| SDG Investments GmbH | |
| SDG.17 Consulting GmbH | |
| SDMD Systemhaus Digitale Mediendesigner GmbH | Hamburg |
| SDMetrics | Rhineland-Palatinate |
| sdnord Systeme & Dienste GmbH | Mecklenburg-Vorpommern |
| sds - Bausoftware GmbH | Rhineland-Palatinate |
| SDS International Marketing GbR | Berlin |
| SDS Software-Entwicklung und Digitale Systeme GmbH | North Rhine-Westphalia |
| SDS Sprang Datensysteme | |
| SDT Украина | |
| sdt.net AG | |
| Sdui GmbH | |
| SDV Werbestudio GmbH & Co. KG | |
| SE Spezial-Electronic AG | Lower Saxony |
| SE-Computer | Baden-Württemberg |
| SEA'D | |
| SEAL Systems AG | Bavaria |
| Seal.Games | |
| Seamless Therapeutics GmbH | |
| SEAR GmbH | Mecklenburg-Vorpommern |
| Search Engine Marketing Boutique GmbH | Bavaria |
| SEARCHTEQ GmbH | |
| Searoutes | |
| SeaTable | |
| Seatti GmbH | |
| SEB Systemhouse AG | Bavaria |
| Sebastian Felling | North Rhine-Westphalia |
| Sebastian Fischer | North Rhine-Westphalia |
| Sebastian Gollasch Versicherungsmakler GmbH | |
| Sebastián Ramírez | |
| Secardeo GmbH | Bavaria |
| Secarna Pharmaceuticals GmbH & Co. KG | |
| Seccommerce GmbH | Hamburg |
| Secfix | |
| Secjur GmbH | |
| SECOMP Electronic Components GmbH | Baden-Württemberg |
| Secorvo Security Consulting GmbH | Baden-Württemberg |
| Secret Software | Schleswig-Holstein |
| Secrypt GmbH | Berlin |
| Sector-x informationssysteme gmbh | North Rhine-Westphalia |
| sector27 GmbH | North Rhine-Westphalia |
| secumás OHG | Hesse |
| secunet Security Networks AG | |
| Secupay AG | |
| Secure Voice Platform | |
| Securepoint GmbH | Lower Saxony |
| SecureSystem GmbH | |
| SecurityBridge Group | |
| SecurStar | Bavaria |
| SecurStar GmbH | Bavaria |