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 November 10, 1998 ------------------------ METRA BIOSYSTEMS, INC. (Exact name of registrant as specified in its charter) 0-26234 (Commission File Number) California 33-0408436 (State or other jurisdiction of (I.R.S. Employer Identification No.) incorporation or organization) 265 North Whisman Road Mountain View, CA 94043 (Address of principal executive offices, with zip code) (415) 903-9100 (Registrant's telephone number, including area code) Item 5. Other Events On November 4, 1998, Metra Biosystems, Inc., a California corporation (the "Company") announced that the Board of Directors of the Company approved an amendment of the Company's Preferred Shares Rights Agreement (the "Rights Agreement") dated as of August 21, 1996, as amended, to add additional terms and conditions to the definition of an Acquiring Person under the Rights Agreement. Further details regarding this announcement are contained in the Company's press release dated November 9, 1998 attached as an exhibit hereto and incorporated by reference herein. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits. (c) Exhibits. Exhibit 99 Metra Biosystems, Inc. Press Release dated November 9, 1998. 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. METRA BIOSYSTEMS, INC. Date: November 10, 1998 By: /s/ GEORGE W. DUNBAR, JR. ------------------------------------- George W. Dunbar, Jr. President, Chief Executive Officer & Chief Financial Officer METRA BIOSYSTEMS, INC. INDEX TO EXHIBITS Sequential Page Exhibit Number Description Number -------------- ----------- ------ 99 Press Release dated November 9, 1998