EXHIBIT 4

                      SECOND AMENDMENT TO RIGHTS AGREEMENT

                  This Second Amendment to Rights Agreement (this "Second
Amendment") is entered into by and among Atmos Energy Corporation, a Texas and
Virginia corporation (the "Company"), and EquiServe Trust Company, N.A., a
national association with its principal place of business in Massachusetts and
the successor to the stock transfer business of Fleet National Bank (formerly
known as BankBoston, N.A) (the "Rights Agent"), on this 13th day of February
2002, at the direction of the Company.

                  WHEREAS, the Company and the Rights Agent have entered into
that certain Rights Agreement, dated November 12, 1997 (the "Rights Agreement");
and

                  WHEREAS, the Company and the Rights Agent have entered into
that that certain First Amendment, dated as of August 11, 1999, to the Rights
Agreement; and

                  WHEREAS, on February 12, 2002, the Board of Directors of the
Company determined to amend the Rights Agreement and directed the Rights Agent
to enter into this Second Amendment.

                  NOW, THEREFORE, in consideration of the premises and the
mutual agreements herein set forth, the parties hereto do hereby agree as
follows:

                  1.       The Rights Agreement is hereby amended as follows:

                           (a) All references in the Rights Agreement to
         BankBoston, N.A. shall hereafter be deemed to be references to its
         successor with respect to this Rights Agreement, EquiServe Trust
         Company, N.A.

                           (b) The recital of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                                    "WHEREAS, on November 12, 1997 (the "Rights
                  Dividend Declaration Date"), the Board of Directors of the
                  Company authorized and declared a dividend distribution of one
                  Right (as hereinafter defined) for each share of common stock,
                  no par value, of the Company (the "Common Stock") outstanding
                  at the close of business on May 10, 1998 (the "Record Date"),
                  and has authorized the issuance of one Right (as such number
                  may hereinafter be adjusted pursuant to the provisions of
                  Section 11(p) hereof)





                  for each share of Common Stock of the Company issued between
                  the Record Date (whether originally issued or delivered from
                  the Company's treasury) and the Distribution Date (as
                  hereinafter defined), each Right initially representing the
                  right to purchase one share of Common Stock, upon the terms
                  and subject to the conditions hereinafter set forth (the
                  "Rights");

                                    WHEREAS, on August 11, 1999 the Company and
                  the Rights Agent entered into that certain First Amendment to
                  this Agreement; and

                                    WHEREAS, the Board of Directors of the
                  Company has authorized the Company to enter into that certain
                  Second Amendment to the Rights Agreement, which amendment
                  shall provide that each Right shall hereafter represent the
                  right to purchase one-tenth of one share of Common Stock, upon
                  the terms and subject to the conditions hereinafter set forth,
                  and such other amendments as are provided for in that certain
                  Second Amendment."

                           (c) Section 1(b.1) of the Rights Agreement is hereby
         amended to read in its entirety as follows:


                               "(b.1) "Adjusted Exercise Price" shall have the
                  meaning set forth in Section 11(a)(ii) hereof."

                           (d) The second sentence of Section 4(a) of the Rights
         Agreement is hereby amended to read in its entirety as follows:

                               "Subject to the provisions of Section 11 and
                  Section 22 hereof, the Rights Certificates, whenever
                  distributed, shall be dated as of the Record Date and on their
                  face shall entitle the holders thereof to purchase such number
                  of one-tenths of a share of Common Stock as shall be set forth
                  therein at the price set forth therein (such exercise price
                  per one-tenth of a share, the "Purchase Price"), but the
                  amount and type of securities purchasable upon the exercise of
                  each Right and the Purchase Price thereof shall be subject to
                  adjustment as provided herein."

                           (e) Section 7(a) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(a) Subject to Section 7(e) hereof, at any time
                  after the Distribution Date, the registered holder of any
                  Rights Certificate may




                                       2


                  exercise the Rights evidenced thereby (except as otherwise
                  provided herein including, without limitation, the
                  restrictions on exercisability set forth in Section 9(c),
                  Section 11(a)(iii) and Section 23(a) hereof) in whole or in
                  part upon surrender of the Rights Certificate, with the form
                  of election to purchase and the certificate on the reverse
                  side thereof duly executed, to the Rights Agent at the
                  principal office or offices of the Rights Agent designated for
                  such purpose, together with payment of the aggregate Purchase
                  Price with respect to the total number of one-tenths of a
                  share of Common Stock (or other securities, cash or other
                  assets, as the case may be) as to which such surrendered
                  Rights are then exercisable, at or prior to the earlier of (i)
                  5:00 P.M., Boston, Massachusetts time, on May 10, 2008 or such
                  later date as may be established by the Board of Directors
                  prior to the expiration of the Rights (such date, as it may be
                  extended by the Board, the "Final Expiration Date"), or (ii)
                  the time at which the Rights are redeemed as provided in
                  Section 23 hereof (the earlier of (i) and (ii) being herein
                  referred to as the "Expiration Date")."

