| Short Name | Organisation legal full name | Country |
| CNAM | Conservatoire national des arts et métiers | France |
| Aalto | Aalto-korkeakoulusäätiö sr | Finland |
| CMI | Cesky Metrologicky Institut | Czechia |
| CSIC | Agencia Estatal Consejo Superior de Investigaciones Cientificas | Spain |
| DFM | Dansk Fundamental Metrologi A/S | Denmark |
| PTB | Physikalisch-Technische Bundesanstalt | Germany |
| RISE | RISE Research Institutes of Sweden AB | Sweden |
| TUBITAK | Turkiye Bilimsel ve Teknolojik Arastirma Kurumu | Türkiye |
| DTU | Danmarks Tekniske Universitet | Denmark |
| Inria | Institut national de recherche en sciences et technologies du numérique | France |
| KU Leuven | Katholieke Universiteit Leuven | Belgium |
| UA | Universidad de Alicante | Spain |
| UJM | Université Jean Monnet Saint-Etienne | France |
| UNIZAR | Universidad de Zaragoza | Spain |
| BASF | BASF Coatings GmbH | Germany |
| CI | Callaghan Innovation | New Zealand |
| HOLO3 | Holo3 | France |
| METAS | Eidgenössisches Institut für Metrologie METAS | Switzerland |
| Rhopoint | Rhopoint Instruments Limited | United Kingdom |