Live feed15:12:18·868dINSIDERFilingvia QuantisnowPribyl Brian Mark exercised 3,445 shares at a strike of $242.15 and returned $1,662,523 worth of shares to the company (3,445 units at $482.59) (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.NWLI· National Western Life Group Inc.FinanceOriginal source