GROUP ONE TRADING, L.P. - ION GEOPHYSICAL CORP CMN STK ownership

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ION GEOPHYSICAL CORP CMN STK's ticker is and the CUSIP is 462044908. A total of 2 filers reported holding ION GEOPHYSICAL CORP CMN STK in Q2 2013. The put-call ratio across all filers is - and the average weighting 0.0%.

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Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of ION GEOPHYSICAL CORP CMN STK
ValueSharesWeighting
Q1 2015$3,0000.0%1,500
+114.3%
0.00%–
Q2 2014$3,000
-70.0%
700
-76.7%
0.00%–
Q4 2013$10,000
-80.4%
3,000
-69.4%
0.00%
-100.0%
Q3 2013$51,000
+27.5%
9,800
+46.3%
0.00%0.0%
Q2 2013$40,000–6,700–0.00%–
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Other shareholders
ION GEOPHYSICAL CORP CMN STK shareholders Q2 2013
NameSharesValueWeighting ↓
GROUP ONE TRADING, L.P. 6,700$40,0000.00%
Citadel Advisors 12,400$75,0000.00%
View complete list of ION GEOPHYSICAL CORP CMN STK shareholders