Arch Capital Group (NASDAQ: ACGL) reported quarterly earnings of $2.58 per share which beat the analyst consensus estimate of $2.31 by 11.93 percent. This is a 0.39 percent increase over earnings of $2.57 per share from the same period last year. The company reported quarterly sales of $4.337 billion which missed the analyst consensus estimate of $4.361 billion by 0.55 percent. This is a 21.65 percent increase over sales of $3.565 billion the same period last year.