ION GEOPHYSICAL CORP: IO (NYSE)
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SC 13G ION GEOPHYSICAL CORP(EMPERY ASSET MANAGEMENT, LP  02/22/18 
424B5 ION GEOPHYSICAL CORP  02/20/18 
8-K ION GEOPHYSICAL CORP  02/16/18 (02/15/18) 
424B5 ION GEOPHYSICAL CORP  02/15/18 
S-3MEF ION GEOPHYSICAL CORP  02/15/18 
SC 13G/A ION GEOPHYSICAL CORP(INVESCO LTD.  02/12/18 
10-K/A ION GEOPHYSICAL CORP  02/12/18 (12/31/17) 
10-K ION GEOPHYSICAL CORP  02/08/18 (12/31/17) 
8-K ION GEOPHYSICAL CORP  02/08/18 (02/07/18) 
4 ION GEOPHYSICAL CORP(WILLIAMSON KEN  12/19/17 (12/15/17) 
4 ION GEOPHYSICAL CORP(USHER CHRISTOPHER THERON  12/19/17 (12/15/17) 
4 ION GEOPHYSICAL CORP(SCHWAUSCH SCOTT  12/19/17 (12/15/17) 
4 ION GEOPHYSICAL CORP(POWERS MATTHEW R  12/19/17 (12/15/17) 
4 ION GEOPHYSICAL CORP(HANSON R BRIAN  12/19/17 (12/15/17) 
4 ION GEOPHYSICAL CORP(HULME COLIN  12/19/17 (12/15/17) 
4 ION GEOPHYSICAL CORP(BATE STEVEN  12/19/17 (12/15/17) 
8-K ION GEOPHYSICAL CORP  12/19/17 (12/19/17) 
4 ION GEOPHYSICAL CORP(WILLIAMSON KEN  12/18/17 (12/14/17) 
4 ION GEOPHYSICAL CORP(SCHWAUSCH SCOTT  12/18/17 (12/14/17) 
4 ION GEOPHYSICAL CORP(USHER CHRISTOPHER THERON  12/18/17 (12/14/17) 
 
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Last Trade
Last Trade: 
$27.05  
Change: 
-0.65 (-2.35%)  
Trade Time: 
Feb 22  
Market Cap: 
$374.47M
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