The company earned $180.1 million, or 45 cents per share, down from earnings of $232.1 million, or 58 cents per share, in the 2012 third quarter..
Adjusted Funds From Operations increased 24 percent to $367.3 million, from $295.3 million last year. FFO is considered a key financial measure for real estate investment trusts like American Tower. It adds back such items as amortization and depreciation to net income.
Analysts, on average, expected FFO of 91 cents per share, according to FactSet.