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 OF SECURITIES 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 (Month/Day/Year) 02/25/2005 (Street) GOLDEN, CO 80401-0030 4. If Amendment, Date Original Filed(Month/Day/Year) 03/01/2005 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 Class B Common Stock 02/25/2005   M   17,760 A $ 50.0813 17,760 D   Class B Common Stock 02/25/2005   M   29,999 A $ 27.1107 47,759 D   Class B Common Stock 02/25/2005   S   47,759 D $ 69 0 D

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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

Employee Stock Option (right to buy)

$ 81.89

02/09/2005

03/09/2012

Class B Common Stock

18,000

18,000

D

Employee Stock Option (right to buy)

$ 69.98

02/09/2005

05/12/2014

Class B Common Stock

12,600

12,600

D

Employee Stock Option (right to buy)

$ 71.92

02/09/2005

05/02/2013

Class B Common Stock

17,760

17,760

D

Employee Stock Option (right to buy)

$ 27.1107

02/25/2005

M

29,999

02/09/2005

04/19/2010

Class B Common Stock

29,999

$ 27.1107

0

D

Employee Stock Option (right to buy)

$ 50.0813

02/25/2005

M

17,760

02/09/2005

05/17/2011

Class B Common Stock

17,760

$ 50.0813

0

D

Class B exchange shares of Molson Coors Canada Inc.

(1)

02/09/2005

(2)

Class B Common Stock

1,426 (3)

1,426 (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, CO 80401-0030			Global Chief Bus. Dev. Officer

Signatures

Annita M. Menogan as agent for Robert Coallier		03/08/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(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)	This amendment is being filed to reflect an additional 332 Class B exchangeable shares of Molson Coors Canada Inc. delivered in exchange for shares of Molson Inc. automatically purchased on behalf of the Reporting Person through the Molson Employee Stock Purchase Plan in January 2005.

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