Parallax Volatility Advisers, L.P. - ION GEOPHYSICAL CORP ownership

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ION GEOPHYSICAL CORP's ticker is IO and the CUSIP is 462044108. A total of 147 filers reported holding ION GEOPHYSICAL CORP in Q2 2014. The put-call ratio across all filers is 2.99 and the average weighting 0.0%.

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Quarter-by-quarter ownership
Parallax Volatility Advisers, L.P. ownership history of ION GEOPHYSICAL CORP
ValueSharesWeighting
Q1 2015$26,000
-3.7%
12,204
+23.2%
0.00%–
Q4 2014$27,000
+575.0%
9,907
+1057.4%
0.00%–
Q1 2014$4,000
+100.0%
856
+38.5%
0.00%–
Q4 2013$2,000–618–0.00%–
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Other shareholders

There were no reported owners of ION GEOPHYSICAL CORP in Q2 2014.

NameSharesValueWeighting ↓
View complete list of ION GEOPHYSICAL CORP shareholders