UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Year Ended December 31, 1999 Commission File No. 1-8968 ANADARKO PETROLEUM CORPORATION 17001 Northchase Drive, Houston, Texas 77060-2141 (281) 875-1101 Incorporated in the Employer Identification State of Delaware No. 76-0146568 Securities Registered Pursuant to Section 12(b) of the Act: Common Stock, par value $0.10 per share Preferred Stock Purchase Rights The above Securities are listed on the New York Stock Exchange. Securities Registered Pursuant to Section 12(g) of the Act: None Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes X No . Indicate by check mark if the disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ____. The aggregate market value of the voting stock held by non- affiliates of the registrant on January 31, 2000 was $4,170,371,000. The number of shares outstanding of the Company's common stock as of January 31, 2000 is shown below: Title of Class Number of Shares Outstanding Common Stock, par value $0.10 per share 128,015,103 Part of Form 10-K Documents Incorporated by Reference Part I Portions of the Anadarko Petroleum Corporation 1999 Annual Report to Stockholders. Part II Portions of the Anadarko Petroleum Corporation 1999 Annual Report to Stockholders. Part III Portions of the Proxy Statement, dated March 27, 2000, for the Annual Meeting of Stockholders of Anadarko Petroleum Corporation to be held April 27, 2000. Anadarko Petroleum Corporation amends its Annual Report on Form 10-K for the year ended December 31, 1999 to include the following exhibits: Part IV Item 14. Exhibits and Reports on Form 8-K Exhibit Number Description 23 Consent of KPMG LLP 99(b) Anadarko Employee Savings Plan Form 11-K for the year ended December 31, 1999 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this amendment to be signed on its behalf by the undersigned, thereunto duly authorized. ANADARKO PETROLEUM CORPORATION (Registrant) June 22, 2000 By: [Suzanne Suter] Suzanne Suter, Corporate Secretary