| 2004 | SECRETARIA DE EDUCACION DEL GOB.CDAD. |
| 2004 | SECRETARIA ELECTORAL |
| 2004 | SEDRONAR |
| 2004 | SEGURIDAD INTERCONTINENTAL |
| 2004 | SENASA |
| 2004 | SENDECO SA |
| 2004 | SENOR TANGO |
| 2004 | SENSOR MATIC ARG. S.A. |
| 2004 | SERH CONSULTORES S.A |
| 2004 | SERVICE BUREAU INTETEL |
| 2004 | SERVICIO GEOLOGICO MINERO ARGENTINO (SEGEMAR) |
| 2004 | SERVICIOS DE VIAJES Y TURISMO BIBLOS S.A. |
| 2004 | SERVICIOS MEDICOS ARGENTINA |
| 2004 | SERVICOR |
| 2004 | SGS ARGENTINA S.A. |
| 2004 | SHILTON WEYENS |
| 2004 | SHOPPING DE ALTO PALERMO |
| 2004 | SIBA UTE OBRADOR QUILMES |
| 2004 | SIBA UTE OBRADOR TURDERA |
| 2004 | SIEMENS |
| 2004 | SIF |
| 2004 | SIQAT |
| 2004 | SIREX |
| 2004 | SIRO ARMELIN S.A. |
| 2004 | SITEC BAIRES |
| 2004 | SITECA S.R.L. |
| 2004 | SKAL |
| 2004 | SODERIA FISHETI |
| 2004 | SOIMET |
| 2004 | SOLIS CANO (EX AUTOPISTAS GEA 8) |