Koppers Hldgs (NYSE: KOP) reported quarterly earnings of $0.57 per share which beat the analyst consensus estimate of $0.43 by 29.55 percent. This is a 19.72 percent decrease over earnings of $0.71 per share from the same period last year. The company reported quarterly sales of $455.300 million which beat the analyst consensus estimate of $410.450 million by 10.93 percent. This is a 0.26 percent decrease over sales of $456.500 million the same period last year.