| Spanish Space Agency (AEE) |
 Spain |
Government / agency |
2023 |
0 |
0 |
0 |
| SPAR Aerospace (SPAR) |
 Canada |
Commercial |
1967 |
0 |
0 |
0 |
| Spar Astro Aerospace, Carpinteria (AstroA) |
 United States |
Commercial |
1972 |
0 |
0 |
0 |
| Spectrum Astro (Spectrum Astro) |
United States |
Commercial |
1988 |
0 |
0 |
0 |
| SpeQtral (SpeQtral) |
 Singapore |
Commercial |
2017 |
0 |
0 |
0 |
| Sperry Utah Co. (SUCO) |
United States |
Commercial |
1960 |
0 |
0 |
0 |
| SpinLaunch (SpinLaunch) |
United States |
Commercial |
2014 |
0 |
0 |
0 |
| SRI (SRI) |
United States |
Commercial |
1970 |
0 |
0 |
0 |
| Sri Lanka Space Agency (SLSA) |
 Sri Lanka |
Government / agency |
|
0 |
0 |
0 |
| Sri Shakthi Institute of Engineering and Technology (SIET) |
 India |
Academic / research |
2006 |
0 |
0 |
0 |
| SS Battery 500 (SS 500) |
|
Government / agency |
1944 |
0 |
0 |
0 |
| St. Thomas More Cathedral School (STM School) |
United States |
Academic / research |
1944 |
0 |
0 |
0 |
| STADOKO UG (STADOKO UG) |
 Germany |
Commercial |
2012 |
0 |
0 |
0 |
| Stanford Electronics Laboratory (SEL) |
United States |
Commercial |
1958 |
0 |
0 |
0 |
| Star Catcher Industries, Inc. (Star Catcher) |
United States |
Commercial |
2024 |
0 |
0 |
0 |
| Stara Space (Stara Space) |
United States |
Commercial |
2018 |
0 |
0 |
0 |
| Starlink (Wuxi) Aerospace Tech Co. Ltd. (Xinglianti) |
 China |
Commercial |
2025 |
0 |
0 |
0 |
| StarRF (Xingkan Jiuzhou Tech Co Ltd) (StarRF) |
China |
Commercial |
2023 |
0 |
0 |
0 |
| Starstruck Inc. (Starstruck) |
United States |
Commercial |
1980 |
0 |
0 |
0 |
| State Administration of Cultural Heritage (Wenwu) |
China |
Government / agency |
2003 |
0 |
0 |
0 |
| State Aviation Plant No. 1 (GAZ-1) |
|
Commercial |
1941 |
0 |
0 |
0 |
| State Key Lab, China U. of Mining and Technology (CUMT) |
China |
Academic / research |
1909 |
0 |
0 |
0 |
| State Oceanographic Institute (GOI GMS) |
|
Government / agency |
1969 |
0 |
0 |
0 |
| State Organization for Technical Industries (SOTI) (SOTI) |
 Iraq |
Government / agency |
1974 |
0 |
0 |
0 |
| State Research Experimental Inst. of Aviation Medicine (GosNIIAM) |
|
Government / agency |
1935 |
0 |
0 |
0 |
| State University of Iowa (Iowa University) (SUI) |
United States |
Academic / research |
1847 |
0 |
0 |
0 |
| SteamJet Space Systems (SteamJet Space) |
 United Kingdom |
Commercial |
2020 |
0 |
0 |
0 |
| Stellar Exploration, Inc. (Stellar Exp.) |
United States |
Commercial |
|
0 |
0 |
0 |
| Stellat (Stellat) |
 France |
Commercial |
2001 |
0 |
0 |
0 |
| STENSAT (STENSAT) |
United States |
Academic / research |
1999 |
0 |
0 |
0 |
| StepLab (StepLab) |
 South Korea |
Commercial |
2021 |
0 |
0 |
0 |
| Sternula A/S (Sternula) |
 Denmark |
Commercial |
2019 |
0 |
0 |
0 |
| Stetman LLC (Stetman LLC) |
 Ukraine |
Commercial |
2023 |
0 |
0 |
0 |
| Stilsoft (Stilsoft) |
 Russia |
Commercial |
|
0 |
0 |
0 |
| Stockholm University (Stockholm) |
 Sweden |
Academic / research |
1878 |
0 |
0 |
0 |
| Stoke Space (Stoke) |
United States |
Commercial |
2020 |
0 |
0 |
1 |
| Strategic Forces Command, Nuclear Command Authority (India SFC) |
India |
Government / agency |
2003 |
0 |
0 |
0 |
| Stratolaunch Systems LLC (Stratolaunch) |
United States |
Commercial |
2011 |
0 |
0 |
0 |
| Submarine Command, Republic of Korea Navy (ROKN) |
South Korea |
Government / agency |
2015 |
0 |
0 |
0 |
| Sud Aviation (South Aviation) (Sud) |
France |
Commercial |
1957 |
0 |
0 |
0 |
| Sud Aviation, Ch. Courbevoie (SEREB) (Sud) |
France |
Commercial |
1957 |
0 |
0 |
0 |
| Supercomputing Tech Co Ltd. (Supercomputing) |
China |
Commercial |
2025 |
0 |
0 |
0 |
| SupremeSAT (Pvt) Ltd. (SupremeSat) |
Sri Lanka |
Commercial |
2012 |
0 |
0 |
0 |
| Surya University (Surya U.) |
India |
Academic / research |
2013 |
0 |
0 |
0 |
| Suzhou Skyscanner Space Tech Co Ltd. (Tianxun Kongjian) |
China |
Commercial |
|
0 |
0 |
0 |
| Swales Aerospace (SA) |
United States |
Commercial |
1978 |
0 |
0 |
0 |
| Swarm Technologies (Swarm Tech) |
United States |
Commercial |
2016 |
0 |
0 |
0 |
| Swedish Aeroplane Co. (SAAB) |
Sweden |
Commercial |
1937 |
0 |
0 |
0 |
