Ownership Submission
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
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
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  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

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.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.