| 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) |
| 2004 | SOLVAY QUIMICA S.A. |
| 2004 | SPP |
| 2004 | STANDARD CHARTERED BANK |
| 2004 | STBA |
| 2004 | STC SA |
| 2004 | SUBSECRETARIA DE DERECHOS HUMANOS |
| 2004 | Subsecretaria de puertos y vias navegables |
| 2004 | SUBSECRETARIA DE TURISMO DEL GOBIERNO DE LA CIUDAD |
| 2004 | SUBTERRANEOS DE BS. AS. |
| 2004 | SUENO ESTELAR |
| 2004 | SULLAIR ARGENTINA |
| 2004 | SUM MICRO SYSTEM |
| 2004 | SUPER EKI |
| 2004 | SVC SITEMAS DE VIDEO |
| 2004 | SVD |
| 2004 | SWAN TURISMO |
| 2004 | SWISS ADVISORY GROUP |