1 As filed with the Securities and Exchange Commission on September __, 1995 Registration No. 33-22929 ================================================================================ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------------- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ---------------- CABOT MEDICAL CORPORATION (Exact name of Registrant as specified in its charter) ---------------- NEW JERSEY 23-2240207 (State or other jurisdiction of (I.R.S. Employer incorporation of organization) Identification Number) 2150 CABOT BOULEVARD WEST LONGHORNE, PA 19047 (215) 752-8300 (Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices) ---------------- CABOT MEDICAL CORPORATION 1985 INCENTIVE STOCK OPTION PLAN (Full title of the Plans) ---------------- RICHARD A. AUHLL CHIEF EXECUTIVE OFFICER CABOT MEDICAL CORPORATION 2150 CABOT BOULEVARD WEST LONGHORNE, PA 19047 (215) 752-8300 (Name, address, including zip code, and telephone number, including area code, of agent for service) ---------------- Copy to: ROBERT B. JACK, ESQ. WILSON, SONSINI, GOODRICH & ROSATI PROFESSIONAL CORPORATION 650 PAGE MILL ROAD PALO ALTO, CA 94304-1050 (415) 493-9300 FAX: (415) 496-4088 ================================================================================ 2 Registration Statement No. 33-22929 (the "Registration Statement") covered 448,000 of common stock, no par value ("Cabot Common Stock"), of Cabot Medical Corporation, a New Jersey corporation ("Cabot"), consisting of shares issuable pursuant to the following plan on a delayed or continuous basis: the Cabot Medical Corporation 1985 Incentive Stock Option Plan (the "Plan"). On August 28, 1995, pursuant to the terms of an Amended and Restated Agreement and Plan of Reorganization, dated as of July 10, 1995 (the "Merger Agreement"), by and among Circon Corporation ("Circon"), Circon Sub Corp. and Cabot, Cabot became a wholly-owned subsidiary of Circon and each share of Cabot Common Stock (other than dissenters' shares and shares owned by Circon Sub Corp., Circon or any direct or indirect wholly-owned subsidiary of Circon or Cabot) was converted into 0.415 shares of Circon Common Stock and all outstanding options under the Plan were assumed by Circon, so that all such options are now exercisable for shares of Circon Common Stock. In connection with this transaction, Cabot has filed a Certification and Notice of Termination of Registration under 12(g) of the Securities Exchange Act of 1934 to terminate the registration of Cabot Common Stock. Pursuant to Rule 478 promulgated under the Securities Act of 1933, as amended (the "Act") and the undertaking contained in the Registration Statement pursuant to Item 512(a)(3) of Regulation S-K under the Act, Cabot hereby removes from registration the shares of Cabot Common Stock that remain unsold as of the date hereof. 3 SIGNATURE Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant has duly caused this Post-Effective Amendment No. 1 to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Santa Barbara, California, on September 1, 1995 CABOT MEDICAL CORPORATION By: /S/ RICHARD A. AUHLL ----------------------------------------- Richard A. Auhll Chief Executive Officer