| Auto Fleet Control GmbH | |
| Autoactiva Werbeagentur GmbH | |
| Autodesk GmbH | Bavaria |
| Automaited | |
| Automat Berlin GmbH | |
| Automaten Hofmann GmbH | Hesse |
| Automaten Technik Baumann GmbH | Bavaria |
| Automation + Productivity AG | Baden-Württemberg |
| Automation Dr. Nix GmbH & Co. KG | North Rhine-Westphalia |
| Automation Technology GmbH | |
| Automation Uhr GmbH | Thuringia |
| Automation W+R GmbH | Bavaria |
| Automation24 GmbH | |
| Automedia GmbH | |
| Autometer Meß- und Automatisierungstechnik GmbH | North Rhine-Westphalia |
| Automotive Hosting Partner GmbH | North Rhine-Westphalia |
| Automotive Security Research Group | |
| Autonomo GmbH | |
| autoRetouch | |
| Autosar | Bavaria |
| autronic electronic-service GmbH | Baden-Württemberg |
| AUVESY GmbH | |
| Auvista | Bavaria |
| Auxmoney GmbH | |
| Auxolar GmbH | |
| AV Digital Media GmbH | |
| AV-TEST GmbH | Saxony-Anhalt |
| AVACOMM Systems GmbH | Bavaria |
| Avala Capital | |
| Avalia GmbH & Co. KG | |
| Avanit GmbH | Bavaria |
| Avantgarde Business Solutions GmbH | North Rhine-Westphalia |
| Avantgarde Gesellschaft für Kommunikation mbH | |
| Avantgarde Labs GmbH | Saxony |
| Avantgarde Labs GmbH | |
| Avanti GmbH | |
| AVARI | Berlin |
| Avario Business Solutions GmbH | |
| Avaris | North Rhine-Westphalia |
| AVAT Automation GmbH | Baden-Württemberg |
| avateramedical GmbH | |
| Avelios Medical GmbH | |
| AvenDATA | Berlin |
| Avenga International GmbH | |
| Avenit AG | Baden-Württemberg |
| Aventosoft GmbH | Bavaria |
| Averbis GmbH | |
| Averest | Rhineland-Palatinate |
| Avernis | Baden-Württemberg |
| Avi Medical Operations GmbH | |