Live feed18:15:31·1516dINSIDERFilingvia QuantisnowSEC Form 4: Zhang Shaohua covered exercise/tax liability with 750 shares and was granted 2,500 shares, increasing direct ownership by 61% to 4,623 units to cover taxesByQuantisnow·Wall Street's wire, on your screen.IO· Ion Geophysical CorporationEnergyOriginal source