-------------------------------------------------------------------------------- UNITED STATES 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): November 26, 2002 Commission File Exact Name of Registrant as Specified in its State of I.R.S. Employer Number Charter, Principal Office Address and Incorporation Identification No. Telephone Number ------------------ ----------------------------------------------- ------------------ ----------------------- 1-16827 Premcor Inc. Delaware 43-1851087 1700 East Putnam Avenue Suite 500 Old Greenwich, Connecticut 06870 (203) 698-7500 1-13514 Premcor USA Inc. Delaware 43-1495734 1700 East Putnam Avenue Suite 500 Old Greenwich, Connecticut 06870 (203) 698-7500 1-11392 The Premcor Refining Group Inc. Delaware 43-1491230 1700 East Putnam Avenue Suite 500 Old Greenwich, Connecticut 06870 (203) 698-7500 -------------------------------------------------------------------------------- Page 1 of 4 Item 5. Other Events On November 26, 2002, Premcor Inc. announced that it had executed a definitive agreement with The Williams Companies, Inc. for the purchase of the Williams Memphis, Tennessee refinery and related supply and distribution assets. A copy of Premcor Inc.'s press release making such announcement is attached hereto as Exhibit 99. Premcor Inc. owns all of the outstanding common stock of Premcor USA Inc., and Premcor USA Inc. owns all of the outstanding common stock of The Premcor Refining Group Inc. Page 2 of 4 SIGNATURE 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. Premcor Inc. Premcor USA Inc. The Premcor Refining Group Inc. (Co-Registrants) /s/ Dennis R. Eichholz ---------------------------------- Dennis R. Eichholz Controller (principal accounting officer and duly authorized officer) November 26, 2002 Page 3 of 4 Exhibit Index Exhibit No. Description 99 Press release dated as of November 26, 2002 Page 4 of 4