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 (Date of earliest event reported): February 13, 2003 IMMUNOMEDICS, INC. (Exact name of registrant as specified in its charter) Delaware 0-12104 61-1009366 (State or other (Commission (IRS Employer jurisdiction of File Number) Identification No.) incorporation) 300 American Road, Morris Plains, New Jersey 07950 (Address of principal executive offices) (zip code) Registrant's telephone number, including area code: (973) 605-8200 Not applicable (Former name or former address, if changed since last report) Item 7. Financial Statements and Exhibits (c) Exhibits 99.1 Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), dated February 13, 2003. Item 9. Regulation FD Disclosure On February 13, 2003, the Registrant filed its Quarterly Report on Form 10-Q for the quarter ended December 31, 2002 with the Securities and Exchange Commission. In connection with the filing of the Form 10-Q, attached hereto as an exhibit are certifications of the Registrant's Chief Executive Officer and Chief Financial Officer, as required by 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. These certifications are being furnished herewith solely to accompany the Form 10-Q, pursuant to 18 U.S.C. Section 1350, are not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and are not to be incorporated by reference into any of the Registrant's filings with the Securities and Exchange Commission, whether filed prior to or after the furnishing of these certifications, regardless of any general or specific incorporation language in any such filing. 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. IMMUNOMEDICS, INC. Date: February 13, 2003 /s/ Cynthia L. Sullivan ----------------------- Cynthia L. Sullivan President and Chief Executive Officer 3 EXHIBIT INDEX Exhibit Number Description - ------- ----------- 99.1 Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), dated February 13, 2003. 4