WBK / Westpac Banking Corp - ADR - SEC-arkiveringar, Årsredovisning, Fullmaktsutlåtande

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15F CERTIFICATION OF A FOREIGN PRIVATE ISSUER’S TERMINATION OF REGISTRATION OF A CLASS OF SECURITIES UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ITS TERMIN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15F CERTIFICATION OF A FOREIGN PRIVATE ISSUER’S TERMINATION OF REGISTRATION OF A CLASS OF SECURITIES UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ITS TERMINATION OF THE DUTY TO FILE REPORTS UNDER SECTION 13(a) OR SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 1-10167 Westpac B

Westpac to change the format of its long-term USD funding

Exhibit 99.1 5 March 2026 Westpac to change the format of its long-term USD funding Westpac Banking Corporation (“Westpac”) today announced its intention to voluntarily deregister from the United States Securities and Exchange Commission (the “SEC”) by filing a Form 15F with the SEC as early as May 2026. Upon filing the Form 15F, Westpac’s reporting obligations under Section 15(d) of the United St

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 April 14, 2026 Commission File Number 1-10167 WESTPAC BANKING

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 April 14, 2026 Commission File Number 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.

For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relations +61 402 393 619 +61 422 800 321 This document has been authorised for release by Tim Hartin, Company Secretary. Appendix 1 - Rest

Exhibit 1 Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 ASX RELEASE 14 April 2026 ITEMS IMPACTING HALF YEAR 2026 RESULTS Westpac is well positioned to support customers amid ongoing geopolitical uncertainty.

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 March 26, 2026 Commission File Number 1- 10167 WESTPAC BANKING

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 March 26, 2026 Commission File Number 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.

Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 ASX RELEASE 26 March 2026 UNITE Update Westpac Banking Corporation (“Westpac”) today provides the attached update. For further information: Hayden Cooper Justin McCarthy Group He

Exhibit 1 Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 ASX RELEASE 26 March 2026 UNITE Update Westpac Banking Corporation (“Westpac”) today provides the attached update.

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 March 5, 2026 Commission File Number 1- 10167 WESTPAC BANKING

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 March 5, 2026 Commission File Number 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.

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 February 13, 2026 Commission File Number 1-10167 WESTPAC BANKI

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 February 13, 2026 Commission File Number 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.

ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 13 February 2026 Pillar 3 Report as at 31 December 2025 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (December 2025). For furth

Exhibit 1 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 13 February 2026 Pillar 3 Report as at 31 December 2025 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (December 2025).

Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 ASX RELEASE 13 February 2026 Westpac First Quarter 2026 Investor Discussion Pack Westpac Banking Corporation (“Westpac”) today provides the attached First Quarter 2026 Investor D

Exhibit 2 Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 ASX RELEASE 13 February 2026 Westpac First Quarter 2026 Investor Discussion Pack Westpac Banking Corporation (“Westpac”) today provides the attached First Quarter 2026 Investor Discussion Pack.

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 February 13, 2026 Commission File Number 1-10167 WESTPAC BANKI

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 February 13, 2026 Commission File Number 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.

ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 13 February 2026 Westpac First Quarter 2026 Update Westpac Banking Corporation (“Westpac”) today provides the attached First Quarter 2026 Update. For further informat

Exhibit 1 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 13 February 2026 Westpac First Quarter 2026 Update Westpac Banking Corporation (“Westpac”) today provides the attached First Quarter 2026 Update.

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 February 10, 2026 Commission File Number 1-10167 WESTPAC BANKI

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 February 10, 2026 Commission File Number 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.

Retirement of Chief Information Officer

Exhibit 1 Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 10 February 2026 Retirement of Chief Information Officer Westpac today announced Chief Information Officer Scott Collary will retire from the bank later this year after a distinguished career in financial services and six years with Westpac.

ASXRELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 11 December 2025 Results of the 2025 Annual General Meeting In accordance with ASX Listing Rule 3.13.2 and section 251AA of the Corporations Act 2001 (Cth), the result

Exhibit 1 ASXRELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 11 December 2025 Results of the 2025 Annual General Meeting In accordance with ASX Listing Rule 3.

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 December 11, 2025 Commission File Number 1-10167 WESTPAC BANKI

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 December 11, 2025 Commission File Number 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.

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 December 2, 2025 Commission File Number 1-10167 WESTPAC BANKIN

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 December 2, 2025 Commission File Number 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.

ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 2 December 2025 WESTPAC SUSTAINABILITY UPDATE Following is Westpac’s Sustainability Update. For further information: Hayden Cooper Justin McCarthy Group Head of Media

Exhibit 1 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 2 December 2025 WESTPAC SUSTAINABILITY UPDATE Following is Westpac’s Sustainability Update.

SECTION 906 CERTIFICATIONS

Exhibit 13 144 WESTPAC GROUP 2025 ANNUAL REPORT EXHIBIT 13 SECTION 906 CERTIFICATIONS Pursuant to 18 U.

Cybersecurity management and governance

EXHIBIT 15.4 1 EXHIBIT 15.4 Cybersecurity management and governance The Group Chief Information Security Officer (CISO) reports to the Chief Information Officer, a member of the Executive Team. The CISO is a member of key cybersecurity governance forums and is responsible for leading and managing the cybersecurity function, setting the cybersecurity strategy and direction, and overseeing the imple

Consent of Independent Registered Public Accounting Firm

Exhibit 15.2 146 WESTPAC GROUP 2025 ANNUAL REPORT EXHIBIT 15.2 Consent of Independent Registered Public Accounting Firm We hereby consent to the incorporation by reference in the Registration Statements on Form F-3 (Nos. 333-283007 and 333-283008) of Westpac Banking Corporation of our report dated 3 November 2024 relating to the financial statements, which appears in this Form 20-F. /s/ Pricewater

Consent of Independent Registered Public Accounting Firm

Exhibit 15.1 FINANCIAL REPORT EXHIBITS INDEX STRATEGIC REVIEW PERFORMANCE REVIEW EXHIBIT 15.4 ADDITIONAL INFORMATION 145 EXHIBIT 15.1 Consent of Independent Registered Public Accounting Firm We consent to the incorporation by reference in the registration statements (Nos. 333-283007 and 333-283008) on Form F-3 of our report dated 2 November 2025, with respect to the consolidated financial statemen

144 WESTPAC GROUP 2025 ANNUAL REPORT ABOUT WESTPAC As Australia's first bank, we've been taking action to support people, businesses and communities for more than 200 years. Established in New South Wales in 1817, Westpac has grown to be one of Austr

Exhibit 15.3 FINANCIAL REPORT EXHIBITS INDEX STRATEGIC REVIEW PERFORMANCE REVIEW EXHIBIT 15.4 ADDITIONAL INFORMATION 143 EXHIBIT 15.3 Exhibit 15.3 Westpac Group 2025 Annual Report on Form 20-F Section 1 144 Strategic review 144 Corporate governance 188 Directors’ report 208 Remuneration report 222 Risk factors 254 Information on Westpac 268 Section 2 Financial statements 287 Section 3 289 Reading

SECTION 302 CERTIFICATION

Exhibit 12 142 WESTPAC GROUP 2025 ANNUAL REPORT EXHIBIT 12 SECTION 302 CERTIFICATION I, Anthony James Miller, certify that: 1.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 Or ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30, 2025 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT

3 November 2025

Exhibit 1 Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 Westpac sells RAMS mortgage portfolio Westpac today announced it has entered into an agreement to sell its $21.

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 WESTPAC BANKIN

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 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.

2025 SUSTAINABILITY REPORT WESTPAC BANKING CORPORATION ABN 33 007 457 141 THIS REPORT INCLUDES CLIMATE-RELATED DISCLOSURES FOCUSED ON ALIGNING WITH AUSTRALIAN AND NEW ZEALAND STANDARDS. WESTPAC INTRODUCTION GOVERNANCE STRATEGY RISK MANAGEMENT METRICS

Exhibit 1 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 Westpac 2025 Sustainability Report Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2025 Sustainability Report.

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 WESTPAC BANKIN

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 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.

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 WESTPAC BANKIN

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 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.

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 WESTPAC BANKIN

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 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.

PILLAR 3 REPORT WESTPAC SEPTEMBER 2025 INCORPORATING THE REQUIREMENTS OF APS 330 WESTPAC BANKING CORPORATION ABN 33 007 457 141 Acknowledgement of Indigenous Peoples Westpac acknowledges the First Peoples of Australia. We recognise their ongoing role

Exhibit 1 ASXRELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 Pillar 3 Report as at 30 September 2025 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (September 2025).

PRESENTATION ANDINVESTOR DISCUSSIONPACK WESTPAC 2025 FULL YEAR FINANCIAL RESULTS FOR THE 12 MONTHS ENDED 30 SEPTEMBER 2025 1 2 Westpac Group 2025 Full Year Results Presentation & Investor Discussion Pack WESTPAC 2025 FULL YEAR RESULTS INDEX 2025 Full

Exhibit 1 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 Westpac 2025 Presentation and Investor Discussion Pack Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2025 Presentation and Investor Discussion Pack.

ASXRELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 Westpac 2025 Full Year Financial Results Announcement Westpac Banking Corporation (Westpac”) today provides the attached Westpac 2025 Full Year Financi

Exhibit 1 ASXRELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 Westpac 2025 Full Year Financial Results Announcement Westpac Banking Corporation (Westpac”) today provides the attached Westpac 2025 Full Year Financial Results Announcement.

RISK FACTORS WESTPAC BANKING CORPORATION ABN 33 007 457 141 NOVEMBER 2025 WESTPAC 2 WESTPAC GROUP 2025 RISK FACTORS DISCLAIMER Disclaimer The material contained in this document is intended to provide further information on the current and future ris

Exhibit 1 ASXRELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 2025 Risk Factors Westpac Banking Corporation (“Westpac”) today provides the attached 2025 Risk Factors.

