Investor Relations

SIRIUS XM Radio Announces Second Quarter 2008 Results Conference Call

NEW YORK, Aug 01, 2008 /PRNewswire-FirstCall via COMTEX News Network/ -- Company to Webcast Earnings Call for Investors and Media

SIRIUS XM Radio (Nasdaq: SIRI) today announced that it plans to release second quarter 2008 financial and operating results on Thursday, August 7, 2008.

(Logo: http://www.newscom.com/cgi-bin/prnh/19991118/NYTH125)

SIRIUS XM also plans to hold a conference call at 8:00 am ET to discuss these results. Investors and the press can listen to the conference call via the company's website, www.sirius.com and on its satellite radio service by tuning to SIRIUS channel 119 or XM Live, channel 120.

A replay of the call will be available on www.sirius.com.

About SIRIUS XM Radio

SIRIUS XM Radio is America's satellite radio company delivering the "The Best Radio on Radio" to more than 18 million subscribers, including 100% commercial free music, and premier sports, news, talk, entertainment, traffic and weather.

SIRIUS XM Radio has exclusive content relationships with an array of personalities and artists, including Howard Stern, Oprah, Martha Stewart, Jimmy Buffett, Elvis, Jamie Foxx, Barbara Walters, Frank Sinatra, Opie & Anthony, The Grateful Dead, Willie Nelson, Bob Dylan, Dale Earnhardt Jr., Tom Petty, and Bob Edwards. SIRIUS XM Radio is the leader in sports programming as the Official Satellite Radio Partner of the NFL, Major League Baseball, NASCAR, NHL, and PGA Tour, and broadcasts major college sports.

SIRIUS XM Radio has exclusive arrangements with every major automaker. SIRIUS XM Radio products are available at shop.sirius.com and shop.xmradio.com, and at retail locations nationwide, including Best Buy, Circuit City, RadioShack, Target, Sam's Club, and Wal-Mart.

SIRIUS XM Radio also offers SIRIUS Backseat TV, the first ever live in-vehicle rear seat entertainment featuring Nickelodeon, Disney Channel and Cartoon Network; XM NavTraffic service for GPS navigation systems delivers real-time traffic information, including accidents and road construction, for more than 80 North American markets.

This communication contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about the benefits of the business combination transaction involving SIRIUS and XM, including potential synergies and cost savings and the timing thereof, future financial and operating results, the combined company's plans, objectives, expectations and intentions with respect to future operations, products and services; and other statements identified by words such as "anticipate," "believe," "plan," "estimate," "expect," "intend," "will," "should," "may," or words of similar meaning. Such forward-looking statements are based upon the current beliefs and expectations of management and are inherently subject to significant business, economic and competitive uncertainties and contingencies, many of which are difficult to predict and generally beyond our control. Actual results may differ materially from the results anticipated in these forward-looking statements.

The following factors, among others, could cause actual results to differ materially from the anticipated results or other expectations expressed in the forward-looking statement: general business and economic conditions; the performance of financial markets and interest rates; the failure to realize synergies and cost-savings from the transaction or delay in realization thereof; the businesses of SIRIUS and XM may not be combined successfully, or such combination may take longer, be more difficult, time-consuming or costly to accomplish than expected; and operating costs and business disruption following the merger, including adverse effects on employee retention and on our business relationships with third parties, including manufacturers of radios, retailers, automakers and programming providers. Additional factors that could cause our results to differ materially from those described in the forward-looking statements can be found in SIRIUS' and XM's Annual Reports on Form 10-K for the year ended December 31, 2007, which are filed with the Securities and Exchange Commission (the "SEC") and available at the SEC's Internet site (http://www.sec.gov). The information set forth herein speaks only as of the date hereof, and SIRIUS and XM disclaim any intention or obligation to update any forward looking statements as a result of developments occurring after the date of this communication.

G-SIRI

Investor Relations Contact:

    Shirley Huang
    SIRIUS XM Radio
    shuang@siriusradio.com
    212-584-5242

SOURCE SIRIUS XM Radio

http://shop.sirius.com

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