<center><!-- SpaceID=0 robot --> <table><tr align=center><td><!-- SpaceID=0 robot --> </td></tr></table></center><p><form action=http://finance.yahoo.com/r><table border=0 width=100% cellpadding=4 cellspacing=0><tr bgcolor=6699cc><td valign=top><font face=arial size=+1><b>Conference Calls for American Tower Corp (NYSE:<a href="http://finance.yahoo.com/q?s=amt">AMT</a>)</b></font></td><td width=10%><br></td><td valign=top align=right><table border=0 cellpadding=2 cellspacing=0><tr bgcolor=bbccdd><td align=center> <font size=-1 face=arial><nobr> <a href=/cc/index.html><font face=arial size=-1>Today's Calls</font></a> </nobr></font> </td></tr></table></td></tr></table><table border=0 width=100% cellpadding=2 cellspacing=0><tr bgcolor=dcdcdc><td width=8% nowrap><small>Enter symbol:<br><a href=http://finance.yahoo.com/l>symbol lookup</a></small></td><td><input size=8 name=s><input type=hidden name=d value=cc><input type=submit value="Get Calls"></td><td width=10%><br></td><td align=right><small> <!-- SpaceID=0 robot --> </small> </td></tr></table></form><p><center><small><b>More Info:</b> <nobr><a href="http://finance.yahoo.com/q?s=amt&d=t">Quote</a> |</nobr> <nobr><a href="http://finance.yahoo.com/q?s=amt&d=1y">Chart</a> |</nobr> <nobr><a href="http://finance.yahoo.com/q/h?s=amt">News</a> |</nobr> <nobr><a href="http://finance.yahoo.com/q/pr?s=amt">Profile</a> |</nobr> <nobr><a href="http://screener.finance.yahoo.com/d?vw=0&db=reports&z=dat&tk=amt">Reports</a> |</nobr> <nobr><a href="http://finance.yahoo.com/q/ae?s=amt">Research</a> |</nobr> <nobr><a href="http://finance.yahoo.com/q/sec?s=amt">SEC</a> |</nobr> <nobr><a href="http://messages.yahoo.com/?action=q&board=amt">Msgs</a> |</nobr> <nobr><a href="http://finance.yahoo.com/q/it?s=amt">Insider</a> |</nobr> <nobr><a href="http://finance.yahoo.com/q/is?s=amt">Financials</a> |</nobr> <a href="http://finance.yahoo.com/q/sa?s=amt">Analyst Ratings</a></small><p><table border=0 cellpadding=0 cellspacing=0><tr><td><small>Times are U.S. Eastern</small><br><table cellpadding=4 cellspacing=0 border=1><tr valign=bottom bgcolor=DCDCDC><td align=center><font face=arial><b>Date</b></font></td><td align=center><b><font face=arial>Event Title</font></b></td><td align=center><b><font face=arial>Access</font></b></td></tr><tr bgcolor=FFFF99 align=center valign=top><td nowrap><a href=/cc/20130226.html>Tue, Feb 26, 2013</a><br>8:30 am</td><td align=left>American Tower Corp Earnings Conference Call (Q4 2012)</td><td><a href=/cc/2/136052.html><b>Listen Now</b></a></td></tr><tr bgcolor=FFFF99 align=center valign=top><td nowrap><a href=/cc/20130501.html>Wed, May 1, 2013</a><br>8:30 am</td><td align=left>American Tower Corp Earnings Conference Call (Q1 2013)</td><td><a href=/cc/1/138031.html><b>Listen Now</b></a></td></tr></table></td></tr></table><p><hr size=1 noshade><font size=-2 face=arial>Copyright © 2013 Yahoo! Inc. All Rights Reserved. <a href=http://privacy.yahoo.com>Privacy Policy</a> - <a href=http://docs.yahoo.com/info/terms/>Terms of Service</a><br>Data and information is provided for informational purposes only, and is not intended for trading purposes. Neither Yahoo! nor any of its data or content providers shall be liable for any errors or delays in the content, nor for any actions taken in reliance thereon.</font></center><!-- Yahoo TimeStamp: 1367411758 --> </html><!-- SpaceID=0 robot --> <!-- biz72.ac4 31546 --> <!-- biz72.finance.ac4.yahoo.com compressed Thu May 23 14:54:53 PDT 2013 -->