1 EXHIBIT 4.1 SECOND AMENDMENT TO RIGHTS AGREEMENT This Second Amendment to the Rights Agreement between Conoco Inc. (formerly known as Conoco Energy Company), a Delaware corporation (the "Company"), and First Chicago Trust Company of New York, a New York corporation (the "Rights Agent"), dated October 19, 1998, as amended October 20, 1998 (the "Rights Agreement"), is hereby adopted as of July 29, 1999. WHEREAS, the Company's Class A Common Stock and Class B Common Stock may be held either in certificated form or through book-entry accounts at the offices of the Company's transfer agent; and WHEREAS, the Rights Agreement currently provides only for certificated Common Stock. NOW, THEREFORE, pursuant to Section 26 of the Rights Agreement, the Rights Agreement is hereby amended as follows: 1. Section 3 of the Rights Agreement is hereby amended to read in its entirety as follows: "Section 3. Issuance of Rights Certificates. (a) Until the earlier of (i) the close of business on the tenth Business Day after the Stock Acquisition Date (or, if the tenth Business Day after the Stock Acquisition Date occurs before the Record Date, the close of business on the Record Date), or (ii) the close of business on the tenth Business Day (or such later date as the Board shall determine) after the date that a tender or exchange offer by 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) is first published or sent or given within the meaning of Rule 14d-2(a) of the General Rules and Regulations under the Exchange Act, if upon consummation thereof, such Person would become an Acquiring Person (the earlier of (i) and (ii) being herein referred to as the "Distribution Date"), (x) the Class A Rights and the Class B Rights, respectively, will be evidenced (subject to the provisions of paragraph (b) of this Section 3) by the certificates for the Class A Common Stock and the Class B Common Stock, respectively, registered in the names of the holders of such class of Common Stock (which certificates for such class of Common Stock shall be deemed also to be certificates for such Rights) or, for Common Stock registered in the names of the holders thereof and held in book-entry accounts at the offices of the Company's transfer agent, by such book-entry accounts, and not by separate Rights Certificates, and (y) the Rights will be transferable only in connection with the transfer of the underlying shares of Common Stock (including transfers to the Company). As soon as practicable after the Distribution Date, the Rights Agent will send by first-class, postage-prepaid mail, to each record holder of Class A Common Stock and Class B Common Stock, 1 2 respectively, as of the close of business on the Distribution Date, at the address of such holder shown on the records of the Company, one or more right certificates, in substantially the form of Exhibit B and C hereto, evidencing one Class A Right for each share of Class A Common Stock (a "Class A Rights Certificate") and one Class B Right for each share of Class B Common Stock (a "Class B Rights Certificate"), respectively, so held, subject to adjustment as provided herein. In the event that any adjustment in the number of Rights per share of Common Stock has been made pursuant to Section 11(p) hereof, at the time of distribution of the Rights Certificates, the Company shall make the necessary and appropriate rounding adjustments (in accordance with Section 14(a) hereof) so that Rights Certificates representing only whole numbers of Rights are distributed and cash is paid in lieu of any fractional Rights. As of and after the Distribution Date, the Rights will be evidenced solely by such Rights Certificates. (b) The Company will make available, as promptly as practicable following the Record Date, a copy of a Summary of Rights, in substantially the form attached hereto as Exhibit C (the "Summary of Rights") to any holder of Rights who may so request from time to time prior to the Expiration Date. With respect to the Class A Common Stock and the Class B Common Stock, respectively, outstanding as of the Record Date, or issued subsequent to the Record Date, unless and until the Distribution Date shall occur, the Class A Rights and the Class B Rights will be evidenced by certificates for such class of Common Stock or by the book-entry accounts at the offices of the Company's transfer agent, and the registered holders of the Common Stock shall also be the registered holders of the associated Rights. Until the earlier of the Distribution Date or the Expiration Date (as such term is defined in Section 7(a) hereof), the transfer of any shares of Common Stock in respect of which Rights have been issued shall also constitute the transfer of the Rights associated with such shares of Common Stock. (c) Rights shall be issued in respect of all shares of Common Stock which are issued (whether originally issued or from the Company's treasury) after the Record Date but prior to the earlier of the Distribution Date or the Expiration Date (including an issuance of Class A Common Stock upon the conversion, whether automatic or voluntary, of Class B Common Stock into Class A Common Stock (and for purposes of the foregoing, any deemed conversion of Class B Common Stock upon the transfer of such shares or otherwise shall be deemed to be an issuance of Class A Common Stock)). Certificates representing such shares of Class A Common Stock shall also be deemed to be certificates for the associated Class A