Company:  AMERICAN TOWER CORP /MA/ (AMT)
Form Type:  4
Filing Date:  4/3/2012 
CIK:  0001053507 
Address:  116 HUNTINGTON AVE 
City, State, Zip:  BOSTON, Massachusetts 02116 
Telephone:  (617) 375-7500 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$84.64  
Change: 
0.72 (0.86%)  
Trade Time: 
May 21  
Market Cap: 
$33.47B
Description of Business
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  FORM 4
    NAME AND TITLE
    NON DERIVATIVE SECURITIES
    DERIVATIVE SECURITIES
    EXPLANATIONS AND REMARKS
    REPORTING OWNERS
    SIGNATURES