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 WESTPAC BANKIN

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 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.

i ASX APPENDIX 4E ASX Appendix 4E Results for announcement to the market1 Report for the full year ended 30 September 20252 Revenue from ordinary activitiesa,b ($m) up 4% to 22,384 Profit from ordinary activities after tax attributable to equity hold

Exhibit 1 ASXRELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 Westpac 2025 Group Annual Report and Appendix 4E Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2025 Group Annual Report and Appendix 4E.

Rules 4.7.3 and 4.10.3 ASX Listing Rules Appendix 4G (current at 17/7/2020) Page 1 Appendix 4G Key to Disclosures Corporate Governance Council Principles and Recommendations Name of entity WESTPAC BANKING CORPORATION ABN/ARBN Financial year ended: 33

Exhibit 1 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 3 November 2025 Appendix 4G and 2025 Corporate Governance Statement Westpac Banking Corporation (“Westpac”) today provides the attached Appendix 4G and the Westpac Group 2025 Corporate Governance Statement.

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 WESTPAC BANKIN

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 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.

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 WESTPAC BANKIN

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 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.

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 WESTPAC BANKIN

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 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.

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 October 16, 2025 Commission File Number 1-10167 WESTPAC BANKIN

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 October 16, 2025 Commission File Number 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.

16 October 2025

Exhibit 1 Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 16 October 2025 ITEMS IMPACTING WESTPAC’S FULL YEAR 2025 (FY25) RESULTS Items included within Operating Expenses in Second Half 2025 (2H25) The Group has recognised a restructuring charge of $273 million (pre-tax) as part of the targeted productivity initiatives through our Fit for Growth Program.

Westpac Banking Corporation

Exhibit 1 Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 ASX RELEASE 15 October 2025 Removal of operational risk capital overlay Westpac acknowledges the decision by the Australian Prudential Regulation Authority (APRA) to lift its enforceable undertaking and confirm Westpac’s improvement in risk management.

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 October 15, 2025 Commission File Number 1-10167 WESTPAC BANKIN

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 October 15, 2025 Commission File Number 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.

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 September 2, 2025 Commission File Number 1-10167 WESTPAC BANKI

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 September 2, 2025 Commission File Number 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.

ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 2 September 2025 WESTPAC BUSINESS & WEALTH UPDATE Following is Westpac’s Business & Wealth Update. For further information: Hayden Cooper Justin McCarthy Group Head o

Exhibit 1 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 2 September 2025 WESTPAC BUSINESS & WEALTH UPDATE Following is Westpac’s Business & Wealth Update.

ASX ANNOUNCEMENT I WESTPAC 3Q25 UPDATE ASX ANNOUNCEMENT 3Q25 UPDATE 14 AUGUST 2025 HIGHLIGHTS $1.9bn Unaudited statutory net profit up 14% on 1H25 average $1.9bn Unaudited net profit ex Notable Items up 8% on 1H25 average 12.3% CET1 capital ratio abo

Exhibit 2 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 14 August 2025 WESTPAC 3Q25 UPDATE Following is Westpac’s 3Q25 update for the three months ended 30 June 2025.

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 14, 2025 Commission File Number 1-10167 WESTPAC BANKING

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 14, 2025 Commission File Number 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.

EXHIBIT 1

Exhibit 1

© Westpac Banking Corporation ABN 33 007 457 141 3Q25 INVESTOR DISCUSSION PACK FOR THE 3 MONTHS ENDED 30 JUNE 2025 This document should be read in conjunction with Westpac’s June 2025 Pillar 3 Report. All amounts are in Australian dollars. 3Q25 SUMMA

Exhibit 3 ASX RELEASE Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 14 August 2025 WESTPAC 3Q25 INVESTOR DISCUSSION PACK Following are Westpac’s 3Q25 slides covering financial performance, capital, credit quality and funding for the three months ended 30 June 2025.

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

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) 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.

12 August 2025

Exhibit 1 Westpac Banking Corporation Level 18, 275 Kent Street Sydney, NSW, 2000 12 August 2025 Appointment of Chief Executive, Consumer Westpac today announced the appointment of Carolyn McCann to the position of Chief Executive, Consumer, effective immediately.

United States Securities and Exchange Commission Washington, D.C. 20549 Form F-N APPOINTMENT OF AGENT FOR SERVICE OF PROCESS BY FOREIGN BANKS AND FOREIGN INSURANCE COMPANIES AND CERTAIN OF THEIR HOLDING COMPANIES AND FINANCE SUBSIDIARIES MAKING PUBLI

United States Securities and Exchange Commission Washington, D.C. 20549 Form F-N APPOINTMENT OF AGENT FOR SERVICE OF PROCESS BY FOREIGN BANKS AND FOREIGN INSURANCE COMPANIES AND CERTAIN OF THEIR HOLDING COMPANIES AND FINANCE SUBSIDIARIES MAKING PUBLIC OFFERINGS OF SECURITIES IN THE UNITED STATES A. Name of issuer or person filing (“Filer”): Westpac Banking Corporation B. This is (select one): ¨ an

United States Securities and Exchange Commission Washington, D.C. 20549 Form F-N APPOINTMENT OF AGENT FOR SERVICE OF PROCESS BY FOREIGN BANKS AND FOREIGN INSURANCE COMPANIES AND CERTAIN OF THEIR HOLDING COMPANIES AND FINANCE SUBSIDIARIES MAKING PUBLI

United States Securities and Exchange Commission Washington, D.C. 20549 Form F-N APPOINTMENT OF AGENT FOR SERVICE OF PROCESS BY FOREIGN BANKS AND FOREIGN INSURANCE COMPANIES AND CERTAIN OF THEIR HOLDING COMPANIES AND FINANCE SUBSIDIARIES MAKING PUBLIC OFFERINGS OF SECURITIES IN THE UNITED STATES A. Name of issuer or person filing (“Filer”): Westpac Banking Corporation B. This is (select one): ¨ an

THIRTY-SIXTH SUPPLEMENTAL INDENTURE WESTPAC BANKING CORPORATION THE BANK OF NEW YORK MELLON as Trustee Dated as of July 1, 2025

  Exhibit 4.1   Execution Version   THIRTY-SIXTH SUPPLEMENTAL INDENTURE   between   WESTPAC BANKING CORPORATION   and   THE BANK OF NEW YORK MELLON   as Trustee   Dated as of July 1, 2025         THIRTY-SIXTH SUPPLEMENTAL INDENTURE   THIRTY-SIXTH SUPPLEMENTAL INDENTURE, dated as of July 1, 2025 (the “Thirty-Sixth Supplemental Indenture”), between WESTPAC BANKING CORPORATION (ABN 33 007 457 141), a

WESTPAC BANKING CORPORATION

Exhibit 1.1 Execution Version WESTPAC BANKING CORPORATION   US$750,000,000 4.354% Notes due July 1, 2030 US$750,000,000 Floating Rate Notes due July 1, 2030 Underwriting Agreement June 24, 2025 BofA Securities, Inc. One Bryant Park New York, New York 10036 United States of America Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 United States of America J.P. Morgan Secur

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 July 1, 2025 Commission File Number 1-10167 WESTPAC BANKING CO

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 July 1, 2025 Commission File Number 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.

US$1,500,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$750,000,000 4.354% Notes due July 1, 2030 US$750,000,000 Floating Rate Notes due July 1, 2030

TABLE OF CONTENTS  Filed Pursuant to Rule 424(b)(5)  Registration Statement No. 333-283007 PROSPECTUS SUPPLEMENT (TO PROSPECTUS DATED November 5, 2024) US$1,500,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$750,000,000 4.354% Notes due July 1, 2030 US$750,000,000 Floating Rate Notes due July 1, 2030 We are offering US$750,000,000 aggregate principal amount of our 4.354% notes due Jul

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables F-3 WESTPAC BANKING CORP Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Fixed Rate Senior Debt Securities 457(r) $ 1.

US$750,000,000 4.354% Notes due July 1, 2030 US$750,000,000 Floating Rate Notes due July 1, 2030

Filed Pursuant to Rule 433 Registration Statement No. 333-283007 Free Writing Prospectus (To the Preliminary Prospectus Supplement dated June 24, 2025 and Prospectus dated November 5, 2024) June 24, 2025 US$750,000,000 4.354% Notes due July 1, 2030 US$750,000,000 Floating Rate Notes due July 1, 2030 US$750,000,000 4.354% Notes due July 1, 2030 Issuer: Westpac Banking Corporation Principal Amount:

Subject to Completion Preliminary Prospectus Supplement dated June 24, 2025

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

Sydney, NSW, 2000

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 10 June 2025 Appointment of Philippa Greenwood to the Westpac Board Westpac Banking Corporation (Westpac) has today announced the appointment of Philippa (Pip) Greenwood as an independent Non-executive Director, subject to regulatory approvals.

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 June 10, 2025 Commission File Number 1-10167 WESTPAC BANKING C

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 June 10, 2025 Commission File Number 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.

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 June 4, 2025 Commission File Number 1-10167 WESTPAC BANKING CO

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 June 4, 2025 Commission File Number 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.

ASIC PROCEEDINGS AGAINST RAMS FINANCIAL GROUP

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 4 June 2025 ASIC PROCEEDINGS AGAINST RAMS FINANCIAL GROUP Westpac has announced today that its subsidiary, RAMS Financial Group Pty Limited (RFG), has reached agreement with ASIC to resolve ASIC’s investigation into the RAMS business through agreed civil penalty proceedings filed in the Federal Court.

Level 18, 275 Kent Street

Exhibit 1 ASX Level 18, 275 Kent Street Sydney, NSW, 2000 Release 26 May 2025 Westpac appoints Chief Data, Digital and AI Officer Westpac has announced the appointment of Dr Andrew McMullan as Chief Data, Digital and AI Officer, reporting to CEO Anthony Miller.

