LONDON–(BUSINESS WIRE)– As Agent Bank, please be advised of the following rate determined on: 9/21/2026 Issue ¦ Westpac Banking Corporation – Series 2025-C2 GBP 1,250,000,000 FRN due September 2030 ISIN Number ¦ XS3200096777 ISIN Reference ¦ XS3231291009 Issue Nomin GBP ¦ 1250000000 Period ¦ 6/26/2026 to 9/28/2026 Payment Date 9/28/2026 Number of Days ¦ 94 Rate ¦ 4.3482 Denomination GBP ¦ 1000 ¦ 1250000000 ¦ Amount Payable per Denomination ¦ 11.2 ¦ 13997630.14 ¦ B