| Name | Ticker | Type | ISIN code |
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| S
| S
| Stock | |
| SAFETY FIRST PRINCIPAL-PROTECTED TRUST C | AZP | Stock | |
| SAFETY FIRST US EUR | AKN | Stock | |
| SALISBURY BANCORP | SAL | Stock | |
| SALOMON SMITH BARNEY HOLDINGS INC | SPE@A | Bond | |
| SAMSON OIL | SSN | Stock | |
| SAN DIEGO 6 E 440 PF | SDO-C | Stock | |
| SAN DIEGO 6 E 450 PE | SDO-B | Stock | |
| SAN DIEGO 6 E 5 PFD | SDO-A | Stock | |
| SANDIEGO G & E PRF | SDO-H | Stock | |
| SANTA MONICA MEDIA CORPORATION | MEJ.U | Stock | |
| SANTA MONICA MEDIA CORPORATION | MEJ | Stock | |
| SANTA MONICA MED WTS | MEJ+ | Warrant | |
| SAPPHIRE INDUSTRIALS | FYR.U | Stock | |
| SAPPHIRE INDUSTRIALS | FYR | Stock | |
| SAPPHIRE INDUST WTS | FYR+ | Warrant | |
| SAS | SAS | Stock | |
| SAW | SAW | Stock | |
| SBL | SBL | Stock | |
| SBO | SBO | Stock | |
| SCJ | SCJ | Stock | |
| SCOLR PHARMA, INC | DDD | Stock | |
| SCZ | SCZ | Stock | |
| SEA | SEA | Stock | |
| SEABOARD CORP | SEB | Stock | |