| 1 | HLM | Heli Midwest de Mexico, S.A. de C.V. | Callsign: Helimidwest, | MEX | AVCODES |
| 2 | HLM | Heli Medwest De Mexico | | | ICAO1 |
| 3 | HLM | HOLCIM S.A. | | RO | VKM |
| 4 | HLMA | HILL MEAT COMPANY | | | SCAC4 |
| 5 | HLMC | HOLMES TRUCKING INC | | | SCAC4 |
| 6 | HLMI | HALE MARITIME INC | | | SCAC4 |
| 7 | HLMJ | HOLMAN MOVING SYSTEMS (NJ DIVISION) | | | SCAC4 |
| 8 | HLML | H & L MOTORS LTD | | | SCAC4 |
| 9 | HLMN | HOLMAN DISTRIBUTION CENTER OF OREGON, INC | | | SCAC1 |
| 10 | HLMO | HOLMAN MOVING SYSTEMS | | | SCAC4 |
| 11 | HLMU | LANFER TRANSPORTE GMBH & CO. KG | | D | BIC |
| 12 | HLMV | HALL, MEL TRANSPORT LIMITED | | | SCAC4 |
| 13 | HLMX | HELM Financial Corp. | added 10/1985; 1/1994-7/2005 | | NAKINA |
| 14 | HLMX | H.L. Mills | 7/1930-7/1965; eliminated 4/1966 | | NAKINA |
| 15 | HLMX | H.L. Mills | 4/38-7/65; eliminated 4/66 | | NRHS |
| 16 | HLMX | HELM Financial Corp. | 1/94-7/2000 | | NRHS |
| 17 | HLMX | *H.L. MILLS | | | PWRC |
| 18 | HLMX | +HELM FINANCIAL CORPORATION | | | PWRC |
| 19 | HLMX | Helm Financial Corporation | | | RSRV |
| 20 | HLMX | HELM FINANCIAL CORPORATION | | | SCAC4 |
