| ALDI International Services GmbH & Co. oHG | — | — | Mülheim an der Ruhr | Germany |
| ALDI Bad Salzdetfurth | — | — | Bad Salzdetfurth | Germany |
| ALDI GmbH & Co. KG | — | — | Salzgitter | Germany |
| ALDI Immobilienverwaltung GmbH & Co. KG | — | — | Herten | Germany |
| ALDI Nord | — | — | Herten | Germany |
| ALDI SE & Co. KG | — | — | Paderborn | Germany |
| ALDI SE & Co. KG - Gütersloh | — | — | Gütersloh | Germany |
| ALDI SE & Co. KG - Hann. Münden | — | — | Hann. Münden | Germany |
| ALDI SE & Co. KG - Sievershausen | — | — | Lehrte | Germany |
| ALTEX Textil-Recycling GmbH & Co. KG | — | — | — | Germany |
| ALTMANN Ingenieurbüro GmbH & Co. KG | — | +49 9971 2003110 | Cham | Germany |
| AM Consulting | — | — | Eppendorf | Germany |
| AMAZONE | — | — | Bramsche | Germany |
| AMAZONE Technologie GmbH & Co. KG | — | — | Bramsche | Germany |
| AMBA operations GmbH | — | — | München | Germany |
| AMS-Stefan Maxeiner | — | — | Frankfurt am Main | Germany |
| AOL Deutschland Medien GmbH | — | +49 7032 652966 | Hamburg | Germany |
| APD Schlauchtechnik GmbH | — | — | Viersen | |
| APV Kränzle Photovoltaik GbR | — | — | Reistingen | Germany |
| ARGE projekt GmbH | — | — | Husum | Germany |
| ARTUR SUMM GMBH & CO. KG | — | +49 7721 84270 | Villingen-Schwenningen | Germany |
| AS+P | — | — | Frankfurt am Main | Germany |
| ASG Engineering | — | — | Köthen | Germany |
| ASML | — | — | Veldhoven | |
| ATEEL | — | — | Biwer | Luxembourg |