| 1 | SMP | Sempati Air Transport P.T. | Callsign: Sempati, Ceased operations 1998 | RI | AVCODES |
| 2 | SMP | Simplejet LV Ltd | Callsign: Simple Jet, | LV | AVCODES |
| 3 | SMP | Prima Aviation S.r.l. | Callsign: Prima Aviation, | RSM | AVCODES |
| 4 | SMPA | S & M PARKINSON TRUCKING | | | SCAC4 |
| 5 | SMPC | SOUTHERN MANITOBA POTATO COMPANY LT | | | SCAC4 |
| 6 | SMPD | SMOKEY POINT DISTRIBUTING, INC. | | | SCAC1 |
| 7 | SMPJ | SIMPLOT, J R CO | | | SCAC4 |
| 8 | SMPK | SIMPSON TRANSPORTATION INC | | | SCAC4 |
| 9 | SMPL | SAMPLE TRANSPORTATION LTD | | | SCAC4 |
| 10 | SMPM | SMART POINT LOGISTICS LTD | | | SCAC4 |
| 11 | SMPN | SOUTHERN METAL PROCESSING | | | SCAC4 |
| 12 | SMPO | STANDARD MOTOR PRODUCTS DE MEXICO | | | SCAC4 |
| 13 | SMPS | SIMPSON, J A ENTERPRISES | | | SCAC4 |
| 14 | SMPU | SCS MULTIPORT B.V. | | NL | BIC |
| 15 | SMPX | Smiley Petroleum Co., Inc. | 8/1920 | | NAKINA |
| 16 | SMPX | Shell-Mex Oil Co. of Cuba, Ltd. | 7/1937-4/1947 | | NAKINA |
| 17 | SMPX | Commercial Metals Co. | added 1/1997; added 4/1997; 7/2000-7/2005 | | NAKINA |
| 18 | SMPX | Shell-Mex Oil Co. of Cuba, Ltd. (Cia Petrolera Shell--Mex de Cuba, S.A.) | Apr-38 | | NRHS |
| 19 | SMPX | Commercial Metals Co. | added 1/97; added 4/97; 7/2000 | | NRHS |
| 20 | SMPX | *SMILEY PETROLEUM CO., INC. | | | PWRC |
| 21 | SMPX | *SHELL-MEX OIL CO. OF CUBA, LTD. | | | PWRC |
| 22 | SMPX | *STONE MOUNTAIN PARK | | | PWRC |
| 23 | SMPX | +COMMERCIAL METALS COMPANY | | | PWRC |
| 24 | SMPX | Commercial Metals | | | RSRV |
| 25 | SMPX | COMMERC | | | SCAC4 |
