| 2018 | ORGANIZACION TECHINT S.A DIVISION TELECOMUNICACIONES (TESUR) |
| 2018 | ORIGENES |
| 2018 | ORLOSH - ORL MEDIC S.A. |
| 2018 | Oscar Barbieri S.A. |
| 2018 | OSCAR BRUNO ADMINISTRACION DE CONSORCIOS |
| 2018 | OSCRAIA - SURYA |
| 2018 | OSDE - BINARIA SEGUROS |
| 2018 | OSDEPYM |
| 2018 | OSETYA - OBRA SOCIAL DE EMPLEADOS TEXTILES Y AFINES |
| 2018 | OSIAD SALUD |
| 2018 | OSMEDICA |
| 2018 | Osmotica Pharmaceutical |
| 2018 | OSPACA |
| 2018 | OSPIM - OBRA SOCIAL DEL PERSONAL DE LA INDUSTRIA MOLINERA |
| 2018 | OSPOCE |
| 2018 | OSPRERA |
| 2018 | OUTSOURCE SRL |
| 2018 | OXPANE |
| 2018 | OXY NET S.A. |
| 2018 | PABSA S.A - MAGNA ARGENTINA - PAC |
| 2018 | PAGINA 12 |
| 2018 | PAGO FACIL |
| 2018 | PALLARO HNOS. S.A. |
| 2018 | PAMATEX |
| 2018 | PAMI |
| 2018 | PAMI - ADROGUE |
| 2018 | PAMI - AGENCIA 7 |
| 2018 | PAMI - ARCHIVOS |
| 2018 | PAMI - CENTRO DE COMPUTOS |
| 2018 | PAMI - GRAND BOURG |