================================================================================ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 12, 2004 APACHE CORPORATION (Exact name of registrant as specified in Charter) DELAWARE 1-4300 41-0747868 (State or Other Jurisdiction (Commission (I.R.S. Employer of Incorporation) File Number) Identification Number) 2000 POST OAK BOULEVARD SUITE 100 HOUSTON, TEXAS 77056-4400 (Address of Principal Executive Offices) Registrant's telephone number, including area code: (713) 296-6000 ================================================================================

ITEM 5. OTHER EVENTS On January 12, 2004, Apache Corporation announced that its common stock would be dually listed for trading on the NASDAQ as well as the New York Stock Exchange, pending application approval by NASDAQ. Apache will continue to trade under its existing three-letter stock symbol "APA" on both exchanges. Apache's press release announcing the dual listing is attached hereto as Exhibit 99.1 and is incorporated herein by reference. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS (c) EXHIBITS. EXHIBIT NO. DESCRIPTION - ----------- ----------- 99.1* Press Release dated January 12, 2004, "Apache Dually Listing Its Common Stock on NASDAQ and NYSE." - ---------- * filed herewith 2

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. APACHE CORPORATION Date: January 12, 2004 /s/ Eric L. Harry -------------------------------------------- Eric L. Harry Vice President and Associate General Counsel 3

INDEX TO EXHIBITS EXHIBIT NO. DESCRIPTION - ----------- ----------- 99.1* Press Release dated January 12, 2004, "Apache Dually Listing Its Common Stock on NASDAQ and NYSE." - ---------- * filed herewith

Exhibit 99.1 CONTACTS: (MEDIA): TONY LENTINI (713/296-6227) BILL MINTZ (713/296-7276) (INVESTOR): ROBERT DYE (713) 296-6662 (WEB SITE): WWW.APACHECORP.COM FOR RELEASE AT 7:02 A.M. CENTRAL TIME APACHE DUALLY LISTING ITS COMMON STOCK ON NASDAQ AND NYSE HOUSTON, Jan. 12, 2004 - Apache Corporation (Ticker: APA) announced today that the company will be dually listing its common stock on NASDAQ as well as the New York Stock Exchange, pending application approval by NASDAQ. "Over the years, Apache has thrived on competition. We believe that it will be good for the exchanges as well, and therefore beneficial to shareholders," said G. Steven Farris, Apache president and chief executive officer. "After dual listing, investors will see the same consolidated stock price for Apache under its existing three-letter stock symbol, APA, on whichever quote service they use." In addition to Apache, NASDAQ has announced that Walgreens, HP, Countrywide Financial, Charles Schwab and Cadence are listing on both exchanges. Apache Corporation is a large oil and gas independent with core operations in the United States, Canada, the United Kingdom North Sea, Australia and Egypt. -end-