1 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): March 4, 2000 GELTEX PHARMACEUTICALS, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 0-26872 04-3136767 (State or Other Jurisdiction (Commission File Number) (I.R.S. Employer of Incorporation) Identification No.) 153 SECOND AVENUE, WALTHAM MASSACHUSETTS, 02451 (Address of principal executive office and zip code) Registrant's telephone number, including area code: (781) 290-5888 2 ITEM 5. OTHER EVENTS. The financial statements of GelTex Pharmaceuticals, Inc. (the "Company") at December 31, 1999 and 1998 and for each of the three years in the period ended December 31, 1999 together with the accompanying report of the Company's independent auditors dated February 22, 2000, filed as exhibit 99.1 to this report, are hereby incorporated by reference in this report. Page 2 3 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, on this 3rd day of March, 2000. GELTEX PHARMACEUTICALS, INC. By: /s/ Mark Skaletsky ------------------------------------- Mark Skaletsky President and Chief Executive Officer Date: March 3, 2000 Page 3 4 EXHIBIT INDEX EXHIBIT SEQUENTIAL NUMBER DESCRIPTION PAGE NUMBER - ------- ----------- ----------- 23.1 Consent of Ernst & Young LLP 23.2 Consent of PricewaterhouseCoopers LLP 99.1 GelTex Pharmaceuticals, Inc. Financial Statements at December 31, 1999 and 1998 and for each of the three years in the period ended December 31, 1999 and the report of independent auditors. Filed herewith. 99.2 RenaGel LLC Financial Statements for the years ended December 31, 1999 and 1998 and the period June 6, 1997 (Date of Inception) through December 31, 1997 and the report of independent accountants. Filed herewith. Page 4