Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 0

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 0
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TABLE OF CONTENTS

Filed Pursuant to Rule 424(b)(5)
Registration Statement No. 333-283007 PROSPECTUS SUPPLEMENT
(TO PROSPECTUS DATED N ovember 5, 2024) US$1,500,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$750,000,000 4.354% Notes due July 1, 2030
US$750,000,000 Floating Rate Notes due July 1, 2030 We are offering US$750,000,000 aggregate principal amount of our 4.354% notes due July 1, 2030, which we refer to as the fixed rate notes, and US$750,000,000 aggregate principal amount of our floating rate notes due July 1, 2030, which we refer to as the floating rate notes, and, together with the fixed rate notes, as the notes. We will pay interest on the fixed rate notes at a rate of 4.354% per year semi-annually in arrears on January 1 and July 1 of each year, subject in each case to the applicable business day convention set forth in this prospectus supplement, beginning on January 1, 2026. We will pay interest on the floating rate notes at a rate equal to Compounded SOFR (as defined herein) plus a margin of 82 basis points quarterly in arrears on January 1, April 1, July 1 and October 1 of each year, subject in each case to the applicable business day convention set forth in this prospectus supplement, beginning on October 1, 2025. The fixed rate notes and the floating rate notes will mature on July 1, 2030. We may redeem all, but not less than all, of the fixed rate notes, and/or the floating rate notes if specified events occur involving Australian taxation, as described under “Description of the Senior Debt Securities—Redemption of Senior Debt Securities—Redemption for Taxation Reasons” in the accompanying prospectus. The notes will be our direct, unconditional and unsecured senior obligations and will rank, except for certain debts required to be preferred by law, equally with all of our other unsecured and unsubordinated obligations from time to time outstanding. For a description of debts preferred by law, see “Description of the Notes—Ranking” in this prospectus supplement. Each of the fixed