As a result of consumers not only listening to the radio from the comfort of their own homes, but also increasingly listening on-the-go, Sirius XM has seen a steady growth in its number of subscribers in recent years. In the first quarter of 2011, Sirius XM Holdings had an estimated 20.56 million subscribers in the United States. By 2018, however, this number had increased to over 33 million. This growing subscriber base has led to increasing financial success for the company. In the third quarter of 2018, Sirius XM's quarterly revenue exceeded the 1.4 billion U.S. dollar mark, a dramatic increase from the revenue of less than 725 million U.S. dollars at the beginning of 2011.
Although not available beyond North America, Sirius XM Holdings also has a popular Canadian satellite radio company called SiriusXM Canada. In June 2011, three years after the United States merger, SiriusXM’s Canadian affiliate companies that provide Sirius and XM also merged. Although subscriber numbers are small in comparison to its southern neighbor, SiriusXM Canada has maintained over 2.5 million subscribers since 2015 and it reached its highest number of 2.83 million subscribers at the beginning of 2017.