Directors dealing

28 November 2014

Impax Asset Management Group plc

Director's Dealing

Further to the 2014 Employee Share Option Plan announced by Impax Asset Management Group plc (the "Company") yesterday, the Company provides notification pursuant to Rule 17 of the AIM Rules that it has today approved the grant of options over 100,000 of the Company's ordinary shares to Ian Simm, the Chief Executive of the Company.

The options will vest, subject to continued employment, on 31 December 2017, and have an exercise price set at 110% of the average of the closing mid-market price of the Company's shares for each of the 30 consecutive business days following the announcement of the Company's results for the year ended 30 September 2014.

- ENDS -

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: a.gilding@impaxam.com

www.impaxam.com

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