As filed with the Securities and Exchange Commission on March 27, 2007 Registration No. 33-52065 ================================================================================ UNITED STATES 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 ATWOOD OCEANICS, INC. (Exact name of registrant as specified in its charter) TEXAS 74-1611874 (State or other jurisdiction of (I. R. S. Employer incorporation or organization) Identification No.) 15835 PARK TEN PLACE DRIVE HOUSTON, TEXAS 77084 (Address of principal executive offices) ATWOOD OCEANICS, INC. 1990 STOCK OPTION PLAN (Full title of the plan) JAMES M. HOLLAND SENIOR VICE PRESIDENT AND CHIEF FINANCIAL OFFICER ATWOOD OCEANICS, INC. 15835 PARK TEN PLACE DRIVE HOUSTON, TEXAS 77084 (281) 749-7800 (Name, address and telephone number of agent for service) Copies to: STRASBURGER & PRICE, L.L.P. 1401 MCKINNEY ST., STE 2200 HOUSTON, TEXAS 77010 (713) 951-5600 ATTN: W. GARNEY GRIGGS, ESQ. ================================================================================ DEREGISTRATION OF SECURITIES This Post-Effective Amendment No. 1 relates to the Registration Statement on Form S-8, Registration No. 33-52065, filed on January 28, 1994 (the "Registration Statement"), pertaining to common shares of Atwood Oceanics, Inc. (the "Registrant") to be offered under the Atwood Oceanics, Inc. 1990 Stock Option Plan. The Registrant hereby removes and withdraws from registration all of its securities registered pursuant to this Registration Statement that remain unissued. SIGNATURES Pursuant to the requirements of the Securities Act of 1933, Atwood Oceanics, Inc. 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 amendment to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on March 27, 2007. ATWOOD OCEANICS, INC. /s/ James M. Holland ----------------------------------- James M. Holland Senior Vice President, Chief Financial Officer, Chief Accounting Officer and Secretary Pursuant to the requirements of the Securities Act of 1933, as amended, this Post-Effective Amendment No. 1 to the Registration Statement has been signed by the following persons in the capacities and on the dates indicated. /s/ JOHN R. IRWIN /s/ JAMES M. HOLLAND ----------------------------------- ----------------------------------- JOHN R. IRWIN JAMES M. HOLLAND President, Chief Executive Senior Vice President Officer and Director and Chief Financial Officer (Principal Executive Officer) (Principal Financial and Accounting Officer) Date: March 27, 2007 Date: March 27, 2007 /s/ ROBERT W. BURGESS /s/ GEORGE S. DOTSON ----------------------------------- ----------------------------------- ROBERT W. BURGESS GEORGE S. DOTSON Director Director Date: March 27, 2007 Date: March 27, 2007 /s/ HANS HELMERICH /s/ WILLIAM J. MORRISSEY ----------------------------------- ----------------------------------- HANS HELMERICH WILLIAM J. MORRISSEY Director Director Date: March 26, 2007 Date: March 27, 2007 /s/ DEBORAH A. BECK /s/ JAMES R. MONTAGUE ----------------------------------- ----------------------------------- DEBORAH A. BECK JAMES R. MONTAGUE Director Director Date: March 22, 2007 Date: March 27, 2007