The AMC fleet was originally operated by GE Americom, acquired by SES Global in 2001.
Americom was also operating the older Satcom fleet, whose last operating spacecraft were fully retired in the early 2000s.
Astra's principle of "co-location" (several satellites are maintained close to each other, all within a cube with a size of 150 km (93 mi).
The O3b fleet was initially owned and operated by O3b Networks, which became a wholly owned subsidiary of SES in 2016[120] Orbiting in Medium Earth orbit (MEO), the first generation satellites are sometimes referred to as "O3b MEO" to more clearly distinguish them from the second generation O3b mPOWER constellation - first launched in 2016, and commenced service in 2024.
[121] [122][123] SES also manages some transponders on a few third-party satellites under joint operating agreements.