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 May 27, 2025 Commission File Number 1-10167 WESTPAC BANKING CO

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 May 27, 2025 Commission File Number 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.

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 May 6, 2025 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 6, 2025 Commission File Number 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.

Return on equity 9.8% ex Notable Items

Exhibit 1 INTERIM FINANCIAL RESULTS FOR THE SIX MONTHS ENDED 31 MARCH 2025 Incorporating the requirements of Appendix 4D Westpac Banking Corporation ABN 33 007 457 141 WESTPAC GROUP 2025 INTERIM FINANCIAL RESULTS Acknowledgement of Indigenous Peoples Westpac acknowledges the First Peoples of Australia.

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 May 5, 2025 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 5, 2025 Commission File Number 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.

ASX Release 5 May 2025 Pillar 3 Report as at 31 March 2025 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (March 2025). For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General

Exhibit 1 ASX Release 5 May 2025 Pillar 3 Report as at 31 March 2025 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (March 2025).

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 May 5, 2025 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 5, 2025 Commission File Number 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.

ASX Release 5 May 2025 Westpac 1H25 Presentation and Investor Discussion Pack Westpac Banking Corporation (Westpac”) today provides the attached Westpac 1H25 Presentation and Investor Discussion Pack. For further information: Hayden Cooper Justin McC

Exhibit 1 ASX Release 5 May 2025 Westpac 1H25 Presentation and Investor Discussion Pack Westpac Banking Corporation (Westpac”) today provides the attached Westpac 1H25 Presentation and Investor Discussion Pack.

ASX Release 5 May 2025 Westpac 2025 Interim Financial Results Announcement (incorporating the requirements of Appendix 4D) Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2025 Interim Financial Results Announcement (incorp

Exhibit 1 ASX Release 5 May 2025 Westpac 2025 Interim Financial Results Announcement (incorporating the requirements of Appendix 4D) Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2025 Interim Financial Results Announcement (incorporating the requirements of Appendix 4D).

Appendix 3A.1 - Notification of dividend / distribution Appendix 3A.1 - Notification of dividend / distribution 1 / 6 Announcement Summary Entity name WESTPAC BANKING CORPORATION Security on which the Distribution will be paid WBC - ORDINARY FULLY PA

Exhibit 2 Appendix 3A.1 - Notification of dividend / distribution Appendix 3A.1 - Notification of dividend / distribution 1 / 6 Announcement Summary Entity name WESTPAC BANKING CORPORATION Security on which the Distribution will be paid WBC - ORDINARY FULLY PAID Announcement Type New announcement Date of this announcement 5/5/2025 Distribution Amount AUD 0.76000000 Ex Date 8/5/2025 Record Date 9/5

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 May 5, 2025 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 5, 2025 Commission File Number 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.

Sydney, NSW, 2000

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 30 April 2025 WESTPAC’S HALF YEAR 2025 (1H25) NOTABLE ITEMS AND REPORTING CHANGES 1H25 Notable Items Westpac’s reported net profit after tax in 1H25 will be reduced by $140 million due to Notable Items that relate solely to hedging items, which reverse over time.

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 April 30, 2025 Commission File Number 1-10167 WESTPAC BANKING

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 April 30, 2025 Commission File Number 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.

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 April 29, 2025 Commission File Number 1-10167 WESTPAC BANKING

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 April 29, 2025 Commission File Number 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.

Sydney, NSW, 2000

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 29 April 2025 Westpac appoints Acting Chief Executive, Consumer Westpac has announced the appointment of Carolyn McCann as Acting Chief Executive, Consumer, effective 12 May 2025.

Level 18, 275 Kent Street

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 2 April 2025 Westpac appoints new Chief People Officer Westpac has announced the appointment of Kate Dee to the position of Chief People Officer, reporting directly to CEO Anthony Miller.

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 April 2, 2025 Commission File Number 1-10167 WESTPAC BANKING C

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 April 2, 2025 Commission File Number 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.

ASX Release 28 March 2025 Westpac market update Westpac Banking Corporation (“Westpac”) today provides the attached update. For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relations 0402

Exhibit 99.1 ASX Release 28 March 2025 Westpac market update Westpac Banking Corporation (“Westpac”) today provides the attached update. For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relations 0402 393 619 0422 800 321 This document has been authorised for release by Tim Hartin, Company Secretary. Level 18, 275 Kent Street Sydney, NS

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 March 28, 2025 Commission File Number 1-10167 WESTPAC BANKING

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 March 28, 2025 Commission File Number 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.

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 March 17, 2025 Commission File Number 1-10167 WESTPAC BANKING

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 March 17, 2025 Commission File Number 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.

Level 18, 275 Kent Street

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 17 March 2025 Westpac appoints new Chief Financial Officer Westpac has announced the appointment of Nathan Goonan as Chief Financial Officer, subject to regulatory approval.

WESTPAC SETTLES AUTO FINANCE CLASS ACTION

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 14 March 2025 WESTPAC SETTLES AUTO FINANCE CLASS ACTION The Westpac Group has agreed to settle the class action relating to flex commissions paid to auto dealers from 1 March 2013 to 31 October 2018, without any admission of liability.

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 March 14, 2025 Commission File Number 1-10167 WESTPAC BANKING

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 March 14, 2025 Commission File Number 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.

7 March 2025

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 7 March 2025 Westpac Executive Change Westpac has announced Chief Executive, Consumer, Jason Yetton, has decided to leave the bank and a recruitment process is underway for a successor.

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 March 7, 2025 Commission File Number 1-10167 WESTPAC BANKING C

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 March 7, 2025 Commission File Number 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.

Level 18, 275 Kent Street

Exhibit 1 ASX Level 18, 275 Kent Street Sydney, NSW, 2000 Release 21 February 2025 Appointment of Chief Transformation Officer Westpac has announced the appointment of Peter Herbert as Chief Transformation Officer, effective Monday 3 March 2025.

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 February 21, 2025 Commission File Number 1-10167 WESTPAC BANKI

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 February 21, 2025 Commission File Number 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.

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 February 18, 2025 Commission File Number 1-10167 WESTPAC BANKI

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 February 18, 2025 Commission File Number 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.

ASX Release 17 February 2025 Pillar 3 Report as at 31 December 2024 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (December 2024). For further information: Hayden Cooper Justin McCarthy Group Head of Media Relati

Exhibit 1 ASX Release 17 February 2025 Pillar 3 Report as at 31 December 2024 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (December 2024).

ASX Release 17 February 2025 WESTPAC 1Q25 UPDATE Following is Westpac’s 1Q25 update for the three months ended 31 December 2024. For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relations

Exhibit 2 ASX Release 17 February 2025 WESTPAC 1Q25 UPDATE Following is Westpac’s 1Q25 update for the three months ended 31 December 2024.

ASX Release 17 February 2025 WESTPAC 1Q25 INVESTOR DISCUSSION PACK For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relations 0402 393 619 0422 800 321 This document has been authorised fo

Exhibit 3 ASX Release 17 February 2025 WESTPAC 1Q25 INVESTOR DISCUSSION PACK For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relations 0402 393 619 0422 800 321 This document has been authorised for release by Tim Hartin, Company Secretary.

For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relations 0402 393 619 0422 800 321 This document has been authorised for release by Tim Hartin, Company Secretary.

Exhibit 1 ASX Release 10 February 2025 Appointment of Non-executive Directors to the Westpac Board Westpac Banking Corporation (Westpac) has today announced the appointment of Debra Hazelton and David Cohen as independent Non-executive Directors, subject to regulatory approval.

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 February 10, 2025 Commission File Number 1-10167 WESTPAC BANKI

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 February 10, 2025 Commission File Number 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.

For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relations 0402 393 619 0422 800 321 This document has been authorised for release by Tim Hartin, Company Secretary. Biography – Paul Fowler

Exhibit 1 ASX Release 4 February 2025 Chief Executive, Business & Wealth Westpac has appointed Paul Fowler to the position of Chief Executive, Business & Wealth.

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 February 4, 2025 Commission File Number 1-10167 WESTPAC BANKIN

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 February 4, 2025 Commission File Number 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.

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 December 17, 2024 Commission File Number 1-10167 WESTPAC BANKI

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 December 17, 2024 Commission File Number 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.

ASX Release 17 December 2024 Retirement of Chief Financial Officer Westpac CEO Anthony Miller today announced that Michael Rowland has notified of his intention to retire as Chief Financial Officer in 2025. Michael has been with Westpac since 2020. “

Exhibit 1 ASX Release 17 December 2024 Retirement of Chief Financial Officer Westpac CEO Anthony Miller today announced that Michael Rowland has notified of his intention to retire as Chief Financial Officer in 2025.

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 December 16, 2024 Commission File Number 1-10167 WESTPAC BANKI

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 December 16, 2024 Commission File Number 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.

ANNUAL GENERAL MEETING Friday, 13 December, 2024 WESTPAC BANKING CORPORATION Short Description For Against For Against Abstain ** As required by section 251AA(2) of the Corporations Act 2001 (Commonwealth) the following statistics are provided in res

Exhibit 1 ASX Release 13 December 2024 Results of 2024 Annual General Meeting and Change of Auditor In accordance with ASX Listing Rule 3.

4 DECEMBER 2024 Westpac Banking Corporation ABN 33 007 457 141 MARKET UPDATE SUSTAINABILITY SUSTAINABILITY MARKET UPDATE - AGENDA 2 Westpac December 2024 Sustainability Update SUSTAINABILITY 1 STRATEGY PROGRESS MICHAEL CHEN Acting Chief Sustainabilit

Exhibit 1 ASX Release 04 December 2024 Westpac Sustainability Update Westpac Banking Corporation (“Westpac”) today provides the attached Westpac Sustainability update.

