ION GEOPHYSICAL CORP's ticker is IO and the CUSIP is 462044108. A total of 2 filers reported holding ION GEOPHYSICAL CORP in Q3 2011. The put-call ratio across all filers is - and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2013 | $379,000 | +134.0% | 58,200 | +120.5% | 0.01% | +75.0% |
| Q4 2011 | $162,000 | -21.0% | 26,400 | -39.2% | 0.00% | -33.3% |
| Q3 2011 | $205,000 | +28.9% | 43,400 | +158.3% | 0.01% | +50.0% |
| Q2 2011 | $159,000 | -62.2% | 16,800 | -49.4% | 0.00% | -60.0% |
| Q1 2011 | $421,000 | +49.3% | 33,200 | 0.0% | 0.01% | +42.9% |
| Q4 2010 | $282,000 | – | 33,200 | – | 0.01% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| VILLERE ST DENIS J & CO LLC | 10,309,119 | $34,020,000 | 1.32% |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | 141,508 | $467,000 | 0.43% |
| NCM Capital Advisers, Inc. | 121,100 | $400,000 | 0.41% |
| US GLOBAL INVESTORS FUNDS | 644,781 | $2,128,000 | 0.38% |
| U S GLOBAL INVESTORS INC | 644,781 | $2,128,000 | 0.38% |
| Archer Capital Management, L.P. | 736,200 | $2,429,000 | 0.36% |
| Parametrica Management Ltd | 38,546 | $127,000 | 0.35% |
| Counsel Portfolio Services Inc. | 577,175 | $1,905,000 | 0.20% |
| TFS CAPITAL LLC | 1,046,927 | $3,455,000 | 0.16% |
| OTA Financial Group L.P. | 68,629 | $226,000 | 0.14% |