| 2003 | AGROCOM |
| 2003 | AGRUPACION PARTIDO DE LA GENTE |
| 2003 | AGS GRAPHIC PRINT S.R.L. |
| 2003 | AGUAS DE LA COSTA S.A. |
| 2003 | AIR LIQUIDE |
| 2003 | ALEARA FUNDALEA |
| 2003 | ALICIA CACHO Y VECINOS |
| 2003 | ALICO COMPANIA DE SEGUROS DE VIDA |
| 2003 | ALUAR CAMEA |
| 2003 | ALUSUD |
| 2003 | ALZAGO UNZUE Y CIA. S.A. |
| 2003 | AMADEUS ARG. |
| 2003 | AMC Networks International - Latin America |
| 2003 | AMERICA LATINA LOGISTICA |
| 2003 | AMERICA ONLINE |
| 2003 | AMERICAN AIRLINES |
| 2003 | AMPACET SOUTH AMERICA S. A |
| 2003 | ANDRES LAGOMARSINO E HIJOS S.A. |
| 2003 | ANEDRA |
| 2003 | ANMAT |
| 2003 | ANSES |
| 2003 | ARAUCA BIT AFJP |
| 2003 | ARCAN Engineering |
| 2003 | ARCHIBAIRES - ERCANADA |
| 2003 | ARCOR |
| 2003 | ARCOS DORADOS ARGENTINA S.A. |
| 2003 | ARGENCARD S.A. |
| 2003 | ARIEL DEL PLATA S.A. |
| 2003 | ARLA FOODS INGREDIENTES S.A. |
| 2003 | ARTEAR CANAL 13 S.A. |