| prototype.berlin GmbH | Berlin |
| Protron Mikrotechnik GmbH | Bremen |
| proux UG (haftungsbeschränkt) | Hamburg |
| Provadis School of InternationalManagement and Technology AG | Hesse |
| provantis IT Solutions GmbH | Baden-Württemberg |
| ProVeg Incubator | |
| Proven Technologies GmbH | |
| Provendis Software | Saxony-Anhalt |
| PROVERTHA Connectors, Cables & Solutions GmbH | Baden-Württemberg |
| PROVIREX Genome Editing Therapies GmbH | |
| Provisio GmbH | North Rhine-Westphalia |
| Provitro AG | |
| ProWare Solutions GmbH | Bavaria |
| ProWebMa GmbH & Co. KG | North Rhine-Westphalia |
| proWIN Winter GmbH | |
| PROWIS Automatisierung GmbH | Mecklenburg-Vorpommern |
| Proxation GmbH | Bavaria |
| ProXima | Baden-Württemberg |
| Proxima Fusion GmbH | |
| Prozeda GmbH | Bavaria |
| Prozeßsteuerung & Systementwicklung GmbH | Thuringia |
| Prudsys AG | Saxony |
| PS Consulting GmbH | Baden-Württemberg |
| PS hard- & software GmbH | Bavaria |
| PS IT Consulting GmbH | North Rhine-Westphalia |
| PS IT-Service GmbH | |
| PSB Presse Service Bonn GmbH & Co. KG | North Rhine-Westphalia |
| PSE Elektronik GmbH | Bavaria |
| PSG Fertigungs- und Prozessautomations GmbH | Bavaria |
| PSI Automotive & Industry GmbH | Berlin |
| PSI Energy Markets GmbH | Lower Saxony |
| PSI Logistics GmbH | Berlin |
| PSI Metals GmbH | North Rhine-Westphalia |
| PSI Software AG | Berlin |
| PSP Systemhaus GmbH | Thuringia |
| PSplus GmbH | Hesse |
| PST Professional Support Technologies GmbH | North Rhine-Westphalia |
| PSW Group GmbH & Co. KG | |
| Psycho3D | Berlin |
| PSZ Electronic GmbH | Bavaria |
| PT1 Fund Management GmbH | |
| PTC Telecom GmbH | Bavaria |
| PTec Datentechnik GmbH & Co. KG | North Rhine-Westphalia |
| PTS – Institut für Fasern & Papier gGmbH | |
| PTSoft | |
| PTV Group | Baden-Württemberg |
| Public Cloud Group GmbH | |
| Public Cloud Group Holding GmbH | |
| Public Projects | Lower Saxony |
| Public-Soft GmbH | Bavaria |