Notice of AGM

5 December 2014

Impax Asset Management Group plc ('Impax' or the 'Company')

Notice of Annual General Meeting ("AGM")

The Directors of Impax announce that copies of the Company's Annual Report and Accounts for the year ended 30 September 2014 including notice of the Company's AGM have been posted today to shareholders.

An electronic copy of the Annual Report and Accounts, Circular and Notice of AGM is available on the Company's website www.impaxam.com.

The Company's AGM will be held at the Company's offices, Norfolk House, 31 St James's Square, London, SW1Y 4JR at 11.00am on 4 February 2015.

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Enquiries:

Ian Simm Tel: + 44 (0) 20 7434 1122 (switchboard)

Chief Executive

Impax Asset Management Group plc

Norfolk House, 31 St James's Square,

London, SW1Y 4JR

www.impaxam.com

Anne Gilding Tel: +44 (0) 20 7434 1122 (switchboard)

Head of Brand Communications Tel: +44 (0) 20 7432 2602 (direct)

Impax Asset Management Group plc Tel: +44 (0) 7881 249612 (mobile)

Norfolk House, 31 St James's Square,

London, SW1Y 4JR Email: [email protected]

www.impaxam.com

Guy Wiehahn Tel: +44 (0) 20 7418 8893Nominated Adviser and BrokerPeel Hunt LLP