Indianapolis 500 to Air Live on SiriusXM

NEW YORK, May 26, 2011 /PRNewswire/ — Sirius XM Radio (NASDAQ: SIRI), the
Official Satellite Radio Partner of INDYCAR, the sanctioning body for the IZOD
IndyCar® Series and Firestone Indy Lights, announced today that it will
celebrate the 100th anniversary of the world-renowned Indianapolis 500 with
comprehensive coverage of the race and the events leading up to it.

SiriusXM listeners will have access to the live call of “The Greatest Spectacle
in Racing” from Indianapolis Motor Speedway this Sunday, May 29, on channel 94
on XM and channel 212 on Sirius Premier (formerly known as “The Best of XM”).
Motorsports fans will hear pre-race programming, including expert commentary and
analysis, interviews with drivers and live coverage of driver introductions.
When the green flag drops at 12:00 pm ET, SiriusXM listeners will hear the race
live in its entirety, followed by a post-race recap and interviews.

In addition to the Indianapolis 500, SiriusXM will broadcast the Firestone
Freedom 100 race featuring the Firestone Indy Lights at 12:00 pm ET on Friday,
May 27. The 100-mile race from INDYCAR’s developmental series features some of
the world’s best young open-wheel drivers. After the Firestone Freedom 100,
SiriusXM will air the IZOD Indy 500 Pit Stop Challenge and a recap of the day’s
Indy 500 practice. All broadcasts air nationwide on channel 94 on XM and channel
212 on Sirius Premier.

IZOD IndyCar Series drivers Danica Patrick, Dario Franchitti and Helio
Castroneves stopped by the SiriusXM studios in New York this week to discuss the
centennial anniversary race at the Brickyard and also serve as guest DJs on
various SiriusXM music channels.

Patrick was a guest DJ on Lithium, channel 34, SiriusXM’s 90s alternative rock
channel, Franchitti played his favorite songs on SiriusXM’s 90s on 9 channel,
and Castroneves played rock and pop hits from the 2000s and today on The Pulse,
channel 10. The guest DJ sessions will air on their respective channels starting
Friday, May 27, and replay throughout the weekend.

SiriusXM’s motor racing coverage on Sunday, May 29, will also include the
Coca-Cola 600 NASCAR Sprint Cup Series race from Charlotte Motor Speedway, 6:00
pm ET on channel 90 on Sirius and XM Premier (formerly known at “The Best of
Sirius”), as well as the Formula One(TM) Grand Prix of Monaco, 8:00 am ET on
channel 94 on Sirius and channel 208 on XM.

For more information, please visit http://www.siriusxm.com.

About Sirius XM Radio

Sirius XM Radio is America’s satellite radio company. SiriusXM broadcasts more
than 135 satellite radio channels of commercial-free music, and premier sports,
news, talk, entertainment, traffic, weather, and data services to 20.6 million
subscribers. SiriusXM offers an array of content from many of the biggest names
in entertainment, as well as from professional sports leagues, major colleges,
and national news and talk providers.

SiriusXM programming is available on more than 800 devices, including
pre-installed and after-market radios in cars, trucks, boats and aircraft,
smartphones and mobile devices, and consumer electronics products for homes and
offices. SiriusXM programming is also available at siriusxm.com, and on Apple,
BlackBerry and Android-powered mobile devices.

SiriusXM has arrangements with every major automaker and its radio products are
available for sale at shop.siriusxm.com as well as retail locations nationwide.

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 future financial and operating results,
our plans, objectives, expectations and intentions with respect to future
operations, products and services; and other statements identified by words such
as “will likely result,” “are expected to,” “will continue,” “is anticipated,”
“estimated,” “intend,” “plan,” “projection,” “outlook” or words of similar
meaning. Such forward-looking statements are based upon the current beliefs and
expectations of our 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: our competitive position versus other forms of audio
and video entertainment; our ability to retain subscribers and maintain our
average monthly revenue per subscriber; our dependence upon automakers and other
third parties; our substantial indebtedness; and the useful life of our
satellites, which, in most cases, are not insured. Additional factors that could
cause our results to differ materially from those described in the
forward-looking statements can be found in ourAnnual Report on Form 10-K for the
year ended December 31,2010, which is 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 we disclaim any intention or obligation to update any forward
looking statements as a result of developments occurring after the date of this
communication.

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P-SIRI

Media contact:
Andrew FitzPatrick
SiriusXM
212-901-6693
andrew.fitzpatrick@siriusxm.com

SOURCE Sirius XM Radio