Live feed16:30:03·411dINSIDERFilingvia QuantisnowChief Operating Officer Wallace Michael W sold $99,167 worth of shares (6,000 units at $16.53), decreasing direct ownership by 9% to 61,175 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.SPOK· Spok Holdings Inc.TelecommunicationsOriginal source