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 December 4, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 December 4, 2024 Commission File Number 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.

THIRTY-FIFTH SUPPLEMENTAL INDENTURE WESTPAC BANKING CORPORATION THE BANK OF NEW YORK MELLON as Trustee Dated as of November 20, 2024 THIRTY-FIFTH SUPPLEMENTAL INDENTURE

Exhibit 4.1 Execution Version THIRTY-FIFTH SUPPLEMENTAL INDENTURE between WESTPAC BANKING CORPORATION and THE BANK OF NEW YORK MELLON as Trustee Dated as of November 20, 2024 THIRTY-FIFTH SUPPLEMENTAL INDENTURE THIRTY-FIFTH SUPPLEMENTAL INDENTURE, dated as of November 20, 2024 (the “Thirty-Fifth Supplemental Indenture”), between WESTPAC BANKING CORPORATION (ABN 33 007 457 141), a company incorpora

FIRST SUPPLEMENTAL INDENTURE WESTPAC BANKING CORPORATION THE BANK OF NEW YORK MELLON as Trustee Dated as of November 20, 2024 FIRST SUPPLEMENTAL INDENTURE

Exhibit 4.1 Execution Version FIRST SUPPLEMENTAL INDENTURE between WESTPAC BANKING CORPORATION and THE BANK OF NEW YORK MELLON as Trustee Dated as of November 20, 2024 FIRST SUPPLEMENTAL INDENTURE FIRST SUPPLEMENTAL INDENTURE, dated as of November 20, 2024 (the “First Supplemental Indenture”), between WESTPAC BANKING CORPORATION (ABN 33 007 457 141), a company incorporated in the Commonwealth of A

WESTPAC BANKING CORPORATION US$1,500,000,000 5.618% Subordinated Notes due 2035 Underwriting Agreement

Exhibit 1.1 Execution Version WESTPAC BANKING CORPORATION US$1,500,000,000 5.618% Subordinated Notes due 2035 Underwriting Agreement November 12, 2024 BofA Securities, Inc. One Bryant Park New York, New York 10036 United States of America Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 United States of America HSBC Securities (USA) Inc. 66 Hudson Boulevard New York, New

WESTPAC BANKING CORPORATION

  Exhibit 1.1   Execution Version WESTPAC BANKING CORPORATION   US$750,000,000 4.600% Notes due October 20, 2026   US$750,000,000 Floating Rate Notes due October 20, 2026   Underwriting Agreement   November 12, 2024   BofA Securities, Inc. One Bryant Park New York, New York 10036 United States of America   Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 United States of

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 20, 2024 Commission File Number 1- 10167 WESTPAC BANK

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 20, 2024 Commission File Number 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.

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 20, 2024 Commission File Number 1-10167 WESTPAC BANKI

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 20, 2024 Commission File Number 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.

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables F-3 WESTPAC BANKING CORP Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Subordinated Debt Securities 457(r) $ 1,500,000,000.

US$1,500,000,000 Westpac Banking Corporation (ABN 33 007 457 141) 5.618% Subordinated Notes due 2035 Subject, upon the occurrence of a Non-Viability Trigger Event, to Conversion or possible Write-off, as more fully described in the accompanying prosp

TABLE OF CONTENTS  Filed Pursuant to Rule 424(b)(5)  Registration Statement No. 333-283008 PROSPECTUS SUPPLEMENT (TO PROSPECTUS DATED NOVEMBER 5, 2024) US$1,500,000,000 Westpac Banking Corporation (ABN 33 007 457 141) 5.618% Subordinated Notes due 2035 Subject, upon the occurrence of a Non-Viability Trigger Event, to Conversion or possible Write-off, as more fully described in the accompanying pro

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables F-3 WESTPAC BANKING CORP Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Fixed Rate Senior Debt Securities 457(r) $ 749,812,500.

US$1,500,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$750,000,000 4.600% Notes due October 20, 2026 US$750,000,000 Floating Rate Notes due October 20, 2026

TABLE OF CONTENTS  Filed Pursuant to Rule 424(b)(5)  Registration Statement No. 333-283007 PROSPECTUS SUPPLEMENT (TO PROSPECTUS DATED November 5, 2024) US$1,500,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$750,000,000 4.600% Notes due October 20, 2026 US$750,000,000 Floating Rate Notes due October 20, 2026 We are offering US$750,000,000 aggregate principal amount of our 4.600% notes

US$1,500,000,000 5.618% Subordinated Notes due 2035 Subject, upon the occurrence of a Non-Viability Trigger Event, to Conversion or possible Write-off, as more fully described in the Preliminary Prospectus Supplement dated November 12, 2024 (the “Pre

Filed Pursuant to Rule 433 Registration Statement No. 333-283008 Free Writing Prospectus (To the Preliminary Prospectus Supplement dated November 12, 2024 and Prospectus dated November 5, 2024) November 12, 2024 US$1,500,000,000 5.618% Subordinated Notes due 2035 Subject, upon the occurrence of a Non-Viability Trigger Event, to Conversion or possible Write-off, as more fully described in the Preli

US$750,000,000 4.600% Notes due October 20, 2026 US$750,000,000 Floating Rate Notes due October 20, 2026

Filed Pursuant to Rule 433 Registration Statement No. 333-283007 Free Writing Prospectus (To the Preliminary Prospectus Supplement dated November 12, 2024 and Prospectus dated November 5, 2024) November 12, 2024 US$750,000,000 4.600% Notes due October 20, 2026 US$750,000,000 Floating Rate Notes due October 20, 2026 US$750,000,000 4.600% Notes due October 20, 2026 Issuer: Westpac Banking Corporatio

Subject to Completion Preliminary Prospectus Supplement dated November 12, 2024

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

Subject to Completion Preliminary Prospectus Supplement dated November 12, 2024

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

Retirement of Group Executive, HR

Exhibit 1 Level 18, 275 Kent Street Sydney, NSW, 2000 5 November 2024 Retirement of Group Executive, HR Westpac CEO, Peter King has announced the retirement of Christine Parker, Group Executive, Human Resources.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTE

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) ¨ THE BANK OF NEW YORK MELLON (Exact name of trustee as specified in its charter) New York (Jurisdiction

SECTION 906 CERTIFICATIONS Pursuant to 18 U.S.C. § 1350

Exhibit 13 152 WESTPAC GROUP 2024 ANNUAL REPORT EXHIBIT 13 SECTION 906 CERTIFICATIONS Pursuant to 18 U.

POWER OF ATTORNEY

Exhibit 24.1 POWER OF ATTORNEY Each of the undersigned does hereby: (i) make, constitute and appoint each of, Michael Rowland, Chief Financial Officer, Joanne Dawson, Group Treasurer, Alexander Bischoff, Managing Director, Balance Sheet, Liquidity & Funding Management, Bharat Anand, General Manager, Group Finance, Stuart Brown, Managing Director, Head of Corporate and Institutional Banking, Intern

Consent of Independent Registered Public Accounting Firm

Exhibit 15.1 FINANCIAL STATEMENTS EXHIBITS INDEX STRATEGIC REVIEW PERFORMANCE REVIEW SHAREHOLDER INFORMATION 153 EXHIBIT 15.1 Consent of Independent Registered Public Accounting Firm We hereby consent to the incorporation by reference in the Registration Statements on Form F-3 (Nos. 333-260702 and 333-260703) of Westpac Banking Corporation of our report dated 3 November 2024 relating to the financ

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTE

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) ¨ THE BANK OF NEW YORK MELLON (Exact name of trustee as specified in its charter) New York (Jurisdiction

United States Securities and Exchange Commission Washington, D.C. 20549 Form F-N APPOINTMENT OF AGENT FOR SERVICE OF PROCESS BY FOREIGN BANKS AND FOREIGN INSURANCE COMPANIES AND CERTAIN OF THEIR HOLDING COMPANIES AND FINANCE SUBSIDIARIES MAKING PUBLI

United States Securities and Exchange Commission Washington, D.C. 20549 Form F-N APPOINTMENT OF AGENT FOR SERVICE OF PROCESS BY FOREIGN BANKS AND FOREIGN INSURANCE COMPANIES AND CERTAIN OF THEIR HOLDING COMPANIES AND FINANCE SUBSIDIARIES MAKING PUBLIC OFFERINGS OF SECURITIES IN THE UNITED STATES A. Name of issuer or person filing (“Filer”): Westpac Banking Corporation B. This is (select one): x an

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 5, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 5, 2024 Commission File Number 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.

AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 5, 2024

TABLE OF CONTENTS AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 5, 2024 Registration No.

SECTION 302 CERTIFICATION

Exhibit 12 150 WESTPAC GROUP 2024 ANNUAL REPORT EXHIBIT 12 SECTION 302 CERTIFICATION I, Peter Francis King, certify that: 1.

156 WESTPAC GROUP 2024 ANNUAL REPORT HOW WE CREATE VALUE OUR FOUNDATIONS OUR BUSINESS THE VALUE WE CREATEa Passionate people who make a difference Data-informed insights and decision making Proactive risk management and risk culture Strong balance sh

Exhibit 15.2 154 WESTPAC GROUP 2024 ANNUAL REPORT EXHIBIT 15.2 Westpac Group 2024 Annual Report on Form 20-F Section 1 156 Strategic review 156 Corporate governance 196 Directors’ report 222 Remuneration report 236 Information on Westpac 263 Section 2 270 Reading this report 271 Group performance 276 Performance summary 276 Key financial information 277 Impact of Notable Items 278 Review of earnin

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables F-3 WESTPAC BANKING CORP Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Subordinated Debt Securities 457(r) 0.

AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 5, 2024

TABLE OF CONTENTS AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 5, 2024 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 Or ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30, 2024 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT

Level 18, 275 Kent Street

Exhibit 1 Level 18, 275 Kent Street Sydney, NSW, 2000 6 November 2024 RETIREMENT OF NON-EXECUTIVE DIRECTORS Westpac Banking Corporation (Westpac) today announced the retirement from the Board of Independent Non-executive Directors Dr Nora Scheinkestel and Audette Exel AO.

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables F-3 WESTPAC BANKING CORP Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Senior Debt Securities 457(r) 0.

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 5, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 5, 2024 Commission File Number 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.

POWER OF ATTORNEY

Exhibit 24.1 POWER OF ATTORNEY Each of the undersigned does hereby: (i) make, constitute and appoint each of, Michael Rowland, Chief Financial Officer, Joanne Dawson, Group Treasurer, Alexander Bischoff, Managing Director, Balance Sheet, Liquidity & Funding Management, Bharat Anand, General Manager, Group Finance, Stuart Brown, Managing Director, Head of Corporate and International Banking, Intern

368 WESTPAC GROUP

Exhibit 16.1 368 WESTPAC GROUP 2024 ANNUAL REPORT EXHIBIT 16.1 Letter from PricewaterhouseCoopers to the SEC November 5, 2024 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Commissioners: We have read the statements made by Westpac Banking Corporation pursuant to Item 16F of Form 20-F (copy attached), which we understand will be filed with the Securities and Exchange Co

FIFTH AMENDED AND RESTATED SUBORDINATED INDENTURE WESTPAC BANKING CORPORATION THE BANK OF NEW YORK MELLON as Trustee Dated as of November 5, 2024 Providing for Issuance of Subordinated Debt Securities in Series

Exhibit 4.2 FIFTH AMENDED AND RESTATED SUBORDINATED INDENTURE between WESTPAC BANKING CORPORATION and THE BANK OF NEW YORK MELLON as Trustee Dated as of November 5, 2024 Providing for Issuance of Subordinated Debt Securities in Series Reconciliation and tie between this Fifth Amended and Restated Subordinated Indenture, dated as of November 5, 2024, and the Trust Indenture Act of 1939, as amended.

Westpac Group Securities Trading Policy

Exhibit 11(B) 138 WESTPAC GROUP 2024 ANNUAL REPORT EXHIBIT 11(B): INSIDER TRADING POLICIES Securities trading Westpac’s Group Securities Trading Policy prohibits Directors, employees, secondees and contractors from trading in any securities and other financial products that they possess inside information on.

United States Securities and Exchange Commission Washington, D.C. 20549 Form F-N APPOINTMENT OF AGENT FOR SERVICE OF PROCESS BY FOREIGN BANKS AND FOREIGN INSURANCE COMPANIES AND CERTAIN OF THEIR HOLDING COMPANIES AND FINANCE SUBSIDIARIES MAKING PUBLI

United States Securities and Exchange Commission Washington, D.C. 20549 Form F-N APPOINTMENT OF AGENT FOR SERVICE OF PROCESS BY FOREIGN BANKS AND FOREIGN INSURANCE COMPANIES AND CERTAIN OF THEIR HOLDING COMPANIES AND FINANCE SUBSIDIARIES MAKING PUBLIC OFFERINGS OF SECURITIES IN THE UNITED STATES A. Name of issuer or person filing (“Filer”): Westpac Banking Corporation B. This is (select one): x an

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 4, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 4, 2024 Commission File Number 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.

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 4, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 4, 2024 Commission File Number 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.

ASX Release 4 November 2024 Westpac 2024 Group Annual Report and Appendix 4E Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2024 Group Annual Report and Appendix 4E. For further information: Hayden Cooper Justin McCarthy

Exhibit 1 ASX Release 4 November 2024 Westpac 2024 Group Annual Report and Appendix 4E Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2024 Group Annual Report and Appendix 4E.

ASX Release 4 November 2024 2024 Risk Factors Westpac Banking Corporation (“Westpac”) today provides the attached 2024 Risk Factors. For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Manager, Investor Relati

Exhibit 1 ASX Release 4 November 2024 2024 Risk Factors Westpac Banking Corporation (“Westpac”) today provides the attached 2024 Risk Factors.

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 4, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 4, 2024 Commission File Number 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.

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 4, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 4, 2024 Commission File Number 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.

PRESENTATION 2024 FULL YEAR FINANCIAL RESULTS FOR THE 12 MONTHS ENDED 30 SEPTEMBER 2024 AND INVESTOR DISCUSSION PACK Westpac Banking Corporation ABN 33 007 457 141 2 Westpac Group 2024 Full Year Results Presentation & Investor Discussion Pack WESTPAC

Exhibit 1 ASX Release 4 November 2024 Westpac 2024 Presentation and Investor Discussion Pack Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2024 Presentation and Investor Discussion Pack.

ASX Release 4 November 2024 Westpac 2024 Climate Report Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2024 Climate Report. For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General Mana

Exhibit 1 ASX Release 4 November 2024 Westpac 2024 Climate Report Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2024 Climate Report.

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 4, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 4, 2024 Commission File Number 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.

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 4, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 4, 2024 Commission File Number 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.

PILLAR 3 REPORT SEPTEMBER 2024 INCORPORATING THE REQUIREMENTS OF APS330 WESTPAC BANKING CORPORATION ABN 33 007 457 141 Acknowledgement of Indigenous Peoples Westpac acknowledges the First Peoples of Australia. We recognise their ongoing role as Tradi

Exhibit 1 ASX Release 04 November 2024 Pillar 3 Report as at 30 September 2024 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (September 2024).

FINANCIAL PERFORMANCE REVIEW WESTPAC BANKING CORPORATION ABN 33 007 457 141 2024 SECOND HALF 2 WESTPAC GROUP 2024 SECOND HALF FINANCIAL PERFORMANCE REVIEW Contents GROUP PERFORMANCE 3 Performance overview 3 Performance summary 4 Key financial informa

Exhibit 1 ASX Release 4 November 2024 Westpac 2024 Second Half Financial Performance Review Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2024 Second Half Financial Performance Review.

ASX Release 4 November 2024 Appendix 4G and 2024 Corporate Governance Statement Westpac Banking Corporation (“Westpac”) today provides the attached Appendix 4G and Westpac Group 2024 Corporate Governance Statement. For further information: Hayden Coo

Exhibit 1 ASX Release 4 November 2024 Appendix 4G and 2024 Corporate Governance Statement Westpac Banking Corporation (“Westpac”) today provides the attached Appendix 4G and Westpac Group 2024 Corporate Governance Statement.

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 4, 2024 Commission File Number 1-10167 WESTPAC BANKIN

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 4, 2024 Commission File Number 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.

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 22 October, 2024 Commission File Number 1-10167 WESTPAC BANKIN

6-K 1 tm2423589d46k.htm FORM 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 22 October, 2024 Commission File Number 1-10167 WESTPAC BANKING CORPORATION (Translation of registrant’s name into English) 275 KENT STREET, SYDNEY, NEW SOUTH WALES 2000, AUSTRALI

Appendix 1 - Summary of FY24 and 2H24 Notable Items $m Economic hedges Hedge ineffectiveness Total FY24 Net interest income (171) 8 (163) Non-interest income (12) - (12) Net operating income (183) 8 (175) Operating expenses - - - Pre-provision profit

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 22 October 2024 WESTPAC’S FULL YEAR 2024 (FY24) NOTABLE ITEMS AND REPORTING CHANGES FY24 Notable Items Westpac’s reported net profit after tax in FY24 will be reduced by $123 million due to Notable Items that relate solely to unrealised fair value gains and losses on economic hedges and net ineffectiveness on qualifying hedges, which reverse over time.

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 3 October, 2024 Commission File Number 1-10167 WESTPAC BANKING

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 3 October, 2024 Commission File Number 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.

WESTPAC ENTERS INTO AGREEMENT TO SELL AUTO FINANCE LOAN BOOK

Exhibit 1 ASX Release Level 18, 275 Kent Street Sydney, NSW, 2000 3 October 2024 WESTPAC ENTERS INTO AGREEMENT TO SELL AUTO FINANCE LOAN BOOK Westpac has entered into an agreement to sell its auto finance loans and lease receivables to Resimac Group Limited (ASX: RMC, “Resimac”).

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 September 26, 2024 Commission File Number 1-10167 WESTPAC BANK

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 September 26, 2024 Commission File Number 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.

BUSINESS SPOTLIGHT Westpac Banking Corporation ABN 33 007 457 141 26 SEPTEMBER 2024 MORTGAGES – FROM APPLICATION TO SETTLEMENT Damien MacRae, Managing Director Mortgages Bhaskar Katta, General Manager Group Operations Peta Brown, Head of Operations,

Exhibit 1 ASX Release 26 September 2024 Westpac Business Spotlight Westpac Banking Corporation (“Westpac”) today provides the attached Business Spotlight Pack which includes information relating to: • Mortgages – from application to settlement; • Business Lending; • Cyber and Scams; and • Artificial Intelligence.

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 September 9, 2024 Commission File Number 1-10167 WESTPAC BANKI

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 September 9, 2024 Commission File Number 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.

Level 18, 275 Kent Street

Exhibit 1 Level 18, 275 Kent Street Sydney, NSW, 2000 9 September 2024 Anthony Miller appointed Chief Executive Officer of Westpac The Westpac Board of Directors has announced the appointment of Anthony Miller as Group CEO and Managing Director, commencing 16 December 2024.

3Q24 INVESTOR DISCUSSION PACK FOR THE 3 MONTHS ENDED 30 JUNE 2024 © Westpac Banking Corporation ABN 33 007 457 141 This document should be read in conjunction with Westpac’s June 2024 Pillar 3 Report. All amounts are in Australian dollars. 3Q24 SUMMA

Exhibit 3 ASX Release 19 August 2024 WESTPAC 3Q24 INVESTOR DISCUSSION PACK Following are Westpac’s 3Q24 slides covering financial performance, capital, credit quality and funding for the three months ended 30 June 2024.

