Publication of Supplement

Nationwide Building Society

21 July 2026

RNS ANNOUNCEMENT

NATIONWIDE BUILDING SOCIETY

Legal Entity Identifier (LEI): 549300XFX12G42QIKN82

€45,000,000,000 GLOBAL COVERED BOND PROGRAMME

21 July 2026

Publication of Supplement

The following supplement dated 21 July 2026 (the Supplement) produced in connection with the €45,000,000,000 Global Covered Bond Programme (the Programme) established by Nationwide Building Society, has been approved by the Financial Conduct Authority and is available for viewing:

Supplement dated 21 July 2026, supplemental to the Prospectus dated 12 June 2026, in connection with the €45,000,000,000 Global Covered Bond 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/2668N_1-2026-7-21.pdf

A copy of the Supplement will also be 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:

Vikas Sidhu

Head of Investor Relations and Treasury Sustainability

Nationwide Building Society

Nationwide House

Pipers Way

Swindon SN38 1NW

United Kingdom

Telephone:            +44 (0) 7738 273 287

Email:                    Vikas.Sidhu@nationwide.co.uk

DISCLAIMER - INTENDED ADDRESSEES

Please note that the information contained in the Prospectus, as supplemented by the Supplement, may be addressed to and/or targeted at persons who are residents of particular countries (specified in the 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 Prospectus, as so supplemented, is not addressed. Prior to relying on the information contained in the Prospectus, as so supplemented, you must ascertain from the Prospectus, as so supplemented, whether or not you are part of the intended addressees of the information contained therein.

In particular, the Prospectus, as supplemented by the Supplement, does not constitute an offer of securities for sale in the United States. Neither the Prospectus nor the Supplement are for distribution in the United States. The securities described therein have not been, and will not be, registered under the U.S. Securities Act of 1933, as amended (the Securities Act), or under any relevant securities laws of any state of the United States of America and are subject to U.S. tax law requirements. Subject to certain exceptions, the securities may not be offered or sold within the United States or to, or for the account or benefit of, U.S. persons or to persons within the United States of America, as such terms are defined in Regulation S under the Securities Act. There will be no public offering of the securities in the United States.

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