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) February 23, 2000 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 (732) 980-4500 - -------------------------------------------------------------------------------- (Former name or former address, if changed since last report) Item 5. Other Events On February 23, 2000, Enzon, Inc. issued a press release, a copy of which is attached as Exhibit 99.1 and incorporated by reference herein. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits. (c) Exhibit 99.1 - Press Release dated February 23, 2000. 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: February 23, 2000 ENZON, INC. ---------------------- (Registrant) By: /S/KENNETH J. ZUERBLIS ---------------------- Kenneth J. Zuerblis Vice President, Finance and Chief Financial Officer