Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 37

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 37
---
 our Designee in accordance with the Benchmark Replacement Conforming Changes.

“Relevant Governmental Body” means the Federal Reserve Board and/or the Federal Reserve Bank of New York, or a committee officially endorsed or convened by the Federal Reserve Board and/or the Federal Reserve Bank of New York or any successor thereto.

“Unadjusted Benchmark Replacement” means the Benchmark Replacement excluding the Benchmark Replacement Adjustment.

For purposes of the floating rate notes, “business day” means each Monday, Tuesday, Wednesday, Thursday and Friday that is not a day on which banking institutions in Sydney, Australia, New York, New York, or London, United Kingdom are authorized or obligated by law or executive order to close.

The interest rate and amount of interest to be paid on the floating rate notes for each floating rate interest period will be determined by the calculation agent. The Bank of New York Mellon is currently serving as our calculation agent; however, we may change the calculation agent at any time without notice, and The Bank of New York Mellon may resign as calculation agent at any time upon thirty days’ prior written notice to us. All determinations made by the calculation agent shall, in the absence of manifest error, be conclusive for all purposes and binding on us and the holders of the floating rate notes. So long as Compounded SOFR is required to be determined with respect to the floating rate notes, there will at all times be a calculation agent. In the event that any then acting calculation agent shall be unable or unwilling to act, or that such calculation agent shall fail duly to establish Compounded SOFR for any floating rate interest period, or we propose to remove such calculation agent, we shall appoint another calculation agent.

In no event shall the interest rate on the floating rate notes be higher than the maximum rate permitted by New York law, as the same may be modified by United States law of general application. Additionally, the interest rate on the floating rate notes will in no event be lower than zero.

All percentages resulting from any of the above calculations will be rounded, if necessary, to the nearest one hundred thousandth of a percentage point, with five one-millionths of a percentage point rounded upwards (e.g., 9.876545% (or .09876545) being rounded to 9.87655% (or .0987655)) and all dollar amounts used in or resulting from such calculations will be rounded to the nearest cent (with one-half cent being rounded upwards).

<div align='center'>S-20</div>

TABLE OF CONTENTS

####