| Date | Event |
| 23-Nov-09 | Price hit new 52-week high ($41.78) |
| 18-Nov-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 17-Nov-09 | Price hit new 52-week high ($41.23) |
| 13-Nov-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 5-Nov-09 | AMERICAN TOWER CORP /MA/ Files SEC form 10-Q, Quarterly Report |
| 3-Nov-09 | Earnings announcement |
| 3-Nov-09 | American Tower Corp. Earnings Call scheduled for 8:30 am ET today |
| 3-Nov-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements and |
| 20-Oct-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Entry into a Material Definitive Agreement, Creation of a Direct Financi |
| 20-Oct-09 | Price hit new 52-week high ($40.54) |
| 14-Oct-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 13-Oct-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 18-Sep-09 | Coverage initiated on American Tower by Oppenheimer |
| 27-Aug-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 6-Aug-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 29-Jul-09 | American Tower Corp. Earnings Call scheduled for 8:30 am ET today |
| 29-Jul-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements and |
| 20-Jul-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 24-Jun-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 10-Jun-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Entry into a Material Definitive Agreement, Creation of a Direct Financi |
| 28-May-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 27-May-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 8-May-09 | AMERICAN TOWER CORP /MA/ Files SEC form 10-Q, Quarterly Report |
| 6-May-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Regulation FD Disclosure |
| 29-Apr-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements and |
| 16-Mar-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Other Events |
| 5-Mar-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and Exhi |
| 26-Feb-09 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Results of Operations and Financial Condition, Change in Directors or Pr |
| 6-Nov-08 | AMERICAN TOWER CORP /MA/ Files SEC form 10-Q, Quarterly Report |
| 3-Nov-08 | AMERICAN TOWER CORP /MA/ Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements and |