Alliant Energy (NASDAQ:LNT) reported quarterly earnings of $0.82 per share which beat the analyst consensus estimate of $0.80 by 2.5 percent. This is a 1.2 percent decrease over earnings of $0.83 per share from the same period last year. The company reported quarterly sales of $1.184 billion which beat the analyst consensus estimate of $1.060 billion by 11.71 percent. This is a 4.96 percent increase over sales of $1.128 billion the same period last year.