As filed with the Securities and Exchange Commission on April 5, 2000 Registration No. 333- 91377 ================================================================================ 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 _____________________ Stamps.com Inc. (Exact name of Registrant as specified in its charter) Delaware 5961 77-0454966 (State or other jurisdiction of (Primary Standard Industrial (I.R.S. Employer of incorporation or organization) Classification Code No.) Identification Number) 3420 Ocean Park Boulevard, Suite 1040 Santa Monica, California 90405 (310) 581-7200 (Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices) _____________________ John M. Payne Chairman and Chief Executive Officer Stamps.com Inc. 3420 Ocean Park Boulevard, Suite 1040 Santa Monica, California 90405 (310) 581-7200 (Name, address, including zip code, and telephone number, including area code, of agent for service) _____________________ _____________________ Copies to: Bruce R. Hallett Craig E. Sherman Brobeck, Phleger & Harrison LLP David R. Young 38 Technology Drive David T. Sobota Irvine, California 92618 Venture Law Group (949) 790-6300 A Professional Corporation 4750 Carillon Point Kirkland, Washington 98033 (425) 739-8700 _____________________ _____________________ Approximate date of commencement of proposed sale to the public: Not applicable. _____________________ If any of the securities being registered on this form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box. [_] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [_] If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [_] _____________________ The Registrant hereby de-registers 1,627,852 shares of common stock, par value $.001 per share, of Stamps.com Inc., a Delaware corporation ("Stamps"), which were not sold in connection with the merger (the "Merger") of Rocket Acquisition Corp., a Washington corporation and a wholly owned subsidiary of Stamps, with and into iShip.com, Inc., a Washington corporation. The de-registered shares have been reserved for issuance upon exercise of outstanding options and warrants assumed by the Registrant in connection with the Merger. SIGNATURES Pursuant to the requirements of the Securities Act, the Company has duly caused this post-effective amendment to the registration statement on Form S-4 to be signed on its behalf by the undersigned, thereunto duly authorized, in the city of Santa Monica, State of California, on the 5th day of April, 2000. Stamps.com Inc. By: /s/ John M. Payne ____________________________________ John M. Payne Chairman and Chief Executive Officer Pursuant to the requirements of the Securities Act of 1933, as amended, this post-effective amendment to the registration statement on Form S-4 has been signed below by the following persons in the capacities and on the dates indicated. Signature Title Date - ------------------------------------ ------------------------------------------------- ------------- /s/ John M. Payne Chairman of the Board and Chief Executive Officer April 5, 2000 - ------------------------------------ (Principal Executive Officer) John M. Payne * President, Chief Operating Officer and Director April 5, 2000 - ------------------------------------ Loren E. Smith /s/ John W. LaValle Chief Financial Officer and Senior Vice President April 5, 2000 - ------------------------------------ of Operations (Principal Financial and Accounting John W. LaValle Officer) * Director April 5, 2000 - ------------------------------------ Mohan P. Ananda * Director April 5, 2000 - ------------------------------------ David C. Bohnett * Director April 5, 2000 - ------------------------------------ Jeffrey J. Brown Signature Title Date - ------------------------------------ ------------------------------------------------- ------------- * Director April 5, 2000 - ------------------------------------ Thomas H. Bruggere * Director April 5, 2000 - ------------------------------------ Thomas N. Clancy * Director April 5, 2000 - ------------------------------------ G. Bradford Jones * Director April 5, 2000 - ------------------------------------ Marvin Runyon Director - ------------------------------------ John A. Duffy Director - ------------------------------------ Stephen Teglovic * Director April 5, 2000 - ------------------------------------ Carolyn M. Ticknor *By: /s/ John M. Payne - ------------------------------------ John M. Payne Attorney-in-Fact