| 2020 | Ameport |
| 2020 | AMERICOLD |
| 2020 | AMIGOS DE GRANJA BUBY |
| 2020 | AMPARA |
| 2020 | ANCAL |
| 2020 | Anclaflex (RAPSA) |
| 2020 | ANDARIEGA SOLUCIONES HABITACIONALES S.A . |
| 2020 | ANDIF |
| 2020 | ANDREANI |
| 2020 | ANLIS - INSTITUTO MALBRAN |
| 2020 | ANMAT |
| 2020 | ANSAL REFRIGERACION |
| 2020 | ANSES |
| 2020 | ANTAE S.A. |
| 2020 | ANTARTIDA COMPAÑIA ARGENTINA DE SEGUROS S.A. |
| 2020 | AOT - ASOCIACION OBRERA TEXTIL DE LA REPUBLICA ARG |
| 2020 | APHOLOS METALURGICA |
| 2020 | API SALUD MENTAL |
| 2020 | APTAR B&H S.A. |
| 2020 | AQM |
| 2020 | ARBA - CHACABUCO |
| 2020 | ARBA AVELLANEDA |
| 2020 | ARBREX |
| 2020 | ARCOR |
| 2020 | ARENERA COLONIA |
| 2020 | ARGEN COBRAS S.A. |
| 2020 | ARGENTUM CONSULTING |
| 2020 | ARGUS DIAGNÓSTICO MEDICO |
| 2020 | ARREBEEF S.A. |
| 2020 | ARREDO |