| Name | Type | Country |
|---|---|---|
| Planet Media | Enterprise | Spain |
| Plataforma Tecnológica Ferroviaria Española | Enterprise | Spain |
| POLSKI ZWIAZEK MOTOROWY | Enterprise | |
| Preston Solutions | Enterprise | UK |
| PROMOTION OF OPERATIONAL LINKS WITH INTEGRATED SERVICES, ASSOCIATION INTERNATIONALE | Association | |
| Prosegur | Enterprise | Spain |
| Provus | Enterprise | Turkey |
| Renfe Cercanías | Enterprise | Spain |
| Robotiker | Enterprise | Spain |
| Saitec | Enterprise | Spain |