                           (f) Section 7(b) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(b) The Purchase Price for each one-tenth of a
                  share of Common Stock pursuant to the exercise of a Right
                  shall initially be $8.00 (or the equivalent of $80 per share
                  of Common Stock), and shall be subject to adjustment from time
                  to time as provided in Section 11 and Section 13(a) hereof and
                  shall be payable in accordance with paragraph (c) below."

                           (g) The first two sentences of Section 7(c) of the
         Rights Agreement are hereby amended to read in their entirety as
         follows:

                               "(c) Upon receipt of a Rights Certificate
                  representing exercisable Rights, with the form of election to
                  purchase and the certificate duly executed, accompanied by
                  payment, with respect to each Right so exercised, of the
                  Purchase Price (or, after the occurrence of a Section
                  11(a)(ii) Event or a Section 13 Event, the Adjusted Exercise
                  Price) for the number of one-tenths of a share of Common Stock
                  (or other shares, securities, cash or other assets, as the
                  case may be) to be purchased as set forth below and an amount
                  equal to any applicable transfer tax, the Rights Agent shall,
                  subject to Section 20(k) hereof, thereupon promptly (i) (A)
                  requisition from any transfer agent of the shares of Common
                  Stock (or make available, if the Rights Agent is the transfer
                  agent for such shares) certificates for the total number of
                  shares of Common Stock to be purchased and the Company hereby
                  irrevocably authorizes its transfer agent to comply with all
                  such requests, or (B) if the Company shall have




                                       3


                  elected to deposit the total number of shares of Common Stock
                  issuable upon exercise of the Rights hereunder with a
                  depositary agent, requisition from the depositary agent
                  depositary receipts representing such number of shares of
                  Common Stock as are to be purchased (in which case
                  certificates for the shares of Common Stock represented by
                  such receipts shall be deposited by the transfer agent with
                  the depositary agent) and the Company will direct the
                  depositary agent to comply with such request, (ii) requisition
                  from the Company the amount of cash, if any, to be paid in
                  lieu of fractional shares in accordance with Section 14
                  hereof, (iii) after receipt of such certificates or depositary
                  receipts, cause the same to be delivered to or upon the order
                  of the registered holder of such Rights Certificate,
                  registered in such name or names as may be designated by such
                  holder, and (iv) after receipt thereof, deliver such cash, if
                  any, to or upon the order of the registered holder of such
                  Rights Certificate. The payment of the Purchase Price or the
                  Adjusted Exercise Price (as such amounts may be reduced
                  pursuant to Section 11(a)(iii) hereof) shall be made in cash
                  or by certified bank check or bank draft payable to the order
                  of the Company. "

                           (h) Section 9(a) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(a) The Company covenants and agrees that it
                  will cause to be reserved and kept available out of its
                  authorized and unissued shares of Common Stock and/or other
                  securities or out of its authorized and issued shares held in
                  its treasury, the number of shares of Common Stock and/or
                  other securities that, as provided in this Agreement, will be
                  sufficient to permit the exercise in full of all outstanding
                  Rights after the Distribution Date but prior to a Section
                  11(a)(ii) Event."

                           (i) Section 9(d) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(d) The Company covenants and agrees that
                  it will take all such action as may be necessary to ensure
                  that all shares of Common Stock and/or other securities
                  delivered upon exercise of Rights shall, at the time of
                  delivery of the certificates for such shares (subject to
                  payment of the Purchase Price for each one-tenth of a share of
                  Common Stock to be purchased or, after a Section 11(a)(ii)
                  Event, the Adjusted Exercise Price), be duly and validly
                  authorized and issued and fully paid and nonassessable."

