| ROCKOTT Business Solutions | North Rhine-Westphalia |
| Roclub GmbH | |
| Roda Computer GmbH | Baden-Württemberg |
| RODIAS GmbH | |
| Rödl & Partner GmbH Wirtschaftsprüfungsgesellschaft | Bavaria |
| Rogator AG | Bavaria |
| Röhrich und Partner Organisationsberatung GmbH | North Rhine-Westphalia |
| rokoli UG (haftungsbeschränkt) | Mecklenburg-Vorpommern |
| Rola Security Solutions GmbH | North Rhine-Westphalia |
| Roland Berger GmbH | |
| Roland Electronic GmbH | Baden-Württemberg |
| Roland Urban | Berlin |
| Rolladen Planet | |
| Romantis GmbH | |
| Rombus GmbH | |
| Römermann Rechtsanwälte AG | |
| Rommelag SE & Co. KG | |
| roNet GmbH | Bavaria |
| Room AG | |
| Root Global GmbH | |
| RootCamp GmbH | |
| Roover GmbH | |
| ROQ Technology GmbH | |
| Roq.ad | Berlin |
| Rösberg Engineering GmbH | Baden-Württemberg |
| Rösch | |
| Rosch Computer GmbH | Rhineland-Palatinate |
| Rose Computer GmbH | North Rhine-Westphalia |
| Rosebrock Software | Rhineland-Palatinate |
| Rosella Digital Marketing Agency | |
| Rosenkranz Elektronik GmbH | Hesse |
| Rosewitz-Christ-Informatik GbR | Bavaria |
| RoSolution software-engineering and communication GmbH | Bavaria |
| ROTA Verpackungstechnik GmbH & Co. KG | |
| Roth Elektronik GmbH | Hamburg |
| Roth-und-Freunde | North Rhine-Westphalia |
| Rothbaum Consulting Engineers GmbH | |
| Rotonda Business Angels e.V. | North Rhine-Westphalia |
| ROTOP Pharmaka GmbH | |
| Round Solutions GmbH & Co. KG | Hesse |
| Route4design | |
| ROWA-Soft GmbH | North Rhine-Westphalia |
| Rows GmbH | |
| ROXALL Medizin GmbH | |
| RP Digital GmbH | North Rhine-Westphalia |
| RpunktDESIGN Werbeagentur GmbH | Lower Saxony |
| Rs Computer | Lower Saxony |
| RS Gesellschaft für Informationstechnik mbH & Co. KG | North Rhine-Westphalia |
| RS Point | Saxony-Anhalt |
| RS Software & Systems GmbH | Baden-Württemberg |