Koppers Hldgs (NYSE:KOP) reported quarterly earnings of $0.70 per share which beat the analyst consensus estimate of $0.59 by 18.04 percent. This is a 9.09 percent decrease over earnings of $0.77 per share from the same period last year. The company reported quarterly sales of $432.700 million which missed the analyst consensus estimate of $444.500 million by 2.65 percent. This is a 9.29 percent decrease over sales of $477.000 million the same period last year.