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: December 2, 1998 Commission File Number: 0-18976 CELTRIX PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 94-3121462 (State or other jurisdiction (I.R.S. Employer Identification No.) of incorporation or organization) 3055 Patrick Henry Drive, Santa Clara, CA 95054-1815 (Address of principal executive offices and zip code) Registrant's Telephone Number: (408) 988-2500 2 Item 5. Other Events On December 2, 1998, Celtrix Pharmaceuticals, Inc., a Delaware corporation (the "Company") announced Celtrix's SomatoKine(R) Demonstrates Positive Effects In Patients Recovering From Hip Fractures Caused By Severe Osteoporosis. Further details regarding this announcement are contained in the Company's news release dated December 2, 1998, attached as exhibit hereto and incorporated by reference herein. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits (a) Exhibits Exhibit 21 Celtrix Pharmaceuticals, Inc. News Release dated December 2, 1998. 3 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. CELTRIX PHARMACEUTICALS, INC. (Registrant) Date: December 2, 1998 By: /s/ DONALD D. HUFFMAN ------------------------------------------- Donald D. Huffman Vice President, Finance & Administration Chief Financial Officer (Duly authorized principal financial and accounting officer.) 4 CELTRIX PHARMACEUTICALS, INC. INDEX TO EXHIBITS Exhibit Number - -------------- Exhibit 21 Celtrix Pharmaceuticals, Inc. Press Release dated December 2, 1998.