Sec Form 4 Filing - Coallier Robert @ MOLSON COORS BREWING CO - 2005-03-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Coallier Robert 2. Issuer Name and Ticker or Trading Symbol MOLSON COORS BREWING CO [ TAP.A; TAP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Global Chief Bus. Dev. Officer (Last) (First) (Middle) C/O MOLSON COORS BREWING COMPANY, 311 10TH STREET, NH311 3. Date of Earliest Transaction (MM/DD/YY) 03/15/2005 (Street) GOLDEN, CO80401-0030 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class B exchange shares of Molson Coors Canada Inc. ( 1 ) 02/09/2005 ( 2 ) Class B Common Stock 1,426 1,426 D Employee Stock Option (right to buy) $ 74.355 03/15/2005 A 14,000 03/15/2006 03/15/2015 Class B Common Stock 14,000 $ 74.355 62,360 ( 3 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Coallier Robert C/O MOLSON COORS BREWING COMPANY 311 10TH STREET, NH311 GOLDEN, CO80401-0030 Global Chief Bus. Dev. Officer Signatures Annita M. Menogan as agent for Robert Coallier 03/17/2005 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The shares are convertible on a 1-for-1 basis. ( 2 )The Class B exchangeable shares are redeemable by a subsidiary of Molson Coors Brewing Company at any time after February 9, 2045, for Molson Coors Brewing Company Class B Common Stock or, for non-affiliates only, the equivalent value in cash. ( 3 )Reporting person holds an aggregate of 62,360 options with various exercise dates and various expiration dates.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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