| 1 | HMT | Air Nova | Callsign: Hamilton, Ceased operations. | GB | AVCODES |
| 2 | HMT | Hemet Exploration | | F | AVCODES |
| 3 | HMT | Air Nova | | | ICAO1 |
| 4 | HMTA | HIGH MOUNTAIN TRANSPORT LLC | | | SCAC4 |
| 5 | HMTC | HAMMOND TRANSFER COMPANY INC | | | SCAC4 |
| 6 | HMTE | HOMETOWNE ENERGY | | | SCAC4 |
| 7 | HMTF | HOMETOWN EXPRESS FUEL CORP | | | SCAC4 |
| 8 | HMTG | HENNINGS, MATT TRUCKING | | | SCAC4 |
| 9 | HMTH | HARBOR MOTOR TRANS INC | | | SCAC4 |
| 10 | HMTI | HAZARDOUS MATERIAL TRANSPORTATION I | | | SCAC4 |
| 11 | HMTJ | H AND M TERMINAL TRANSPORT, INC | | | SCAC1 |
| 12 | HMTJ | HOT MIX TRANSPORTS INC | | | SCAC4 |
| 13 | HMTK | HARWELL, MARK TRUCKING LLC | | | SCAC4 |
| 14 | HMTL | HARMONY TRANSPORT LTD | | | SCAC4 |
| 15 | HMTM | HOMETOWN MOVING CO | | | SCAC4 |
| 16 | HMTP | H & M TRANSPORTATION | | | SCAC4 |
| 17 | HMTS | HOLMAN TRANSPORTATION SERVICES INC | | | SCAC4 |
| 18 | HMTT | HOMETOWN TRANSPORTATION INC | | | SCAC4 |
| 19 | HMTV | H & M TRANSFER | | | SCAC4 |
| 20 | HMTX | General American Transportation Corp. | 7/1937-1/1941 | | NAKINA |
| 21 | HMTX | Hyman Michaels Tank Line, Inc. (General American Tank Car Corp.) | 7/1935 | | NAKINA |
| 22 | HMTX | Hyman Michaels Tank Line, Inc. | 7/1930 | | NAKINA |
| 23 | HMTX | Hyman Michaels Tank Line, Inc. (Liquids Despatch Line, Inc.) | 7/1932 | | NAKINA |
| 24 | HMTX | Hyman Michaels Tank Line (General American Transportation Corp.) | Apr-38 | | NRHS |
| 25 | HMTX | GENERAL AMERICAN TRANSPORTATION CORP. [LIQUIDS DESPATCH LINE, INC.] (HYMAN MICHAELS TANK LINE, INC.) | | | PWRC |
