X0202 4 2007-08-15 0 0000866609 INPUT OUTPUT INC IO 0001072813 LAPEYRE JAMES M JR 2105 CITYWEST BOULEVARD SUITE 400 HOUSTON TX 77042-2839 1 0 0 0 Common stock 2007-08-15 4 P 0 300 12.91 A 879243 D Common stock 2007-08-15 4 P 0 4400 12.916 A 883643 D Common stock 2007-08-15 4 P 0 900 12.92 A 884543 D Common stock 2007-08-15 4 P 0 800 12.93 A 885343 D Common stock 2007-08-15 4 P 0 1900 12.94 A 887243 D Common stock 2007-08-15 4 P 0 12100 12.95 A 899343 D Common stock 2007-08-15 4 P 0 2400 12.956 A 901743 D Common stock 2007-08-15 4 P 0 100 12.96 A 901843 D Common stock 2007-08-15 4 P 0 3300 12.966 A 905143 D Common stock 2007-08-15 4 P 0 1100 12.97 A 906243 D Common stock 2007-08-15 4 P 0 600 12.98 A 906843 D Common stock 2007-08-15 4 P 0 2100 12.99 A 908943 D Common stock 7905344 I Shares held by Laitram, LLC Common stock 10500 I Shares held in joint account with wife. Common stock 10500 I As co-trustee for children. Common stock 105280 I By child. Common stock 105280 I By child. Common stock 105280 I By child. The reporting person has elected pursuant to Instruction 4(b)(iv) to Form 4, to report the entire amount of the interest of Laitram, L.L.C. and disclaims beneficial ownership of such shares except to the extent of his proportionate pecuniary interest therein. This Form 4 reflects holdings by Reporting Person's adult child. The reporting person disclaims beneficial ownership of all securities shown as indirectly owned by him. /s/ Debra A. Addington, attorney-in-fact 2007-08-15