Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 15

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 15
---
    | ​ |  72,092 | ​ | ​ | ​ | ​    | ​ |  68,074 | ​ | ​ |

(1) Solely for the convenience of the reader, we have translated the amounts in this column from Australian dollars into U.S. dollars using the noon buying rate in New York City for cable transfers in Australian dollars as certified for customs purposes by the Federal Reserve Bank of New York as of March 31, 2025

S-4

TABLE OF CONTENTS

of A$1.00 to US$0.6236. These translations should not be considered representations that any such amounts have been, could have been or could be converted into U.S. dollars at that or at any other exchange rate or as of that or any other date.

(2)

Where accounting classifications have changed or where changes in accounting policy are adopted retrospectively, comparatives have been restated and may differ from results previously reported.

(3)

The above income statement extracts for the half-years ended March 31, 2025 and 2024 and balance sheet extracts as of March 31, 2025 and 2024 are derived from the unaudited consolidated financial statements included in the 2025 U.S. Interim Results Announcement. The above income statement extracts for the financial years ended September 30, 2024, 2023 and 2022 and balance sheet extracts as of September 30, 2024 and 2023 are derived from the consolidated financial statements included in the 2024 Form 20-F. The above income statement extracts for the financial years ended September 30, 2021 and 2020 and balance sheet extracts as of September 30, 2022, 2021 and 2020 are derived from the consolidated financial statements previously published.

<div align='center'>S-5</div>

TABLE OF CONTENTS

### RISK FACTORS
Investors should carefully consider the risks described below and in the other information contained or incorporated by reference in this prospectus supplement and the accompanying prospectus, including the risks described in our 2024 Form 20-F and the 2025 U.S. Interim Results Announcement before making an investment decision. The risks and uncertainties described below and in such other information are not the only ones facing us or you, as holders of the notes. Additional risks and uncertainties that we are unaware of, or that we currently deem immaterial, may become important factors that affect us or you, as