SEGALL BRYANT & HAMILL, LLC - ION GEOPHYSICAL CORP ownership

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ION GEOPHYSICAL CORP's ticker is IO and the CUSIP is 462044108. A total of 135 filers reported holding ION GEOPHYSICAL CORP in Q4 2013. The put-call ratio across all filers is 2.89 and the average weighting 0.0%.

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Quarter-by-quarter ownership
SEGALL BRYANT & HAMILL, LLC ownership history of ION GEOPHYSICAL CORP
ValueSharesWeighting
Q1 2014$100,000
+28.2%
23,760
+0.8%
0.00%0.0%
Q4 2013$78,000
+27.9%
23,560
+100.0%
0.00%
-50.0%
Q3 2013$61,000–11,780–0.00%–
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Other shareholders

There were no reported owners of ION GEOPHYSICAL CORP in Q4 2013.

NameSharesValueWeighting ↓
View complete list of ION GEOPHYSICAL CORP shareholders