Notice of Annual General Meeting ("AGM")

19 December 2017

Impax Asset Management Group plc

Notice of Annual General Meeting ("AGM")

The Directors of Impax Asset Management Group plc ("Impax" or the "Company") announce that copies of the Company's Annual Report and Accounts for the year ended 30 September 2017 including notice of the Company's AGM have been posted 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, 7th floor, 30 Panton Street, London SW1Y 4AJ at 11.00 am on 2 March 2018.

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LEI number: 213800AJDNW4S2B7E680

Enquiries:

Anne Gilding Tel: +44 (0)20 3912 3000 (switchboard)

Head of Brand & Communications Tel: +44 (0)20 3912 3126 (direct)

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

7th floor, 30 Panton Street

London SW1Y 4AJ

Email: a.gilding@impaxam.com

www.impaxam.com

Ian Simm Tel: +44 (0)20 3912 3000 (switchboard)

Chief Executive

Impax Asset Management Group plc

7th floor, 30 Panton Street

London SW1Y 4AJ

www.impaxam.com

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