The 22 laboratories participating in the 2023/24 PEP Program, were as follows:
- AnLab Ltd., Czech Republic
- CEMIB - Multidisciplinary Center for Biological Investigation on Laboratory Animal Science, Brazil
- Central Institute for Experimental Animals, (CIEA), Japan
- Cerberus Sciences, Australia
- Charles River Laboratories (RADS), USA
- Charles River Laboratories Franc
- Envigo RMS SEL, Italy
- IDEXX BioAnalytics, Missouri, USA
- IDEXX Bioresearch, Ludwigsburg, Germany
- Laboratório de Controle Genético e Sanitário Animal, São Paulo, Brazil
- Microbiological Diagnostics, Germany
- Microbiological Monitoring Lab., Laboratory Animal Resource Center, KRIBB, Korea
- National Laboratory Animal Center (NLAC-MU), Mahidol University, Thailand
- Optipharm, Inc., Korea
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, Korea
- QM Diagnostics, Netherlands
- SAHMRI- ComPath, Australia
- Servicio de Controle da Qualidade Animal Rio de Janeiro, Brazil
- The Jackson Laboratory, Japan
- The Jackson Laboratory, USA
- VRL Maryland, LLC, USA
- XpressBio, Maryland, USA