As filed with the Securities and Exchange Commission on January 6, 2006 SEC File No. 333-112240 ================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 2 TO FORM SB-2 ON FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 BSD MEDICAL CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 75-1590407 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification No.) 2188 West 2200 South Salt Lake City, Utah 84119 (801) 972-5555 (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) Hyrum A. Mead, President BSD Medical Corporation 2188 West 2200 South Salt Lake City, Utah 84119 (801) 972-5555 (Name, address, including zip code, and telephone number, including area code, of agent for service) Copy to: Nolan S. Taylor, Esq. DORSEY & WHITNEY LLP 170 South Main Street, Suite 900 Salt Lake City, Utah 84101-1655 Telephone: (801) 933-7360 Facsimile: (801) 933-7373 -------------------------------------------------------------------------------- Approximate date of commencement of proposed sale to the public: Not applicable. If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: |_| If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, 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(c) 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. |_| If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. |_| If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. |_| This Post-Effective Amendment shall become effective in accordance with Section 8(c) of the Securities Act of 1933, as amended, on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(c), may determine. ================================================================================ RECENT EVENTS: DEREGISTRATION The Registrant registered 2,047,580 shares of its common stock, par value $0.001 per share (the "Common Stock"), under the Registration Statement filed with the Securities and Exchange Commission on January 27, 2004 and subsequently amended on May 18, 2004, July 7, 2004, July 22, 2004, July 23, 2004 and June 14, 2005 (Registration No. 333-112240) (the "Registration Statement"). Pursuant to a Securities Purchase Agreement dated November 28, 2003 and amended on December 10, 2003, entered into among the Registrant and the purchasers signatory thereto (filed as Exhibit 4.2 to the Registration Statement), the Registrant's obligation to maintain the effectiveness of the Registration Statement has expired. Accordingly, pursuant to an undertaking made in Item 17 of the Registration Statement, the Registrant hereby removes the Common Stock from registration. 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-3 and has duly caused this post-effective amendment to the registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Salt Lake City, Utah, on January 6, 2006. BSD MEDICAL CORPORATION By: /s/ HYRUM A. MEAD ------------------------ Hyrum A. Mead President Pursuant to the requirements of the Securities Act of 1933, this post-effective amendment to the Registration Statement has been signed by the following persons in the capacities and on the dates indicated. Signature Title Date * --------------- Chairman of the Board, Senior Vice January 6, 2006 Paul F. Turner President and Chief Technology Officer * -------------- President (principal executive January 6, 2006 Hyrum A. Mead officer) and Director * -------------- Controller (principal financial and January 6, 2006 Dennis Bradley accounting officer) * -------------------- Director January 6, 2006 Gerhard W. Sennewald * ------------- Director January 6, 2006 Michael Nobel * --------------- Director January 6, 2006 J. Gordon Short *By: /s/ HYRUM A MEAD ---------------- Hyrum A. Mead Attorney-in-Fact