UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 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 12, 2004 IONICS, INCORPORATED (Exact name of registrant as specified in its charter) Massachusetts 1-7211 04-2068530 (State of incorporation) (Commission File Number) (IRS Employer Identification No.) 65 Grove Street, Watertown, MA 02472 (617) 926-2500 (Address of principal executive offices) (Zip Code) (Registrant's telephone number, including area code) -2- Item 5. Other Events and Required FD Disclosure. On November 18, 2003, Ionics, Incorporated and the shareholders and members of Ecolochem, Inc. and its affiliated companies (collectively, the "Ecolochem Group") entered into a Purchase Agreement that provides for the acquisition by Ionics of the stock and membership interests of the Ecolochem Group for $200 million in cash and 4,905,660 shares of Ionics common stock, in each case subject to adjustment as provided in the Purchase Agreement. This report is being filed to disclose the unaudited combined financial statements of the Ecolochem Group as of December 31, 2003 and for the three months ended December 31, 2003 and 2002, which appear as Exhibit 99.1 to this report and are incorporated herein by this reference. Item 7. Financial Statements and Exhibits. (a) Financial Statements of Business Acquired. None. (b) Pro Forma Financial Information. None. (c) Exhibits. Exhibit Number Description - -------------- ----------- Exhibit 99.1 The following combined financial statements of the Ecolochem Group: Combined balance sheets as of December 31, 2003 (unaudited) and September 30, 2003 Combined statements of earnings for the three months ended ended December 31, 2003 and 2002 (unaudited) Combined statements of cash flows for the three months ended ended December 31, 2003 and 2002 (unaudited) Notes to combined financial statements -3- 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. IONICS, INCORPORATED February 12, 2004 By: /s/ Stephen Korn -------------------------------- Name: Stephen Korn Title: Vice President and General Counsel -4- EXHIBIT INDEX Exhibit Number Description - -------------- ----------- Exhibit 99.1 The following combined financial statements of the Ecolochem Group: Combined balance sheets as of December 31, 2003 (unaudited) and September 30, 2003 Combined statements of earnings for the three months ended ended December 31, 2003 and 2002 (unaudited) Combined statements of cash flows for the three months ended ended December 31, 2003 and 2002 (unaudited) Notes to combined financial statements