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) December 3, 1996 ENZON, INC. (Exact name of registrant as specified in its charter) Delaware 0-12957 22-237286 - ------------------------------------------------------------------- (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification) 20 Kingsbridge Road, Piscataway, New Jersey 08854 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code (908) 980-4500 (Former name or former address, if changed since last report)Item 5. Other Events Enzon, Inc. (the "Enzon" or the "Company") announced at the 1996 Annual Meeting of Shareholders that under Enzon's agreement with the Green Cross Corporation, a Japanese pharmaceutical company, for recombinant Human Serum Albumin, (rHSA) is currently in Phase III clinical trials in Japan as a blood volume expander. The market in Japan for rHSA is approximately $400 million. While the agreement entitles Enzon to a customary pharmaceutical royalty on product sales, Green Cross has requested reduction of the royalty. Enzon is considering all its options under the agreement. - 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: December 19, 1996 ENZON, INC. (Registrant) By: /S/KENNETH J.ZUERBLIS Kenneth J. Zuerblis Vice President, Finance and Chief Financial Officer