TWELFTH SUPPLEMENTAL INDENTURE DATED AS OF JUNE 15, 2012 to INDENTURE dated as of September 22, 2005 among MOLSON COORS CAPITAL FINANCE ULC, as Issuer, THE GUARANTORS NAMED THEREIN, as Guarantors, and COMPUTERSHARE TRUST COMPANY OF CANADA as Canadian Trustee

THIS TWELFTH SUPPLEMENTAL INDENTURE, dated as of June 15, 2012 (this “Supplemental Indenture”), to the Indenture dated as of September 22, 2005, as supplemented by the First Supplemental Indenture and Second Supplemental Indenture thereto, each dated as of September 22, 2005, the Third Supplemental Indenture thereto dated as of April 10, 2007, the Fourth Supplemental Indenture thereto dated as of February 1, 2008, the Fifth Supplemental Indenture thereto dated as of May 23, 2008, the Sixth Supplemental Indenture thereto dated as of June 27, 2008, the Seventh Supplemental Indenture thereto dated as of June 30, 2008, the Eighth Supplemental Indenture thereto dated as of December 25, 2010, the Ninth Supplemental Indenture thereto dated as of March 8, 2011, the Tenth Supplemental Indenture thereto dated November 11, 2011 and the Eleventh Supplemental Indenture thereto dated May 3, 2012 (collectively, the “Original Indenture” and, together with this Supplemental Indenture (the “Indenture”), among Molson Coors Capital Finance ULC, a Nova Scotia unlimited liability company (the “Company”), Molson Coors Brewing Company, a Delaware corporation (the “Parent”), Coors Brewing Company, a Colorado corporation, Molson Coors International LP, a Delaware limited partnership, CBC Holdco LLC, a Colorado limited liability company, MCBC International Holdco, Inc., a Colorado corporation, Molson Coors International General, ULC, a Nova Scotia unlimited liability company, Coors International Holdco, ULC, a Nova Scotia unlimited liability company, Molson

Coors Callco ULC, a Nova Scotia unlimited liability company, Molson Canada 2005, a Canadian partnership, MC Holding Company LLC, a Colorado limited liability company, CBC Holdco 2 LLC, a Colorado limited liability company, Newco3, Inc., a Colorado corporation, Molson Coors Brewing Company (UK) Limited, an English private limited company, Molson Coors Holdings Limited, an English private limited company, Golden Acquisition, an English private unlimited company and Molson Coors Holdco, Inc., a Delaware corporation (collectively, the “Guarantors”), and Computershare Trust Company of Canada, a trust company duly incorporated and existing under the laws of Canada, as successor to The Canada Trust Company, as Canadian Trustee (the “Canadian Trustee”).

WHEREAS, the Company, the Guarantors and the Canadian Trustee are authorized to enter into this Supplemental Indenture pursuant to Section 9.01 of the Original Indenture.

NOW, THEREFORE, THIS SUPPLEMENTAL INDENTURE WITNESSETH:

That the parties hereto hereby agree as follows:

IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture to be duly executed by their respective officers thereunto duly authorized as of the date first above written.