Filed by USX Corporation
                           Pursuant to Rule 425 under the Securities Act of 1933
                                        And deemed filed pursuant to Rule 14a-12
                                          Of the Securities Exchange Act of 1934
                                                Subject Company: USX Corporation
                                                      Commission File No. 1-5153

Pittsburgh, PA, May 8, 2001 - USX Corporation stated today that it has received
a number of questions concerning the impact of the plan of reorganization of the
corporation announced April 24, 2001 on its preferred securities and industrial
revenue bonds.  In response to these questions USX states that the announcement
of the plan of reorganization has no impact on any of USX's obligations.
Implementation of the plan of reorganization is contingent upon shareholder
approval and a number of other conditions which are discussed in the April 24,
2001 press release.  If the plan of reorganization described in the April 24,
2001 press release occurs USX anticipates the following impacts on certain
issues.

6.5% Cumulative Convertible Preferred
Details of the exact treatment of this issue are still being examined and will
be disclosed in the proxy statement USX intends to distribute to the holders of
both classes of common stock.

6.75% Convertible Quarterly Income Preferred Securities issued by USX Capital
Trust I
Details of the exact treatment of this issue are still being examined and will
be disclosed in the proxy statement USX intends to distribute to the holders of
both classes of common stock.

8 3/4% Cumulative Monthly Preferred Shares, Series A issued by USX Capital LLC
These shares would remain outstanding.  USX Capital LLC would become a
subsidiary of Marathon and the Guarantee issued by USX in connection with these
shares would become an obligation of Marathon.

Industrial Revenue Bonds
Although these are obligations of various government entities they are supported
by an agreement between USX and the applicable entity relating to environmental
projects.  The terms of these support agreements are generally similar to the
terms of the public debt issued by USX.  As stated in the April 24, 2001 press
release "It is planned that all public debt that remains outstanding will remain
with Marathon" and it is anticipated that the same will be generally true in
regards to the Industrial Revenue Bonds.

In each case current holders and prospective purchasers of any of these
securities should refer to the governing agreements regarding all of the terms
and conditions of such securities.  In responding to these questions from
current holders, USX is not making any recommendation concerning the purchase or
sale of such securities and is not offering to purchase any security or
soliciting offers to sell from holders of these securities.

The foregoing contains "forward-looking statements" which are based on (1) a
number of assumptions concerning future events made by management and (2)
information currently available to management.  Readers are cautioned not to put
undue reliance on such forward-looking statements, which are not a guarantee of
performance and are subject to a number of uncertainties and other facts, many
of which are outside USX Corporation's control, that could cause actual events
to differ materially from such statements.  For a more detailed description of
the factors that could cause such a difference, please see USX Corporation's
filings with the Securities and Exchange Commission.  There are also a number of
uncertainties, risks, conditions and other factors which could prevent the
implementation of the above described plan of reorganization.

In connection with the Plan of Reorganization announced on April 24, 2001 USX
Corporation intends to file a proxy statement and other materials with the
Securities and Exchange Commission. Security holders are urged to read these
materials when they become available because they will contain important
information. Investors and security holders may obtain a free copy of these
materials when they become available as well as other materials filed with the
Securities and Exchange Commission concerning USX Corporation at the Securities
and Exchange Commission's website at http://www.sec.gov. In addition, these
materials and other documents may be obtained for free from USX Corporation by
directing a request to USX Corporation at 600 Grant Street, Pittsburgh, PA
15219; Attn: Investor Relations.

USX Corporation and its officers and directors may be deemed to be participants
in the solicitation of proxies from USX Corporation's stockholders with respect
to these transactions. Information regarding such officers and directors is
included in USX Corporation's proxy statement for its 2001 annual meeting of
stockholders filed with the Securities and Exchange Commission on March 12,
2001. This document is available free of charge at the SEC's internet site or
from USX Corporation as described above.