Holding(s) in Company

Pennon Group PLC
20 March 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 12,049,324 Ordinary Shares of 1221/10p each
in the Company.


20 March 2006

www.pennon-group.co.uk

End transmission


                      This information is provided by RNS
            The company news service from the London Stock Exchange