Publication of Supplement

The following supplement to the base prospectus has been approved by the Financial Conduct Authority and is available for viewing:

Nationwide Building Society*

Supplement dated 8 December 2023 to the Base Prospectus dated 26 June 2023, prepared in connection with the U.S.$25,000,000,000 Senior Preferred, Senior Non-Preferred and Subordinated Medium-Term Notes Programme established by Nationwide Building Society.

To view the full document, please paste the following URL into the address bar of your browser:

http://www.rns-pdf.londonstockexchange.com/rns/2319W_1-2023-12-8.pdf

A copy of the above document has also been submitted to the National Storage Mechanism and will shortly be available for inspection at: https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

For further information, please contact:

Nationwide Building Society

Sarah Abercrombie

Head of Investor Relations, Credit Ratings and Treasury Sustainability

Telephone: +44 (0) 7587 886500

Email: Sarah.Abercrombie@nationwide.co.uk

Nationwide Building Society

Nationwide House

Pipers Way

Swindon SN38 1NW

* LEI: 549300XFX12G42QIKN82

DISCLAIMER - INTENDED ADDRESSEES

UK MiFIR professionals/ECPs only/No UK PRIIPs KID

EU MiFID II professionals/ECPs only/No EEA PRIIPs KID

Please note that the information contained in the Base Prospectus, as supplemented by the Supplement, may be addressed to and/or targeted at persons who are residents of particular countries (specified in the Base Prospectus) only and is not intended for use and should not be relied upon by any person outside these countries and/or to whom the offer contained in the Base Prospectus, as so supplemented, is not addressed. Prior to relying on the information contained in the Base Prospectus, as so supplemented, you must ascertain from the Base Prospectus, as so supplemented, whether or not you are part of the intended addressees of the information contained therein.

Your right to access this service is conditional upon complying with the above requirement.