| Loreg GmbH | Hamburg |
| LORENZ Archiv-Systeme GmbH | |
| LORENZ IT-Dienstleistungen Ltd. & Co. KG | Baden-Württemberg |
| Lorenz Life Sciences Group | |
| Lorenz Messtechnik GmbH | Baden-Württemberg |
| LORENZ Orga-Systeme GmbH | Hesse |
| Lorenz Software GmbH | Bavaria |
| Loresoft Software | Baden-Württemberg |
| Loric Ventures Administration GmbH | |
| LORIX GmbH | North Rhine-Westphalia |
| Lorop GmbH | Berlin |
| Lorth Gessler Mittelstaedt GmbH | Baden-Württemberg |
| Losan Pharma GmbH | |
| Losinno Software | Baden-Württemberg |
| LoSOFT Softwaretechnik | Bavaria |
| Lost & Found Software | |
| Lost Weekend | |
| Lothar Dittmer | Berlin |
| Loudly GmbH | |
| Louis Internet GmbH | North Rhine-Westphalia |
| Lounge 4Digitale Medien | Bavaria |
| Loventis Systems | Bavaria |
| Löwenstark Online-Marketing GmbH | Lower Saxony |
| Löwi e.K. | |
| LOX24 | Berlin |
| Loxonet GmbH | |
| Loy und Hutz AG | Baden-Württemberg |
| Loyal Team GmbH | Berlin |
| LPKF Laser & Electronics AG | Lower Saxony |
| LR IT-Systeme GbR | Thuringia |
| LRE Medical | |
| LRE Medical | |
| LS telcom AG | Baden-Württemberg |
| LSE Space GmbH | |
| LSI-Electronic GmbH | Bavaria |
| LSP Lindemann Schwennicke & Partner Partnerschaft von Rechtsanwälten mbB | |
| LST Consulting | |
| LT-Electronics | |
| Lubis EDA | |
| Luca | |
| LucaNet AG | |
| Lucanus Roboter GmbH | Berlin |
| LucasFonts GmbH | Berlin |
| Luchs Security | Lower Saxony |
| Lucht Probst Associates GmbH | |
| Lucid Genomics GmbH | |
| Lucid Studio Berlin | |
| Lucius & Baer GmbH | Bavaria |
| LuckaSoft | North Rhine-Westphalia |
| LückerServices e.K. | North Rhine-Westphalia |