November 9, 2010 - The court ordered the authorization of the distribution of the net settlement fund.
June 11, 2008 - The court approved the settlement, entered the orders approving the plan of allocation, the motion for attorneys’ fees and expenses, and dismissed the action with prejudice.

February 28, 2008 - The court preliminarily approved the settlement.

February 8, 2008 - Parties filed a stipulation of settlement.

March 26, 2007 - The lead plaintiff filed an amended consolidated complaint on behalf of investors who purchased American Tower Corporation (NYSE: AMT) common shares between April 1, 2002 and May 22, 2006. The lead plaintiff alleges that the defendants violated the Securities Exchange Act of 1934 by issuing false and misleading statements between April 1, 2002 and May 22, 2006.

December 27, 2006 - The lead plaintiff and lead counsel were appointed and all cases were consolidated.

July 31, 2006 - A lead plaintiff motion was filed.

June 7, 2006 - The plaintiff filed an amended complaint.

May 26, 2006 - An investor in shares of American Tower Corporation (NYSE: AMT) filed a lawsuit in the U.S. District Court for the District of Massachusetts against American Tower Corporation over alleged violations of Federal Securities Laws in connection with certain allegedly false and misleading statements made between February 1, 2006 and May 24, 2006.

The plaintiff alleges that American Tower Corporation’s management engaged in improper “backdating” of stock option grants by\t“looking back” to select past grant\tdates, with the\tbenefit of hindsight,\tin order to take advantage of favorably low exercise prices.

The complaint further alleges that the backdated stock option\tgrants were inconsistent with American Tower Corporation’s public disclosures concerning its option grant policies and accounting and violated American Tower Corporation’s publicly filed Stock Option Plan. Plaintiffs further alleged that American Tower Corporation’s publicly issued financial statements between February 1, 2006 and May 24, 2006 were false and misleading and violated generally accepted accounting principles by accounting for the stock option grants as though they were made at fair market value.

American Tower Corporation is\t a wireless and broadcast communications infrastructure company headquartered in Boston. American Tower Corporation granted\tstock options in various amounts and at various times to\tdirectors, officers and employees as\tpart of their overall compensation. Each American Tower Corporation stock option gave the recipient the right to buy one share of American Tower Corporation common stock from the\tcompany at a set price, called the “exercise price”\tor the “strike price,”\ton a future date after the option vested. With certain exceptions, American Tower Corporation Stock Option Plan generally\trequired the exercise price to be equal to the fair market value of American Tower Corporation (NYSE: AMT) common stock on the date the option is granted.