Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 32

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 32
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 and disclaimers, including that the Federal

<div align='center'>S-16</div>

TABLE OF CONTENTS

Reserve Bank of New York may alter the methods of calculation, publication schedule, rate revision practices or availability of SOFR at any time without notice.

Compounded SOFR

The interest rate on the floating rate notes for each floating rate interest period will be equal to Compounded SOFR (as defined herein) plus a margin of 82 basis points. “Compounded SOFR” will be determined by the calculation agent in accordance with the following formula:

where:

“d0,” for any Observation Period, is the number of U.S. Government Securities Business Days in the relevant Observation Period;

“i” is a series of whole numbers from one to d0, each representing the relevant U.S. Government Securities Business Day in chronological order from, and including, the first U.S. Government Securities Business Day in the relevant Observation Period;

“SOFRi,” for any U.S. Government Securities Business Day “i” in the relevant Observation Period, is equal to SOFR in respect of that day “i”;

“ni,” for any U.S. Government Securities Business Day “i” in the relevant Observation Period, is the number of calendar days from, and including, such U.S. Government Securities Business Day “i” to, but excluding, the following U.S. Government Securities Business Day (“i+1”); and

“d” is the number of calendar days in the relevant Observation Period.

For these calculations, the daily SOFR in effect on any U.S. Government Securities Business Day will be the applicable SOFR as reset on that date.

For purposes of determining Compounded SOFR, “SOFR” means, with respect to any U.S. Government Securities Business Day:

(1)

the Secured Overnight Financing Rate published for such U.S. Government Securities Business Day as such rate appears on the Federal Reserve Bank of New York’s Website at 3:00 p.m. (New York time) on the immediately following U.S. Government Securities Business Day (the “SOFR Determination Time”); or

(2)

if the rate specified in (1) above does not so appear, unless both a Benchmark Transition Event and its related Benchmark Replacement Date have occurred, the Secured Overnight Financing Rate as published in respect of the first preceding U.S. Government Securities Business Day for which the Secured Overnight Financing Rate was published on the Federal Reserve Bank of New York’s Website.