| Avides Media AG | Lower Saxony |
| Avira Operations GmbH | Baden-Württemberg |
| AVK EDV-Systemtechnik GmbH | |
| AVM Computersysteme Vertriebs GmbH | Berlin |
| AVN Solution GmbH | Hesse |
| Avodaq AG | Hamburg |
| Avonis | Hamburg |
| Avow GmbH | |
| AVP & IT GmbH | |
| AVR-Assembler-Tutorial | Hesse |
| AVS GmbH | Bavaria |
| avus Services GmbH | Baden-Württemberg |
| Avydos | |
| AW Media | Hesse |
| AWA Network GmbH | |
| AwardSpace | Schleswig-Holstein |
| Awardspace.com | Schleswig-Holstein |
| Aware | |
| Aware Health GmbH | |
| Awebsis | Saxony |
| AWEK Protech GmbH | Mecklenburg-Vorpommern |
| Awescode GmbH | |
| Awesome Developers UG | Berlin |
| Awesome Prototype GmbH | |
| AWP Consult GmbH | |
| AWS Orgware GmbH | |
| AX Semantics GmbH | |
| Axantis AG | Baden-Württemberg |
| Axavia Software GmbH | Saarland |
| Axcorn GmbH | |
| Axel Springer AG | Berlin |
| Axel Springer Corporate Solutions GmbH & Co. KG | |
| Axel Springer Plug and Play Accelerator | |
| Axel Springer PLug and Play Accelerator GmbH | Berlin |
| Axel Springer Porsche GmbH & Co. KG | |
| Axentiv AG | Hesse |
| Axes Systems GmbH | North Rhine-Westphalia |
| Axinio GmbH | |
| Axinom | Bavaria |
| AXODO GmbH | Berlin |
| Axolabs | |
| aXon Gesellschaft für Informationssysteme mbH | North Rhine-Westphalia |
| AxoNet Software GmbH | |
| Axonic Informationssysteme GmbH | Baden-Württemberg |
| Axovision Capital GmbH | |
| aXoweb | |
| Axplora Group GmbH | |
| AXSOL GmbH | |
| Axxellerance GmbH | |
| Aysberg Web Development GmbH | Bavaria |