Pennon Group PLC

Pre-Annual General Meeting Information • Jun 26, 2025

Pennon Group plc

Peninsula House Rydon Lane Exeter Devon, England EX2 7HR

www.pennon-group.co.uk

26th June 2025

Dear Shareholder

Annual Report and Accounts 2025 (the 'Annual Report 2025') and Annual General Meeting (the 'AGM')

I am pleased to notify you that the Company's Annual Report 2025 has been published and can be viewed on our website at www.pennon-group.co.uk/investorinformation/reportsandpresentations.

In addition, the Notice of Meeting for our Annual General Meeting (the 'AGM Notice') has also been published and can be viewed on our website at www.pennon-group.co.uk/investor-information/shareholder-services.

Annual General Meeting 2025

The AGM will take place on Thursday 24th July 2025 at Peninsula House, Rydon Lane, Exeter, EX2 7HR at 10.00am. Further details about registration of attendance, safety and security arrangements, asking questions and voting at the meeting can be found in the AGM Notice.

Yours sincerely,

Andrew Garard Group General Counsel and Company Secretary Pennon Group plc

Registered Office: Peninsula House, Rydon Lane, Exeter EX2 7HR Registered in England No. 2366640 www.pennon-group.co.uk