Registration No. 333-31039 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 ____________ UNION TEXAS PETROLEUM HOLDINGS, INC. (Exact name of Registrant as specified in its charter) Delaware 76-0040040 (State or other jurisdiction of (IRS Identification No.) incorporation or organization) c/o ATLANTIC RICHFIELD COMPANY 515 South Flower Street, Los Angeles, CA 90071 (213) 486-3511 (Address, including zip code, and telephone number including area code of registrant's principal executive offices) ____________ Copies to Diane A. Ward, Esq. Bruce G. Whitmore, Esq. Senior Counsel - Securities & Finance Senior Vice President, General Atlantic Richfield Company Counsel and Corporate Secretary 515 South Flower Street Atlantic Richfield Company Los Angeles, CA 90071 515 South Flower Street (213) 486-2808 Los Angeles, CA 90071 (213) 486-1774 PART II Following termination of the offering on June 29, 1998, the date on which Union Texas Petroleum Holdings, Inc. was merged into a wholly-owned, privately held subsidiary of Atlantic Richfield Company, this Post-Effective Amendment No. 1 is being filed to deregister $175 million of Common Stock, Debt Securities, Preferred Stock, Depositary Shares, representing Preferred Stock and Warrants that remained unsold on such date. Item 16. Exhibits Exhibit No. Description of Exhibit ----------- ---------------------- 3 Certificate of Merger 24 Power of Attorney Item 17. Undertakings Pursuant to Registrant's undertaking to remove from registration by means of a post-effective amendment any of the securities remaining unsold at the termination of the offering, registrant is filing this Post-Effective Amendment No. 1. - 1 - SIGNATURE 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 registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Los Angeles, State of California on September 30, 1998. UNION TEXAS PETROLEUM HOLDINGS, INC. * /s/ MICHAEL E. WILEY By:_________________________________ Michael E. Wiley Chairman of the Board and Chief Executive Officer Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed below by the following persons in the capacities and on the dates indicated. Signature Title Date --------- ----- ---- */s/ MICHAEL E. WILEY ___________________________ Chairman of the Board, September 30, 1998 Michael E. Wiley Chief Executive Officer (Principal executive and Director officer) /s/ MARK E. NICHOLLS ___________________________ Senior Vice President, September 30, 1998 Mark E. Nicholls Chief Financial Officer (Principal financial and Controller officer and Principal accounting officer) */s/ MARIE L. KNOWLES ____________________________ Director September 30, 1998 Marie L. Knowles */s/ DONALD R. VOELTE, JR. ____________________________ Director September 30, 1998 Donald R. Voelte, Jr. */s/ WILLIAM E. WADE, JR. _____________________________ Director September 30, 1998 William E. Wade, Jr. /s/ MARK E. NICHOLLS *By________________________ Mark E. Nicholls Attorney-in-Fact - 2 -