1 SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ------------- FORM 8-K CURRENT REPORT Pursuant to Selection 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 11, 1996 ----------------------------- QUIDEL CORPORATION - -------------------------------------------------------------------------------- (Exact name of registrant as specified in its charter) Delaware 0-10961 94-2573850 - -------------------------------------------------------------------------------- (State or other (Commission (IRS Employer jurisdiction of File Number) Identification No.) incorporation) 10165 McKellar Court San Diego, California 92121 - -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code (619) 552-1100 ------------------------------ N/A - -------------------------------------------------------------------------------- (Former name or former address, if changed since last report) 2 This Report is filed pursuant to Item 5 of Form 8-K to report the adoption of a stockholder rights plan by Quidel Corporation. Pursuant to General Instruction F of Form 8-K, the following documents are incorporated by reference herein and attached as exhibits hereto: EXHIBIT DESCRIPTION ------- ----------- 1 Summary of the Rights issued pursuant to the Rights Agreement dated as of December 31, 1996 between Quidel Corporation and American Stock Transfer & Trust Company, as Rights Agent. 2 Quidel Corporation press release of December 20, 1996 regarding approval by Quidel Corporation's board of directors of the adoption of a stockholder rights plan. 3 Form of letter to be sent to stockholders announcing the adoption of a stockholder rights plan and transmitting a summary of the rights. 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. Date: January 8, 1997 QUIDEL CORPORATION By: /s/ STEVEN C. BURKE ---------------------------------- Steven C. Burke Vice President-Finance and Administration and Chief Financial Officer