Publication of a Supplementary Prospectus

The following supplement 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 21 May 2026 to the following Base Prospectuses 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 and 9 April 2026; and
• Base Prospectus dated 3 July 2025 prepared in connection with the Nationwide Building Society €45,000,000,000 Global Covered Bond Programme unconditionally and irrevocably guaranteed as to payments by Nationwide Covered Bonds LLP, as previously supplemented on 11 August 2025, 20 November 2025, 16 December 2025 and 9 April 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 relevant Base Prospectus, as supplemented, may be addressed to and/or targeted at persons who are residents of particular countries (specified in the relevant 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 relevant Base Prospectus is not addressed. Prior to relying on the information contained in the relevant Base Prospectus, as supplemented, you must ascertain from the relevant Base Prospectus, as supplemented, whether or not you are part of the intended addressees of the information contained therein.

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