Holding(s) in Company

Pennon Group PLC
05 June 2006


PENNON GROUP PLC

FOR IMMEDIATE RELEASE

HOLDING IN COMPANY


Pennon Group Plc has received notification (by fax today) that Ameriprise
Financial, Inc holds an interest in 13,109,942 Ordinary Shares of 122 1/10p each
in the Company.


5 June 2006

www.pennon-group.co.uk

End transmission


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