USX-Marathon Group Announces Revised First Quarter 2001 Results

The USX-Marathon Group (NYSE: MRO) announced today that USX Corporation's Form 10-Q, when filed with the Securities and Exchange Commission, will report revised first quarter net income of $500 million or $1.62 per share for the Marathon Group. This is a reduction of $7 million or 2 cents per share versus previously reported results.

Adjusted net income of the Marathon Group is $471 million or $1.52 per share excluding special items. The change is a result of reduced income for the Other Energy Related Businesses segment which is now reporting income from operations of $8 million versus the previously reported $19 million.

In addition, corresponding changes will be made reducing consolidated USX Corporation net income from $516 million to $509 million.

For more information on USX Corporation and the Marathon Group, visit our websites at http://www.usx.com/ or http://www.marathon.com/.

USX Corporation press releases are available through Company News On-Call by fax, 800-758-5804, ext. 929150, or at http://www.prnewswire.com/comp/929150.html; or by fax, 800-758-5804, ext. 133204, or at http://www.prnewswire.com/comp/133204.html.

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SOURCE: USX-Marathon Group

Contact: William E. Keslar or Don H. Herring of USX-Marathon Group,
412-433-6870

Website: http://www.usx.com/

Website: http://www.marathon.com/

Company News On-Call: http://www.prnewswire.com/comp/929150.html or fax,
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