Investor · London, United Kingdom
Ian R. Simm
Open Ian in the network graph →Filings
41
SEC Form D
Connections
102
co-filers
Capital
$2.5B
across filings
Active
Dec 2017
to Nov 2025
Most-connected co-filers (102)
Bruce R. Jenkyn-Jones · London, United Kingdom36 sharedCharles D. Ridge · London, United Kingdom30 sharedImpax Global Resource Optimization (GP) Ltd · London, United Kingdom23 sharedParent Company of General Partner David Impax Asset Management Group PLC · London, United Kingdom21 sharedVan Dean · SEYMOUR, CT9 sharedMichael Harron · Chicago, IL9 sharedMatt Gorin · New York, NY8 sharedStephen V. Campe · Sunnyvale, CA8 sharedParent of the General Partner Richard Impax Asset Management Group PLC · London, United Kingdom7 sharedJon M. Schlegel · Denver, CO6 sharedScott Raney · San Francisco, CA6 sharedImpax Green Markets (GP) Limited · London, United Kingdom6 sharedKaren R. Cockburn · London, United Kingdom6 sharedTerry Lierman · Baltimore, MD5 sharedEncore General Partners LLC · Bozeman, MT5 sharedSuzanne I. Clough · Baltimore, MD5 sharedJoseph R. Darnell · New York, NY5 sharedScott Murphy · London, United Kingdom5 sharedDonald V. Almeida · Baltimore, MD5 sharedMichael I. Greenebaum · Baltimore, MD5 sharedImpax Asset Management (AIFM) Ltd · London, United Kingdom5 sharedTodd Kesselman · New York, NY5 sharedEmir Sandhu · Chicago, IL5 sharedImpax Global Opportunities (GP) Ltd · London, United Kingdom5 shared
Recent filings (41)
Global Resource Optimization Fund, L.P.Nov 2025 · 4 co-filersImpax Global Opportunities Fund L.P.Sep 2025 · 17 co-filersImpax Global Opportunities Fund L.P.Feb 2025 · 17 co-filersGlobal Resource Optimization Fund, L.P.Nov 2024 · 6 co-filersImpax Global Opportunities Fund L.P.Feb 2024 · 17 co-filersGlobal Resource Optimization Fund, L.P.Nov 2023 · 4 co-filersSafu Sake CoSep 2023 · 2 co-filers$1.0MImpax Global Opportunities Fund L.P.Feb 2023 · 17 co-filersGlobal Resource Optimization Fund, L.P.Nov 2022 · 6 co-filersImpax Global Opportunities Fund L.P.Feb 2022 · 17 co-filersCytonus Therapeutics, Inc.Feb 2022 · 11 co-filers$1.0MGlobal Resource Optimization Fund, L.P.Nov 2021 · 6 co-filersSafu Sake CoMar 2021 · 2 co-filers$417KCytonus Therapeutics, Inc.Mar 2021 · 11 co-filers$5.0MGlobal Resource Optimization Fund, L.P.Nov 2020 · 6 co-filersGlobal Resource Optimization Fund, L.P.Dec 2019 · 6 co-filersGlobal Resource Optimization Fund, L.P.Dec 2018 · 6 co-filersNew Energy Investors III LPJun 2018 · 21 co-filers$11.0MNew Energy Investors III LPJun 2018 · 21 co-filers$11.0MGlobal Resource Optimization Fund, L.P.Dec 2017 · 6 co-filersImpax Global Resource Optimization Fund, L.P.Dec 2016 · 10 co-filersImpax Global Resource Optimization Fund, L.P.Nov 2015 · 10 co-filersWellDoc, Inc.Jul 2015 · 27 co-filers$1.5MImpax Fundamental Long-Term Opportunities in Water Fund, L.P.Jul 2015 · 13 co-filersWellDoc, Inc.Mar 2015 · 19 co-filers$6.0M
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Ian in the interactive graph →