RNS Number : 6641M Pennon Group PLC 16 July 2026

Pennon Group plc - LEI: 213800V1CCTS41GWH423

South West Water Finance Plc - LEI: 213800OV68U446W4NV89

South West Water Limited - LEI: 213800FR2VAOKRYRHX45

EMTN Programme: Notification of admission to trading of transferable securities

The following transferable securities issued by South West Water Finance Plc (the "Issuer") and unconditionally and irrevocably guaranteed by South West Water Limited (the "Guarantor") have today been admitted to trading on the Main Market of the London Stock Exchange plc and admitted to the Official List of the Financial Conduct Authority:

(A) GBP £250,000,000 6.000 per cent. Fixed Rate Notes due July 2035 (ISIN: XS3433852269); and

(B) GBP £100,000,000 3.806 per cent. Index-Linked Rate Notes due July 2041 (ISIN: XS3441669275),

(together, the "Notes").

The Notes are issued pursuant to a base prospectus dated 21 August 2025 (as supplemented on 1 December 2025, 18 June 2026 and 8 July 2026) (the "Base Prospectus"). Full information on the Issuer, the Guarantor and the offer of the Notes is only available on the basis of the Base Prospectus.

The Base Prospectus has been published on the website of the London Stock Exchange plc through a regulatory information service and is also available to view here:

https://www.pennon-group.co.uk/investor-information/debt-investors

For further information, please contact Chris Tregenna, Group Treasurer, on 07733 312479.

DISCLAIMER - INTENDED ADDRESSEES

This announcement does not constitute or form part of an offer to sell or the solicitation of an offer to subscribe for or otherwise acquire any securities, including the Notes.

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

In particular, this announcement is not for distribution in the United States and the Notes 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 Notes in the United States.

Your right to access this service is conditional upon complying with the above requirement.

END

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