Spok Holdings (NASDAQ:SPOK) reported quarterly earnings of $0.15 per share which missed the analyst consensus estimate of $0.19 by 21.05 percent. This is a 16.67 percent decrease over earnings of $0.18 per share from the same period last year. The company reported quarterly sales of $33.867 million which missed the analyst consensus estimate of $35.900 million by 5.66 percent. This is a 2.88 percent decrease over sales of $34.870 million the same period last year.