| OKB-9 (V.F. Petrov) of Uralmashzavod (OKB-9) |
|
Government / agency |
1942 |
0 |
0 |
0 |
| OKBS-276 (N.D. Kuznetsov) (OKB-276) |
|
Commercial |
1946 |
0 |
0 |
0 |
| Oklahoma State University (OkSU) |
 United States |
Academic / research |
1890 |
0 |
0 |
0 |
| Old Dominion University (ODU) |
United States |
Academic / research |
1930 |
0 |
0 |
0 |
| Olin Aerospace (Olin) |
United States |
Commercial |
1985 |
0 |
0 |
0 |
| OmniEarth LLC (OmniEarth) |
United States |
Commercial |
2014 |
0 |
0 |
0 |
| OmniTeq (OmniTeq) |
United States |
Commercial |
2010 |
0 |
0 |
0 |
| Omsk Aviation Plant (Omsk Av. Zav.) |
|
Commercial |
1965 |
0 |
0 |
0 |
| OnB Space (OnB Space) |
 South Korea |
Commercial |
2025 |
0 |
0 |
0 |
| Ondas Media (Ondas) |
 Spain |
Commercial |
2008 |
0 |
0 |
0 |
| One Web (Florida) (One Web) |
United States |
Commercial |
2015 |
0 |
0 |
0 |
| One Zero One Middle School (Yi Ling Yi) |
 China |
Academic / research |
|
0 |
0 |
0 |
| OneTeam (OneTeam) |
 Japan |
Commercial |
2019 |
0 |
0 |
0 |
| OOO New Intellectual Systems (OOO NIS) |
 Russia |
Commercial |
2019 |
0 |
0 |
0 |
| OOO Stratonavtika (Stratonavtika) |
Russia |
Commercial |
2011 |
0 |
0 |
0 |
| Open Source Satellite Initiative (OSSI) |
South Korea |
Academic / research |
2011 |
0 |
0 |
0 |
| Open Space Network (OSN) |
United States |
Commercial |
2015 |
0 |
0 |
0 |
| Operation Period (Operation Period) |
United States |
Academic / research |
2015 |
0 |
0 |
0 |
| Orange S.A. (Orange S.A.) |
 France |
Commercial |
2013 |
0 |
0 |
0 |
| Orbex (Orbex) |
 United Kingdom |
Commercial |
2015 |
0 |
0 |
1 |
| Orbit Fab (Orbit Fab) |
United States |
Commercial |
2018 |
0 |
0 |
0 |
| OrbitAID Aerospace Pvt Ltd. (OrbitAID) |
 India |
Commercial |
2021 |
0 |
0 |
0 |
| Orbital Compute, Inc. (Orbital Compute) |
United States |
Commercial |
2026 |
0 |
0 |
0 |
| Orbital Effects (Orbital Effects) |
United States |
Commercial |
2019 |
0 |
0 |
0 |
| Orbital Paradigm (Orbital Paradigm) |
Spain |
Commercial |
2023 |
0 |
0 |
0 |
| Orbital Solutions Monaco (OSM) |
 Monaco |
Commercial |
2019 |
0 |
0 |
0 |
| Orbital Temple (Edson Pavoni) (Orbital Temple) |
 Brazil |
Academic / research |
2025 |
0 |
0 |
0 |
| Orbital Transport und Raketen AG, Garching factory (OTRAG) |
 Germany |
Commercial |
1980 |
0 |
0 |
0 |
| Orbital Transport und Raketen AG, Stuttgart factory (OTRAG) |
Germany |
Commercial |
1975 |
0 |
0 |
0 |
| Orbitec (Orbital Technologies Corporation) (Orbitec) |
United States |
Commercial |
1988 |
0 |
0 |
0 |
| Orbits Corp. (Orbits Corp) |
 Philippines |
Commercial |
|
0 |
0 |
0 |
| Orenburgskiy Mashinostroitelniy Zavod (Orenburg MZ) |
|
Commercial |
1961 |
0 |
0 |
0 |
| Oriental Spaceport (Shandong) Development Group Co., Ltd., (Dongfang Hangtian) |
China |
Commercial |
2020 |
0 |
0 |
0 |
| Oriental Starlink (Dongfang Xinglian) |
China |
Commercial |
|
0 |
0 |
0 |
| Orion Satellite Corp. (Orion) |
United States |
Commercial |
1982 |
0 |
0 |
0 |
| Orion Space (Orion Space) |
 Nepal |
Commercial |
2017 |
0 |
0 |
0 |
| Orion Space Solutions (Orion Space Sol.) |
United States |
Commercial |
2022 |
0 |
0 |
0 |
| Osaka Prefectural University (Osaka Pref. U.) |
Japan |
Academic / research |
1883 |
0 |
0 |
0 |
| Osaka University (Osaka) |
Japan |
Academic / research |
1931 |
0 |
0 |
0 |
| Oslo University (Oslo) |
 Norway |
Academic / research |
1811 |
0 |
0 |
0 |
| OverHorizon AB (OverHorizon) |
 Sweden |
Commercial |
2009 |
0 |
0 |
0 |
| Ovzon |
United States |
Commercial |
2006 |
0 |
0 |
0 |
| Oxford University (Oxford) |
United Kingdom |
Academic / research |
1096 |
0 |
0 |
0 |
| Pacific Scientific Energetic Materials Co. (PacSciEMC) |
United States |
Commercial |
1986 |
0 |
0 |
0 |
| Pacific Sierra Research Corp. (Pacific Sierra) |
United States |
Commercial |
|
0 |
0 |
0 |
| Pakistan Atomic Energy Commission (PAEC) |
 Pakistan |
Government / agency |
1955 |
0 |
0 |
0 |
| Pakistan National Engineering and Scientific Commission (NESCOM) |
Pakistan |
Government / agency |
2001 |
0 |
0 |
0 |
| PanAmSat (PANAM) |
United States |
Commercial |
1984 |
0 |
0 |
0 |