Rights, and shall bear the following legend: This certificate also evidences and entitles the holder hereof to certain Class A Rights as set forth in the Rights Agreement between Conoco Inc. (the "Company") and First Chicago Trust Company of New York (the "Rights Agent") dated as of October 19, 1998 (the "Rights Agreement"), the terms of which are hereby incorporated herein by reference and a copy of which is on file at the principal offices of the 2 3 Company. Under certain circumstances, as set forth in the Rights Agreement, such Class A Rights will be evidenced by separate certificates and will no longer be evidenced by this certificate. The Company will mail to the holder of this certificate a copy of the Rights Agreement, as in effect on the date of mailing, without charge, promptly after receipt of a written request therefor. Under certain circumstances set forth in the Rights Agreement, Class A Rights issued to, or held by, any Person who is, was or becomes an Acquiring Person or any Affiliate or Associate thereof (as such terms are defined in the Rights Agreement), whether currently held by or on behalf of such Person or by any subsequent holder, may become null and void. Certificates representing such shares of Class B Common Stock shall also be deemed to be certificates for the associated Class B Rights, and shall bear the following legend: This certificate also evidences and entitles the holder hereof to certain Class B Rights as set forth in the Rights Agreement between Conoco Inc. (the "Company") and First Chicago Trust Company of New York (the "Rights Agent") dated as of October 19, 1998, as amended (the "Rights Agreement"), the terms of which are hereby incorporated herein by reference and a copy of which is on file at the principal offices of the Company. Under certain circumstances, as set forth in the Rights Agreement, such Class B Rights will be evidenced by separate certificates and will no longer be evidenced by this certificate. The Company will mail to the holder of this certificate a copy of the Rights Agreement, as in effect on the date of mailing, without charge, promptly after receipt of a written request therefor. Under certain circumstances set forth in the Rights Agreement, Class B Rights issued to, or held by, any Person who is, was or becomes an Acquiring Person or any Affiliate or Associate thereof (as such terms are defined in the Rights Agreement), whether currently held by or on behalf of such Person or by any subsequent holder, may become null and void. A book-entry account for shares of Class A Common Stock shall also be deemed to include the associated Class A Rights, and the stock distribution statement for such shares shall bear the following legend: Each share of Class A Common Stock entitles the holder to certain Class A Rights as set forth in a Rights Agreement between Conoco Inc. (the "Company") and First Chicago Trust Company of New York, dated as of October 19, 1998, as amended (the "Rights Agreement"), the terms of which are hereby incorporated herein by reference and a copy of which is on file at the principal offices of the Company. Under certain circumstances, as set forth in the Rights Agreement, such Class A Rights will be evidenced by separate certificates and will no longer be associated with shares of Class A Common Stock. The Company will mail to any beneficial holder of shares of Class A Common Stock a copy 3 4 of the Rights Agreement, as in effect on the date of mailing, without charge, promptly after receipt of a written request therefor. Under certain circumstances set forth in the Rights Agreement, Class A Rights issued to any Person who is, was or becomes an Acquiring Person or an Affiliate or Associate thereof (as such terms are defined in the Rights Agreement), whether currently held by or on behalf of such Person or by any subsequent holder, may become null and void. A book-entry account for shares of Class B Common Stock shall also be deemed to include the associated Class B Rights, and the stock distribution statement for such shares shall bear the following legend: Each share of Class B Common Stock entitles the holder to certain Class B Rights as set forth in a Rights Agreement between Conoco Inc. (the "Company") and First Chicago Trust Company of New York, dated as of October 19, 1998, as amended (the "Rights Agreement"), the terms of which are hereby incorporated herein by reference and a copy of which is on file at the principal offices of the Company. Under certain circumstances, as set forth in the Rights Agreement, such Class B Rights will be evidenced by separate certificates and will no longer be associated with shares of Class B Common Stock. The Company will mail to any beneficial holder of shares of Class B Common Stock a copy of the Rights Agreement, as in effect on the date of mailing, without charge, promptly after receipt of a written request therefor. Under certain circumstances set forth in the Rights Agreement, Class B Rights issued to any Person who is, was or becomes an Acquiring Person or an Affiliate or Associate thereof (as such terms are defined in the Rights Agreement), whether currently held by or on behalf of such Person or by any subsequent holder, may become null and void. Until the earlier of (i) the Distribution Date or (ii) the Expiration Date, the Rights associated with the Common Stock represented by such certificates or held in such book-entry accounts shall be evidenced by such certificates or such book-entry accounts alone and registered holders of Common Stock shall also be the registered holders of the associated Rights, and the transfer of any shares of Common Stock, whether by transfer of physical certificates or book-entry transfer, shall also constitute the transfer of the Rights associated with the Common Stock." 