ION GEOPHYSICAL CORP: IO (NYSE)
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3 ION GEOPHYSICAL CORP(ZHENG HUASHENG  04/20/18 (04/13/18) 
8-K ION GEOPHYSICAL CORP  04/13/18 (04/13/18) 
DEF 14A ION GEOPHYSICAL CORP  04/13/18 (05/16/18) 
4 ION GEOPHYSICAL CORP(WILLIAMSON KEN  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(USHER CHRISTOPHER THERON  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(SEITZ JOHN N  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(SCHWAUSCH SCOTT  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(POWERS MATTHEW R  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(NELSON S JAMES  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(MYERS FRANKLIN  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(LAPEYRE JAMES M JR  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(HULME COLIN  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(HANSON R BRIAN  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(BATE STEVEN  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(JENNINGS MICHAEL  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(HAO HUIMIN  03/02/18 (03/01/18) 
4 ION GEOPHYSICAL CORP(BARR DAVID H  03/02/18 (03/01/18) 
8-K ION GEOPHYSICAL CORP  03/02/18 (03/02/18) 
SC 13G ION GEOPHYSICAL CORP(EMPERY ASSET MANAGEMENT, LP  02/22/18 
424B5 ION GEOPHYSICAL CORP  02/20/18 
 
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Last Trade
Last Trade: 
$30.15  
Change: 
0.55 (1.86%)  
Trade Time: 
Apr 20  
Market Cap: 
$424.44M
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