ION GEOPHYSICAL CORP's ticker is IO and the CUSIP is 462044207. A total of 74 filers reported holding ION GEOPHYSICAL CORP in Q1 2019. The put-call ratio across all filers is 0.03 and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q4 2018 | $13,000 | +333.3% | 2,455 | +1378.9% | 0.00% | – |
| Q3 2018 | $3,000 | -25.0% | 166 | -1.2% | 0.00% | – |
| Q2 2018 | $4,000 | 0.0% | 168 | +18.3% | 0.00% | – |
| Q1 2018 | $4,000 | +100.0% | 142 | -45.0% | 0.00% | – |
| Q3 2017 | $2,000 | 0.0% | 258 | -39.6% | 0.00% | – |
| Q2 2017 | $2,000 | 0.0% | 427 | 0.0% | 0.00% | – |
| Q1 2017 | $2,000 | -50.0% | 427 | -41.4% | 0.00% | – |
| Q4 2016 | $4,000 | +300.0% | 729 | +296.2% | 0.00% | – |
| Q2 2016 | $1,000 | 0.0% | 184 | +23.5% | 0.00% | – |
| Q1 2016 | $1,000 | – | 149 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Alambic Investment Management, L.P. | 73,913 | $674,000 | 0.51% |
| Gates Capital Management | 539,855 | $4,923,000 | 0.21% |
| Spark Investment Management LLC | 100,000 | $912,000 | 0.12% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 130,216 | $1,188,000 | 0.02% |
| Squarepoint Ops LLC | 98,634 | $900,000 | 0.01% |
| Quantamental Technologies LLC | 2,371 | $22,000 | 0.01% |
| Renaissance Technologies | 901,519 | $8,222,000 | 0.01% |
| ROYCE & ASSOCIATES LP | 71,880 | $656,000 | 0.01% |
| Neuberger Berman Group LLC | 480,187 | $4,377,000 | 0.01% |
| ACADIAN ASSET MANAGEMENT LLC | 106,808 | $974,000 | 0.00% |