>
        <issuerTradingSymbol>TAP.A</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001259407</rptOwnerCik>
            <rptOwnerName>ADOLPH COORS JR TRUST</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>MAIL STOP VR 900</rptOwnerStreet1>
            <rptOwnerStreet2>PO BOX 4030</rptOwnerStreet2>
            <rptOwnerCity>GOLDEN</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80401</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class B Common Stock, par value $.01 (non-voting)</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1470000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Class A Common Stock, par value $.01 (voting)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-02-09</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class B Common Stock, par value $.01 (non-voting)</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1260126</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held in voting trust</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Class A Exchangeable Shares</value>
                <footnoteId id="F5"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-02-09</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock, par value $.01 (voting)</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1052142</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held in voting trust</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each share of Class A Common Stock is convertible into one share of Class B Common Stock.</footnote>
        <footnote id="F2">In connection with the completion on February 9, 2005 of the transactions contemplated by the Combination Agreement between Adolph Coors Company and Molson Inc., each of the filing person, Pentland Securities (1981), Inc. (&quot;Pentland&quot;), and 4280661 Canada Inc., a subsidiary of Pentland (&quot;Subco&quot;) (filing person, Pentland, and Subco, collectively, the &quot;Stockholders&quot;) entered into various voting trust agreements with substantially identical terms (the &quot;Voting Trust Agreements&quot;) covering all of the Stockholders' shares of Class A Common Stock and Class A Exchangeable Shares (the Class A Common Stock and Class A Exchangeable Shares, collectively, the &quot;Class A Stock&quot;).</footnote>
        <footnote id="F3">Pursuant to the Voting Trust Agreements, each Stockholder transferred such Stockholder's respective Class A Stock to the respective trustee and appointed such trustee to perform each Stockholder's obligations under the respective Voting Trust Agreement, including, but not limited to, each Stockholder's obligations regarding the voting on all proposals presented to the Company's stockholders.  Pursuant to the Voting Trust Agreements, the filing person may be deemed to have beneficial ownership of each of the other Stockholder's Class A Stock.</footnote>
        <footnote id="F4">Held in a voting trust pursuant to the Voting Trusts Agreements.</footnote>
        <footnote id="F5">The Class A Exchangeable Shares are shares of Molson Coors Canadian Inc.  Each share of Class A Exchangeable Shares is convertible into one share of Class A Common Stock.  Thereafter, each share of Class A Common Stock is convertible into one share of Class B Common Stock.</footnote>
        <footnote id="F6">Doesn't expire.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Peter H. Coors, Trustee</signatureName>
        <signatureDate>2005-02-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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