Marathon Oil Corporation to Participate in UBS Global Oil and Gas Conference

Marathon Oil Corporation to Participate in UBS Global Oil and Gas Conference

HOUSTON, May 16, 2013 (GLOBE NEWSWIRE) -- Marathon Oil Corporation (NYSE: MRO)
announced today that Janet F. Clark, Marathon Oil executive vice president and
chief financial officer, will present at the UBS Global Oil and Gas Conference
in Austin on Tuesday, May 21 at 9:25 a.m. CDT.

A live webcast of the remarks will be accessible via Marathon Oil's website at
http://www.marathonoil.com. This presentation and associated
question-and-answer session will include forward-looking information. A replay
of the presentation will be available and archived on Marathon Oil's website
until June 21, 2013.

Marathon Oil Corporation is an international exploration and production
company. Based in Houston, Texas, the Company had net proved reserves at the
end of 2012 of 2 billion barrels of oil equivalent in North America, Europe
and Africa. For more information, please visit our website at
http://www.marathonoil.com.

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