Live feed17:01:19·1219dINSIDERFilingvia QuantisnowSEC Form 4: Russell Stacy covered exercise/tax liability with 8,477 shares, decreasing direct ownership by 5% to 156,071 units (for withholding tax)ByQuantisnow·Wall Street's wire, on your screen.SLCA· U.S. Silica Holdings Inc.IndustrialsOriginal source