X0303 4 2010-11-29 0 0000866609 ION GEOPHYSICAL CORP IO 0001286832 ROLAND DAVID L 2105 CITYWEST BOULEVARD SUITE 400 HOUSTON TX 77042-2839 0 1 0 0 SVP-Gen Counsel & Corp Sec'y Common stock 2010-11-29 4 M 0 7500 3.00 A 81879 D Common stock 2010-11-29 4 S 0 9830 6.8781 D 72049 D Common stock 2010-12-01 4 A 0 10000 0.00 A 82049 D Common stock 2010-12-01 4 F 0 4409 7.66 D 77640 D Exmployee stock option (option to purchase 3.00 2010-11-29 4 M 0 7500 0.00 D 2009-12-01 2018-12-01 Common stock 7500 22500 D 7500 in connection with cashless exercise; 2330 open market sale. Issued pursuant to the ION Geophysical Corporation 2004 Long-term Incentive Plan. /s/ Debra A. Addington, attorney-in-fact 2010-12-01