X0306 4 2016-06-01 0 0000866609 ION GEOPHYSICAL CORP IO 0001596114 HULME COLIN 2105 CITYWEST BOULEVARD SUITE 400 HOUSTON TX 77042 0 1 0 0 EVP, Ocean Bottom Services Common Stock 2016-06-01 4 A 0 6000 0.00 A 29703 D Restricted Stock grant issued pursuant to the ION Geophysical Corporation 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. Rebecca F. Sacco, attorney-in-fact 2016-06-02