Live feed16:30:08·296dINSIDERFilingvia QuantisnowChief Operating Officer Wallace Michael W sold $193,118 worth of shares (10,806 units at $17.87), decreasing direct ownership by 21% to 40,369 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.SPOK· Spok Holdings Inc.TelecommunicationsOriginal source