AUM update

Impax Asset Management Group plc - Q2 2017 AUM update

London, 10 April 2017 - Impax Asset Management Group plc ("Impax" or the "Company"), the AIM quoted investment manager focused on environmental markets and related resource efficiency sectors, today provides an update of the development of its assets under discretionary and advisory management ("AUM") in the second quarter of its financial year.

On 31 March 2017 AUM reached a new peak of £5,711 million, representing an increase of 13% over the quarter and 27% increase on year end.

Ian Simm, Chief Executive, commented:

"We are seeing sustained interest from investors in many countries who are looking to access superior expected returns. With the Company's assets under management exceeding £5 billion, we continue to scale existing products across both listed equities and real assets, while also considering the development of our product range in response to client interest."

The table below sets out further details of the movements in the Company's AUM for the quarter ended 31 March 2017.

1exits completed from second private equity fund

Enquiries:

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

Chief Executive

Impax Asset Management Group plc

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)

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

Guy Wiehahn or Rishi Shah Tel: +44 (0) 20 7418 8900Nominated AdviserPeel Hunt LLP

Notes to Editors - About Impax Asset Management

Impax Asset Management is a leading investment firm, managing or advising on approximately £5.7bn1 primarily for institutional clients through both listed and private equity strategies.

The Company's investments are based on the strong conviction that population dynamics, resource scarcity, inadequate infrastructure and environmental constraints will profoundly shape global markets, creating investment risks and opportunities. Impax expects that these trends, reflecting the transition towards a more sustainable global economy, will drive earnings growth for well-positioned companies. Impax's proprietary investment framework identifies and calibrates the rising risks and expanding opportunities from this transition, and guides the search for investments that will deliver long term outperformance.

1As of 31 March 2017

Issued in the UK by Impax Asset Management Group plc, whose shares are quoted on AIM. Impax Asset Management Group plc is registered in England & Wales, number 03262305. AUM relates to Impax Asset Management Limited and Impax Asset Management (AIFM) Limited. Both companies are authorised and regulated by the Financial Conduct Authority and are wholly owned subsidiaries of Impax Asset Management Group plc. Please note that the information provided and links from it should not be relied upon for investment purposes. For further information please visit www.impaxam.com.