Investor Relations

SIRIUS REACHES KEY MILESTONE

Consumers Embrace SIRIUS as Satellite Radio Broadcaster Reports 100,000 Subscribers

NEW YORK – June 23, 2003 – SIRIUS (NASDAQ: SIRI), known for delivering the very best in commercial-free music and premium broadcast entertainment, today announced the appointment of radio industry veteran Jay Clark as Executive Vice President, Programming. Clark, who joined SIRIUS in April 2002 as Vice President of Entertainment/Information Programming, will now be responsible for all of the company’s programming initiatives and content over its 60 commercial-free music streams and 40+ news, sports and entertainment streams.

Known as an innovator, Clark brings over 30 years of radio experience to SIRIUS. Before joining the company, he worked for many of the country’s leading broadcast groups, including Infinity Broadcasting, ABC Radio Inc., Greater Media and Entercom. Some of the radio stations he has helped develop over his career include WRKO-AM/ Boston, WABC/New York, KLSX/Los Angeles, WLLZ Detroit, WTKS/Orlando, and WTIC/Hartford.

He was also Vice President/General Manager for the Sports Fan Radio Network, Vice President of Programming at Winstar New Media and Vice President Broadcast at Comedy World Radio Network. Clark served as a consultant to a number of leading Talk radio stations, both as an independent entrepreneur and as an associate with New York-based Sabo Media.

“Jay has done an excellent job in helping us to develop our news, sports and entertainment offering,” said Joseph P. Clayton, President and CEO of SIRIUS. “As we continue to grow in the years ahead, Jay’s extensive broadcasting experience will help SIRIUS secure its position as the quality entertainment leader.”

About SIRIUS

SIRIUS is the only satellite radio service bringing listeners more than 100 streams of the best music and entertainment coast-to-coast. SIRIUS offers 60 music streams with no commercials, along with over 40 world-class sports, news and entertainment streams for a monthly subscription fee of only $12.95, with greater savings for upfront payments of multiple months or a year or more. Stream Jockeys create and deliver uncompromised music in virtually every genre to our listeners 24 hours a day. Satellite radio products bringing SIRIUS to listeners in the car, truck, home, RV and boat are manufactured by Kenwood, Panasonic, Clarion and Audiovox, and are available at major retailers including Circuit City, Best Buy, Car Toys, Good Guys, Tweeter, Ultimate Electronics, Sears and Crutchfield. SIRIUS is the leading OEM satellite radio provider, with exclusive partnerships with DaimlerChrysler, Ford and BMW. Automotive brands currently offering SIRIUS radios in select new car models include BMW, MINI, Chrysler, Dodge, Jeep®, Nissan, Infiniti and Mazda. Automotive brands that have announced plans to offer SIRIUS in select models include Ford, Lincoln, Mercury, Mercedes-Benz, Jaguar, Volvo, Audi, Volkswagen, Land Rover and Aston Martin.

Click on www.sirius.com to listen to SIRIUS live, or to find a SIRIUS retailer or car dealer in your area.

Any statements that express, or involve discussions as to, expectations, beliefs, plans, objectives, assumptions, future events or performance with respect to SIRIUS Satellite Radio Inc. are not historical facts and may be forward-looking and, accordingly, such statements involve estimates, assumptions and uncertainties which could cause actual results to differ materially from those expressed in any forward-looking statements. Accordingly, any such statements are qualified in their entirety by reference to the factors discussed in our Annual Report on Form 10-K for the year ended December 31, 2002 filed with the Securities and Exchange Commission. Among the key factors that have a direct bearing on our results of operations are: our dependence upon third parties to manufacture, distribute, market and sell SIRIUS radios and components for those radios; the unproven market for our service; our competitive position and any events which affect the useful life of our satellites.