As filed with the Securities and Exchange Commission on October 28, 1998 Registration No. 333-____________ ================================================================================ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 --------------- FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 --------------- THERMATRIX INC. (Exact name of registrant as specified in its charter) Delaware 94-2958515 -------- ---------- (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification Number) 2025 Gateway Place, Ste. 132 San Jose, California 95110 (408) 453-0490 (Address of Principal Executive Offices) --------------- Employee Stock Purchase Plan (Full titles of the plans) --------------- John T. Schofield President Thermatrix Inc. 2025 Gateway Place, Ste. 132 San Jose, California 95110 (Name and address of agent for service) (408) 453-0490 (Telephone number, including area code, of agent for service) --------------- Copies to: Michael J. Danaher, Esq. Wilson Sonsini Goodrich & Rosati Professional Corporation 650 Page Mill Road Palo Alto, California 94304 (650) 493-9300 CALCULATION OF REGISTRATION FEE ======================================================================================================== Proposed Proposed maximum maximum Amount offering aggregate Amount of Title of securities to be price offering registration to be registered registered per share price fee - -------------------------------------------------------------------------------------------------------- Common Stock (par value $0.001 per share) reserved for issuance pursuant to the Employee Stock Purchase Plan 100,000 $2.3906 (1) $239,060.00 $66.46 - -------------------------------------------------------------------------------------------------------- Total 100,000 $239,060.00 $66.46 ======================================================================================================= (1) Estimated in accordance with Rule 457(h) solely for the purpose of calculating the registration fee. The proposed maximum offering price per share was determined to be 85% of the fair market value of the Common Stock (the "FMV"), or, the average of the bid and ask price reported by the National Association of Securities Dealers Automated Quotation System on October 27, 1998. STATEMENT UNDER GENERAL INSTRUCTION AND REGISTRATION OF ADDITIONAL SECURITIES. Except as otherwise stated herein, the Registration Statement on Form S-8 pertaining to the Employee Stock Purchase Plan (File No. 333-12363) is hereby incorporated by reference into this Registration Statement. ITEM 8. EXHIBITS. Exhibit Number ------- 5.1 Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation with respect to the legality of the securities. 23.1 Consent of Wilson Sonsini Goodrich & Rosati, Professional Corporation (included in Exhibit 5.1). 23.2 Consent of Arthur Andersen LLP, Independent Accountants. 24.1 Power of Attorney (included in signature page hereof). II-1 SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant 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 Registration Statement to be signed on its behalf by the undersigned, thereunto, duly authorized, in the City of San Jose, State of California, on this 28th day of October, 1998. THERMATRIX INC. By: /s/ John T. Schofield --------------------------------------- John T. Schofield Chairman, President and Chief Executive Officer POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS that each person whose signature appears below constitutes and appoints, jointly and severally, John T. Schofield, and Daniel S. Tedone and each of them acting individually, as his attorney-in-fact, each with full power of substitution, for him in any and all capacities, to sign any and all amendments to this Registration Statement on Form S-8, and to file the same with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that each of said attorneys-in-fact, or any substitute, may do or cause to be done by virtue hereof. PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE CAPACITIES AND ON THE DATES INDICATED. SIGNATURE TITLE DATE - -------------------------------------- --------------------------------------- ---------------- /s/ John T. Schofield Chairman, President and Chief October 28, 1998 - -------------------------------------- Executive Officer (Principal Executive John T. Schofield Officer) /s/ Daniel S. Tedone Executive Vice President and Chief October 28, 1998 - -------------------------------------- Financial Officer (Principal Financial Daniel S. Tedone and Accounting Officer) /s/ Robi Blumenstein Director October 28, 1998 - -------------------------------------- Robi Blumenstein /s/ Joseph W. Sutton Director October 28, 1998 - -------------------------------------- Joseph W. Sutton /s/ Harry J. Healer, Jr. Director October 28, 1998 - -------------------------------------- Harry J. Healer, Jr. II-2 Director - ---------------------------------------- Charles R. Kokesh /s/ John M. Toups Director October 28, 1998 - ---------------------------------------- John M. Toups Director - ---------------------------------------- Frank R. Pope /s/ James M. Strock Director October 28, 1998 - ---------------------------------------- James M. Strock II-3 INDEX TO EXHIBITS Exhibit Number ------- 5.1 Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation with respect to the legality of the securities. 23.1 Consent of Wilson Sonsini Goodrich & Rosati, Professional Corporation (included in Exhibit 5.1). 23.2 Consent of Arthur Andersen LLP, Independent Accountants. 24.1 Power of Attorney (included in signature page hereof). ______________________