Company: WEBNF
Filing Date: 2025-11-03
Form Type: 6-K
Source: 0001104659-25-105152
Chunk: 0

Company: WESTPAC BANKING CORP
Filing Date: 2025-11-03
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

November 3, 2025

Commission File Number 1-10167

(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 xForm 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 No. 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.

Westpac sells RAMS mortgage portfolio

Westpac today announced it
has entered into an agreement to sell its $21.4bn RAMS mortgage portfolio to a consortium which includes Pepper Money Limited, KKR and
PIMCO. The sale represents the whole of the RAMS branded mortgage portfolio.

The sale is at a slight premium
to the gross loan value of the portfolio to be transferred at completion. After transaction costs and other adjustments, a loss on sale
is expected.

Following completion, Westpac’s
common equity Tier 1 capital ratio is estimated to increase by c.20 bps.

Completion of the transaction
is subject to various conditions and regulatory approvals and is expected to occur in 2H26.

Index to Exhibits

| Exhibit 
 No.     |     | Description                           |
| 1       |     | Westpac sells RAMS mortgage portfolio |

Disclosure regarding forward-looking statements

The information contained in this Report on Form 6-K
contains statements that constitute “forward-looking