2. Section 12 is hereby amended to read in its entirety as follows: "Section 12. Certificate of Adjusted Purchase Price or Number of Shares. Whenever an adjustment is made as provided in Section 11 and Section 13 hereof, the Company shall (a) promptly prepare a certificate setting forth such adjustment and a brief statement of the facts accounting for such adjustment, (b) promptly file with the Rights Agent, and with each transfer agent for the Preferred Stock and the Common Stock, a copy of such certificate and (c) if a Distribution Date has occurred, mail a brief summary thereof to each holder of a Rights Certificate (or, if prior to the Distribution Date, to each registered holder of shares 4 5 of Common Stock). The Rights Agent shall be fully protected in relying on any such certificate and on any adjustment therein contained." 3. Section 16, paragraph (c) is hereby amended to read in its entirety as follows: (c) subject to Section 6(a) and Section 7(f) hereof, the Company and the Rights Agent may deem and treat the person in whose name a Rights Certificate is registered (or, prior to the Distribution Date, the person in whose name the associated Common Stock certificate is registered or the person listed as a registered holder of shares of Common Stock through a book-entry account at the offices of the Company's transfer agent) as the absolute owner thereof and of the Rights evidenced thereby (notwithstanding any notations of ownership or writing on the Rights Certificates or the associated Common Stock certificate made by anyone other than the Company or the Rights Agent) for all purposes whatsoever, and neither the Company nor the Rights Agent, subject to the last sentence of Section 7(e) hereof, shall be required to be affected by any notice to the contrary; and" 4. Section 18, paragraph (b) is hereby amended to read in its entirety as follows: "(b) The Rights Agent shall be protected and shall incur no liability for or in respect of any action taken, suffered or omitted by it in connection with its administration of this Agreement in reliance upon any Rights Certificate or certificate for Common Stock or for other securities of the Company or book-entry account records of the Company's transfer agent, instrument of assignment or transfer, power of attorney, endorsement, affidavit, letter, notice, direction, consent, certificate, statement, or other paper or document believed by it to be genuine and to be signed, executed and, where necessary, verified or acknowledged, by the proper Person or Persons." 5. Section 25 is hereby amended to read in its entirety as follows: "Section 25. Notices. Notices or demands authorized by this Agreement to be given or made by the Rights Agent or by the holder of any Rights Certificate to or on the Company shall be sufficiently given or made if sent by first-class mail, postage prepaid, addressed (until another address is filed in writing by the Rights Agent with the Company) as follows: Conoco Inc. 600 North Dairy Ashford Houston, Texas 77079 Attention: Corporate Secretary Subject to the provisions of Section 21, any notice or demand authorized by this Agreement to be given or made by the Company or by the holder of any Rights Certificate to or on the Rights Agent shall be sufficiently given or made if sent by first- 5 6 class mail, postage prepaid, addressed (until another address is filed in writing by the Rights Agent with the Company) as follows: First Chicago Trust Company of New York 525 Washington Blvd., Suite 4660 Jersey City, NJ 07310 Attention: Tenders and Exchanges Administration Notices or demands authorized by this Agreement to be given or made by the Company or the Rights Agent to the holder of any Rights Certificate (or, if prior to the Distribution Date, to the registered holder of shares of Common Stock) shall be sufficiently given or made if sent by first-class mail, postage prepaid, addressed to such holder at the address of such holder as shown on the registry books of the Company." 6. The first sentence of Section 26 is hereby amended to read as follows: "Prior to the Distribution Date, the Company and the Rights Agent shall, if the Company so directs, supplement or amend any provision of this Agreement without the approval of any registered holders of shares of Common Stock." 7. This Second Amendment to the Rights Agreement 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 but one and the same instrument. IN WITNESS WHEREOF, the parties hereto have caused this Second Amendment to the Rights Agreement to be duly executed as of the date first above written. CONOCO INC. FIRST CHICAGO TRUST COMPANY OF NEW YORK By: /s/ RICK A. HARRINGTON By: /s/ JOHN F. KEEGAN ----------------------------------- -------------------------------------- Name: Rick A. Harrington Name: John F. Keegan Title: Senior Vice President, Legal, Title: Assistant Vice President and General Counsel Consented to effective as of the date first above written: E. I. DU PONT DE NEMOURS AND COMPANY By: /s/ GARY M. PFEIFFER ------------------------------------ Name: Gary M. Pfeiffer Title: Senior Vice President, Finance, and Chief Financial Officer 6