                           (j) The first sentence of Section 10 of the Rights
         Agreement is hereby amended to read in its entirety as follows:



                                       4

                               "Each person in whose name any certificate for
                  shares of Common Stock and/or other securities, as the case
                  may be, is issued upon the exercise of Rights shall for all
                  purposes be deemed to have become the holder of record of such
                  shares of Common Stock and/or other securities, as the case
                  may be, represented thereby on, and such certificate shall be
                  dated, the date upon which the Rights Certificate evidencing
                  such Rights was duly surrendered and payment of the Purchase
                  Price or, if applicable, the Adjusted Exercise Price (and all
                  applicable transfer taxes) was made; provided, however, that
                  if the date of such surrender and payment is a date upon which
                  the Common Stock (or other securities, as the case may be)
                  transfer books of the Company are closed, such Person shall be
                  deemed to have become the record holder of such shares
                  (fractional or otherwise) on, and such certificate shall be
                  dated, the next succeeding Business Day on which the Common
                  Stock (or other securities, as the case may be) transfer books
                  of the Company are open."

                           (k) The first sentence of Section 11(a)(i) of the
         Rights Agreement is hereby amended to read in its entirety as follows:

                               "(a)(i) In the event the Company shall at any
                  time after the date of this Agreement (A) declare a dividend
                  on the Common Stock payable in shares of Common Stock, (B)
                  subdivide the outstanding Common Stock, (C) combine the
                  outstanding Common Stock into a smaller number of shares, or
                  (D) issue any shares of its capital stock in a
                  reclassification of the Common Stock (including any such
                  reclassification in connection with a consolidation or merger
                  in which the Company is the continuing or surviving
                  corporation), except as otherwise provided in this Section
                  11(a) and Section 7(e) hereof, the Purchase Price in effect at
                  the time of the record date for such dividend or of the
                  effective date of such subdivision, combination or
                  reclassification, and the number and kind of shares of Common
                  Stock or capital stock, as the case may be, issuable on such
                  date, shall be proportionately adjusted so that the holder of
                  any Right exercised after such time shall be entitled to
                  receive, upon payment of the Purchase Price or, if applicable,
                  the Adjusted Exercise Price, then in effect, the aggregate
                  number and kind of shares of Common Stock, or capital stock,
                  as the case may be, which, if such Right had been exercised
                  immediately prior to such date and at a time when the Common
                  Stock transfer books of the Company were open, such holder
                  would have owned upon such exercise and been entitled to
                  receive by virtue of such dividend, subdivision, combination
                  or reclassification; provided, however, that if the record
                  date for any such dividend, subdivision, combination or
                  reclassification shall occur prior to the Distribution Date,
                  the Company shall make an appropriate adjustment to the
                  Purchase Price (taking into




                                       5


                  account any additional Rights which may be issued as a result
                  of such dividend, subdivision, combination or
                  reclassification), in lieu of adjusting (as described above)
                  the number of shares of Common Stock (or other capital shares,
                  as the case may be) issuable upon exercise of the Rights."

                           (l) Section 11(a)(ii) of the Rights Agreement is
         hereby amended to read in its entirety as follows:

                               "(ii) In the event (A) any Person (other than the
                  Company, any Subsidiary of the Company, any employee benefit
                  plan of the Company or of any Subsidiary of the Company, or
                  any Person or entity organized, appointed or established by
                  the Company for or pursuant to the terms of any such plan),
                  alone or together with its Affiliates and Associates, shall,
                  at any time after the Rights Dividend Declaration Date, become
                  an Acquiring Person, unless the event causing the 15%
                  threshold to be crossed is a transaction set forth in Section
                  13(a) hereof, or is an acquisition of shares of Common Stock
                  pursuant to a tender offer or an exchange offer for all
                  outstanding shares of Common Stock at a price and on terms
                  determined by at least a majority of the members of the Board
                  of Directors who are not officers of the Company and who are
                  not representatives, nominees, Affiliates or Associates of an
                  Acquiring Person, after receiving advice from one or more
                  investment banking firms, to be (i) at a price which is fair
                  to shareholders (taking into account all factors which such
                  members of the Board deem relevant, including, without
                  limitation, prices which could reasonably be achieved if the
                  Company or its assets were sold on an orderly basis designed
                  to realize maximum value) and (ii) otherwise in the best
                  interests of the Company and its shareholders (a "Qualified
                  Offer"), or (B) the Board of Directors of the Company shall
                  declare any Person to be an Adverse Person, upon a
                  determination that such Person, alone or together with its
                  Affiliates and Associates, has, at any time after the Rights
                  Dividend Declaration Date, become the Beneficial Owner of an
                  amount of Common Stock which the Board of Directors determines
                  to be substantial (which amount shall in no event be less than
                  10% of the shares of Common Stock then outstanding) and a
                  determination by at least a majority of the Board of Directors
                  who are not officers of the Company, after reasonable inquiry
                  and investigation, including consultation with such persons as
                  such directors shall deem appropriate, that (i) such
                  Beneficial Ownership by such Persons is intended to cause the
                  Company to repurchase the Common Stock beneficially owned by
                  such Person or to cause pressure on the Company to take action
                  or enter into a transaction or series of transactions intended
                  to provide such Person with short-term financial gain under
                  circumstances where the Board of Directors determines that the
                  best long-term interests of the Company and its




