Live feed21:05:26·872dINSIDERFilingvia QuantisnowPribyl Brian Mark exercised 1,135 shares at a strike of $185.22 and returned $482,010 worth of shares to the company (1,000 units at $482.01) (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.NWLI· National Western Life Group Inc.FinanceOriginal source