Notice of Results

Impax Asset Management Group plc

Date of Interim Results Announcement

Impax Asset Management Group plc today announces that it expects to announce its interim results for the six month period ended 31 March 2018 on Thursday 7th June 2018.

The Company will host an analysts' meeting and conference call at 9am on 7 June 2018, details to be confirmed.

LEI number: 213800AJDNW4S2B7E680

Enquiries:

Ian Simm

Chief Executive Tel: +44 (0) 20 3912 3000 (switchboard)

Impax Asset Management Group plc

7th floor, 30 Panton Street

London SW1Y 4AJ

www.impaxam.com

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

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

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