                                       6


                  shareholders would not be served by taking such action or
                  entering into such transactions or series of transactions at
                  that time or (ii) such Beneficial Ownership is causing or
                  reasonably likely to cause a material adverse impact
                  (including, but not limited to, causing, or being reasonably
                  likely to cause, the Company to become a subsidiary of a
                  registered holding company under the Public Utility Holding
                  Company Act of 1935, as amended) on the business or prospects
                  of the Company, then, promptly following the occurrence of
                  such event, proper provision shall be made so that each holder
                  of a Right (except as provided below and in Section 7(e)
                  hereof) shall thereafter have the right to receive, upon
                  exercise thereof by payment (in lieu of the payment required
                  to be made pursuant to Section 7 to exercise a Right) of an
                  amount equal to the product of (x) the number of one-tenths of
                  a share of Common Stock that would otherwise be issuable upon
                  exercise of a Right after the Distribution Date if no Section
                  11(a)(ii) Event or Section 13 Event had occurred and (y) ten
                  times the then current Purchase Price for one-tenth of a share
                  of Common Stock that would have been payable in accordance
                  with the terms of this Agreement if such Right had been
                  exercised immediately prior to the first occurrence of a
                  Section 11(a)(ii) Event or Section 13 Event, such number of
                  whole shares of Common Stock of the Company (in lieu of the
                  number of one-tenths of a share of Common Stock for which such
                  Right would have been exercisable after the Distribution Date
                  and prior to the first occurrence of a Section 11(a)(ii) Event
                  or Section 13 Event) as shall equal the result obtained by (x)
                  multiplying the then-current Purchase Price for one-tenth of a
                  share of Common Stock immediately prior to the first
                  occurrence of a Section 11(a)(ii) Event or Section 13 Event by
                  ten times the number of one-tenths of a share of Common Stock
                  for which a Right would have been exercisable after the
                  Distribution Date and immediately prior to the first
                  occurrence of a Section 11(a)(ii) Event or Section 13 Event
                  and (y) dividing that product by 50% of the Current Market
                  Price (determined pursuant to Section 11(d) hereof) per share
                  of Common Stock on the date of such first occurrence (such
                  number of shares, the "Adjustment Shares"). The exercise price
                  of a Right determined pursuant to the immediately preceding
                  sentence at the time of the exercise of the Right, after
                  giving effect to any adjustments in the Purchase Price
                  pursuant to this Section 11 but subject to Section 11(a)(iii),
                  is referred to in this Agreement as the "Adjusted Exercise
                  Price.""

                           (m) The first two sentences of Section 11(a)(iii) of
         the Rights Agreement are hereby amended to read in their entirety as
         follows:

                               "(iii) In the event that the number of shares of
                  Common Stock which are authorized by the Company's Articles of
                  Incorporation,




