Ian Simm is a control person of Impax Asset Management and directly owns under 5% of it. Ian Simm holds a First-class honours degree in Physics from Cambridge University and a Master's in Public Administration from Harvard University.
Impax Asset Management is an investment adviser based in London, United Kingdom, registered with the SEC since 2008. It provides investment management. Its clients include pooled investment vehicles, investment companies and other investment advisers. Its regulatory assets under management total $25.8 billion, as filed on 22 December 2025. Its fees, ownership and offices are on the firm’s profile.
Ian Simm is Founder and Chief Executive of Impax Asset Management Group plc, an investment manager focused on the transition to a more sustainable economy, with offices and clients in Europe, North America and the Asia-Pacific region. Outside Impax he is a member of the UK government's Net Zero Council and of the Trustee Body for the Cambridge University Endowment Fund. Before Impax he was an engagement manager at McKinsey & Company advising clients on environmental strategy.
- CRD
- 5298088
- Firm
- Impax Asset Management · CRD 143247
- Role
- Director, Chief Executive Officer
- In role since
- August 1998 · 28 years
- Control person
- Yes
- Direct ownership
- Under 5%
- Firm headquarters
- London, United Kingdom
- Individual registration
- No current adviser record · SEC search
- Disciplinary history
- Not yet shown here · SEC record
- Firm bio
- impaxam.com
Where does Ian Simm work?
Ian Simm has been Director, Chief Executive Officer of Impax Asset Management, LTD. since August 1998, and is a control person of the firm.
How can I verify Ian Simm’s record?
Ian Simm’s role is listed on Impax Asset Management, LTD.’s Form ADV, which the SEC’s adviser search (adviserinfo.sec.gov) publishes under the firm’s CRD 143247.



