UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

(Amendment No. 1)

(Mark One)

For the transition period from              to              .

Commission File Number: 1-14829

Molson Coors Brewing Company

(Exact name of registrant as specified in its charter)

303-927-2337 (Colorado)

514-521-1786 (Québec)

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES x  NO o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. YES o  NO x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES x  NO o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). YES x  NO o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). YES o  NO x

The aggregate market value of the registrant’s voting and non-voting common stock held by non-affiliates of the registrant at the close of business on June 29, 2012, was $6,037,690,186 based upon the last sales price reported for such date on the New York Stock Exchange and the Toronto Stock Exchange. For purposes of this disclosure, shares of common and exchangeable stock held by persons holding more than 10% of the outstanding shares of stock and shares owned by officers and directors of the registrant as of June 29, 2012, are excluded in that such persons may be deemed to be affiliates. This determination is not necessarily conclusive of affiliate status for other purposes.

The number of shares outstanding of each of the registrant’s classes of common stock, as of February 15, 2013:

Exchangeable shares:

As of February 15, 2013, the following number of exchangeable shares was outstanding for Molson Coors Canada, Inc.:

These Class A and Class B exchangeable shares offer substantially the same economic and voting rights as the respective classes of common shares of the registrant. This is achieved via the following structure: The registrant has outstanding one share each of special Class A and Class B voting stock, through which the holders of Class A exchangeable shares and Class B exchangeable shares of Molson Coors Canada Inc. (a subsidiary of the registrant), respectively, may exercise their voting rights with respect to the registrant. The special Class A and Class B voting stock are entitled to one vote for each of the exchangeable shares, respectively, excluding shares held by the registrant or its subsidiaries, and generally vote together with the Class A common stock and Class B common stock, respectively, on all matters on which the Class A common stock and Class B common stock are entitled to vote. The trustee holder of the special Class A voting stock and the special Class B voting stock has the right to cast a number of votes equal to the number of then outstanding Class A exchangeable shares and Class B exchangeable shares, respectively.

Documents Incorporated by Reference: Portions of the registrant’s definitive proxy statement for the registrant’s 2013 annual meeting of stockholders, which will be filed no later than 120 days after the close of the registrant’s fiscal year ended December 29, 2012, are incorporated by reference under Part III of this Annual Report on Form 10-K.

EXPLANATORY NOTE

The sole purpose of this Amendment No. 1 on Form 10-K/A (the “Amendment”) to the Annual Report on Form 10-K of Molson Coors Brewing Company that was filed with the Securities and Exchange Commission on February 22, 2013 (the “Form 10-K”) is to correct a typographical error in the Independent Registered Public Accounting Firm’s consent filed as Exhibit 23.2 to the Form 10-K.  The consent incorrectly notes that it relates to the report on the consolidated financial statements of MillerCoors LLC dated February 22, 2013, rather than February 15, 2013, which is the correct date of such report.  Except as described above, no other amendments are being made to the Form 10-K. This Amendment does not modify or update in any way the disclosures contained in the Form 10-K.

PART IV

ITEM 15.  Exhibits and Financial Statement Schedules

(3)                                 Exhibit list

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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