| MATRA Space (MATRA) |
 France |
Commercial |
1968 |
0 |
0 |
0 |
| Mauritius Research and Innovation Council (MRIC) |
 Mauritius |
Government / agency |
2019 |
0 |
0 |
0 |
| Maverick Space Systems (Maverick) |
 United States |
Commercial |
2019 |
0 |
0 |
0 |
| Max Planck Geschellschaft (MPG) |
 Germany |
Academic / research |
1948 |
0 |
0 |
0 |
| Max Planck Institut fur Astronomie (MPIH) |
Germany |
Academic / research |
|
0 |
0 |
0 |
| Max Planck Institut fur Sonnensystemforschung (MPI-S) |
Germany |
Academic / research |
2004 |
0 |
0 |
0 |
| Max Valier Amateur Astronomers, South Tyrol (Amat. Max Valier) |
 Italy |
Academic / research |
2012 |
0 |
0 |
0 |
| Max-Planck-Institut fur Kernphysik (MPIK) |
Germany |
Academic / research |
1958 |
0 |
0 |
0 |
| Maxar (DigitalGlobe) (Maxar DG) |
United States |
Commercial |
2017 |
0 |
0 |
0 |
| Maxar Technologies (Maxar) |
United States |
Commercial |
2017 |
0 |
0 |
0 |
| MBB (MBB) |
Germany |
Commercial |
1968 |
0 |
0 |
0 |
| MBB (Munchen, Junkers plant) (MBB Munchen) |
Germany |
Commercial |
1969 |
0 |
0 |
0 |
| McDonnell Aircraft Corporation (McDonnell) |
United States |
Commercial |
1939 |
0 |
0 |
0 |
| MCI (MCI) |
United States |
Commercial |
2003 |
0 |
0 |
0 |
| MCI Communications Corp. (MCI) |
United States |
Commercial |
1963 |
0 |
0 |
0 |
| MCI WorldCom (MCI) |
United States |
Commercial |
1998 |
0 |
0 |
0 |
| McMaster University (McMaster U) |
 Canada |
Academic / research |
1887 |
0 |
0 |
0 |
| MDA (MDA) |
Canada |
Commercial |
2020 |
0 |
0 |
0 |
| MDA Space (MDA) |
Canada |
Commercial |
2020 |
0 |
0 |
0 |
| Medgar Evers College, City University of New York (CUNY) |
United States |
Academic / research |
1970 |
0 |
0 |
0 |
| MEI Technologies (MEI Tech) |
United States |
Commercial |
2005 |
0 |
0 |
0 |
| Meisei Electric Co. Ltd (Meisei Electric) |
 Japan |
Commercial |
1938 |
0 |
0 |
0 |
| Memorial University of Newfoundland (MU Newfoundland) |
Canada |
Academic / research |
1925 |
0 |
0 |
0 |
| Meridian Space (Meridian Space) |
United States |
Commercial |
2026 |
0 |
0 |
0 |
| Merritt Island High School (Merritt I HS) |
United States |
Academic / research |
|
0 |
0 |
0 |
| MESH Consortium (MATRA, ERNO, SAAB, HSD) (MESH) |
France |
Commercial |
1966 |
0 |
0 |
0 |
| Met Service of the DDR (MetD) |
|
Government / agency |
1950 |
0 |
0 |
0 |
| Meteo-France (FrMeteo) |
France |
Government / agency |
1993 |
0 |
0 |
0 |
| Meteorologie Nationale, France (MeteoNat) |
France |
Government / agency |
1945 |
0 |
0 |
0 |
| Mexican Satellite System (MEXSAT) |
 Mexico |
Government / agency |
|
0 |
0 |
0 |
| Mexican Space Agency (AEM) |
Mexico |
Government / agency |
2010 |
0 |
0 |
0 |
| Mexico Secretariat of National Defense (SEDENA) |
Mexico |
Government / agency |
1934 |
0 |
0 |
0 |
| MHI Aerospace Systems, Komaki Minami Plant (MHI Komaki) |
Japan |
Commercial |
|
0 |
0 |
0 |
| MHI Aerospace Systems, Tobishima Plant (MHI Tobishima) |
Japan |
Commercial |
|
0 |
0 |
0 |
| Michigan Technological University Aerospace Enterprise (MTU AE) |
United States |
Academic / research |
|
0 |
0 |
0 |
| Micro Orbiter Inc. (Micro Orbiter) |
Japan |
Commercial |
2021 |
0 |
0 |
0 |
| Micro-Space Inc. (Microspace) |
United States |
Commercial |
1998 |
0 |
0 |
0 |
| Microcosm (Microcosm Inc.) |
United States |
Commercial |
1984 |
0 |
0 |
0 |
| MicroCraft Inc (MicroCraft) |
United States |
Commercial |
2011 |
0 |
0 |
0 |
| MicroSat Lt (IAI/Rafael) (MicroSat Ltd) |
 Israel |
Commercial |
2009 |
0 |
0 |
0 |
| Microsat Systems Canada Inc. (MSCI) |
Canada |
Commercial |
1975 |
0 |
0 |
0 |
| Miinistry of Armaments 7th Directorate (MV 4U) |
|
Government / agency |
1954 |
0 |
0 |
0 |
| Mikoyan i Gurevich OKB-155 (MiG) |
|
Commercial |
1939 |
0 |
0 |
0 |
| Miles Space (Miles Space) |
United States |
Commercial |
2020 |
0 |
0 |
0 |
| Military Communication Works No. 1 (Wojskowe Z.L.) |
 Poland |
Government / agency |
|
0 |
0 |
0 |
| Military Industrial Commission, Iraq (Iraq MIC) |
 Iraq |
Government / agency |
1987 |
0 |
0 |
0 |
| Military Intelligence, Czech Republic (VZ CR) |
 Czechia |
Government / agency |
1919 |
0 |
0 |
0 |
| Millenium Engeering and Integration Services, LLC (Millenium EI) |
United States |
Commercial |
1995 |
0 |
0 |
0 |
