Guarantor: Receipt of Shareholder Equity Injection

INSIDE INFORMATION

This announcement is made in accordance with Article 17 of the UK Market Abuse Regulation (EU) 596/2014 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018 ("UK MAR"). Upon publication of this announcement via a Regulatory Information Service, this information is considered to be in the public domain.

LEI: 213800JTFA6F3S7XX781

Northumbrian Water Finance Plc(the "Company")

NORTHUMBRIAN WATER ANNOUNCES RECEIPT OF £400M SHAREHOLDER EQUITY INJECTION

31 March 2026

The Company is pleased to announce that Northumbrian Water Group Limited ("NWGL"), being the immediate parent of Northumbrian Water Limited (being the guarantor of bonds issued by the Company) ("NWL"), has today received a £400 million equity injection from its shareholders and ordinary shares have been allotted to them pro rata to their current shareholdings. The funds have been received by NWL by an equity injection from NWGL of an equivalent amount.

Further information can be found on NWL's website at: Northumbrian Water Group confirms £400m shareholder equity investment

Matt Williams, Chief Financial Officer is the person responsible for arranging the release of this announcement.

ENDS

Notes:

For further information, please contact:

Media enquiries: [email protected]

Investor enquiries: Matt Williams, Chief Financial Officer, Alex Rutherford, Group Treasurer [email protected]

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