Company: WEBNF
Filing Date: 2025-08-12
Form Type: 6-K
Source: 0001104659-25-076338
Chunk: 0

Company: WESTPAC BANKING CORP
Filing Date: 2025-08-12
Form: 6-K
Chunk 0
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<div align='center'>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

August 12, 2025

Commission File Number 1-10167

WESTPAC BANKING CORPORATION

(Translation of registrant’s name into English)

(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 ¨</div>

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): ¨

Incorporation by Reference

The information contained in this Report on Form 6-K, excluding
the information set forth in Exhibit 1, shall be incorporated by reference in the prospectuses relating to the Registrant’s
securities contained in the Registrant’s Registration Statements on Form F-3 (File Nos. 333-283007 and 333-283008), as such
prospectuses may be amended or supplemented from time to time.

Appointment of Chief Executive, Consumer

Westpac today announced the
appointment of Carolyn McCann to the position of Chief Executive, Consumer, effective immediately.

Ms McCann brings almost thirty years of corporate experience, including
two decades in the banking and insurance industries and more than a decade at Westpac. She has been Acting Chief Executive, Consumer since
May 12, 2025. Previously, she was Group Executive, Customer and Corporate Services, responsible for Westpac’s operations, scams
and fraud prevention, customer collections and hardship, property resilience, corporate affairs and marketing.

Index to Exhibits

| Exhibit 
 No.     |     | Description                              |
| 1       |     | Appointment of Chief Executive, Consumer |

Disclosure regarding forward-looking statements

The information contained in this Report on Form 6-K
contains statements that constitute “forward-looking statements” within the meaning of section 21E of the U.S. Securities
Exchange Act of 1934.

Forward-looking statements are