SIRIUS Satellite Radio ended the first quarter with 4,077,747 subscribers, that's 761,187 additions from the year ago quarter, giving SIRIUS a marketshare of 57% satellite radio subscibers in the first quarter. Q1 2006 revenue grew to $126.7 million, with advertising revenue increasing to a record $7.3 million - effectively giving SIRIUS 53% of total satellite radio industry advertising revenue for the first quarter.

Monthly churn was 1.8% and SAC for the first quarter was $113. 534,958 net subsciber additions were through the retail channel (at 169% increase from Q105), and 225,343 subscribers were added from the automotive OEM channel.

As a result of such strong gains, SIRIUS has increased their full year guidance of net subscribers to 6.2 Million by EOY, a SAC of $110 and total revenue to exceed $600 million.