                                       7


                  but which are not outstanding or reserved for issuance for
                  purposes other than upon exercise of the Rights, are not
                  sufficient to permit the exercise in full of the Rights in
                  accordance with the foregoing subparagraph (ii) of this
                  Section 11(a), the Company shall: (A) determine the value of
                  the Adjustment Shares issuable upon the exercise of a Right
                  (the "Current Value"), and (B) with respect to each Right
                  (subject to Section 7(e) hereof), make adequate provision to
                  substitute for the Adjustment Shares, upon the exercise of a
                  Right and payment of the Adjusted Exercise Price, (1) cash,
                  (2) a reduction in the Adjusted Exercise Price, (3) Common
                  Stock or other equity securities of the Company (including,
                  without limitation, shares, or units of shares, of preferred
                  stock which the Board has deemed to have essentially the same
                  value or economic rights as shares of Common Stock (such
                  shares of preferred stock being referred to as "Common Stock
                  Equivalents")), (4) debt securities of the Company, (5) other
                  assets, or (6) any combination of the foregoing, having an
                  aggregate value equal to the Current Value (less the amount of
                  any reduction in the Adjusted Exercise Price), where such
                  aggregate value has been determined by the Board based upon
                  the advice of a nationally recognized investment banking firm
                  selected by the Board; provided, however, that if the Company
                  shall not have made adequate provision to deliver value
                  pursuant to clause (B) above within thirty (30) days following
                  the later of (x) the first occurrence of a Section 11(a)(ii)
                  Event and (y) the date on which the Company's right of
                  redemption pursuant to Section 23(a) expires (the later of (x)
                  and (y) being referred to herein as the "Section 11(a)(ii)
                  Trigger Date"), then the Company shall be obligated to
                  deliver, upon the surrender for exercise of a Right and
                  without requiring payment of the Adjusted Exercise Price,
                  shares of Common Stock (to the extent available) and then, if
                  necessary, cash, which shares and/or cash have an aggregate
                  value equal to the Spread. For purposes of the preceding
                  sentence, the term "Spread" shall mean the excess of (i) the
                  Current Value over (ii) the Adjusted Exercise Price."

                           (n) Section 11(f) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(f) If as a result of an adjustment made
                  pursuant to Section 11(a)(ii) or Section 13(a) hereof, the
                  holder of any Right thereafter exercised shall become entitled
                  to receive any shares of capital stock other than Common
                  Stock, thereafter the number of such other shares so
                  receivable upon exercise of any Right and the Purchase Price
                  thereof shall be subject to adjustment from time to time in a
                  manner and on terms as nearly equivalent as practicable to the
                  provisions with respect to the Common Stock contained in
                  Sections 11(a), (b), (c), (e), (g), (h), (i), (j), (k) and
                  (m), and the provisions of Sections 7, 9, 10, 13 and 14 hereof
                  with




                                       8


                  respect to the Common Stock shall apply on like terms to any
                  such other shares; provided, however, that the Company shall
                  not be liable for its inability to reserve and keep available
                  for issuance upon exercise of the Rights pursuant to Section
                  11(a)(ii) a number of shares of Common Stock greater than the
                  number then authorized by the Company's Articles of
                  Incorporation but not outstanding or reserved for other
                  purposes."

                           (o) Section 11(h) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(h) Unless the Company shall have exercised its
                  election as provided in Section 11(i), upon each adjustment of
                  the Purchase Price as a result of the calculations made in
                  Sections 11(b) and (c), each Right outstanding immediately
                  prior to the making of such adjustment shall thereafter
                  evidence the right to purchase, at the adjusted Purchase
                  Price, that number of one-tenths of a share of Common Stock
                  (calculated to the nearest one ten-thousandth) obtained by (i)
                  multiplying (x) the number of one-tenths of a share covered by
                  a Right immediately prior to this adjustment, by (y) the
                  Purchase Price in effect immediately prior to such adjustment
                  of the Purchase Price, and (ii) dividing the product so
                  obtained by the Purchase Price in effect immediately after
                  such adjustment of the Purchase Price."

                           (p) The first two sentences of Section 11(i) of the
         Rights Agreement are hereby amended to read in their entirety as
         follows:

                               "(i) The Company may elect on or after the date
                  of any adjustment of the Purchase Price to adjust the number
                  of Rights, in lieu of any adjustment in the number of
                  one-tenths of a share of Common Stock purchasable upon the
                  exercise of a Right. Each of the Rights outstanding after the
                  adjustment in the number of Rights shall be exercisable for
                  the number of one-tenths of a share of Common Stock for which
                  a Right was exercisable immediately prior to such adjustment."

                           (q) Section 11(j) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(j) Irrespective of any adjustment or change in
                  the Purchase Price or the number of one-tenths of a share of
                  Common Stock issuable upon the exercise of the Rights, the
                  Rights Certificates theretofore and thereafter issued may
                  continue to express the Purchase Price per one-tenth of a
                  share and the number of one-tenths of a share which were
                  expressed in the initial Rights Certificates issued
                  hereunder."



                                       9


                           (r) Section 11(k) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(k) Before taking any action that would cause an
                  adjustment reducing the Purchase Price below the then stated
                  value, if any, of the number of one-tenths of a share of
                  Common Stock issuable upon exercise of the Rights, the Company
                  shall take any corporate action which may, in the opinion of
                  its counsel, be necessary in order that the Company may
                  validly and legally issue fully paid and nonassessable such
                  number of one-tenths of a share of Common Stock at such
                  adjusted Purchase Price."

