In this brief video, produced in partnership with CityWire, Impax Founder and CEO Ian Simm discusses the firm’s focus on investing in the opportunities arising from the transition to a more sustainable economy, and how changing the name of the Pax World Funds to Impax Funds confirms that our investment philosophy is central to the objective of all Impax products globally.


Investments involve risk, including potential loss of principal.

The investment techniques and decisions of the investment adviser and the Fund’s portfolio manager(s), including the investment adviser’s assessment of a company’s ESG (Environmental, Social and Governance) profile when selecting investments for the Fund, may not produce the desired results and may adversely impact the Fund’s performance, including relative to other Funds that do not consider ESG factors or come to different conclusions regarding such factors.

Ian Simm

Founder & CEO

Ian Simm is the Founder and Chief Executive of Impax Asset Management Group plc, one of the world’s leading investment managers dedicated to investing in the transition to a more sustainable economy. Prior to Impax, Ian was an engagement manager at McKinsey & Company advising clients on environmental strategy.

Outside Impax, Ian is a member of the UK government’s Net Zero Innovation Board, which provides strategic oversight of public sector funding of energy innovation programmes, and is a board member of the Institutional Investors Group on Climate Change, the European membership body for investor collaboration on addressing climate change. He is also a commissioner with the Energy Transitions Commission, a global coalition of leaders developing transition roadmaps to achieve net-zero emissions. Between 2013 and 2018, he was a board member of the Natural Environment Research Council (NERC), the UK’s leading funding agency for environmental science. He supports charities in the clean energy, healthcare and a range of scientific and environmental sectors. 

Ian has a first-class honours degree in physics from Cambridge University and a Master’s in Public Administration from Harvard University. In the last century he initiated and led an expedition to complete the first summer crossing of the Sahara Desert by tandem bicycle.

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