ION GEOPHYSICAL CORP's ticker is IO and the CUSIP is 462044207. A total of 55 filers reported holding ION GEOPHYSICAL CORP in Q4 2017. The put-call ratio across all filers is 0.17 and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2018 | $204,000 | +2814.3% | 8,386 | +3100.8% | 0.00% | – |
| Q1 2018 | $7,000 | -41.7% | 262 | -56.0% | 0.00% | – |
| Q4 2017 | $12,000 | – | 595 | +1166.0% | 0.00% | – |
| Q1 2017 | $0 | – | 47 | 0.0% | 0.00% | – |
| Q4 2016 | $0 | – | 47 | 0.0% | 0.00% | – |
| Q3 2016 | $0 | – | 47 | 0.0% | 0.00% | – |
| Q2 2016 | $0 | -100.0% | 47 | -97.1% | 0.00% | – |
| Q1 2016 | $13,000 | – | 1,602 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Gates Capital Management | 582,946 | $2,827,000 | 0.10% |
| ALGERT GLOBAL LLC | 42,959 | $208,000 | 0.06% |
| Spark Investment Management LLC | 64,678 | $313,000 | 0.02% |
| IMPAX ASSET MANAGEMENT LLC | 50,000 | $243,000 | 0.01% |
| A.R.T. Advisors, LLC | 41,680 | $202,000 | 0.01% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 155,724 | $755,000 | 0.01% |
| Alambic Investment Management, L.P. | 13,900 | $67,000 | 0.01% |
| OXFORD ASSET MANAGEMENT LLP | 49,379 | $239,000 | 0.01% |
| Connor, Clark & Lunn Investment Management Ltd. | 83,021 | $403,000 | 0.00% |
| ROYCE & ASSOCIATES LP | 71,880 | $349,000 | 0.00% |