| 1 | PM | Tropic Air Limited | ICAO: TOS, Callsign: Tropiser, Designator PM recalled by IATA | BH | AVCODES |
| 2 | PM | Brymon Aviation Ltd. d/b/a Brymon Airways | ICAO: BRY, Callsign: Brymon, IATA designator changed to BC | GB | AVCODES |
| 3 | PM | POLUS Centre for Parachute and Expeditional Works | Designator PM* recalled by IATA | RUS | AVCODES |
| 4 | PM | Compania Internacional de Aviacion, S.A. (COPISA) | | PE | AVCODES |
| 5 | PM | Pamir Airways | ICAO: PIR, Callsign: Pamir, Ceased operations in 2011. | AFG | AVCODES |
| 6 | PM | Prescott Support Company | ICAO: PSK, Callsign: Support, | USA | AVCODES |
| 7 | PM | Canaryfly S.L. | ICAO: CNF, Callsign: Canary, | E | AVCODES |
| 8 | PM | Chesapeake and Ohio Ry. Co. | eliminated 10/1980 | | NAKINA |
| 9 | PM | Chesapeake and Ohio Ry. Co. (Pere Marquette Dist.) | 1/1975-1/1980 | | NAKINA |
| 10 | PM | Chesapeake and Ohio Ry. Co. | 10/1966 | | NAKINA |
| 11 | PM | Chesapeake and Ohio Ry. Co. | Oct-66 | | NRHS |
| 12 | PM | Chesapeake and Ohio Ry. Co. (Pere Marquette Dist.) | 1/75-1/80 | | NRHS |
| 13 | PM | Chesapeake and Ohio Ry. Co. | eliminated 10/80 | | NRHS |
| 14 | PM | CSX CORP. [CHESSIE SYSTEM; CHESAPEAKE & OHIO; PERE MARQUETTE RWY.] | | | PWRC |
| 15 | PM | Pere Marquette Railway (CSX Transportation) | | | RSRV |
| 16 | PM | Pere Marquette Railway | | USA | TRAFFIC |
| 17 | PM | KGHM Polska Miedz SA | | PL | VKM |
| 18 | PMA | Pan Malaysian Air Transport | Callsign: Pan Malaysia, | MAL | AVCODES |
| 19 | PMA | Pan Malaysian Air Transport | | | ICAO1 |
| 20 | PMAB | PRO MOTION LOGISTICS LLC | | | SCAC4 |
| 21 | PMAH | PHILLIPS MOVING AND STORAGE | | | SCAC4 |
| 22 | PMAI | PMA INC | | | SCAC3 |
| 23 | PMAK | PRICE, MATT TRUCKING | | | SCAC4 |
| 24 | PMAL | POTTSVILLE MOVING AND STORAGE COMPA | | | SCAC4 |
| 25 | PMAM | PELCHAT, MARC & FAVREAU, MARIE-CLAU | | | SCAC4 |
| 26 | PMAQ | PRECISE MESSENGER AND TRUCKING INC | | | SCAC4 |
| 27 | PMAR | PARE, MARC | | | SCAC4 |
| 28 | PMAS | PIONEER MOVING & STORAGE INC | | | SCAC3 |
| 29 | PMAT | P M A TRANSPORT INC | | | SCAC3 |
| 30 | PMAU | PETRO-TAINO TRANSPORT CORPORATION | | USA | BIC |
| 31 | PMAV | POLA MARITIME LTD | | | SCAC4 |
| 32 | PMAX | PMA Transportation Corp. | added 1/1979; 1/1980; eliminated 1/1994; 1/1994-7/2005 (not listed) | | NAKINA |
| 33 | PMAX | PMA Transportation Corp. | added 1/79; 1/80; eliminated 1/94; 7/2000 | | NRHS |
| 34 | PMAX | PMA TRANSPORTATION CORP. | | | PWRC |
| 35 | PMAX | PMA Transportation Corporation | | | RSRV |
| 36 | PMAX | PMA TRANSPORTATION CORP. | | | SCAC4 |
| 37 | PMBA | POSADA MORALES, BLANCA ROSARIO | | | SCAC4 |
| 38 | PMBAC | PAMBAC SA | | RO | VKM |
| 39 | PMBC | PEMBINA COOP | | | SCAC4 |
| 40 | PMBE | PETRA MARBLE & GRANITE INC | | | SCAC4 |
| 41 | PMBH | PLUMMER MOBILE HOME MOVING | | | SCAC3 |
| 42 | PMBJ | PETERSEN, M BJORN TRANSPORTATION | | | SCAC3 |
| 43 | PMBJ | PETERSEN, M BJORN TRANSPORTATION IN | | | SCAC4 |
| 44 | PMBN | PRODUITS MOBILICAB CANADA INC | | | SCAC4 |
| 45 | PMBQ | PRITCHETTS, MOE BBQ SAUCE | | | SCAC4 |
| 46 | PMBR | PEMBERTON TRUCK LINES INC | | | SCAC3 |
| 47 | PMBR | PEMBERTON TRUCK LINES INC | | | SCAC4 |
