Sirius and XM merger (2008)
The two rival U.S. satellite radio companies, Sirius and XM, merged after a long regulatory review. The deal created a single operator running two separate satellite networks.
The combined company avoided a price war and consolidated subscribers under one brand.
SiriusXM inherited two fleets that now age on different schedules, which is why replacements like SXM-11 carry both XM and Sirius lineage.
The merger explains the odd satellite naming and why one company must keep two legacy networks alive at once.
