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): May 5, 1999 ---------------------------------------- THERMO TERRATECH INC. (Exact name of Registrant as specified in its charter) Delaware 1-9549 04-2925807 (State or other (Commission (I.R.S. Employer jurisdiction of File Number) Identification Number) incorporation or organization) 81 Wyman Street Waltham, Massachusetts 02454-9046 (Address of principal executive offices) (Zip Code) (781) 622-1000 (Registrant's telephone number including area code) Item 5. Other Events On May 5, 1999, Thermo Electron Corporation ("Thermo Electron"), the Registrant's parent corporation, and the Registrant issued press releases stating that the Registrant may be merged into and become a wholly owned subsidiary of Thermo Electron. Public shareholders of the Registrant would receive shares of common stock of Thermo Electron in exchange for their shares of the common stock of the Registrant. In addition, the press releases discussed modifications to Thermo Electron's previously announced plan to merge ThermoRetec Corporation ("Retec") and The Randers Killam Group Inc. ("Randers"), each majority-owned, publicly traded subsidiaries of the Registrant, into the Registrant. Each of Randers and Retec may now be merged into and become wholly owned subsidiaries of Thermo Electron. Public shareholders of Randers and Retec would receive shares of common stock of Thermo Electron in exchange for their shares of the common stock of Randers and Retec, respectively. The completion of these transactions is subject to numerous conditions, including the establishment of prices and exchange ratios, confirmation of anticipated tax consequences, approval by the directors of each of the Registrant, Randers, and Retec, including the independent directors of such companies, negotiation and execution of definitive purchase and sale or merger agreements, clearance by the Securities and Exchange Commission of a registration statement and proxy materials regarding the proposed transactions, and, where appropriate, receipt of fairness opinions from investment banking firms. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits (a) Financial Statements of Business Acquired: not applicable. (b) Pro Forma Financial Information: not applicable. (c) Exhibits: not applicable. 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, thereunto duly authorized, on this 12th day of May, 1999. THERMO TERRATECH INC. By: /s/ Theo Melas-Kyraizi Theo Melas-Kyriazi Chief Financial Officer