| Country | Collaborating Institution | Institution Code | Contact |
| AU | Griffith University | AU-GRI | Nathan Garland |
| AU | James Cook University | AU-JCU | Greg Boyle |
| CA | SNOLAB | CA-SNOLAB | Szymon Manecki |
| CA | TRIUMF | CA-TRIUMF | Chloe Malbrunot |
| CH | University of Bern | CH-UBE | Michele Weber |
| CH | University of Zurich | CH-UZH | Laura Baudis |
| CN | Institute of High Energy Physics, Chinese Academy of Sciences | CN-IHEP | Yi Wang |
| CZ | Institute of Physics of the Czech Academy of Sciences | CZ-FZU | Jaroslav Zalesak |
| DE | Humboldt University Berlin | DE-HUB | Heiko Lacker |
| DE | Johannes Gutenberg University Mainz | DE-JGU | Uwe Oberlack |
| DE | Johannes Gutenberg University Mainz PRISMA | DE-PRISMA | Michael Wurm |
| DE | Technical University of Munich | DE-TUM | Hans Steiger |
| DE | University of Freiburg | DE-UFR | Marc Schumann |
| DE | Heidelberg University | DE-UHE | Peter Fischer |
| DE | Institut fuer Kernphysik – Universitaet Muenster | DE-UMU | Christian Weinheimer |
| ES | CIEMAT | ES-CIEMAT | Clara Cuesta |
| ES | IFIC (Valencia) | ES-IFIC | Justo Martín-Albo |
| ES | Universidad Complutense Madrid | ES-UCM | Luis Mario Fraile |
| ES | University of Granada | ES-UGR | Patricia Sanchez-Lucas |
| ES | Universidade de Santiago de Compostela / IGFAE | ES-USC | Diego Gonzalez Diaz |
| ES | University of Zaragoza | ES-UZA | Maria Luisa Sarsa |
| FR | Astroparticle and Cosmology Laboratory | FR-APC | Davide Franco |
| FR | Centre for particle physics of Marseille | FR-CPPM | Jose Busto |
| FR | IJCLab (CNRS/IN2P3 + Université Paris-Saclay) | FR-IJC | Anatael Cabrera |
| FR | Laboratoire Leprince-Ringuet (CNRS/IN2P3 + Ecole Polytechnique) | FR-LLR | Margherita Buizza Avanzini |
| FR | Laboratoire de Physique Nucléaire et des Hautes Énergies | FR-LPNHE | Luca Scotto Lavina |
| FR | Laboratoire de Physique Subatomique et de Cosmologie | FR-LPSC | Silvia Scorza |
| FR | Mines Paris | FR-PSL | Paolo Stringari |
| IL | Tel Aviv University | IL-TAU | Adi Ashkenazi |
| IL | Weizmann Institute of Science | IL-WIS | Amos Breskin |
| IT | University of L'Aquila | IT-AQ | Carla Macolino |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Bologna | IT-BO | Marco Selvi |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Cagliari | IT-CA | Matteo Cadeddu |
| IT | Fondazione Bruno Kessler | IT-FBK | Alberto Gola |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Ferrara | IT-FE | Luca Tomassetti |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Genova | IT-GE | Gemma Testera |
| IT | Gran Sasso Science Institute | IT-GSSI | Paolo Agnes |
| IT | Istituto Nazionale di Fisica Nucleare – Laboratori Nazionali del Gran Sasso | IT-LNGS | Matthias Laubenstein |
| IT | Istituto Nazionale di Fisica Nucleare – Laboratori Nazionali di Legnaro | IT-LNL | Oscar Azzolini |
| IT | Istituto Nazionale di Fisica Nucleare – Laboratori Nazionali del Sud | IT-LNS | Luciano Pandola |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Milano | IT-MI | Andrea Zani |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Milano-Bicocca | IT-MIB | Carla Maria Cattadori |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Napoli | IT-NA | Giuliana Fiorillo |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Padova | IT-PD | Stefano Dusini |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Roma | IT-RM1 | Marco Rescigno |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Roma Tre | IT-RM3 | Giuseppe Salamanna |
| IT | Istituto Nazionale di Fisica Nucleare – Sezione di Torino | IT-TO | Manuel Rolo |
| IT | University of Naples Federico II | IT-UNINA | Giuliana Fiorillo |
| NL | Nikhef | NL-NIKHEF | Tina Pollman |
| PL | Astrocent, NCAC PAS | PL-CAMK | Marcin Kuźniak |
| PL | Jagiellonian University | PL-UJ | Grzegorz Zuzel |
| PT | LIP Coimbra | PT-LIP | Vitaly Chepel |
| PT | University of Coimbra | PT-UC | Cristina Bernardes Monteiro |
| RO | University of Bucharest (UoB) | RO-UOB | Ionel Lazanu |
| UK | Imperial College London | UK-ICL | Stefan Soldner Rembold |
| UK | King's College London | UK-KCL | Jim Dobson |
| UK | University of Liverpool | UK-LIV | Kostas Mavrokoridis |
| UK | University of Manchester | UK-MAN | Roxanne Guenette |
| UK | Open University | UK-OU | Jesper Skottfelt |
| UK | University of Oxford | UK-OX | Jocelyn Monroe |
| UK | UKRI STFC | UK-STFC | Paul Scovell |
| UK | University of Sussex | UK-SUS | Jeff Hartnell |
| UK | University College London | UK-UCL | Ruben Saakyan |
| UK | University of Edinburgh | UK-UED | Andrzej Michal Szelc |
| US | Brookhaven National Laboratory | US-BNL | Guang Yang |
| US | Boston University | US-BU | Christopher Grant |
| US | Colorado State University | US-CSU | Michael Mooney |
| US | California State University – East Bay | US-CSUEB | Arran Philips |
| US | Fermilab | US-FNAL | Flavio Cavanna |
| US | University of Hawaii | US-HAW | Jelena Maricic |
| US | Lawrence Berkeley National Laboratory | US-LBL | Dan Dwyer |
| US | Lawrence Livermore National Laboratory | US-LLNL | Samuele Sangiorgio |
| US | Louisiana State University | US-LSU | Thomas Kutter |
| US | Massachusetts Institute of Technology | US-MIT | Brooke Russell |
| US | Princeton University | US-PU | Cristiano Galbiati |
| US | Stony Brook | US-SBU | Wei Shi |
| US | SLAC National Accelerator Laboratory | US-SLAC | Yun-Tse Tsai |
| US | UC Berkeley | US-UCB | Gabriel Orebi Gann |
| US | UC Davis | US-UCD | Robert Svoboda |
| US | UC Riverside | US-UCR | Shawn Scott Westerdale |
| US | University of Massachusetts, Amherst | US-UMASS | Andrea Pocar |
| US | University of Pennsylvania | US-UPENN | Josh Klein |
| US | University Texas Arlington | US-UTA | Jonathan Asaadi |
| US | Virginia Polytechnic Institute and State University | US-VT | Camillo Mariani |
| US | Wellesley College | US-WC | James Battat |
