SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
CHAVKIN ARNOLD L

(Last) (First) (Middle)
JP MORGAN PARTNERS
1221 AVENUE OF THE AMERICAS 40TH FLOOR

(Street)
NEW YORK NY 10020

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
AMERICAN TOWER CORP /MA/ [ AMT ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
10/08/2003
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Class A Common Stock 10/08/2003 S 39 D $10.98 1,933,825 I See Footnote(1)
Class A Common Stock 10/08/2003 S 66,328 D $10.94 1,933,825 I See Footnote(1)
Class A Common Stock 10/08/2003 S 534 D $10.96 1,933,825 I See Footnote(1)
Class A Common Stock 10/08/2003 S 1,066 D $10.95 1,933,825 I See Footnote(1)
Class A Common Stock 10/08/2003 S 22,857 D $10.99 1,933,825 I See Footnote(1)
Class A Common Stock 10/08/2003 S 61 D $10.98 3,142,263 I See Footnote(2)
Class A Common Stock 10/08/2003 S 107,776 D $10.94 3,142,263 I See Footnote(2)
Class A Common Stock 10/08/2003 S 866 D $10.96 3,142,263 I See Footnote(2)
Class A Common Stock 10/08/2003 S 1,734 D $10.95 3,142,263 I See Footnote(2)
Class A Common Stock 10/08/2003 S 37,143 D $10.99 3,142,263 I See Footnote(2)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Options to purchase Class A Common Stock $9.09 (3) 01/02/2007 Class A Common Stock 15,539 15,539 D(4)
Options to purchase Class A Common Stock $10 (3) 01/08/2008 Class A Common Stock 25,000 25,000 D(4)
Options to purchase Class A Common Stock $23.75 12/01/1999 12/01/2008 Class A Common Stock 25,000 25,000 D(4)
Options to purchase Class A Common Stock $30.63 09/21/2000 09/21/2010 Class A Common Stock 15,000 15,000 D(4)
Options to purchase Class A Common Stock $23.8125 11/11/2000 11/11/2009 Class A Common Stock 25,000 25,000 D(4)
Options to purchase Class A Common Stock $5.91 01/18/2002 01/18/2011 Class A Common Stock 5,000 5,000 D(4)
Options to purchase Class A Common Stock $3.04 (5) 12/09/2012 Class A Common Stock 10,000 10,000 D(4)
Explanation of Responses:
1. The amounts shown in lines 1 through 5 of Table I and in Table II represent the beneficial ownership of the Issuer's equity securities by J.P. Morgan Partners (BHCA), L.P. ("JPM BHCA"), a portion of which may be deemed attributable to the Reporting Person because the Reporting Person is an Executive Vice President of JPMP Capital Corporation, the general partner of JPMP Master Fund Manager, L.P. ("MF Manager"), the general partner of JPM BHCA. Mr. Chavkin disclaims beneficial ownership of the securities except to the extent of his pecuniary interest therein.
2. These shares are owned by J.P. Morgan Partners (23A SBIC), LLC, an affiliate of JPM BHCA. Mr. Chavkin disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.
3. Exercisable in 20% annual increments beginning the first anniversary of original grant date.
4. Stock option grant for non-employee directors issued pursuant to the 1997 American Tower Stock Option Plan. The reporting person is obligated to exercise these options at the request of, and to transfer the shares issued thereunder to, JPM BHCA. The reporting person disclaims beneficial ownership of the options and any shares issuable upon their exercise to the extent such ownership exceeds his pecuniary interest therein.
5. Exercisable in 25% cumulative annual increments beginning December 9, 2003.
/s/ Arnold L. Chavkin 10/10/2003
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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