SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A AMENDMENT NO. 1 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 - For the fiscal year ended December 31, 2003 Commission file number 1-640 NL INDUSTRIES, INC. ------------------------------------------------------------------------------- (Exact name of Registrant as specified in its charter) New Jersey 13-5267260 (State or other jurisdiction of (IRS Employer incorporation or organization) Identification No.) 5430 LBJ Freeway, Suite 1700, Dallas, Texas 75240-2697 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (972) 233-1700 Securities registered pursuant to Section 12(b) of the Act: Name of each exchange on Title of each class which registered Common stock New York Stock Exchange ($.125 par value) Pacific 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 and (2) has been subject to such filing requirements for the past 90 days. Yes X No --- --- Indicate by check mark if 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 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. Indicate by check mark whether the Registrant is an accelerated filer (as defined in Rule 12b-2 of the Securities Exchange Act). Yes X No --- --- The aggregate market value of the 7.2 million shares of voting stock held by nonaffiliates of NL Industries, Inc. as of June 30, 2003 (the last business day of the Registrant's most recently-completed second fiscal quarter) approximated $122.5 million. As of February 27, 2004, 48,262,284 shares of the Registrant's common stock were outstanding. Documents incorporated by reference The information required by Part III is incorporated by reference from the Registrant's definitive proxy statement to be filed with the Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this report. The undersigned Registrant hereby amends the following items, financial statements, exhibits or other portions of its Annual Report on Form 10-K for the year ended December 31, 2003 as set forth below and in the pages attached hereto: Item 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K. Item No. Exhibit Index 31.1 Certification 31.2 Certification 99.1 Annual Report of the NL Industries, Inc. Retirement Savings Plan on Form 11-K for the year ended December 31, 2003. SIGNATURE 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. NL INDUSTRIES, INC. (Registrant) Dated: June 29, 2004 By: /s/Gregory M. Swalwell --------------------------- Gregory M. Swalwell Vice President, Finance and Chief Financial Officer