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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                   FORM 8-A/A


                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934



                       UNION PACIFIC RESOURCES GROUP INC.
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)



                   UTAH                                 13-2647483
- ------------------------------------------  ------------------------------------
 (State of incorporation or organization)   (I.R.S. Employer Identification No.)



              777 MAIN STREET
             FORT WORTH, TEXAS                           76102
- ------------------------------------------  ------------------------------------
(Address of principal executive offices)               (Zip Code)



If this Form relates to the registration of a class of debt securities and is
effective upon filing pursuant to General Instruction A(c)(1), please check the
following box. [ ]

If this Form relates to the registration of a class of debt securities and is to
become effective simultaneously with the effectiveness of a concurrent
registration statement under the Securities Act of 1933 pursuant to General
Instruction A(c)(2), please check the following box. [ ]


        SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(b)OF THE ACT:


       Title of each class                   Name of each exchange on which
       to be so registered                   each class is to be registered
       -------------------                   ------------------------------
            None                                          None


        SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(g)OF THE ACT:


                         Preferred Stock Purchase Rights
            ---------------------------------------------------------
                                (Title of class)


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Item 1.  Description of Registrant's Securities to be Registered.

                  On October 28, 1996 the Board of Directors of Union Pacific
Resources Group Inc. (the "Company") declared a dividend distribution of one
Right for each outstanding share of Common Stock (each, a "Common Share"), of
the Company to shareholders of record at the close of business on November 7,
1996. Each Right entitles the registered holder to purchase from the Company a
unit consisting of one one-hundredth of a share (a "Unit") of the Series A
Junior Participating Preferred Stock, par value $.01 per share, of the Company
(the "Preferred Shares"), or a combination of securities and assets of
equivalent value, at a Purchase Price of $135 per Unit, subject to adjustment.
The Purchase Price may be paid, at the option of the holder, in cash or Common
Shares having a value at the time of exercise equal to the Purchase Price. On
December 1, 1998, the Board of Directors of the Company, in accordance with the
terms set forth in Section 26 of the Rights Agreement (the "Original Rights
Agreement") dated as of October 28, 1996 between the Company and Harris Trust
and Savings Bank, a Rights Agent, approved the amendment and restatement of the
Original Rights Agreement effective as of December 1, 1998 (as so amended and
restated , the "Rights Agreement"). The description and terms of the Rights are
set forth in the Rights Agreement.

                  Initially, ownership of the Rights will be evidenced by the
Common Share certificates representing shares then outstanding, and no separate
Rights Certificates will be distributed. The Rights will separate from the
Common Shares and a Distribution Date will occur upon the earlier of (i) ten
business days following a public announcement that a person or group of
affiliated or associated persons (an "Acquiring Person") has acquired, or
obtained the right to acquire, beneficial ownership of 15% or more of the
outstanding Common Shares (the "Stock Acquisition Date"), or (ii) within ten
business days (or such later date as may be determined by the Board of Directors
prior to such time as any person or group of affiliated or associated persons
becomes an Acquiring Person) following the commencement of a tender offer or
exchange offer that would result in a person or group beneficially owning 15% or
more of the outstanding Common Shares. Until the Distribution Date, (i) the
Rights will be evidenced by the Common Share certificates and will be
transferred with and only with such Common Share certificates, (ii) new Common
Share certificates issued after November 7, 1996 will contain a notation
incorporating the Rights Agreement by reference and (iii) the surrender for
transfer of any certificates for Common Shares outstanding will also constitute
the transfer of the Rights associated with the Common Shares represented by such
certificate.

                  The Rights are not exercisable until the Distribution Date and
will expire at the close of business on October 28, 2006, unless earlier
redeemed by the Company as described below or unless a transaction under Section
13(d) of the Rights Agreement has occurred.

                  As soon as practicable after the Distribution Date, Rights
Certificates will be mailed to holders of record of the Common Shares as of the
close of business on the Distribution Date and, thereafter, the separate Rights
Certificates alone will represent the Rights. Except as otherwise determined by
the Board of Directors, and except in connection with the exercise of employee
stock options or stock appreciation rights or under any other benefit plan for
employees or directors or in


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connection with the exercise of warrants or conversion of convertible
securities, only Common Shares issued after November 7, 1996 and prior to the
Distribution Date will be issued with Rights.

                  Except in the circumstances described below, after the
Distribution Date each Right will be exercisable into one one-hundredth of a
Preferred Share (a "Preferred Share Fraction"). Each Preferred Share Fraction
carries voting and dividend rights that are intended to produce the equivalent
of one Common Share. The voting and dividend rights of the Preferred Shares are
subject to adjustment in the event of dividends, subdivisions and combinations
with respect to the Common Shares of the Company. In lieu of issuing
certificates for Preferred Share Fractions which are less than an integral
multiple of one Preferred Share (i.e. 100 Preferred Share Fractions), the
Company may pay cash representing the current market value of the Preferred
Share Fractions.