                           (s) Section 13(a) of the Rights Agreement is hereby
         amended to read in its entirety as follows:

                               "(a) In the event that, following the Stock
                  Acquisition Date, directly or indirectly, (x) the Company
                  shall consolidate with, or merge with and into, any other
                  Person (other than a Subsidiary of the Company in a
                  transaction which complies with Section 11(o) here-of), and
                  the Company shall not be the continuing or surviving
                  corporation of such consolidation or merger, (y) any Person
                  (other than a Subsidiary of the Company in a transaction which
                  complies with Section 11(o) hereof) shall consolidate with, or
                  merge with or into, the Company, and the Company shall be the
                  continuing or surviving corporation of such consolidation or
                  merger and, in connection with such consolidation or merger,
                  all or part of the outstanding shares of Common Stock shall be
                  changed into or exchanged for stock or other securities of any
                  other Person or cash or any other property, or (z) the Company
                  shall sell or otherwise transfer (or one or more of its
                  Subsidiaries shall sell or otherwise transfer), in one
                  transaction or a series of related transactions, assets, cash
                  flow or earning power aggregating more than 50% of the assets,
                  cash flow or earning power of the Company and its Subsidiaries
                  (taken as a whole) to any Person or Persons (other than the
                  Company or any Subsidiary of the Company in one or more
                  transactions each of which complies with Section 11(o)
                  hereof), then, and in each such case (except as may be
                  contemplated by Section 13(d) hereof), proper provision shall
                  be made so that: (i) each holder of a Right, except as
                  provided in Section 7(e) hereof, shall thereafter have the
                  right to receive, upon the exercise thereof at the then
                  current Adjusted Exercise Price in accordance with the terms
                  of this Agreement, such number of validly authorized and
                  issued, fully paid, non-assessable and freely tradeable shares
                  of Common Stock of the Principal Party (as such term is
                  hereinafter defined), not subject to any liens, encumbrances,
                  rights of first refusal or other adverse claims, as shall be
                  equal to the result



                                       10


                  obtained by (1) multiplying the then current Adjusted Exercise
                  Price by the number of one-tenths of a share of Common Stock
                  for which a Right is exercisable immediately prior to the
                  first occurrence of a Section 13 Event (or, if a Section
                  11(a)(ii) Event has occurred prior to the first occurrence of
                  a Section 13 Event, multiplying the number of such one-tenths
                  of a share for which a Right was exercisable immediately prior
                  to the first occurrence of a Section 11(a)(ii) Event by the
                  Adjusted Exercise Price), and dividing that product by (2) 50%
                  of the Current Market Price (determined pursuant to Section
                  11(d) hereof) per share of the Common Stock of such Principal
                  Party on the date of consummation of such Section 13 Event;
                  (ii) such Principal Party shall thereafter be liable for, and
                  shall assume, by virtue of such Section 13 Event, all the
                  obligations and duties of the Company pursuant to this
                  Agreement; (iii) the term "Company" shall thereafter be deemed
                  to refer to such Principal Party, it being specifically
                  intended that the provisions of Section 11 hereof shall apply
                  only to such Principal Party following the first occurrence of
                  a Section 13 Event; (iv) such Principal Party shall take such
                  steps (including, but not limited to, the reservation of a
                  sufficient number of shares of its Common Stock) in connection
                  with the consummation of any such transaction as may be
                  necessary to assure that the provisions hereof shall
                  thereafter be applicable, as nearly as reasonably may be, in
                  relation to its shares of Common Stock thereafter deliverable
                  upon the exercise of the Rights; and (v) the provisions of
                  Section 11(a)(ii) hereof (except the provisions setting forth
                  the procedure for determining the Adjusted Exercise Price)
                  shall be of no effect following the first occurrence of any
                  Section 13 Event."

                           (t) The first sentence of Section 22 of the Rights
         Agreement is hereby amended to read in its entirety as follows:

                               "Notwithstanding any of the provisions of this
                  Agreement or of the Rights to the contrary, the Company may,
                  at its option, issue new Rights Certificates evidencing Rights
                  in such form as may be approved by the Board to reflect any
                  adjustment or change in the Purchase Price or the Adjusted
                  Exercise Price and the number or kind or class of shares or
                  other securities or property purchasable under the Rights
                  Certificates made in accordance with the provisions of this
                  Agreement."

