Date of Interim Results Announcement

16 April 2015

Impax Asset Management Group plc

Date of Interim Results Announcement

Impax Asset Management Group plc today announces that it intends to release its interim results for the six month period ended 31 March 2015 on Tuesday 19 May 2015.

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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 8900Nominated Adviser and BrokerPeel Hunt LLP