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 19, 2024 Commission File Number 1-10167 WESTPAC BANKING

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 19, 2024 Commission File Number 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.

ASX ANNOUNCEMENT I WESTPAC 3Q24 UPDATE ASX ANNOUNCEMENT 3Q24 UPDATE 19 AUGUST 2024 FINANCIAL HIGHLIGHTS $1.8bn Unaudited net profit up 6% on 1H24 average up 2% ex Notable Items 1.92% Net interest margin up 3bps on 1H24 12.0% CET1 capital ratio above

Exhibit 2 ASX Release 19 August 2024 WESTPAC 3Q24 UPDATE Following is Westpac’s 3Q24 update for the three months ended 30 June 2024.

JUNE 2024 INCORPORATING THE REQUIREMENTS OF APS 330 WESTPAC BANKING CORPORATION ABN 33 007 457 141 Pillar 3 Report Table of contents Acknowledgment of Indigenous Peoples Westpac acknowledges the First Peoples of Australia and recognises their ongoing

Exhibit 1 ASX Release 19 August 2024 Pillar 3 Report as at 30 June 2024 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (June 2024).

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 6, 2024 Commission File Number 1-10167 WESTPAC BANKING

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 6, 2024 Commission File Number 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.

WESTPAC CLOSES RAMS TO NEW BUSINESS AND RETAINS EXISTING RAMS LOAN PORTFOLIO

Exhibit 1 Level 18, 275 Kent Street Sydney, NSW, 2000 6 August 2024 WESTPAC CLOSES RAMS TO NEW BUSINESS AND RETAINS EXISTING RAMS LOAN PORTFOLIO Westpac has completed its strategic review of the RAMS Financial Group Pty Limited (RAMS) and will further simplify its business by closing RAMS to new home loan applications from today.

Sydney, NSW, 2000

Exhibit 1 Level 18, 275 Kent Street Sydney, NSW, 2000 19 July 2024 Reduction in operational risk capital overlay Westpac acknowledges the Australian Prudential Regulation Authority’s (APRA) decision to reduce Westpac’s total operational risk capital overlay from $1 billion to $500 million.

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 July 19, 2024 Commission File Number 1-10167 WESTPAC BANKING C

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 July 19, 2024 Commission File Number 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.

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 May 28, 2024 Commission File Number 1-10167 WESTPAC BANKING CO

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 May 28, 2024 Commission File Number 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.

Sydney, NSW, 2000

Exhibit 1 Level 18, 275 Kent Street Sydney, NSW, 2000 27 May 2024 Fitch Ratings (Fitch) upgrades ratings for Westpac Banking Corporation (Westpac) Today Fitch upgraded Westpac’s Long-Term Issuer Default Rating (IDR) by one notch to 'AA-'.

WESTPAC BANKING CORPORATION US$750,000,000 5.200% Notes due April 16, 2026 US$750,000,000 5.050% Notes due April 16, 2029 US$750,000,000 Floating Rate Notes due April 16, 2026 US$750,000,000 Floating Rate Notes due April 16, 2029 Underwriting Agreeme

Exhibit 1.1 Execution Version WESTPAC BANKING CORPORATION US$750,000,000 5.200% Notes due April 16, 2026 US$750,000,000 5.050% Notes due April 16, 2029 US$750,000,000 Floating Rate Notes due April 16, 2026 US$750,000,000 Floating Rate Notes due April 16, 2029 Underwriting Agreement May 8, 2024 Barclays Capital Inc. 745 Seventh Avenue New York, New York 10019 United States of America BofA Securitie

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 May 16, 2024 Commission File Number 1- 10167 WESTPAC BANKING C

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 May 16, 2024 Commission File Number 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.

THIRTY-FOURTH SUPPLEMENTAL INDENTURE WESTPAC BANKING CORPORATION THE BANK OF NEW YORK MELLON as Trustee Dated as of May 16, 2024 THIRTY-FOURTH SUPPLEMENTAL INDENTURE

Exhibit 4.1 Execution Version THIRTY-FOURTH SUPPLEMENTAL INDENTURE between WESTPAC BANKING CORPORATION and THE BANK OF NEW YORK MELLON as Trustee Dated as of May 16, 2024 THIRTY-FOURTH SUPPLEMENTAL INDENTURE THIRTY-FOURTH SUPPLEMENTAL INDENTURE, dated as of May 16, 2024 (the “Thirty-Fourth Supplemental Indenture”), between WESTPAC BANKING CORPORATION (ABN 33 007 457 141), a company incorporated in

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 May 15, 2024 Commission File Number 1-10167 WESTPAC BANKING CO

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 May 15, 2024 Commission File Number 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.

Exhibit 1 ASX Release 14 May 2024 Appointment of Andy Maguire to the Westpac Board Westpac Banking Corporation (Westpac) has today announced the appointment of Andy Maguire as an independent Non-executive Director. Mr Maguire is expected to join the

Exhibit 1 ASX Release 14 May 2024 Appointment of Andy Maguire to the Westpac Board Westpac Banking Corporation (Westpac) has today announced the appointment of Andy Maguire as an independent Non-executive Director.

US$3,000,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$750,000,000  5.200% Notes due April 16, 2026 US$750,000,000  5.050% Notes due April 16, 2029 US$750,000,000 Floating Rate Notes due April 16, 2026 US$750,000,000 Floating Rate Notes

TABLE OF CONTENTS  Filed Pursuant to Rule 424(b)(5)  Registration Statement No. 333-260702 PROSPECTUS SUPPLEMENT (TO PROSPECTUS DATED NOVEMBER 3, 2021) US$3,000,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$750,000,000  5.200% Notes due April 16, 2026 US$750,000,000  5.050% Notes due April 16, 2029 US$750,000,000 Floating Rate Notes due April 16, 2026 US$750,000,000 Floating Rate Not

Calculation of Filing Fee Tables (Form Type) Westpac Banking Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Tables 424(b)(5)1 (Form Type) Westpac Banking Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial effective date Filing Fee Previously Paid In Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to Be Paid Senior Debt Securities 5.

US$750,000,000 5.200% Notes due April 16, 2026 US$750,000,000 Floating Rate Notes due April 16, 2026 US$750,000,000 5.050% Notes due April 16, 2029 US$750,000,000 Floating Rate Notes due April 16, 2029

Filed Pursuant to Rule 433 Registration Statement No. 333-260702 Free Writing Prospectus (To the Preliminary Prospectus Supplement dated May 8, 2024 and Prospectus dated November 3, 2021) May 8, 2024 US$750,000,000 5.200% Notes due April 16, 2026 US$750,000,000 Floating Rate Notes due April 16, 2026 US$750,000,000 5.050% Notes due April 16, 2029 US$750,000,000 Floating Rate Notes due April 16, 202

Subject to Completion Preliminary Prospectus Supplement dated May 8, 2024

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

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 May 7, 2024 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 7, 2024 Commission File Number 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.

$3,342m Net profit, up 5% on 2H23

Exhibit 1 2024 Interim Financial Results THE INTERIM FINANCIAL RESULTS ANNOUNCEMENT HAS BEEN PREPARED FOR DISTRIBUTION IN THE UNITED STATES OF AMERICA Westpac Banking Corporation ABN 33 007 457 141 ii WESTPAC GROUP 2024 INTERIM FINANCIAL RESULTS RESULTS ANNOUNCEMENT TO THE MARKET Introduction Our interim period refers to the six months ended 31 March 2024 (First Half 2024).

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 May 6, 2024 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 6, 2024 Commission File Number 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.

ASX Release 6 May 2024 Pillar 3 Report as at 31 March 2024 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (March 2024). For further information: Hayden Cooper Justin McCarthy Group Head of Media Relations General

Exhibit 1 ASX Release 6 May 2024 Pillar 3 Report as at 31 March 2024 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (March 2024).

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 May 6, 2024 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 6, 2024 Commission File Number 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.

ii WESTPAC GROUP 2024 INTERIM FINANCIAL RESULTS RESULTS ANNOUNCEMENT TO THE MARKET ASX Appendix 4D Results for announcement to the market1 Report for the half year ended 31 March 20242 Revenue from ordinary activitiesa,b ($m) down 4% to $10,590 Profi

Exhibit 1 ASX Release 6 May 2024 Westpac 2024 Interim Financial Results Announcement (incorporating the requirements of Appendix 4D) Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2024 Interim Financial Results Announcement (incorporating the requirements of Appendix 4D).

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 May 6, 2024 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 6, 2024 Commission File Number 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.

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 May 6, 2024 Commission File Number 1-10167 WESTPAC BANKING COR

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 May 6, 2024 Commission File Number 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.

ASX Release 6 May 2024 Westpac 1H24 Presentation and Investor Discussion Pack Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 1H24 Presentation and Investor Discussion Pack. For further information: Hayden Cooper Justin Mc

Exhibit 1 ASX Release 6 May 2024 Westpac 1H24 Presentation and Investor Discussion Pack Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 1H24 Presentation and Investor Discussion Pack.

Appendix 3A.1 - Notification of dividend / distribution Appendix 3A.1 - Notification of dividend / distribution 1 / 7 Announcement Summary Entity name WESTPAC BANKING CORPORATION Security on which the Distribution will be paid WBC - ORDINARY FULLY PA

Exhibit 2 Appendix 3A.1 - Notification of dividend / distribution Appendix 3A.1 - Notification of dividend / distribution 1 / 7 Announcement Summary Entity name WESTPAC BANKING CORPORATION Security on which the Distribution will be paid WBC - ORDINARY FULLY PAID Announcement Type New announcement Date of this announcement 6/5/2024 Distribution Amount AUD 0.90000000 Ex Date 9/5/2024 Record Date 10/

Exhibit 1 ASX Release 6 May 2024 Westpac completes CORE Integrated Plan Westpac has today released the 12th and final Independent Reviewer report on its Customer Outcomes and Risk Excellence (CORE) program. Promontory Australia’s final report confirm

Exhibit 1 ASX Release 6 May 2024 Westpac completes CORE Integrated Plan Westpac has today released the 12th and final Independent Reviewer report on its Customer Outcomes and Risk Excellence (CORE) program.

