Stock Trading History of Lara Gustavo

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Lara Gustavo since year 2005. The trader's CIK number is 1309361. At the time of this reporting, Lara Gustavo is the Director of American Tower Corp /ma/ . (stock ticker symbol AMT). See this page for all insider trading activities at American Tower Corp /ma/ .

Stock purchases, sales, and option exercises reported by insider *Lara Gustavo* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-06-13	AMT	American Tower Corp /ma/	Option Exercise	5,000	17.83	89,149
2008-06-13	AMT	American Tower Corp /ma/	Sale	5,000	43.02	215,075
2007-12-03	AMT	American Tower Corp /ma/	Option Exercise	20,000	17.83	356,599
2007-12-03	AMT	American Tower Corp /ma/	Sale	20,000	45.28	905,690
2005-09-01	AMT	American Tower Corp /ma/	Purchase	2,100	24.03	50,463

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Lara Gustavo (Director of American Tower Corp /ma/ at the time of this reporting) see the Securities and Exchange Commission (SEC) website.