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Pinnacle Summer Investments, Inc.
> IO
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2015 | ION GEOPHYSICAL CORP | IO | 5,000 | 0 | 3,000 | 1,000 | $0.60 |
| 09/30/2015 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 2,000 | 2,000 | $0.40 |
| 06/30/2015 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 5,000 | 5,000 | $1.00 |
| 03/31/2015 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 11,000 | 11,000 | $2.20 |
| 12/31/2014 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 11,000 | 11,000 | $2.20 |
| 09/30/2014 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 14,000 | 14,000 | $2.80 |
| 06/30/2014 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 20,000 | 20,000 | $4.00 |
| 03/31/2014 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 22,000 | 22,000 | $4.40 |
| 12/31/2013 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 17,000 | 17,000 | $3.40 |
| 09/30/2013 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 26,000 | 26,000 | $5.20 |
| 06/30/2013 | ION GEOPHYSICAL CORP | IO | 5,000 | 0 | 30,000 | -4,000 | $6.00 |
| 03/31/2013 | ION GEOPHYSICAL CORP | IO | 5,000 | 0 | 34,000 | 1,000 | $6.80 |
| 12/31/2012 | ION GEOPHYSICAL CORP | IO | 5,000 | 0 | 33,000 | -2,000 | $6.60 |
| 09/30/2012 | ION GEOPHYSICAL CORP | IO | 5,000 | 0 | 35,000 | 2,000 | $7.00 |
| 06/30/2012 | ION GEOPHYSICAL CORP | IO | 5,000 | 0 | 33,000 | 1,000 | $6.60 |
| 03/31/2012 | ION GEOPHYSICAL CORP | IO | 5,000 | 0 | 32,000 | -6,000 | $6.40 |
| 12/31/2011 | ION GEOPHYSICAL CORP | IO | 5,000 | 0 | 31,000 | -7,000 | $6.20 |
| 09/30/2011 | ION GEOPHYSICAL CORP | IO | 5,000 | 5,000 | 38,000 | 38,000 | $7.60 |
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