Appendix 1 – Summary of 1H24 Notable Items 1H24 ($m) Asset sales and revaluations Provisions for litigation, fines and penalties Restructuring costs Asset write-downs Hedging items Total Net interest income - - - - (224) (224) Non-interest income - -

Exhibit 1 ASX Release 23 April 2024 Westpac’s First Half 2024 (1H24) Notable Items and Reporting Changes 1H24 Notable Items Westpac’s reported net profit after tax in 1H24 will be reduced by $164 million due to Notable Items.

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 April 23, 2024 Commission File Number 1-10167 WESTPAC BANKING

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 April 23, 2024 Commission File Number 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.

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 April 3, 2024 Commission File Number 1-10167 WESTPAC BANKING C

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 April 3, 2024 Commission File Number 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.

EX-1

Exhibit 1 ASX Release 3 April 2024 S&P Global Ratings (S&P) upgrades ratings for Westpac Banking Corporation (Westpac) and Westpac New Zealand Limited (WNZL) Today S&P upgraded the stand-alone credit profile of Westpac by one notch to ‘a+’ from ‘a’ to reflect its assessment that industry-wide risks for Australian banks have reduced.

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 March 27, 2024 Commission File Number 1-10167 WESTPAC BANKING

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 March 27, 2024 Commission File Number 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.

ASX Release 27 March 2024 Westpac technology simplification update Westpac Banking Corporation (“Westpac”) today provides the attached Westpac technology simplification update. For further information: Hayden Cooper Justin McCarthy Group Head of Medi

Exhibit 1 ASX Release 27 March 2024 Westpac technology simplification update Westpac Banking Corporation (“Westpac”) today provides the attached Westpac technology simplification update.

Sydney, NSW, 2000

Exhibit 1 Level 18, 275 Kent Street Sydney, NSW, 2000 8 March 2024 Westpac external auditor After the completion of a competitive tender process, Westpac has confirmed KPMG as the preferred firm to be appointed as Westpac’s external auditor for the 2025 financial year, beginning 1 October 2024.

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 March 8, 2024 Commission File Number 1-10167 WESTPAC BANKING C

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 March 8, 2024 Commission File Number 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.

Exhibit 1 ASX Release 6 March 2024 Moody’s upgrades ratings for Westpac Banking Corporation Today Moody’s Investors Service (Moody’s) upgraded its ratings for Westpac Banking Corporation. The changes to Westpac’s ratings are summarised below: Previou

Exhibit 1 ASX Release 6 March 2024 Moody’s upgrades ratings for Westpac Banking Corporation Today Moody’s Investors Service (Moody’s) upgraded its ratings for Westpac Banking Corporation.

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 March 6, 2024 Commission File Number 1-10167 WESTPAC BANKING C

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 March 6, 2024 Commission File Number 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.

1Q24 INVESTOR DISCUSSION PACK FOR THE 3 MONTHS ENDED 31 DECEMBER 2023 WESTPAC BANKING CORPORATION ABN 33 007 457 141 This document should be read in conjunction with Westpac’s December 2023 Pillar 3 Report. All amounts are in Australian dollars. 1Q24

Exhibit 3 ASX Release 19 February 2024 WESTPAC 1Q24 INVESTOR DISCUSSION PACK Following is Westpac’s 1Q24 slides covering capital, credit quality, funding and financial performance for the three months ended December 2023.

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 February 20, 2024 Commission File Number 1-10167 WESTPAC BANKI

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 February 20, 2024 Commission File Number 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.

19 FEBRUARY 2024 $1.5bn Unaudited net profit, down 6% on 2H23 average 1.78% Net interest margin 12.3% CET1 capital ratio, down 9bps on Sep-23 $1.8bn Unaudited net profit ex Notable Items, flat on 2H23 average 1.80% Core NIM1 , down 4bps on 2H23 1.37%

Exhibit 2 ASX Release 19 FEBRUARY 2024 WESTPAC 1Q24 UPDATE Following is Westpac’s 1Q24 update, for the three months ended 31 December 2023.

DECEMBER 2023 INCORPORATING THE REQUIREMENTS OF APS330 WESTPAC BANKING CORPORATION ABN 33 007 457 141 Pillar 3 Report ii WESTPAC GROUP DECEMBER 2023 PILLAR 3 REPORT Table of contents Structure of Pillar 3 Report EXECUTIVE SUMMARY 1 Introduction 3 Gro

Exhibit 1 ASX Release 19 February 2024 Pillar 3 Report as at 31 December 2023 Westpac Banking Corporation (“Westpac”) today provides the attached Pillar 3 Report (December 2023).

WEBNF / Westpac Banking Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: Westpac Banking Corp Title of Class of Securities: Common Stock CUSIP Number: 006076146 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

AU:WBC / Westpac Banking Corporation / BlackRock Inc. Passive Investment

au000000wbc1020224.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 6) WESTPAC BANKING CORP - (Name of Issuer) Common Stock - (Title of Class of Securities) B01D654 - (SEDOL Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to

ANNUAL GENERAL MEETING Thursday, 14 December, 2023 WESTPAC BANKING CORPORATION Short Description For Against For Against Abstain ** As required by section 251AA(2) of the Corporations Act 2001 (Commonwealth) the following statistics are provided in r

Exhibit 1 ASX Release 14 December 2023 Results of 2023 Annual General Meeting In accordance with ASX Listing Rule 3.

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 December 14, 2023 Commission File Number 1-10167 WESTPAC BANKI

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 December 14, 2023 Commission File Number 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.

SUSTAINABILITY MARKET UPDATE 30 November 2023 WESTPAC BANKING CORPORATION ABN 33 007 457 141 PETER KING Chief Executive Officer 3 1 This presentation contains ‘forward-looking statements’ and statements of expectation reflecting Westpac’s current vie

Exhibit 1 ASX Release 30 November 2023 Westpac Sustainability update Westpac Banking Corporation (“Westpac”) today provides the attached Sustainability update which will be referenced in a market briefing available to shareholders via webcast.

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 30, 2023 Commission File Number 1-10167 WESTPAC BANKI

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 30, 2023 Commission File Number 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.

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 17, 2023 Commission File Number 1-10167 WESTPAC BANKI

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 17, 2023 Commission File Number 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.

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 17, 2023 Commission File Number 1- 10167 WESTPAC BANK

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 17, 2023 Commission File Number 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.

WESTPAC BANKING CORPORATION US$750,000,000 6.820% Subordinated Notes due 2033 Underwriting Agreement

Exhibit 1.1 Execution Version WESTPAC BANKING CORPORATION US$750,000,000 6.820% Subordinated Notes due 2033 Underwriting Agreement November 8, 2023 BofA Securities, Inc. One Bryant Park New York, New York 10036 United States of America Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 United States of America J.P. Morgan Securities LLC 383 Madison Avenue New York, New Yor

THIRTY-THIRD SUPPLEMENTAL INDENTURE WESTPAC BANKING CORPORATION THE BANK OF NEW YORK MELLON as Trustee Dated as of November 17, 2023 THIRTY-THIRD SUPPLEMENTAL INDENTURE

Exhibit 4.1 THIRTY-THIRD SUPPLEMENTAL INDENTURE between WESTPAC BANKING CORPORATION and THE BANK OF NEW YORK MELLON as Trustee Dated as of November 17, 2023 THIRTY-THIRD SUPPLEMENTAL INDENTURE THIRTY-THIRD SUPPLEMENTAL INDENTURE, dated as of November 17, 2023 (the “Thirty-Third Supplemental Indenture”), between WESTPAC BANKING CORPORATION (ABN 33 007 457 141), a company incorporated in the Commonw

FOURTH SUPPLEMENTAL INDENTURE WESTPAC BANKING CORPORATION THE BANK OF NEW YORK MELLON as Trustee Dated as of November 17, 2023 FOURTH SUPPLEMENTAL INDENTURE

Exhibit 4.1 FOURTH SUPPLEMENTAL INDENTURE between WESTPAC BANKING CORPORATION and THE BANK OF NEW YORK MELLON as Trustee Dated as of November 17, 2023 FOURTH SUPPLEMENTAL INDENTURE FOURTH SUPPLEMENTAL INDENTURE, dated as of November 17, 2023 (the “Fourth Supplemental Indenture”), between WESTPAC BANKING CORPORATION (ABN 33 007 457 141), a company incorporated in the Commonwealth of Australia under

WESTPAC BANKING CORPORATION US$1,000,000,000 5.512% Notes due November 17, 2025 US$1,250,000,000 5.535% Notes due November 17, 2028 US$500,000,000 Floating Rate Notes due November 17, 2025 Underwriting Agreement

Exhibit 1.1 Execution Version WESTPAC BANKING CORPORATION US$1,000,000,000 5.512% Notes due November 17, 2025 US$1,250,000,000 5.535% Notes due November 17, 2028 US$500,000,000 Floating Rate Notes due November 17, 2025 Underwriting Agreement November 8, 2023 BofA Securities, Inc. One Bryant Park New York, New York 10036 United States of America Citigroup Global Markets Inc. 388 Greenwich Street Ne

Calculation of Filing Fee Tables (Form Type) Westpac Banking Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Tables 424(b)(5)(1) (Form Type) Westpac Banking Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial effective date Filing Fee Previously Paid In Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to Be Paid Subordinated Debt Securities 6.

