X0306 4 2016-12-19 0 0000866609 ION GEOPHYSICAL CORP IO 0001072813 LAPEYRE JAMES M JR 2105 CITYWEST BOULEVARD SUITE 100 HOUSTON TX 77042-2855 1 0 1 0 Common Stock 2016-12-19 4 P 0 10800 7.1626 A 958209 I Shares held by Laitram, LLC Common Stock 2016-12-20 4 P 0 11000 7.0751 A 969209 I Shares held by Laitram, LLC Common Stock 157773 D 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) Open market purchase pursuant to a 10b5-1 trading plan adopted by the Reporting Person, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. This transaction was executed in multiple trades at prices ranging from $7.05 to $7.275, inclusive. The price set forth above reflects the weighted-average price per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades at prices ranging from $7.00 to $7.20, inclusive. The price set forth above reflects the weighted-average price per share. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. The Reporting Person disclaims beneficial ownership of all securities shown as indirectly owned by him. Rebecca F. Sacco, attorney-in-fact 2016-12-21