| 48 | PMBS | PEMBERTON TRANSPORT CO LTD | | | SCAC4 |
| 49 | PMBU | PBM GAS LTD | | | SCAC4 |
| 50 | PMBV | PT MERANTI BAHARI | | | SCAC4 |
| 51 | PMBW | PRISM - BERLIE (WINDSOR) LTD (DIV O | | | SCAC4 |
| 52 | PMBY | PRIORITY MOVING INC | | | SCAC4 |
| 53 | PMBZ | PUERTO RICO MARINE BEARTH | | | PWRC |
| 54 | PMC | Primac Courier, Inc. | Callsign: Primac, | USA | AVCODES |
| 55 | PMC | Primas Courier | | | ICAO1 |
| 56 | PMC | Philippine Marine Corps | | RP | TRAFFIC |
| 57 | PMCA | PILCHER MACHINERY COMPANY | | | SCAC3 |
| 58 | PMCB | PIPER MOTOR COMPANY INC | | | SCAC3 |
| 59 | PMCB | P & M LOGISTICS INC | | | SCAC4 |
| 60 | PMCC | PRIME CONTRACT CARRIER INCORPORATED | | | SCAC3 |
| 61 | PMCC | PORTLINE TRANSPORTES MARITIMOS INTE | | | SCAC4 |
| 62 | PMCD | P M C DISTRIBUTORS INC | | | SCAC3 |
| 63 | PMCD | PRAIRIE MUD & CHEMICAL SERVICE LTD | | | SCAC4 |
| 64 | PMCF | PLUM CREEK FARMS | | | SCAC4 |
| 65 | PMCG | P & M CARTAGE INC | | | SCAC3 |
| 66 | PMCH | PAPER MARKET CORP | | | SCAC4 |
| 67 | PMCJ | PACIFIC MULTIMODAL CORP | | | SCAC4 |
| 68 | PMCK&Y | PITTSBURGH, MCKEESPORT & YOUGHIOGHENY | | | PWRC |
| 69 | PMCKY | Pittsburgh, McKeesport & Youghiogheny | Real: PMCK&Y | USA | TRAFFIC |
| 70 | PMCL | PENETANG-MIDLAND COACH LINES LIMITE | | | SCAC3 |
| 71 | PMCL | PLAINS MIDSTREAM CANADA ULC | | | SCAC4 |
| 72 | PMCM | PM CARRIER SERVICES | | | SCAC3 |
| 73 | PMCN | P M C INC | | | SCAC3 |
| 74 | PMCO | P M C INDUSTRIES | | | SCAC3 |
| 75 | PMCO | PRIME CONTRACT CARRIER INCORPORATED | | | SCAC4 |
| 76 | PMCP | P & M CEDAR PRODUCTS INC | | | SCAC3 |
| 77 | PMCQ | P M C DISTRIBUTION CORPORATION | | | SCAC4 |
| 78 | PMCR | POLYMER MACHINERY CORPORATION | | | SCAC3 |
| 79 | PMCR | PUMPCRETE | | | SCAC4 |
| 80 | PMCS | PALMER MOTOR COACH SERVICE INC | | | SCAC3 |
| 81 | PMCS | P & M CARRIERS | | | SCAC4 |
| 82 | PMCT | PMC TRANSPORTATION COMPANY INC | | | SCAC4 |
| 83 | PMCU | PACIFIC MEXICO CONTAINER LINES, INC | | | SCAC3 |
| 84 | PMCU | PACIFIC MEXICO CONTAINER LINES INC | | | SCAC4 |
| 85 | PMCV | PACIFIC MULTIMODAL CORP | | | SCAC4 |
| 86 | PMCW | PYXIS MARITIME CORP | | | SCAC4 |
| 87 | PMCX | Plateau Mining Co. | added 7/1979; 1/1980; eliminated 4/1987; 1/1994 (not listed) | | NAKINA |
| 88 | PMCX | Peterson Manufacturing Co., Inc. | 1/1950-10/1957; eliminated 10/1959 | | NAKINA |
| 89 | PMCX | Paper Makers Chemical Corp., Ltd. | 7/1937-4/1938 | | NAKINA |
| 90 | PMCX | Paper Makers Chemical Corp. | 7/1930-7/1935 | | NAKINA |
| 91 | PMCX | Western Paper Makers Chemical Co. | 8/1920-7/1923 | | NAKINA |
| 92 | PMCX | Paper Makers Chemical Corp., Ltd. | Apr-38 | | NRHS |
| 93 | PMCX | Peterson Manufacturing Co., Inc. | 1/52-10/57; eliminated 10/59 | | NRHS |
| 94 | PMCX | Plateau Mining Co. | added 7/79; 1/80; eliminated 4/87; 1/94 | | NRHS |
| 95 | PMCX | *PAPER MAKERS CHEMICAL CORP., LTD. [WESTERN PAPER MAKERS CHEMICAL CO.] | | | PWRC |
| 96 | PMCX | *PETERSON MANUFACTURING CO., INC. | | | PWRC |
| 97 | PMCX | *PLATEAU MINING COMPANY | | | PWRC |
| 98 | PMCY | PANORAMA MANAGEMENT COMPANY LTD | | | SCAC3 |
| 99 | PMCY | PRIMCO LTD | | | SCAC4 |
| 100 | PMDA | PAMIDA INC | | | SCAC3 |
