Publication of Supplement.

Publication of Supplement

The following supplement to the Registration Document dated 21 June 2024 and to the Base Prospectuses referred to below has been approved by the Financial Conduct Authority and is available for viewing:

Nationwide Building Society*

Supplement dated 29 May 2025 to the (i) Registration Document dated 21 June 2024, as previously supplemented on 11 December 2024, (ii) Base Prospectus dated 1 August 2024 prepared in connection with the U.S.$25,000,000,000 European Note Programme, as previously supplemented on 11 December 2024, (iii) Base Prospectus dated 21 June 2024 prepared in connection with the €45,000,000,000 Global Covered Bond Programme, as previously supplemented on 11 December 2024 and (iv) Base Prospectus dated 21 June 2024 prepared in connection with the U.S.$25,000,000,000 Senior Preferred, Senior Non-Preferred and Subordinated Medium-Term Note Programme, each established by Nationwide Building Society.

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

Supplement dated 29 May 2025 in respect of the Registration Document, the U.S.$25,000,000,000 European Note Programme, the €45,000,000,000 Global Covered Bond Programme and the U.S.$25,000,000,000 Senior Preferred, Senior Non-Preferred and Subordinated Medium-Term Note Programme

http://www.rns-pdf.londonstockexchange.com/rns/6605K_1-2025-5-29.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

Vikas Sidhu

Head of Investor Relations & Treasury Sustainability

Telephone: +44 (0) 7738 273287

Email: Vikas.Sidhu@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 Registration Document and the relevant Base Prospectus (as supplemented) may be addressed to and/or targeted at persons who are residents of particular countries (specified in the Registration Document or the relevant 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 relevant Base Prospectus is not addressed. Prior to relying on the information contained in the Registration Document and/or the relevant Base Prospectus you must ascertain from the Registration Document and the relevant Base Prospectus 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.