Google-C US Stock Prospectus (April 28, 2025 Edition)

Alphabet Inc. $% Notes due 20$% Notes due 20$% Notes due 20$% Notes due 20 We are offering $aggregate principal amount of our% notes due 20(the “20Notes”), $aggregate principal amount ofour% notes due 20(the “20Notes”), $aggregate principal amount of our% notes due 20(the “20Notes”) and$aggregate principal amount of our% notes due 20(the “20Notes” and, together with the20 Notes, the20Notes and the20Notes, the “notes”). The 20 Notes will mature on, 20, the 20Notes will mature on, 20, the 20Notes willmature on, 20and the 20 Notes will mature on, 20. Interest on the notes will accrue from May, 2025 and The notes will be our senior unsecured obligations and will rank equally with our other unsecured and unsubordinated indebtedness from timeto time outstanding. The notes will be structurally subordinated to all existing and future indebtedness and other obligations of our See “Risk Factors” beginning on page S-7 for a discussion of certain risks that should be considered inconnection with an investment in the notes. Neither the Securities and Exchange Commission (the “SEC”) nor any state securities commission has approved or disapproved of thenotes or determined that this prospectus supplement or the accompanying prospectus is accurate or complete. Any representation to Table of Contents We are responsible for the information contained and incorporated by reference in this prospectus supplement, the accompanying prospectusand in any related free writing prospectus we prepare or authorize. No person is authorized to give any information or to make anyrepresentation that is different from, or in addition to, those contained or incorporated by reference into this prospectus supplement, theaccompanying prospectus or any related free writing prospectus that we prepare or authorize. If given or made, such information orrepresentations must not be relied upon as having been authorized by us, and we take no responsibility for any information that others maygive you. If you are in a jurisdiction where offers to sell, or solicitations of offers to purchase, the notes offered by this document are unlawful,or if you are a person to whom it is unlawful to direct these types of activities, then the offer presented in this document does not extend to you.The information contained in this document speaks only as of the date of this document, unless the information specifically indicates that TABLE OF CONTENTS Prospectus Supplement PageS-iiS-iiS-iiiS-1S-3S-4 ABOUT THIS PROSPECTUS SUPPLEMENTWHERE YOU CAN FIND MORE INFORMATIONINFORMATION INCORPORATED BY REFERENCEFORWARD-LOOKING STATEMENTSSUMMARYTHE OFFERINGRISK FACTORSUSE OF PROCEEDSDESCRIPTION OF THE NOTESMATERIAL UNITED STATES FEDERAL INCOME TAX CONSIDERATIONSUNDERWRITINGLEGAL MATTERSEXPERTS Prospectus ABOUT THIS PROSPECTUSFORWARD-LOOKING STATEMENTSALPHABET INCRISK FACTORSUSE OF PROCEEDSDESCRIPTION OF DEBT SECURITIES Table of Contents ABOUT THIS PROSPECTUS SUPPLEMENT This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of this offering of the notes and also addsto and updates information contained in the accompanying prospectus and the documents incorporated by reference into the accompanying prospectus.The second part, the accompanying prospectus dated April25, 2025, which is part of our Registration Statement on FormS-3(SEC RegistrationNo.333-286752),gives more general information about us and the securities we may offer from time to time under our shelf registration statement,some of which may not apply to this offering of the notes. This prospectus supplement may add to, update or change the information in the You should read this prospectus supplement, the accompanying prospectus, the documents incorporated by reference into this prospectus supplementand the accompanying prospectus, and the additional information described under “Where You Can Find More Information” and “Information You should not consider any information in this prospectus supplement or the accompanying prospectus to be investment, legal or tax advice. Youshould consult your own counsel, accountants and other advisers for legal, tax, business, financial and related advice regarding the purchase of any ofthe notes offered by this prospectus supplement. The information contained in this document speaks only as of the date of this document, unless theinformation specifically indicates that another date applies. You should not assume that the information contained in this prospectus supplement, orcontained or incorporated by reference in the accompanying prospectus, or in any related free writing prospectus is accurate as of any date other thantheir respective dates. The information contained in this prospectus supplement is accurate only as of the date of this prospectus supplement, regardlessof the time of delivery of this prospectus supplement or any sale of the securities offered hereby. Neither the delivery of this prospectus sup