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) JUNE 10, 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. ("Enzon" or the "Company") announced that it has exercised 150,000 warrants to purchase common stock of Neoprobe Corporation and sold the stock for a net profit of approximately $1 million, after payment to Neoprobe of the aggregate average exercise price of $10.50 per share. The warrants were part of the compensation Enzon received for licensing its Single-Chain Antigen-Binding (SCA(R)) protein technology to Neoprobe for use with Neoprobe's Radioimmunoguided Surgery (RIGS(R)) product under the license agreement originally signed in 1992. The warrants were due to expire in 1996. Enzon will also be entitled to receive additional payments per product upon the achievement of specified development milestones and royalties on sales of any future products developed by Neoprobe that utilize Enzon's SCA technology. 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: June 24, 1996 ENZON, INC. (Registrant) By: /s/KENNETH J. ZUERBLIS Kenneth J. Zuerblis Vice President, Finance and Chief Financial Officer