================================================================================ 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): JULY 29, 2004 LEXICON GENETICS INCORPORATED (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER) <Table> DELAWARE 000-30111 76-0474169 (STATE OR OTHER JURISDICTION OF (COMMISSION FILE NUMBER) (I.R.S. EMPLOYER INCORPORATION OR ORGANIZATION) IDENTIFICATION NUMBER) </Table> 8800 TECHNOLOGY FOREST PLACE THE WOODLANDS, TEXAS 77381 (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES AND ZIP CODE) (281) 863-3000 (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE) ================================================================================ ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits EXHIBIT NO. DESCRIPTION - ----------- ----------- 99.1 -- Press Release of Lexicon Genetics Incorporated dated July 29, 2004 ITEM 12. RESULTS OF OPERATIONS AND FINANCIAL CONDITION On July 29, 2004, we issued a press release to report our financial results for the quarter ended June 30, 2004. A copy of the press release is attached to this current report on Form 8-K as Exhibit 99.1. The information in this Form 8-K and the Exhibit attached to this Form 8-K shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934 (the "Exchange Act") or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such a filing. 2 SIGNATURES 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. LEXICON GENETICS INCORPORATED Date: July 29, 2004 By: /s/ JEFFREY L. WADE --------------------------------- Jeffrey L. Wade Executive Vice President and General Counsel 3 INDEX TO EXHIBITS EXHIBIT NO. DESCRIPTION - ----------- ----------- 99.1 -- Press Release of Lexicon Genetics Incorporated dated July 29, 2004