6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

November 8, 2023

Commission FileNumber 1-10167

WESTPAC BANKING CORPORATION

(Translation of registrant’s name into English)

275 KENT STREET, SYDNEY, NEW SOUTH WALES 2000, AUSTRALIA

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports

under cover of Form 20-F or Form 40-F.

Form 20-F x Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

Index to Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 1

8 November 2023

Westpac tenders external audit services

Westpac announced today that it has commenced a tender for its external audit services. The decision to tender the audit reflects best practice for audit firm rotation.

Westpac’s external auditor, PricewaterhouseCoopers (PwC) was appointed by shareholders in 2002. Individuals who were partners of PwC or its antecedent firms have been the external auditors since 1968. Due to their tenure as the Group’s external auditor, PwC has not been invited to participate in the tender.

For further information:

This document has been authorised for release by Tim Hartin, Company Secretary.