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): September 2, 2003 THERMOGENESIS CORP. (Exact name of registrant as specified in its charter) Delaware 0-16375 94-3018487 -------- ------- ---------- (State or other jurisdiction (Commission (I.R.S. Employer of incorporation File Number) Identification No.) or organization) 2711 Citrus Road Rancho Cordova, California 95742 (916) 858-5100 (Address and telephone number of principal executive offices) Item 5. Other Events and Regulation FD Disclosure. ThermoGenesis Corp. (the "Company") has accepted the resignation of Sam Acosta, who served as Vice President of Manufacturing Operations since December 1997. Mr. Acosta, whose contract would have expired in December 2003, has departed as of September 2, 2003 to pursue other business interests. The Company is currently working on a plan of transition. As part of that transition, the Company is refining its operating structure for greater efficiency, which includes the elimination of the position of Vice President of Manufacturing Operations. Mr. Acosta's former duties will be distributed among other current members of the Company's operations team. SIGNATURE 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. THERMOGENESIS CORP., a Delaware corporation Dated: September 9, 2003 /s/Renee M. Ruecker ---------------------------------- Renee M. Ruecker, Chief Financial Officer