Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 61

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 61
---
 dated June 10, 2025.

We also incorporate by reference each of the following documents that we will file with the SEC after the date of this prospectus supplement until this offering is completed:

•

reports filed under Sections 13(a) and (c) of the Exchange Act, including reports on Form 6-K if and to the extent specified in such report as being incorporated by reference in the accompanying prospectus; and

•

any reports filed under Section 15(d) of the Exchange Act.

You should assume that the information appearing in this prospectus supplement is accurate only as of the date of this prospectus supplement and that information appearing in documents incorporated by reference herein is accurate only as of the respective dates of those documents. Our business, financial condition and results of operations may have changed since that date.

<div align='center'>S-35</div>

TABLE OF CONTENTS

CURRENCY OF PRESENTATION AND EXCHANGE RATES We publish our consolidated financial statements in Australian dollars. The following table sets forth, for Westpac’s financial years indicated, the high, low, average and period-end noon buying rates in New York City for cable transfers of Australian dollars as certified for customs purposes by the Federal Reserve Bank of New York, expressed in U.S. dollars per A$1.00. Westpac’s financial year ends on September 30 of each year.

| Financial Year | ​ | ​ | At Period End |   |        |   | ​ | ​ | Average Rate(1) |   |        |   | ​ | ​ | High |   |        |   | ​ | ​ | Low |   |        |   | ​ |
| 2020           | ​ | ​ | ​             | ​ | 0.7160 | ​ | ​ | ​ | ​               | ​ | 0.6815 | ​ | ​ | ​ | ​    | ​ | 0.7388 | ​ | ​ | ​ | ​   | ​ | 0.5755 | ​ | ​ |
| 2021           | ​ | ​ | ​             | ​ | 0.7228 | ​ | ​ | ​ | ​               | ​ | 0.7490 | ​ | ​ | ​ | ​    | ​ | 0.7953 | ​ | ​ | ​ | ​   | ​ | 0.7006 | ​ | ​ |
| 2022           | ​ | ​ | ​             | ​ | 0.6437 | ​