| 1 | HMJ | AS Ailes Limited d/b/a Harmony Jets | Callsign: Harmong Jets, | M | AVCODES |
| 2 | HMJ | Hässleholm - Markaryd Järnväg | 1897 - 1930 | S | svenska-lok.se |
| 3 | HMJG | HAYES, M & J TRUCKING INC | | | SCAC4 |
| 4 | HMJI | HAMILTON, M J INC | | | SCAC4 |
| 5 | HMJU | OASIS LEASING AND RENTAL PTE LTD | | SGP | BIC |
| 6 | HMJX | HELM Financial Corp. | added 7/1995; 7/2000-7/2005 | | NAKINA |
| 7 | HMJX | HM Joint Venture | eliminated 7/1995 | | NAKINA |
| 8 | HMJX | HELM Financial Corp. | eliminated 10/1994 | | NAKINA |
| 9 | HMJX | HM Joint Venture | added 7/1993; 1/1994 | | NAKINA |
| 10 | HMJX | HM Joint Venture | added 7/93; 1/94 | | NRHS |
| 11 | HMJX | HELM Financial Corp. | eliminated 10/94 | | NRHS |
| 12 | HMJX | HM Joint Venture | eliminated 7/95 | | NRHS |
| 13 | HMJX | HELM Financial Corp. | added 7/95; 7/2000 | | NRHS |
| 14 | HMJX | HELM EQUIPMENT LEASING CORPORATION (HELM FINANCIAL CORPORATION) | | | PWRC |
| 15 | HMJX | Helm Financial Corporation | | | RSRV |
| 16 | HMJX | HELM FINANCIAL CORPORATION | | | SCAC4 |
