X0306 4 2016-03-01 0 0000866609 ION GEOPHYSICAL CORP IO 0001072813 LAPEYRE JAMES M JR 2105 CITYWEST BOULEVARD SUITE 400 HOUSTON TX 77042-2839 1 0 0 0 Common Stock 2016-03-01 4 A 0 2500 0.00 A 112773 D Common Stock 581309 I Shares held by Laitram, LLC Common Stock 699 I Co-Trustee for Children Common Stock 32850 I Joint account with adult child (J) Common Stock 32850 I Joint account with adult child (K) Common Stock 33702 I Joint account with adult child (S) Restricted stock grant issued pursuant to the ION Geophysical Corporation Amended and Restated 2013 Long Term Incentive Plan. Award will vest upon the one year anniversary of the date shown in Column 2. As adjusted for the one-for-fifteen reverse stock split completed on 02/04/2016. The reporting person disclaims beneficial ownership of all securities shown as indirectly owned by him. Rebecca F. Sacco, attorney-in-fact 2016-03-03