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): April 3, 1998 ---------------------------- QUICKTURN DESIGN SYSTEMS, INC. - -------------------------------------------------------------------------------- (Exact name of registrant as specified in its charter) Delaware 0-22738 77-0159619 - -------------------------------------------------------------------------------- (State or other (Commission (IRS Employer jurisdiction of File Number) Identification Number) incorporation) 55 W. TRIMBLE ROAD, SAN JOSE, CALIFORNIA 95131-1013 - -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (408) 914-6000 --------------------------- N/A - -------------------------------------------------------------------------------- (Former name or former address, if changed since last report) ITEM 5. OTHER EVENTS On April 3, 1998, the Registrant announced preliminary financial results for the first quarter of 1998. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (c) EXHIBITS 99.1 Press Release dated April 3, 1998. -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 hereunto duly authorized. Dated: April 3, 1998 QUICKTURN DESIGN SYSTEMS, INC. /s/ RAYMOND K. OSTBY ------------------------------- Raymond K. Ostby Vice President, Finance and Administration, Chief Financial Officer and Secretary -3- INDEX TO EXHIBITS Exhibit Number Description of Document ------ ----------------------- 99.1 Press Release dated April 3, 1998.