Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 12

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 12
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 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.

#### Interest Payment Dates
Interest on the fixed rate notes will be payable 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 below, beginning on January 1, 2026. Interest on the floating rate notes will be payable 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. Any payment of principal or interest with respect to the fixed rate notes required to be made on an interest payment date that is not a business day in New York, London and Sydney will be made on the next succeeding business day, and no interest will accrue on that payment for the period from and after the interest payment date to the date of payment on the next succeeding business day. If any floating rate interest payment date (as defined herein) would fall on a day that is not a business day in New York, London and Sydney, other than the floating rate interest payment date that is also the date of maturity for the floating rate notes, that floating rate interest payment date will be postponed to the following day that is a business day, except if such next business day is in a different month, in which case such floating rate interest payment date will be the immediately preceding day that is a business day. If the date of maturity of the floating rate notes is not a business day, payment of principal and interest on the floating rate notes will be made on the following day that is a business day and no interest will accrue for the period from and after such date of maturity of the floating rate notes.

#### Ranking
The notes will be our direct, unconditional, unsubordinated 
 and unsecured 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. The notes will rank senior to our subordinated obligations.

#### Redemption for TaxationReasons
Subject to certain limitations, the senior indenture (as defined 
 herein) provides that we will have the right to redeem