ION GEOPHYSICAL CORP's ticker is IO and the CUSIP is 462044207. A total of 77 filers reported holding ION GEOPHYSICAL CORP in Q1 2018. The put-call ratio across all filers is 0.22 and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q4 2017 | $0 | – | 1 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Alambic Investment Management, L.P. | 166,613 | $4,515,000 | 0.63% |
| Hood River Capital Management LLC | 374,858 | $10,159,000 | 0.57% |
| Gates Capital Management | 861,844 | $23,356,000 | 0.53% |
| Spark Investment Management LLC | 130,800 | $3,544,000 | 0.23% |
| OBERWEIS ASSET MANAGEMENT INC/ | 30,225 | $819,000 | 0.22% |
| CORNERCAP INVESTMENT COUNSEL INC | 29,260 | $793,000 | 0.11% |
| Tibra Equities Europe Ltd | 23,142 | $627,000 | 0.11% |
| EAM Investors, LLC | 21,609 | $586,000 | 0.10% |
| OXFORD ASSET MANAGEMENT LLP | 128,766 | $3,490,000 | 0.07% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 217,805 | $5,903,000 | 0.06% |