                           (u) The address of the Rights Agent in Section 25 of
         the Rights Agreement is hereby amended to read in its entirety as
         follows:

                                    EquiServe Trust Company, N.A.
                                    150 Royall Street
                                    Canton, MA  02021



                                       11


                           (v) Exhibit A to the Rights Agreement, the Form of
         Rights Certificate, is hereby amended as follows:

                           i.  The second paragraph of Exhibit A (Form of Rights
                               Certificate) is hereby amended to read in its
                               entirety as follows:

                               " This certifies that _____________________, or
                           registered assigns, is the registered owner of the
                           number of Rights set forth above, each of which
                           entitles the owner thereof, subject to the terms,
                           provisions and conditions of the Rights Agreement,
                           dated as of November 12, 1997, as amended (the
                           "Rights Agreement"), between Atmos Energy
                           Corporation, a Texas and Virginia corporation (the
                           "Company"), and EquiServe Trust Company, N.A., a
                           national association with its principal place of
                           business in Massachusetts (the "Rights Agent"), to
                           purchase from the Company at any time prior to 5:00
                           P.M. (Boston, Massachusetts time) on May 10, 2008
                           (unless such date is extended prior thereto by the
                           Board of Directors) at the office or offices of the
                           Rights Agent designated for such purpose, or its
                           successors as Rights Agent, one-tenth of one fully
                           paid, non-assessable share of Common Stock of the
                           Company, no par value, at a purchase price of $8.00
                           per one-tenth of one share (the "Purchase Price"),
                           upon presentation and surrender of this Rights
                           Certificate with the Form of Election to Purchase and
                           related Certificate duly executed. All capitalized
                           terms which are not defined herein shall have the
                           meanings ascribed to them in the Rights Agreement.
                           The number of Rights evidenced by this Rights
                           Certificate (and the number of one-tenths of a share
                           of Common Stock which may be purchased upon exercise
                           thereof) set forth above, and the Purchase Price per
                           share set forth above, are the number and Purchase
                           Price as of February 13, 2002, based on the Common
                           Stock as constituted at such date. The Company
                           reserves the right to require prior to the occurrence
                           of a Triggering Event that a number of Rights be
                           exercised so that only whole shares of Common Stock
                           will be issued."

                           ii. The first sentence of the sixth paragraph of
                               Exhibit A (Form of Rights Certificate) is
                               hereby amended to read in its entirety as
                               follows:



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                               " This Rights Certificate, with or without other
                           Rights Certificates, upon surrender at the principal
                           office or offices of the Rights Agent designated for
                           such purpose, may be exchanged for another Rights
                           Certificate or Rights Certificates of like tenor and
                           date evidencing Rights entitling the holder to
                           purchase a like aggregate number of one-tenths of a
                           share of Common Stock as the Rights evidenced by the
                           Rights Certificate or Rights Certificates surrendered
                           shall have entitled such holder to purchase."

                           iii. The eighth paragraph of Exhibit A (Form of
                                Rights Certificate) is hereby amended to read in
                                its entirety as follows:

                                "No fractional shares of Common Stock will be
                           issued upon the exercise of any Right or Rights
                           evidenced hereby, if in lieu thereof a cash payment
                           is made, as provided in the Rights Agreement."

                           (w) Exhibit A to the Rights Agreement, the Form of
         Election to Purchase, is hereby amended as follows:

                           i.   The first paragraph of Exhibit A (Form of
                                Election to Purchase) is hereby amended to read
                                in its entirety as follows:

                                "The undersigned hereby irrevocably elects to
                           exercise _______________ Rights represented by this
                           Rights Certificate to purchase the number of
                           one-tenths of a share of Common Stock issuable upon
                           the exercise of the Rights (or such other securities
                           of the Company or of any other person which may be
                           issuable upon the exercise of the Rights) and
                           requests that certificates for such shares be issued
                           in the name of and delivered to:"

                           (x) Exhibit B to the Rights Agreement, the Summary of
         Rights to Purchase Common Stock, is hereby amended as follows:


                           i.   The second sentence of the first paragraph of
                                Exhibit B is hereby amended to read in its
                                entirety as follows:

                                "Each Right entitles the registered holder to
                           purchase from the Company one-tenth of a share of
                           Common Stock at a Purchase Price of $8.00 per share,
                           subject to adjustment."



