Publication of a Supplementary Prospectus

The following supplement to the Base Prospectus referred to below has been approved by the Financial Conduct Authority and is available for viewing:

Nationwide Building Society

Supplement dated 15 June 2026 to the following Base Prospectus previously published by Nationwide Building Society:

Base Prospectus dated 1 August 2025 prepared in connection with the Nationwide Building Society U.S.$35,000,000,000 European Note Programme, as previously supplemented on 20 November 2025, 16 December 2025, 9 April 2026 and 21 May 2026.

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

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

Please note that the information contained in the Base Prospectus, as supplemented, may be addressed to and/or targeted at persons who are residents of particular countries (specified in the Base Prospectus, as supplemented) 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 is not addressed. Prior to relying on the information contained in the Base Prospectus, as supplemented, you must ascertain from the Base Prospectus, as 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.