In addition to the partner institution, there were a further 42 associate institutions in the EuroPlaNet project. 

The institutions are listed below.
  

AUSTRIA
University of Vienna / Institute of Astronomy

BELGIUM
Institute of Astrophysics and Geophysics

CROATIA
University of Spilt / Department of Physics

CZECH REPUBLIC
Academy of Sciences of the Czech Republic / Institute of Atmospheric Physics

DENMARK
University of Copenhagen / The Niels Bohr Institute
University of Aarhus / Mars Simulation Laboratory

FINLAND
University of Helsinki / Observatory
University of Oulu / Department of Physical Sciences

FRANCE
Observatoire des Sciences de l’Univers de Besançon

GERMANY
University of Stuttgart / Institute of Space System
Technical University at Brunswick / Institute for Theorical Physics
University of Köln
Johannes Gutenberg University of Mainz

GREECE
National Observatory of Athens
National and Kapodistrian University of Athens

ITALY
Università degli studi di Lecce

POLAND
University of Warsaw / Institute of Geophysics

RUSSIA
Institute of Applied Physics of the Russian Academy of Sciences
Moscow State University / Skobeltsyn Institute of Nuclear Physics

SPAIN
Center of Astrobiology / Instituto Nacional de Técnica Aeroespacial 
University of Alicante
Rey Juan Carlos University

SWEDEN
Stockholm Observatory

SWITZERLAND
University of Bern / Space research and Planetary Sciences

THE NETHERLANDS
Netherlands Institute for Space Research
Utrecht University
Delft University of Technology
Vrij University

UK
Armagh Observatory
University of Kent / Centre for Astrophysics and Planetary Sciences

USA
NASA / Goddard Space Flight Center
Johns Hopkins University - Applied Physics Laboratory
Jet Propulsion Laboratory
University of Colorado / Laboratory for Atmospheric and Space Physics
University of Arizona / Lunar & Planetary Laboratory
University of Michigan / Space Physics Research Laboratory (SPRL)
Space Science Institute 
Southwest Research Institute
University of Iowa
Lunar and Planetary Institute (Houston)
University of California, Berkeley