Koppers Hldgs (NYSE:KOP) reported quarterly earnings of $1.21 per share which missed the analyst consensus estimate of $1.25 by 3.43 percent. This is a 11.68 percent decrease over earnings of $1.37 per share from the same period last year. The company reported quarterly sales of $485.300 million which missed the analyst consensus estimate of $514.567 million by 5.69 percent. This is a 12.45 percent decrease over sales of $554.300 million the same period last year.