WELLINGTON MANAGEMENT GROUP LLP - ION GEOPHYSICAL CORP ownership

ION GEOPHYSICAL CORP's ticker is IO and the CUSIP is 462044108. A total of 151 filers reported holding ION GEOPHYSICAL CORP in Q2 2013. The put-call ratio across all filers is 2.71 and the average weighting 0.1%.

Quarter-by-quarter ownership
WELLINGTON MANAGEMENT GROUP LLP ownership history of ION GEOPHYSICAL CORP
ValueSharesWeighting
Q3 2015$78,000
-63.2%
198,3560.0%0.00%
Q2 2015$212,000
-50.7%
198,3560.0%0.00%
Q1 2015$430,000
-21.2%
198,3560.0%0.00%
Q4 2014$546,000
+85.7%
198,356
+88.4%
0.00%
Q3 2014$294,000
-33.3%
105,307
+0.8%
0.00%
Q2 2014$441,000
-70.6%
104,509
-70.6%
0.00%
Q1 2014$1,498,000
+27.5%
355,9090.0%0.00%
Q4 2013$1,175,000
-96.6%
355,909
-94.7%
0.00%
-100.0%
Q3 2013$35,029,000
-34.7%
6,736,485
-24.4%
0.01%
-38.9%
Q2 2013$53,620,0008,907,0700.02%
Other shareholders
ION GEOPHYSICAL CORP shareholders Q2 2013
NameSharesValueWeighting ↓
VILLERE ST DENIS J & CO LLC 10,309,119$34,020,0001.32%
LANDSCAPE CAPITAL MANAGEMENT, L.L.C. 141,508$467,0000.43%
NCM Capital Advisers, Inc. 121,100$400,0000.41%
US GLOBAL INVESTORS FUNDS 644,781$2,128,0000.38%
U S GLOBAL INVESTORS INC 644,781$2,128,0000.38%
Archer Capital Management, L.P. 736,200$2,429,0000.36%
Parametrica Management Ltd 38,546$127,0000.35%
Counsel Portfolio Services Inc. 577,175$1,905,0000.20%
TFS CAPITAL LLC 1,046,927$3,455,0000.16%
OTA Financial Group L.P. 68,629$226,0000.14%
View complete list of ION GEOPHYSICAL CORP shareholders