As filed with the Securities and Exchange Commission on March 2, 2006. Registration No. 33-52804 -------------------------------------------------------- SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 --------------- POST-EFFECTIVE AMENDMENT NO. 1 ON FORM S-8 Registration Statement Under The Securities Act of 1933 --------------- THERMO ELECTRON CORPORATION (Exact name of registrant as specified in its charter) --------------- DELAWARE 04-2209186 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification Number) 81 Wyman Street Waltham, Massachusetts 02454-9046 (Address of Principal Executive Offices) (Zip Code) THERMO CARDIOSYSTEMS INC. EMPLOYEES' STOCK PURCHASE PLAN (Full Title of the Plan) Seth H. Hoogasian, Secretary Thermo Electron Corporation 81 Wyman Street Waltham, Massachusetts 02454-9046 (781) 622-1000 (Telephone Number, Including Area Code, of Agent For Service) Deregistration of Securities This Post-Effective Amendment No. 1 on Form S-8 to the Registration Statement on Form S-8 (Registration No. 33-52804) is being filed by the Registrant to remove from registration any of the securities that remain unsold thereunder as of the date of filing of this post-effective amendment. The securities were previously registered for sale under the Thermo CardioSystems Inc. Employees' Stock Purchase Plan (the "Plan"). The deregistered securities represent shares that were available under the Plan which remain unsold as of the date of the filing of this post-effective amendment. As such, the Registrant hereby removes such securities from registration and the registration is hereby terminated. SIGNATURES Pursuant to the requirements of the Securities Act of 1933, Thermo Electron certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Post-Effective Amendment on Form S-8 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Waltham, Commonwealth of Massachusetts, on this 28th day of February, 2006. THERMO ELECTRON CORPORATION By: /s/ Marijn E. Dekkers ------------------------------------- Marijn E. Dekkers Its: President and Chief Executive Officer Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment on Form S-8 has been signed by the following persons in the capacities and on the dates indicated. Signature Title Date --------- ----- ---- President, Chief Executive /s/ Marijn E. Dekkers Officer and Director (Principal ------------------------------------------------------ Executive Officer) February 28, 2006 Marijn E. Dekkers /s/ Jim P. Manzi Chairman of the Board and ------------------------------------------------------ Director February 28, 2006 Jim P. Manzi Vice President and Chief /s/ Peter M. Wilver Financial Officer (Principal ------------------------------------------------------ Financial Officer) February 28, 2006 Peter M. Wilver Corporate Controller and Chief /s/ Peter E. Hornstra Accounting Officer (Principal ------------------------------------------------------ Accounting Officer) February 28, 2006 Peter E. Hornstra /s/ John L. LaMattina ------------------------------------------------------ Director February 28, 2006 John L. LaMattina /s/ Peter J. Manning ------------------------------------------------------ Director February 28, 2006 Peter J. Manning /s/ Robert A. McCabe ------------------------------------------------------ Director February 28, 2006 Robert A. McCabe /s/ Robert W. O'Leary ------------------------------------------------------ Director February 28, 2006 Robert W. O'Leary /s/ Michael E. Porter ------------------------------------------------------ Director February 28, 2006 Michael E. Porter /s/ Elaine S. Ullian ------------------------------------------------------ Director February 28, 2006 Elaine S. Ullian