Molson Coors Beverage Company$500,000,000 4.900% Senior Notes due 2031$1,000,000,000 5.500% Senior Notes due 2036 Molson Coors Beverage Company is offering $500,000,000 aggregate principal amount of 4.900% Senior Notes due 2031, which we refer toherein as the “2031 notes,” and $1,000,000,000 aggregate principal amount of 5.500% Senior Notes due 2036, which we refer to herein as the“2036 notes,” together with the 2031 notes, the “notes”. Interest on the notes is payable on January8 and July 8 of each year, commencing onJanuary 8, 2027. The 2031 notes will mature on July 8, 2031 and the 2036 notes will mature on July 8, 2036. Unless the context otherwiseindicates, references in this prospectus supplement to “Molson Coors,” “MCBC,” the “Company,” “we,” “us” and “our” are to Molson Coors We may redeem some or all of each series of the notes at the times and at the applicable prices discussed under “Description of the Notes —Optional Redemption.” As described under “Description of the Notes — Repurchase Upon Change of Control Triggering Event,” if a Change ofControl Triggering Event (as defined in “Description of the Notes — Repurchase Upon Change of Control Triggering Event”) occurs with respect toa particular series of notes, we will be required to make an offer to repurchase the notes of such series from holders at a purchase price equal to References in this prospectus supplement to “$,” “dollars” and “U.S. dollars” are to the lawful currency of the United States. References to“€”and “euro” are to the lawful currency of the member states of the European Monetary Union that have adopted the euro as their currency.References to “CAD” are to the lawful currency of Canada. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities orpassed upon the adequacy or accuracy of this prospectus supplement or the accompanying prospectus. Any representation to the contrary is acriminal offense. The notes will be ready for delivery in book-entry form only through the facilities of The Depository Trust Company for the accounts of itsparticipants, including Euroclear Bank S.A./N.V., as operator of the Euroclear System, and Clearstream Banking,société anonyme, on or about May27, 2026. Neither we nor the underwriters have authorized any other person to provide you with informationdifferent from that contained in or incorporated by reference into this prospectus supplement and theaccompanying prospectus or in any free writing prospectus that we may provide to you. We and theunderwriters take no responsibility for, and can provide no assurance as to the reliability of, any otherinformation that others may give. We and the underwriters are offering to sell and are seeking offers to buyour notes only in jurisdictions where offers and sales are permitted. The information contained in or ABOUT THIS PROSPECTUS SUPPLEMENT This document consists of two parts. The first part is this prospectus supplement, which describes thespecific terms of this offering of the notes and also adds to and updates information contained in theaccompanying prospectus, and the documents incorporated by reference in this prospectus supplement andthe accompanying prospectus. The second part is the accompanying prospectus, dated February20, 2024,which is part of our Registration Statement on Form S-3, and which gives more general information, someof which may not apply to this offering of notes. Generally, when we refer to this prospectus, we arereferring to both parts of this document combined. To the extent there is a conflict between the information As permitted by the rules and regulations of the Securities and Exchange Commission (“SEC”), theregistration statement of which the accompanying prospectus forms a part includes additional informationnot contained in the accompanying prospectus. You may read the registration statement and the other reports You should read this prospectus supplement along with the accompanying prospectus and thedocuments incorporated by reference carefully before you decide whether to invest. These documentscontain important information you should consider when making your investment decision. This prospectus We reserve the right to withdraw this offering of the notes at any time, and we and the underwritersreserve the right to reject any commitment to subscribe for the notes, in whole or in part, and to allot to you This prospectus supplement, the accompanying prospectus or the documents incorporated by referenceinto this prospectus supplement or the accompanying prospectus may include trademarks, service marks andtrade names owned by us or other companies. All trademarks, service marks and trade names included orincorporated by reference in this prospectus supplement, the accompanying prospectus or the documentsincorporated by reference into this prospectus supplement or the accompanying prospectus are the property of their respective owners.