1 AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 25, 1996 REGISTRATION NO. 333-08769 SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------------------- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ---------------------- ORBITAL SCIENCES CORPORATION (Exact Name of Registrant as specified in its charter) DELAWARE 06-1209561 (State or other jurisdiction of (I.R.S. Employer I.D. No.) incorporation or organization) 21700 ATLANTIC BOULEVARD DULLES, VIRGINIA 20166 (703) 406-5000 (Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices) DAVID W. THOMPSON CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER ORBITAL SCIENCES CORPORATION 21700 ATLANTIC BOULEVARD DULLES, VIRGINIA 20166 (703) 406-5000 (Name, address, including zip code, and telephone number, including area code, of agent for service) Copies to: DANIEL S. EVANS, ESQ. CRAIG B. BROD, ESQ. ROPES & GRAY CLEARY, GOTTLIEB, STEEN & HAMILTON ONE INTERNATIONAL PLACE ONE LIBERTY PLAZA BOSTON, MA 02110 NEW YORK, N.Y. 10006 (617) 951-7000 (212) 225-2000 ---------------------- THIS POST-EFFECTIVE AMENDMENT NO. 1 TO THE REGISTRATION STATEMENT SHALL HEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(c) OF THE SECURITIES ACT OF 1933. 2 The Registrant hereby withdraws from registration under this Registration Statement on Form S-3 (File No. 333-08769) 3,428,522 of the 3,887,304 shares of common stock, par value $.01 per share ("Common Stock"), of the Registrant originally registered hereunder. The Registration Statement covered the sale of an aggregate of 458,782 shares of Common Stock heretofore sold by Deutsche Morgan Grenfell/C.J. Lawrence (the "Purchaser"), which shares were acquired by the Purchaser from the Registrant either (i) pursuant to the Standby Agreement dated July 25, 1996 between the Registrant and the Purchaser or (ii) on conversion of 6 3/4% Convertible Subordinated Debentures due 2003 of the Registrant held by the Purchaser. 3 SIGNATURES Pursuant to the requirements of the Securities Act of 1993, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for the filing on Form S-3 and has duly caused this Post-Effective Amendment No. 1 to Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the County of Loudoun, the Commonwealth of Virginia, on this 25th day of September, 1996. ORBITAL SCIENCES CORPORATION By: /s/ David W. Thompson ------------------------- David W. Thompson, Chairman of the Board, President and Chief Executive Officer Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment No. 1 to Registration Statement has been signed by the following persons in the capacities indicated and as of the 25th day of September, 1996. Signature Title - --------- ----- /s/ David W. Thompson Chairman of the Board, President - ------------------------------------------- and Chief Executive Director David W. Thompson (Principal Executive Officer) /s/ Jeffrey V. Pirone Vice President and Controller - ------------------------------------------- (Principal Financial and Jeffrey V. Pirone Accounting Officer) /s/ Bruce W. Ferguson Director - ------------------------------------------- Bruce W. Ferguson * Director - ------------------------------------------- James R. Thompson * Director - ------------------------------------------- Fred C. Alcorn 4 * Director - ------------------------------------------- Kelly H. Burke * Director - ------------------------------------------- Daniel J. Fink * Director - ------------------------------------------- Lennard A. Fisk * Director - ------------------------------------------- Douglas S. Luke * Director - ------------------------------------------- John L. McLucas * Director - ------------------------------------------- Harrison H. Schmitt * Director - ------------------------------------------- Scott L. Webster *By: /s/ David W. Thompson ---------------------- David W. Thompson Attorney-in-Fact