Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Meyer Robert Joseph JR
  2. Issuer Name and Ticker or Trading Symbol
AMERICAN TOWER CORP /MA/ [AMT]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP, Finance & Corp Controller
(Last)
(First)
(Middle)
116 HUNTINGTON AVENUE
3. Date of Earliest Transaction (Month/Day/Year)
11/30/2012
(Street)

BOSTON, MA 2116
4. If Amendment, Date 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
(City)
(State)
(Zip)
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
Common Stock 11/30/2012   S   4,606 D $ 75 4,181 (1) D  
Common Stock 12/01/2012   M   2,232 A $ 0 6,413 D  
Common stock 12/01/2012   F   709 D $ 74.93 5,704 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities
(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 of Derivative Security: 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
Restricted Stock Units (2) 12/01/2012   M     2,232   (3)   (3) Common Stock 2,232 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Meyer Robert Joseph JR
116 HUNTINGTON AVENUE
BOSTON, MA 2116
      SVP, Finance & Corp Controller  

Signatures

 /s/ Mneesha O. Nahata, as attorney-in-fact   12/04/2012
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Includes 427 shares acquired under the Company's employee stock purchase plan in May 2012. Also includes 27 shares acquired under a dividend reinvestment plan not previously required to be reported pursuant to Section 16(a) of the Securities Exchange Act of 1934 (the "Exchange Act"). The transactions reported herein resulted in a short swing profit under Section 16(b) of the Exchange Act. The reporting person has made arrangements with the Company to disgorge such profit promptly upon settlement of the sale.
(2) Each Restricted Stock Unit (RSU) represents a contingent right to receive one share of common stock.
(3) This RSU was granted on December 1, 2008 pursuant to the 2007 Equity Incentive Plan and vests in 25% cumulative annual increments beginning December 1, 2009. This Form 4 reflects the vesting of this RSU on December 1, 2012 as to 100% of the original grant amount.

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