PENNON GROUP PLC                                

9 December 2025

Pennon Group CEO Transition Arrangements

Further to the announcement on 11 July 2025 regarding Susan Davy's retirement from the Board of Pennon Group and as Chief Executive Officer, the Board confirms that Susan will step down from the Board on the 31 December 2025.

To support an orderly succession, the Board has approved interim arrangements covering the period between Susan stepping down from the Board and Keith Haslett joining the Board, following his notice period, which will be no later than 30 June 2026.

From 1 January 2026, David Sproul, Chair of Pennon Group, will assume the role of Executive Chair, supported by an Operating Committee with delegated executive authority to run the business and continue delivery of the Group's strategy.

The Operating Committee comprises:

·    Laura Flowerdew, Group Chief Financial Officer

·    Sarah Heald, Group Chief Strategy, Regulatory Affairs & Investor Relations Officer

·    Andrew Garard, Group General Counsel and Company Secretary

During this period, Susan will remain available to provide handover support to ensure a smooth transition and continuity until Keith's arrival.

Susan Davy said "My brilliant colleagues are firmly focused on delivery of our five-year plan, having made a robust start to the regulatory period. Our half year results confirm we are on track financially and operationally, delivering for customers, communities and the environment. I will continue to be available to support the team during this transition ahead of Keith's arrival."

David Sproul said "I would like to reiterate the Board's thanks to Susan for her unwavering leadership. We announced Keith's appointment in September, our succession planning enables a smooth and orderly transition, ahead of him joining Pennon Group as CEO following his notice period. With the support of the Board and the Operating Committee, I will ensure that Pennon Group continues on a business-as-usual basis."