| 1 | SIM | Star Air Limited | | WAL | AVCODES |
| 2 | SIM | Star Air | | | ICAO1 |
| 3 | SIM | SOUTHERN ILLINOIS & MISSOURI BRIDGE LINE | | | PWRC |
| 4 | SIMA | SIMAUDIO LTD | | | SCAC4 |
| 5 | SIMC | SIMMONS, J EXPRESS INC | | | SCAC4 |
| 6 | SIMD | STRAND IMPORTS & DISTRIBUTORS INC | | | SCAC4 |
| 7 | SIMG | SIMS MFG CO INC | | | SCAC4 |
| 8 | SIMH | SIM LOGISTICS | | | SCAC4 |
| 9 | SIMI | SCHNEIDER INTERMODAL MARKETING INC | | | SCAC4 |
| 10 | SIMI | Simi Valley Transit | | US-CA | TRAFFIC |
| 11 | SIMK | SIMMONS TRUCKING COMPANY INC | | | SCAC4 |
| 12 | SIMN | SIMON TRANSPORT LLC | | | SCAC4 |
| 13 | SIMO | SIMONSON-OIEN TRUCKING INC | | | SCAC4 |
| 14 | SIMQ | SIM QUA RANCH LTD | | | SCAC4 |
| 15 | SIMS | SIMCOX GRINDING & STEEL CO | | | SCAC4 |
| 16 | SIMU | SHANGHAI SAFE-TRANSPORT CHEMICAL LOGISTICS CO.,LTD | | PRC | BIC |
| 17 | SIMU | SINOCHEM INTERTRANS CO LTD | | | SCAC4 |
| 18 | SIMV | SIM A & D TRUCKING | | | SCAC4 |
| 19 | SIMW | SIMKINS TRUCKING CO | | | SCAC4 |
| 20 | SIMX | Simms Oil Co. | 7/1930-7/1935 | | NAKINA |
| 21 | SIMX | Shippers Car Line Corp. | 7/1937 | | NAKINA |
| 22 | SIMX | North American Car Corp. | added 7/1964; 7/1965-4/1970; eliminated 7/1972 | | NAKINA |
| 23 | SIMX | Sierra Bag Co. | added 1/1983; eliminated 1/1989 | | NAKINA |
| 24 | SIMX | Sturgis Iron & Metal Co., Inc. | 7/2005 (not listed) | | NAKINA |
| 25 | SIMX | Ominsource Corp. | added 1/2009 | | NAKINA |
| 26 | SIMX | North American Car Corp. | added 7/64; 7/65-4/70 | | NRHS |
| 27 | SIMX | Sierra Bag Co. | added 1/83; eliminated 1/89 | | NRHS |
| 28 | SIMX | *SIMMS OIL CO. (SHIPPER' CAR LINE CORP.) | | | PWRC |
| 29 | SIMX | *NORTH AMERICAN CAR CORP. | | | PWRC |
| 30 | SIMX | *SIERRA BAG CO. | | | PWRC |
| 31 | SIMX | +STURGIS IRON & METAL CO., INC. | | | PWRC |
| 32 | SIMX | Sierra Bag | | | RSRV |
| 33 | SIMX | STURGIS IRON & METAL CO INC | | | SCAC4 |
| 34 | SIMZ | SIMPLOT | | | PWRC |
