Live feed16:31:00·1445dINSIDERFilingvia QuantisnowSEC Form 4: Usher Christopher Theron covered exercise/tax liability with 13,377 shares, decreasing direct ownership by 4% to 328,372 units (tax liability)ByQuantisnow·Wall Street's wire, on your screen.IO· Ion Geophysical CorporationEnergyOriginal source
