Sirius XM Radio (SIRI)

SIRIUS SATELLITE RADIO REPORTS RECORD SUBSCRIBER
GROWTH AND REVENUE FOR FOURTH QUARTER AND
FULL-YEAR 2005

NEW YORK – February 17, 2006 - SIRIUS Satellite Radio (NASDAQ: SIRI) today announced record fourth quarter and full-year 2005 financial and operating results, driven by better-than-expected subscriber growth across its distribution channels.

SIRIUS ended 2005 with 3,316,560 subscribers, reflecting a 190% increase in total subscribers for the year and record net subscriber additions of 2,173,302. For the fourth quarter, the company added 1,142,640 net subscribers, making SIRIUS the market share leader in terms of net satellite radio subscriber additions for the quarter. This was the best quarterly gain in the company’s history, and a 138% increase over net subscriber additions in the year-ago quarter. SIRIUS’ market share of satellite radio net subscriber additions was approximately 45% for full-year 2005 and approximately 56% for the fourth quarter.

Full-year 2005 revenue grew to $242.2 million, up 262% from $66.9 million in 2004, and ahead of guidance for the year. Average monthly churn for the fourth quarter and full-year 2005 was 1.5%, in line with guidance. Subscriber acquisition costs (SAC) per gross subscriber addition was $113 for the fourth quarter and $139 for full-year 2005, a 21% improvement over the full-year 2004 level and ahead of guidance of under $145 for 2005.

“2005 was our best year ever and a major milestone for SIRIUS, setting new records in subscribers, market share and revenue,” said Mel Karmazin, CEO of SIRIUS. “We continue to be the fastest growing U.S. provider in this exciting new entertainment category, with strong growth driven by tremendous demand for our products and our programming, including the NFL, Martha Stewart and Howard Stern. In 2006, we believe this positive momentum will be further reflected in our automotive OEM channel, where we expect to more than double our subscriber base.”