                                       13


                           ii.  The first sentence of the sixth paragraph of
                                Exhibit B is hereby amended to read in its
                                entirety as follows:

                                "In the event that the Board of Directors
                           determines that a person is an Adverse Person or a
                           person becomes an Acquiring Person (except pursuant
                           to an offer for all outstanding shares of Common
                           Stock which the independent directors, who are not
                           associated with an Acquiring Person, determine to be
                           fair to shareholders and otherwise in the best
                           interests of the Company and its shareholders (a
                           "Qualified Offer")), each holder of a Right will
                           thereafter have the right to receive, upon exercise
                           of the Right at an exercise price equal to ten times
                           the Purchase Price multiplied by the number of
                           one-tenths of a share of Common Stock subject to the
                           Right immediately before such time (the "Adjusted
                           Exercise Price"), that number of shares of Common
                           Stock (or, in certain circumstances, cash, property
                           or other securities of the Company) having a value
                           equal to two times the Adjusted Exercise Price of the
                           Right."

                           iii. The first sentence of the seventh paragraph of
                                Exhibit B is hereby amended to read in its
                                entirety as follows:

                                "For example, at a Purchase Price of $8.00 per
                           Right, each Right not owned by an Acquiring Person or
                           Adverse Person (or by certain related parties)
                           following an event set forth in the preceding
                           paragraph would entitle its holder to purchase $160
                           worth of Common Stock (or other consideration, as
                           noted above) for $80."

                           iv.  The first sentence of the eighth paragraph of
                                Exhibit B is hereby amended to read in its
                                entirety as follows:

                                "In the event that, at any time following the
                           Stock Acquisition Date, (i) the Company engages in a
                           merger or other business combination transaction in
                           which the Company is not the surviving corporation,
                           (ii) the Company engages in a merger or other
                           business combination transaction in which the Company
                           is the surviving corporation and the Common Stock of
                           the Company is changed or exchanged or (iii) 50% or
                           more of the Company's assets, cash flow or earning
                           power is sold or transferred, each holder of a Right
                           (except Rights which previously have been voided as
                           set forth above) shall thereafter have the right to
                           receive, upon exercise of the Right at the Adjusted
                           Exercise Price, common stock



                                       14


                           of the acquiring company having a value equal to two
                           times the Adjusted Exercise Price of the Right."

                           v.   The ninth paragraph of Exhibit B is hereby
                                amended to read in its entirety as follows:

                                "The Purchase Price or Adjusted Exercise Price
                           payable, and the number of shares of Common Stock 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 Common Stock, (ii) if
                           holders of the Common Stock are granted certain
                           rights or warrants to subscribe for Common Stock or
                           convertible securities at less than the current
                           market price of the Common Stock or (iii) upon the
                           distribution to holders of the Common Stock of
                           evidences of indebtedness or assets (excluding
                           regular quarterly cash dividends) or of subscription
                           rights or warrants (other than those referred to
                           above)."

                           vi.  The second sentence of the tenth paragraph of
                                Exhibit B is hereby amended to read in its
                                entirety as follows:

                                "No fractional shares are required to be issued
                           and, in lieu thereof, an adjustment in cash may be
                           made based on the market price of the Common Stock on
                           the last trading date prior to the date of exercise."

         2. Except as amended by this Second Amendment, the Rights Agreement
shall continue in full force and effect as originally executed and delivered.

         3. Any reference in the Rights Agreement to the "Agreement" shall refer
to the Rights Agreement as amended by this Second Amendment.

         4. All capitalized terms used herein and not otherwise defined shall
have the meanings assigned to those terms in the Rights Agreement.

         5. This Second Amendment shall be governed and construed in accordance
with the laws of the State of Texas.

         6. This Second Amendment may be executed in any number of counterparts
and each of such counterparts shall for all purposes be deemed to be an
original, and all such counterparts shall together constitute by one and the
same instrument.



                                       15


                  IN WITNESS WHEREOF, the parties have executed this Second
Amendment as of the date written above.



Attest:                                     ATMOS ENERGY CORPORATION



By:  /s/ SHIRLEY A. HINES                   By: /s/ LOUIS P. GREGORY
     --------------------------------           --------------------------------
     Name:  Shirley A. Hines                    Name:  Louis P. Gregory
     Title: Corporate Secretary                 Title: Senior Vice President
                                                       and General Counsel



Attest:                                     EQUISERVE TRUST COMPANY, N.A.




By: /s/ ERIKA ILLINGWORTH                   By: /s/ JOSHUA P. MCGINN
     --------------------------------           --------------------------------
     Name:  Erika Illingworth                   Name:  Joshua P. McGinn
     Title: Account Manager                     Title: Senior Account Manager





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