-------------------------------------------------------------------------------- -------------------------------------------------------------------------------- SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ---------------- SCHEDULE TO (RULE 13e-4) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMENDMENT NO. 1 ---------------- AMERICAN TOWER CORPORATION (Name of Subject Company (Issuer) and Filing Person (Offeror)) ---------------- Options to Purchase Class A Common Stock, $.01 Par Value Per Share, Having an Exercise Price of $20.00 or more Per Share (Title of Class of Securities) ---------------- 029912 201 (CUSIP Number of Class of Securities) (Underlying Class A Common Stock) ---------------- Steven B. Dodge Chairman and Chief Executive Officer American Tower Corporation 116 Huntington Avenue Boston, Massachusetts 02116 (617) 375-7500 (Name, address and telephone number of person authorized to receive notices and communications on behalf of filing person) Copy to: Matthew J. Gardella, Esq. Hale and Dorr LLP 60 State Street Boston, Massachusetts 02109 (617) 526-6000 ---------------- [_]Check box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing. [_]Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer. Check the appropriate boxes below to designate any transactions to which the statement relates: [_]third party tender offer subject to Rule 14d-1. [X]issuer tender offer subject to Rule 13e-4. [_]going-private transaction subject to Rule 13e-3. [_]amendment to Schedule 13D under Rule 13d-2. Check the following box if the filing is a final amendment reporting the results of the tender offer: [_] -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- INTRODUCTORY STATEMENT This Amendment No. 1 amends and supplements the Tender Offer Statement on Schedule TO filed by American Tower Corporation (the "Company") with the Securities and Exchange Commission on September 24, 2001 relating to an option exchange program being conducted by the Company for compensatory purposes. This Amendment No. 1 includes as Exhibit (a)(1) the Offer to Exchange, dated September 24, 2001, as amended on October 9, 2001. Item 12. Exhibits. Item 12 is hereby amended and supplemented to add Exhibit (a)(1), the Offer to Exchange, dated September 24, 2001, as amended on October 9, 2001, which is filed herewith. SIGNATURE After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Amendment No. 1 to Schedule TO is true, complete and correct. AMERICAN TOWER CORPORATION /s/ Justin D. Benincasa _____________________________________ Justin D. Benincasa Senior Vice President and Corporate Controller Date: October 5, 2001 1 EXHIBIT INDEX Exhibit Number Description ------- ----------- (a)(1) Offer to Exchange, dated September 24, 2001, as amended on October 9, 2001.