Publication of Annual Report

1 December 2017

Impax Asset Management Group plc (the "Company")

Publication of Annual Report and Accounts

Further to the announcement of the Company results on 29 November 2017 for the year ended 30 September 2017, a copy of the annual report and accounts is now available on the Company's website and will be posted to shareholders in due course.

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LEI number: 213800AJDNW4S2B7E680Enquiries:

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

Chief Executive

Impax Asset Management Group plcwww.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)

www.impaxam.com Email: a.gilding@impaxam.com

Guy Wiehahn Tel: +44 (0) 20 7418 8893Nominated AdviserPeel Hunt LLP