- ACT Operations Research
- AGILEA S.A.S.
- AVL List GmbH
- Aalborg University [Denmark]
- Aalto University
- Aarhus University [Aarhus]
- Adventure Research [Warnsveld]
- Agenor-I
- Agenzia Lucana di Sviluppo e di Innovazione in Agricoltura
- Aghetera Sas
- Aix Marseille Université
- Ampère
- Ampère, Département Méthodes pour l'Ingénierie des Systèmes
- Arcelik A.S
- Argumentation, Décision, Raisonnement, Incertitude et Apprentissage
- Arts et Métiers Paristech ENSAM Aix-en-Provence
- Assystem France
- Aston University [Birmingham]
- Athens Technology Center S.A. [Athènes]
- Athens University of Economics and Business
- Attica Wealth Management
- Auburn University
- Axia Value Chain [São Paulo]
- Azad University, Science and Research Branch
- Azienda Sanitaria Locale [ROMA]
- Åbo Akademi University [Turku]