Live feed16:15:03·653dINSIDERFilingvia QuantisnowDirector Casper Stephen P sold $259,390 worth of shares (1,000 units at $259.39), decreasing direct ownership by 10% to 9,201 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.MKTX· MarketAxess Holdings Inc.FinanceOriginal source