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Ownership Document |
Schema Version: X0303 |
Document Type: 4/A |
Period of Report: 8/20/08 |
Date of Original Submission: 8/21/08 |
Not Subject to Section 16: 1 |
Issuer: |
| Issuer CIK: 866609 |
| Issuer Name: ION GEOPHYSICAL CORP |
| Issuer Trading Symbol: IO |
Reporting Owner: |
| Reporting Owner ID: |
| | Owner CIK: 1228220 |
| | Owner Name: SMITH SAM K |
| Reporting Owner Address: |
| | Owner Street 1: 2105 CITYWEST BOULEVARD |
| | Owner Street 2: SUITE 400 |
| | Owner City: HOUSTON |
| | Owner State: TX |
| | Owner ZIP Code: 77042-2839 |
| | Owner State Description: |
| Reporting Owner Relationship: |
| | Is Director? No |
| | Is Officer? No |
| | Is Ten Percent Owner? No |
| | Is Other? Yes |
| | Other Text: Former Director |
Non-Derivative Table: |
| Non-Derivative Transaction: |
| | Security Title: |
| | | Value: Common Stock |
| | Transaction Date: |
| | | Value: 8/20/08 |
| | Deemed Execution Date: |
| | Transaction Coding: |
| | | Transaction Form Type: 4 |
| | | Transaction Code: S |
| | | Equity Swap Involved? No |
| | Transaction Timeliness: |
| | | Value: |
| | Transaction Amounts: |
| | | Transaction Shares: |
| Value: 5,000 |
| | | Transaction Price Per Share: |
| Value: 15.90 |
| | | Transaction Acquired-Disposed Code: |
| Value: D |
| | Post-Transaction Amounts: |
| | | Shares Owned Following Transaction: |
| Value: 10,754 |
| | Ownership Nature: |
| | | Direct or Indirect Ownership: |
| Value: D |
| Non-Derivative Transaction: |
| | Security Title: |
| | | Value: Common Stock |
| | Transaction Date: |
| | | Value: 8/21/08 |
| | Deemed Execution Date: |
| | Transaction Coding: |
| | | Transaction Form Type: 4 |
| | | Transaction Code: S |
| | | Equity Swap Involved? No |
| | Transaction Timeliness: |
| | | Value: |
| | Transaction Amounts: |
| | | Transaction Shares: |
| Value: 8,900 |
| | | Transaction Price Per Share: |
| Value: 15.90 |
| | | Transaction Acquired-Disposed Code: |
| Value: D |
| | Post-Transaction Amounts: |
| | | Shares Owned Following Transaction: |
| Value: 1,854 |
| | Ownership Nature: |
| | | Direct or Indirect Ownership: |
| Value: D |
Footnotes: |
Remarks: |
Owner Signature: |
| Signature Name: /s/ Debra A. Addington, Attorney-in-fact |
| Signature Date: 8/21/08 |