1 REGISTRATION NO. 333-6087 - -------------------------------------------------------------------------------- SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------------- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ---------------- CAYENNE SOFTWARE, INC. (FORMERLY BACHMAN INFORMATION SYSTEMS, INC.) (Exact name of registrant as specified in its charter) MASSACHUSETTS 04-2784044 (State or other jurisdiction of (IRS Employer incorporation or organization) Identification No.) ----------------- 8 NEW ENGLAND EXECUTIVE PARK BURLINGTON, MA 01803 (617) 273-9003 (Address, including zip code, and telephone number, including area code, of registrant's principal executive office) PETER J. BONI PRESIDENT AND CHIEF EXECUTIVE OFFICER CAYENNE SOFTWARE, INC. 8 NEW ENGLAND EXECUTIVE PARK BURLINGTON, MA 01803 (617) 273-9003 (Name, address, including zip code, and telephone number, including area code, of agent for service) ----------------- COPIES TO: David W. Walker, Esq. Foley, Hoag & Eliot One Post Office Square Boston, Massachusetts 02109 (617) 832-1000 ---------------- This filing contains 12 sequentially numbered pages - -------------------------------------------------------------------------------- 2 Registration Statement No. 333-6087 (the "Registration Statement") covered 4,850,000 shares of Common Stock, par value $.01 per share ("Common Stock"), of Cayenne Software, Inc. (formerly Bachman Information Systems, Inc.), a Massachusetts corporation ("Cayenne"), to be issued to holders of Common Stock of Cadre Technologies Inc. ("Cadre") in connection with the merger into Cadre of a subsidiary of Cayenne (the "Merger"), pursuant to an Agreement and Plan of Merger (the "Merger Agreement") that provided for the adjustment of the amount of Cayeene shares to be issued and the exchange ratio. The Merger was consummated on July 18, 1996. Pursuant to the Merger Agreement, the adjusted amount of Cayenne shares to be issued was determined to be 4,808,167, and the exchange ratio was determined to be 0.3088 Cayenne share for each outstanding share of Cadre. 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, Cayenne hereby removes from registration the shares of Cayene Common Stock in excess of 4,808,167. At the Closing, tax opinions in the forms previously filed as Exhibits 8.1 and 8.2 to the Registration Statement were delivered. Copies of the executed opinions are filed as Exhibits with this Amendment. -2- 3 PART II INFORMATION NOT REQUIRED IN PROSPECTUS ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES. (a) EXHIBITS 8.1 Tax opinion of Foley, Hoag & Eliot LLP, counsel to the Registrant, as delivered 8.2 Tax opinion of Testa, Hurwitz & Thibeault, counsel to Cadre, as delivered -3- 4 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 Town of Burlington, Massachusetts, on July 24, 1996. CAYENNE SOFTWARE, INC. By: Peter S. Boni, President and Chief Executive Officer By: /s/ Eugene J. DiDonato ----------------------------- Eugene J. DiDonato Vice President and General Counsel, Attorney-in-Fact -4-