Total Voting Rights

Impax Asset Management Group plc ("Impax" or the "Company")

Total Voting Rights

In conformity with the FCA's Disclosure Guidance and Transparency Rules DTR 5.6.1, the Company notifies the market that as at the date of this announcement, the Company's issued share capital comprises 130,415,087 ordinary shares of 1 pence each. All of the shares have equal voting rights and there are no shares held in treasury.

This figure of 130,415,087 ordinary shares represents the total voting rights in the Company and may be used by shareholders as the denominator for the calculations by which they can determine if they are required to notify their interest in, or a change to their interest in, the Company under the Financial Conduct Authority's Disclosure Guidance and Transparency Rules.

LEI number: 213800AJDNW4S2B7E680

Enquiries:

Zack Wilson

Group General Counsel and Company Secretary Tel: +44 (0) 20 3912 3000 (switchboard)

Impax Asset Management Group plc

7th floor, 30 Panton Street

London SW1Y 4AJ Email: z.wilson@impaxam.com

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