SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 ------------------ FORM 8K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 3, 2000 ------------------------------- QUINTUS CORPORATION - -------------------------------------------------------------------------------- (Exact name of Registrant as Specified in Charter) Delaware 77-0021612 - -------------------------------------------------------------------------------- (State or Other Jurisdiction (Commission File (IRS Employer of Incorporation) Number) Identification No.) 47212 MISSION FALLS COURT, FREMONT, CALIFORNIA 94539 - -------------------------------------------------------------------------------- (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code (510) 624-2800 ------------------------------- N/A - -------------------------------------------------------------------------------- (Former Name or Former Address, if Changed Since Last Report) Item 5. Other Events. On May 3,2000, the Registrant filed a prospectus supplement under Rule 424(b)(3) of the Securities Act of 1933, as amended, to the proxy statement/prospectus dated April 11, 2000 relating to the proposed merger of Mustang.com, Inc. into a subsidiary of the Registrant. A copy of the supplement to the proxy statement/prospectus is attached hereto as Exhibit 99.1. 2 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 thereunto duly authorized. QUINTUS CORPORATION By: /s/ Susan Salvesen -------------------------------- Name: Susan Salvesen Title: Chief Financial Officer May 3,2000 3