PO56 Nat.grid.n.a 36

25 November 2024

National Grid North America Inc.

Publication of Final Terms

The following final terms have been approved by the Financial Conduct Authority and are available for viewing:

Final Terms in relation to the National Grid North America Inc. issues of (i) EUR 600,000,000 3.247 per cent. Senior Instruments due 25 November 2029 and (ii) EUR 600,000,000 3.724 per cent. Senior Instruments due 25 November 2034, each under the National Grid North America Inc. Euro 8,000,000,000 Euro Medium Term Note Programme.

To view the full documents, please paste the following URLs into the address bar of your browser:

http://www.rns-pdf.londonstockexchange.com/rns/4080N_1-2024-11-22.pdf

http://www.rns-pdf.londonstockexchange.com/rns/4080N_2-2024-11-22.pdf

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

For further information, please contact:

DISCLAIMER - INTENDED ADDRESSEES

Please note that the information contained in each Final Terms may be addressed to and/or targeted at persons who are residents of particular countries (specified in the Base Prospectus for the National Grid North America Inc. Euro 8,000,000,000 Euro Medium Term Note Programme dated 23 August 2024) only and is not intended for use and should not be relied upon by any person outside these countries. Prior to relying on the information contained in each Final Terms you must ascertain from the 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.