                  In the event that at any time following the Stock Acquisition
Date, (i) the Company is the surviving corporation in a merger with an Acquiring
Person and its Common Shares remain outstanding, (ii) a Person becomes the
beneficial owner of more than 15% of the then outstanding Common Shares other
than pursuant to a tender offer, share exchange or exchange offer that provides
fair value to all shareholders, (iii) an Acquiring Person engages in one or more
"self-dealing" transaction as set forth in the Rights Agreement, or (iv) during
such time as there is an Acquiring Person an event occurs that results in such
Acquiring Person's ownership interest being increased by more than 1% (e.g., a
reverse stock split), each holder of a Right will thereafter have the right to
receive, upon exercise, Common Shares (or, in certain circumstances, cash,
property or other securities of the Company) having a value equal to two times
the exercise price of the Right. In lieu of requiring payment of the Purchase
Price upon exercise of the Rights following any such event, the Company may
permit the holders simply to surrender the Rights, in which event they will be
entitled to receive Common Shares (and other property, as the case may be) with
a value of 50% of what could be purchased by payment of the full Purchase Price.
Notwithstanding any of the foregoing, following the occurrence of any of the
events set forth in clauses (i), (ii), (iii) or (iv) of this paragraph, all
Rights that are, or (under certain circumstances specified in the Rights
Agreement) were, beneficially owned by any Acquiring Person who was involved in
the transaction giving rise to any such event will be null and void. However,
Rights are not exercisable following the occurrence of any of the events set
forth above until such time as the Rights are no longer redeemable by the
Company as set forth below.

                  For example, at an exercise price of $135 per Right, each
Right not otherwise voided following an event set forth in the preceding
paragraph would entitle its holder to purchase $270 worth of Common Shares (or
other consideration, as noted above) for $135. Assuming that the Common Shares
had a per share value of $27 at such time, the holder of each valid Right would
be entitled to purchase ten Common Shares for $135. Alternatively, the Company
could permit the holder to surrender each Right in exchange for stock or cash
equivalent to five Common Shares (with a value of $135) without payment of any
consideration other than the surrender of the Right.

                  In the event that, at any time following the Stock Acquisition
Date, (i) the Company is acquired in a merger or other business combination
transaction in which the Company is not the surviving corporation (other than a
merger that is described in, or that follows a tender offer, share



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exchange or exchange offer described in, the second preceding paragraph), or
(ii) 50% or more of the Company's assets or earning power is sold or
transferred, each holder of a Right (except Rights that previously have been
voided as set forth above) shall thereafter have the right to receive, upon
exercise, common shares of the acquiring company having a value equal to two
times the exercise price of the Right. Again, provision is made to permit
surrender of the Rights in exchange for one-half of the value otherwise
purchasable. The events set forth in this paragraph and in the second preceding
paragraph are referred to as the "Triggering Events."

                  The Purchase Price payable, and the number of Units of
Preferred Shares or other securities or property issuable upon exercise of the
Rights are subject to adjustment from time to time to prevent dilution (i) in
the event of a stock dividend on, or a subdivision, combination or
reclassification of, the Preferred Shares, (ii) if holders of the Preferred
Shares are granted certain rights or warrants to subscribe for Preferred Shares
or convertible securities at less than the current market price of the Preferred
Shares, or (iii) upon the distribution to holders of the Preferred Shares of
evidences of indebtedness or assets (excluding regular quarterly dividends) or
of subscription rights or warrants (other than those referred to above).

                  With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments amount to at least 1% of the
Purchase Price. No fractional Units will be issued and, in lieu thereof, an
adjustment in cash will be made based on the market price of the Preferred
Shares on the last trading date prior to the date of exercise.

                  At any time until ten days following the Stock Acquisition
Date, the Company may redeem the Rights in whole, but not in part, at a price of
$.01 per Right. That ten day redemption period may be extended by the Board of
Directors so long as the Rights are still redeemable. Immediately upon the
action of the Board of Directors ordering redemption of the Rights, the Rights
will terminate and the only right of the holders of Rights will be to receive
the $.01 redemption price.

                  Until a Right is exercised, the holder thereof, as such, will
have no rights as a shareholder of the Company, including, without limitation,
the right to vote or to receive dividends. While the distribution of the Rights
will not be taxable to shareholders or to the Company, shareholders may,
depending upon the circumstances, recognize taxable income in the event that the
Rights become exercisable for Preferred Shares (or other consideration) of the
Company or for common shares of the acquiring company as set forth above.

                  Other than those provisions relating to the principal economic
terms of the Rights, any of the provisions of the Rights Agreement may be
amended by the Board of Directors of the Company prior to the Distribution Date.
After the Distribution Date, the provisions of the Rights Agreement may be
amended by the Board in order to cure any ambiguity, to make changes that do not
adversely affect the interests of holders of Rights (excluding the interests of
any Acquiring Person), or to shorten or lengthen any time period under the
Rights Agreement; provided, however, that no amendment to adjust the time period
governing redemption shall be made at such time as the Rights are not
redeemable.



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                  A copy of the Rights Agreement is being filed with the
Securities and Exchange Commission as an Exhibit to this Registration Statement
on Form 8-A/A. This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference of the Rights Agreement,
which is incorporated herein by reference.

Item 2.  Exhibits.


         1.   Amended and Restated Rights Agreement, dated as of December 1,
              1998, between Union Pacific Resources Group Inc. and Harris Trust
              and Savings Bank, as Rights Agent.



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                                    SIGNATURE


                  Pursuant to the requirements of Section 12 of the Securities
Exchange Act of 1934, the registrant has duly caused this registration statement
to be signed on its behalf by the undersigned, thereunto duly authorized.


                                          UNION PACIFIC RESOURCES GROUP INC.



                                          By:    /s/ JOSEPH A. LASALA, JR.
                                                --------------------------------
                                                Name: Joseph A. LaSala, Jr.
                                                Title: Vice President, General
                                                       Counsel and Secretary
                                                       

Dated:  February 5, 1999






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                                  Exhibit Index
                                  -------------



Exhibit                                                                                  Sequentially
Number                             Description                                           Numbered Page
- -------                            -----------                                           -------------

                                                                                   
     1.       Amended and Restated Rights Agreement, dated as of December 1,
              1998, between Union Pacific Resources Group Inc. and Harris Trust
              and Savings Bank, as Rights Agent.