X0306 4 2017-12-01 0 0000866609 ION GEOPHYSICAL CORP IO 0001716798 POWERS MATTHEW R 2105 CITYWEST BLVD., SUITE 100 HOUSTON TX 77042 0 1 0 0 EVP, Gen Coun & Corp Secy Common Stock 2017-12-01 4 A 0 12000 0.00 A 14282 D Employee Stock Option (right to buy) 13.15 2018-12-01 2028-12-01 Common Stock 36000 36000 D Restricted Stock grant issued pursuant to the ION Geophysical Corporation Second Amended and Restated 2013 Long Term Incentive Plan. Shares will vest in three equal annual installments beginning the first anniversary of the transaction date in Column 2. Issued pursuant to the ION Geophysical Corporation Second Amended and Restated 2013 Long Term Incentive Plan and becomes exercisable in four equal annual installments beginning on the date specified in Column 6. Rebecca F. Sacco, attorney-in-fact 2017-12-05