1 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) OCTOBER 15, 1997 DIAMOND MULTIMEDIA SYSTEMS, INC. ------------------------------------------------------ (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER) DELAWARE ---------------------------------------------- (STATE OR OTHER JURISDICTION OF INCORPORATION) 0-25580 77-0390654 --------------------- ------------------------------------ (COMMISSION FILE NO.) (I.R.S. EMPLOYER IDENTIFICATION NO.) 2880 JUNCTION AVENUE SAN JOSE, CALIFORNIA 95134 ---------------------------------------- (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (408) 325-7000 ---------------------------------------------------- (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE) 1 2 Item 8. Change in Fiscal Year On October 15, 1997, Diamond Multimedia Systems, Inc. determined to change its fiscal year end 1997. Previously, the year-end date was the last Sunday closest to the end of the last month of the calendar year. The date of the new 1997 fiscal year-end is December 31, 1997. The Form 10-K will be the report which covers the transition period. 2 3 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 hereunto duly authorized. DIAMOND MULTIMEDIA SYSTEMS, INC. Date: October 27, 1997 By: /s/ WILLIAM J. SCHROEDER ------------------------- William J. Schroeder President and Chief Executive Officer 3