/------------------------------/ / OMB APPROVAL / /------------------------------/ / OMB Number: 3235-0287 / / Expires: December 31, 2001 / / Estimated average burden / / hours per response...... 0.5 / /------------------------------/ +--------+ | FORM 4 | U.S. SECURITIES AND EXCHANGE COMMISSION +--------+ WASHINGTON, D.C. 20549 [_] Check this box if no longer subject STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP to Section 16. Form 4 or Form 5 Filed pursuant to Section 16(a) of the Securities obligations may Exchange Act of 1934, Section 17(a) of the continue. See Public Utility Holding Company Act of 1935 or Instruction 1(b). Section 30(f) of the Investment Company Act of 1940 (Print or Type Responses) -------------------------------------------------------------------------------- 1. Name and Address of Reporting Person* Singer Bradley E. -------------------------------------------------------------------------------- (Last) (First) (Middle) 116 Huntington Avenue -------------------------------------------------------------------------------- (Street) Boston Massachusetts 02116 -------------------------------------------------------------------------------- (City) (State) (Zip) 2. Issuer Name and Ticker or Trading Symbol American Tower Corporation (NYSE: AMT) -------------------------------------------------------------------------------- 3. I.R.S. Identification Number of Reporting Person, if an Entity (Voluntary) -------------------------------------------------------------------------------- 4. Statement for Month/Year September 2001 -------------------------------------------------------------------------------- 5. If Amendment, Date of Original (Month/Year) -------------------------------------------------------------------------------- 6. Relationship of Reporting Person to Issuer (Check all applicable) Director X Officer 10% Owner Other --- --- (give title below) --- --- (specify below) Executive Vice President, Finance -------------------------------------------------------------------------------- 7. Individual or Joint/Group Filing (Check applicable line) X Form filed by One Reporting Person ---- ---- Form filed by More than One Reporting Person Reminder: Report on a seperate line for each class of securities beneficially owned directly or indirectly. * If this form is filed by more than one reporting person, see Instruction 4(b)(v). (Over) SEC 1474 (3-99)
------------------------------------------------------------------------------------------------------------------------------------ Table I--Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned ------------------------------------------------------------------------------------------------------------------------------------ 1. Title 2. Trans- 3. Trans- 4. Securities Acquired (A) 5. Amount of 6. Owner- 7. Nature of action action or Disposed of (D) Securities ship of In- Security Date Code (Instr. 3, 4 and 5) Beneficially Form: direct (Instr. 3) (Month/ (Instr. 8) Owned at Direct Bene- Day/ ----------------------------------------------- End of (D) or ficial Year) Month Indirect Owner- Code V Amount (A) or Price (Instr. 3 and 4) (I) ship (D) (Instr. 4) (Instr. 4) ------------------------------------------------------------------------------------------------------------------------------------ Class A Common 9/17/01 J 2,500 A $11.99 Stock (1) ------------------------------------------------------------------------------------------------------------------------------------ Class A Common 9/17/01 J 2,500 A $11.98 5,000(2) D Stock (1) ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------
FORM 4 (continued) ----------------------------------------------------------------------------------------------------------------------------- Table II-Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) ----------------------------------------------------------------------------------------------------------------------------- 1. Title of Derivative 2. Conver- 3. Trans- 4. Transac- 5. Number of Deriv- Security (Instr. 3) sion or action tion Code ative Securities Exercise Date (Instr. 8) Acquired (A) or Price of (Month/ Disposed of (D) Deriv- Day/ (Instr. 3, 4, and 5) ative Year) Security --------------------------------------------------- Code V A D ----------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------- -----------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------ Table II--Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) -- continued ------------------------------------------------------------------------------------------------------------------------------------ 6. Date Exer- 7. Title and Amount of 8. Price 9. Number 10. Owner- 11. Na- cisable and Underlying Securities of of Deriv- ship ture Expiration (Instr. 3 and 4) Deriv- ative Form of In- Date ative Secur- of De- direct (Month/Day/ Secur- ities rivative Bene- Year) ity Bene- Security: ficial (Instr. ficially Direct Owner- -------------------------------------------- 5) Owned (D) or ship Date Expira- Amount or at End Indi- (Instr. Exer- tion Title Number of of rect (I) 4) cisable Date Shares Month (Instr. 4) (Instr. 4) ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ Explanation of Responses: (1) This Form 4 is being filed to report Mr. Singer's purchase of 5,000 shares of Class A Common Stock on the open market on September 17, 2001. The purchases reported herein are being reported using the Transaction Code "J" pursuant to the instructions contained in the Emergency Order issued by the Securities and Exchange Commission on September 14, 2001, Release Number 44791 under the Securities Exchange Act of 1934. (2) The information set forth in column 5, "Amount of Securities Beneficially Owned at End of Month" includes information, as of September 17, 2001, only with respect to Mr. Singer's beneficial ownership of Class A Common Stock. It does not include information about Mr. Singer's beneficial ownership of stock options to purchase Class A Common Stock because Mr. Singer had no reportable transactions in these securities during the period for which this report is filed. ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). /s/ Bradley E. Singer September 20, 2001 ------------------------------- -------------------- Note: File three copies of this Form, one of which must be manually signed.