Publication of Annual Report and Accounts 2023

PENNON GROUP PLC (THE "COMPANY")

PUBLICATION OF ANNUAL REPORT AND ACCOUNTS 2023 & NOTICE OF MEETING 2023

The Company's Annual Report and Accounts for the year ended 31 March 2023 (the "Annual Report") and Notice of Annual General Meeting 2023 (the "Notice of Meeting") have been published on the Company's website are available to view at www.pennon-group.co.uk/investor-information/shareholder-services/general-meetings. A hard copy version of the Annual Report and Notice of Meeting will be sent to those shareholders who have elected to receive paper communications.

In compliance with Listing Rule 9.6.1 (R) and 9.6.3 (R) the following documents have been submitted to the National Storage Mechanism and will shortly be available for inspection at https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

· Annual Report

· Notice of Meeting 2023

· Proxy Form for the 2023 Annual General Meeting ("AGM")

· Notice of Availability 2023

The Company will hold its AGM at The Courtyard, Sandy Park, Sandy Park Way, Exeter, EX2 7NN at 11:00am on Thursday 20 July 2023. Further information regarding attendance and voting at the AGM is set out in the Notice of Meeting.

In accordance with the FCA's Disclosure Guidance and Transparency Rules 6.3.5R (1A), the information required to be communicated in unedited full text was included in the Full Year Results 2022/2023 announcement released on 1 June 2023 and in the Annual Report, which will shortly be available for inspection at the NSM.

Andrew Garard

Group General Counsel & Company Secretary

19 June 2023