US$750,000,000 Westpac Banking Corporation (ABN 33 007 457 141) 6.820% Subordinated Notes due 2033 Subject, upon the occurrence of a Non-Viability Trigger Event, to Conversion or possible Write-off, as more fully described in the accompanying prospec

TABLE OF CONTENTS  Filed Pursuant to Rule 42(b)(5)  Registration Statement No.333-260703 PROSPECTUS SUPPLEMENT (TO PROSPECTUS DATED NOVEMBER 3, 2021) US$750,000,000 Westpac Banking Corporation (ABN 33 007 457 141) 6.820% Subordinated Notes due 2033 Subject, upon the occurrence of a Non-Viability Trigger Event, to Conversion or possible Write-off, as more fully described in the accompanying prospec

US$2,750,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$1,000,000,000 5.512% Notes due November 17, 2025 US$1,250,000,000 5.535% Notes due November 17, 2028 US$500,000,000 Floating Rate Notes due November 17, 2025

TABLE OF CONTENTS  Filed Pursuant to Rule 424(b)(5)  Registration Statement No. 333-260702 PROSPECTUS SUPPLEMENT (TO PROSPECTUS DATED NOVEMBER 3, 2021) US$2,750,000,000 Westpac Banking Corporation (ABN 33 007 457 141) US$1,000,000,000 5.512% Notes due November 17, 2025 US$1,250,000,000 5.535% Notes due November 17, 2028 US$500,000,000 Floating Rate Notes due November 17, 2025 We are offering US$1,

Calculation of Filing Fee Tables (Form Type) Westpac Banking Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Tables 424(b)(5)1 (Form Type) Westpac Banking Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial effective date Filing Fee Previously Paid In Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to Be Paid Senior Debt Securities 5.

US$1,000,000,000 5.512% Notes due November 17, 2025 US$500,000,000 Floating Rate Notes due November 17, 2025 US$1,250,000,000 5.535% Notes due November 17, 2028

Filed Pursuant to Rule 433 Registration Statement No. 333-260702 Free Writing Prospectus (To the Preliminary Prospectus Supplement dated November 8, 2023 and Prospectus dated November 3, 2021) November 8, 2023 US$1,000,000,000 5.512% Notes due November 17, 2025 US$500,000,000 Floating Rate Notes due November 17, 2025 US$1,250,000,000 5.535% Notes due November 17, 2028 US$1,000,000,000 5.512% Notes

US$750,000,000 6.820% Subordinated Notes due 2033 Subject, upon the occurrence of a Non-Viability Trigger Event, to Conversion or possible Write-off, as more fully described in the Preliminary Prospectus Supplement dated November 8, 2023 (the “Prelim

Filed Pursuant to Rule 433 Registration Statement No. 333-260703 Free Writing Prospectus (To the Preliminary Prospectus Supplement dated November 8, 2023 and Prospectus dated November 3, 2021) November 8, 2023 US$750,000,000 6.820% Subordinated Notes due 2033 Subject, upon the occurrence of a Non-Viability Trigger Event, to Conversion or possible Write-off, as more fully described in the Prelimina

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 File Number 1-10167 WESTPAC BANKIN

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 File Number 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.

8 November 2023

Exhibit 1 ASX Level 18, 275 Kent Street Sydney, NSW, 2000 Release 8 November 2023 Westpac tenders external audit services Westpac announced today that it has commenced a tender for its external audit services.

Subject to Completion Preliminary Prospectus Supplement dated November 8, 2023

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

Subject to Completion Preliminary Prospectus Supplement dated November 8, 2023

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

Consent of Independent Registered Public Accounting Firm

Exhibit 15.1 139 EXHIBIT 15.1 Consent of Independent Registered Public Accounting Firm We hereby consent to the incorporation by reference in the Registration Statements on Form F-3 (Nos. 333-260702 and 333-260703) of Westpac Banking Corporation of our report dated 6 November 2023 relating to the financial statements and the effectiveness of internal control over financial reporting which appears

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 Or ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30, 2023 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT

SECTION 906 CERTIFICATIONS Pursuant to 18 U.S.C. § 1350

Exhibit 13 138 WESTPAC GROUP 2023 ANNUAL REPORT EXHIBIT 13 SECTION 906 CERTIFICATIONS Pursuant to 18 U.

141 This page has been intentionally left blank. 2023 HIGHLIGHTS1 SHAREHOLDERS CUSTOMERS OUR PEOPLE COMMUNITY ENVIRONMENT $7,195M Net Profit, up 26% #1 Australian banking app2 75 Organisational Health Index $3.4BN Taxes paid globally, including the b

Exhibit 15.2 140 WESTPAC GROUP 2023 ANNUAL REPORT Exhibit 15.2 Westpac Group 2023 Annual Report on Form 20-F Section 1 142 Strategic review 142 Corporate governance 184 Directors’ report 208 Remuneration report 222 Information on Westpac 249 Section 2 254 Reading this report 255 Group performance 259 Performance summary 259 Key financial information 259 Impact of Notable Items 260 Review of earnin

SECTION 302 CERTIFICATION

Exhibit 12 136 WESTPAC GROUP 2023 ANNUAL REPORT EXHIBIT 12 SECTION 302 CERTIFICATION I, Peter Francis King, certify that: 1.

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 6, 2023 Commission File Number 1-10167 WESTPAC BANKIN

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 6, 2023 Commission File Number 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.

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 6, 2023 Commission File Number 1-10167 WESTPAC BANKIN

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 6, 2023 Commission File Number 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.

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 6, 2023 Commission File Number 1-10167 WESTPAC BANKIN

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 6, 2023 Commission File Number 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.

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 6, 2023 Commission File Number 1-10167 WESTPAC BANKIN

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 6, 2023 Commission File Number 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.

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 6, 2023 Commission File Number 1-10167 WESTPAC BANKIN

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 6, 2023 Commission File Number 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.

WESTPAC 2023 FULL YEAR RESULTS INDEX 2023 Full Year Results Presentation 3 Investor Discussion Pack of 2023 Full Year Results 33 Earnings drivers 36 Credit quality and provisions 48 Non-credit risk management 69 Capital, Funding and Liquidity 76 Cust

Exhibit 1 ASX Release 6 November 2023 Westpac 2023 Presentation and Investor Discussion Pack Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2023 Presentation and Investor Discussion Pack.

Exhibit 1 ASX Release 6 November 2023 Westpac releases latest Independent Reviewer reports on CORE program Westpac has today released the tenth and eleventh Independent Reviewer reports for the quarters ended in June 2023 and September 2023, updating

Exhibit 1 ASX Release 6 November 2023 Westpac releases latest Independent Reviewer reports on CORE program Westpac has today released the tenth and eleventh Independent Reviewer reports for the quarters ended in June 2023 and September 2023, updating progress of its Integrated Plan to improve risk culture, governance and accountability.

This page is intentionally blank WESTPAC 2023 CLIMATE REPORT CREATING BETTER FUTURES TOGETHER Our approach to climate reporting Outlining our approach to managing climate change risks and opportunities is inherently challenging as measuring, reportin

Exhibit 1 ASX Release 6 November 2023 Westpac 2023 Climate Report Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2023 Climate Report.

ASX Appendix 4E Results for announcement to the market1 Report for the full year ended 30 September 2023² Revenue from ordinary activities3,4 ($m) up 10% to $21,645 Profit from ordinary activities after tax attributable to equity holders 4 ($m) up 26

Exhibit 1 ASX Release 6 November 2023 Westpac 2023 Group Annual Report and Appendix 4E Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2023 Group Annual Report and Appendix 4E.

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 6, 2023 Commission File Number 1-10167 WESTPAC BANKIN

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 6, 2023 Commission File Number 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.

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 6, 2023 Commission File Number 1-10167 WESTPAC BANKIN

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 6, 2023 Commission File Number 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.

FINANCIAL PERFORMANCE REVIEW WESTPAC BANKING CORPORATION ABN 33 007 457 141 2023 SECOND HALF ii WESTPAC GROUP 2023 SECOND HALF FINANCIAL PERFORMANCE REVIEW Contents GROUP PERFORMANCE Performance overview Performance summary Impact of Notable Items Re

Exhibit 1 ASX Release 6 November 2023 Westpac 2023 Second Half Financial Performance Review Westpac Banking Corporation (“Westpac”) today provides the attached Westpac 2023 Second Half Financial Performance Review.

II WESTPAC GROUP SEPTEMBER 2023 PILLAR 3 REPORT TABLE OF CONTENTS Structure of Pillar 3 Report EXECUTIVE SUMMARY 1 Introduction 4 Risk appetite and risk types 5 Controlling and managing risk 6 Group structure 11 Capital overview 13 Leverage ratio 17

Exhibit 1 PILLAR 3 REPORT SEPTEMBER 2023 INCORPORATING THE REQUIREMENTS OF APS330 WESTPAC BANKING CORPORATION ABN 33 007 457 141 II WESTPAC GROUP SEPTEMBER 2023 PILLAR 3 REPORT TABLE OF CONTENTS Structure of Pillar 3 Report EXECUTIVE SUMMARY 1 Introduction 4 Risk appetite and risk types 5 Controlling and managing risk 6 Group structure 11 Capital overview 13 Leverage ratio 17 Credit risk managemen

Rules 4.7.3 and 4.10.3 ASX Listing Rules Appendix 4G (current at 17/7/2020) Page 1 Appendix 4G Key to Disclosures Corporate Governance Council Principles and Recommendations Name of entity WESTPAC BANKING CORPORATION ABN/ARBN Financial year ended: 33

Exhibit 1 ASX Release 6 November 2023 Appendix 4G and 2023 Corporate Governance Statement Westpac Banking Corporation (“Westpac”) today provides the attached Appendix 4G and Westpac Group 2023 Corporate Governance Statement.