EXHIBIT 99.1

NEWS RELEASE


                             FOR FURTHER INFORMATION:

                             Media Relations:            Investor Relations:
                             Jim Vitak                   Bill Henderson
                             (614) 790-3715              (859) 815-4454
                             jevitak@ashland.com         wehenderson@ashland.com

                             FOR IMMEDIATE RELEASE
                             December 20, 2004


ASHLAND INC. PROVIDES UPDATE ON THE
PROPOSED TRANSFER OF ITS INTEREST IN
MARATHON ASHLAND PETROLEUM LLC

COVINGTON,  Ky. - Ashland Inc.  announced  today that the Internal  Revenue
Service (IRS) has now indicated  that it does not intend to provide all the
rulings  requested by Ashland Inc.  and  Marathon  Oil  Corporation  in the
proposed  transaction to transfer Ashland's 38-percent interest in Marathon
Ashland Petroleum LLC (MAP) to Marathon.
     As  previously  announced  in  March  2004,  Ashland  entered  into an
agreement with Marathon through which Ashland would transfer its 38-percent
interest  in MAP  to  Marathon.  The  transaction  is  subject  to  several
previously disclosed  conditions,  including receipt of a favorable private
letter  ruling  from  the IRS  with  respect  to the tax  treatment  of the
transaction.  Earlier this year, Ashland submitted a request to the IRS for
a private letter ruling on the tax treatment of the transaction.
     Ashland reported in its Form 10-K filing on December 14, 2004, that it
had  engaged in  discussions  with the IRS with  respect to the complex tax
issues related to this transaction and had not resolved all issues. At that
time,  Ashland  reported  that it could not predict  whether the  requested
rulings would be received.
     The IRS has now  indicated  that it does not intend to provide all the
rulings requested by Ashland and Marathon. As previously disclosed, Ashland
might have incurred  Section  355(e) gain on the  transaction  equal to the
difference  between the fair  market  value of Ashland and the tax basis of
Ashland. One of the IRS rulings requested was that the tax basis in Ashland



                                  -more-



not be reduced by the assumption of contingent  liabilities associated with
discontinued  business  operations  in a way that  would  cause  additional
Section  355(e) gain to be  recognized.  The IRS has  informed  Ashland and
Marathon  that it  intends to rule  adversely  on this  specific  tax basis
issue.  Under the IRS' indicated  position on this issue,  the basis of the
Ashland  shares  would  be  reduced  by  the  amount  of  such   contingent
liabilities  in a manner that would likely  create  significant  additional
Section  355(e) gain.  Ashland  believes that the IRS would grant all other
requested rulings that are conditions to closing the transaction.
     Ashland and Marathon disagree with the IRS' position on the contingent
liabilities  issue and will attempt to further  discuss this issue with the
IRS.  However,  Ashland  believes that it is unlikely  that the  previously
announced   transaction  will  close.  Ashland  remains  pleased  with  its
ownership  interest  in MAP and,  therefore,  does  not  have any  plans to
exercise its option to put its interest in MAP to Marathon. Nonetheless, if
the previously announced transaction does not close, Ashland would consider
other alternatives for the transfer of its interest to Marathon. There is a
substantial  risk  that  no  acceptable  alternative  transaction  will  be
identified.
     Ashland Inc. (NYSE: ASH) is a Fortune 500 transportation construction,
chemical and petroleum  company providing  products,  services and customer
solutions  throughout  the  world.  To  learn  more  about  Ashland,  visit
www.ashland.com.
                                    -0-

FORWARD-LOOKING STATEMENTS
This news release contains forward-looking  statements,  within the meaning
of  Section  27A of the  Securities  Act of  1933  and  Section  21E of the
Securities  Exchange Act of 1934. These statements include those that refer
to  Ashland's  expectations  about the MAP  transaction.  Although  Ashland
believes its  expectations are based on reasonable  assumptions,  it cannot
assure the  expectations  reflected  herein  will be  achieved.  The risks,
uncertainties, and assumptions include the possibility that Ashland will be
unable to fully realize the benefits  anticipated from the MAP transaction;
the possibility of failing to receive a favorable  ruling from the Internal
Revenue Service;  the possibility that Ashland fails to obtain the approval
of its shareholders;  the possibility that the transaction may not close or
that  Ashland may be required to modify some aspect of the  transaction  to
obtain regulatory  approvals;  and other risks that are described from time
to time in the Securities and Exchange Commission (SEC) reports of Ashland.
Other factors and risks  affecting  Ashland are contained in Ashland's Form
10-K for the  fiscal  year ended  Sept.  30,  2004,  filed with the SEC and
available     on     Ashland's     Investor     Relations     website    at
www.ashland.com/investors  or the SEC's  website  at  www.sec.gov.  Ashland
undertakes   no   obligation   to   subsequently   update  or  revise   the
forward-looking  statements  made in this news release to reflect events or
circumstances after the date of this news release.

Additional Information about the MAP Transaction
In connection  with the proposed  transaction,  Ashland filed a preliminary
proxy  statement  on  Schedule  14A with  the SEC on June  21,  2004 and an
amended preliminary proxy statement on Schedule 14A on August 31, 2004. ATB
Holdings Inc. and New EXM Inc. filed a registration  statement on Form S-4,
which includes a further amended  preliminary  proxy  statement/prospectus,
with the SEC on October 12, 2004.  Investors and security holders are urged
to read those documents and any other relevant documents filed or that will
be filed with the SEC, including the definitive proxy  statement/prospectus
regarding the proposed  transaction as they become available,  because they
contain,  or will contain,  important  information.  The  definitive  proxy
statement/prospectus  will be filed with the SEC by Ashland,  and  security
holders may obtain a free copy of the definitive proxy statement/prospectus
when it  becomes  available,  and  other  documents  filed  with the SEC by
Ashland,  including the preliminary proxy statement at the SEC's website at
www.sec.gov. The definitive proxy statement/prospectus, and other documents
filed with the SEC by Ashland,  including the preliminary  proxy statement,
may also be  obtained  for free in the SEC  filings  section  on  Ashland's
Investor Relations website at www.ashland.com/investors,  or by directing a
request to Ashland at 50 E.  RiverCenter  Blvd.,  Covington,  KY 41012. The
respective  directors and  executive  officers of Ashland and other persons
may be deemed to be  participants  in solicitation of proxies in respect of
the proposed  transaction.  Information  regarding  Ashland's directors and
executive  officers is available in its proxy  statement filed with the SEC
by Ashland on December 14, 2004. Investors may obtain information regarding
the interests of participants in the  solicitation of proxies in connection
with the transaction referenced in the foregoing information by reading the
definitive proxy statement/prospectus when it becomes available.