X0603 D/A LIVE 0000866609 ION GEOPHYSICAL CORP 2105 CITYWEST BLVD SUITE 400 HOUSTON TX 770422839 281.933.3339 DELAWARE INPUT OUTPUT INC Corporation true ROBERT P. PEEBLER 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Executive Officer Director CHIEF EXECUTIVE OFFICER AND DIRECTOR R. BRIAN HANSON 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Executive Officer EXECUTIVE VICE PRESIDENT AND CHIEF FINANCIAL OFFICER CHRISTOPHER M. FRIEDEMANN 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Executive Officer SENIOR VICE PRESIDENT, CORPORATE MARKETING DAVID L. ROLAND 2105 CITYWEST BLVD. HOUSTON TX 77042 Executive Officer SENIOR VICE PRESIDENT, GENERAL COUNSEL AND CORPORATE SECRETARY MICHAEL L. MORRISON 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Executive Officer VICE PRESIDENT AND CORPORATE CONTROLLER JAMES M. LAPEYRE, JR. 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director BRUCE S. APPELBAUM 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director THEODORE H. ELLIOT, JR. 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director G. THOMAS MARSH 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director FRANKLIN MYERS 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director S. JAMES NELSON, JR. 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director JOHN N. SEITZ 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director NICHOLAS G. VLAHAKIS 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director GUO YUELIANG 2105 CITYWEST BLVD. SUITE 400 HOUSTON TX 77042 Director Oil and Gas Over $100,000,000 06 true 0000866609-10-000001 2010-03-19 false true false 0 66610701 66610701 0 false 1 0 0 0 true false ION GEOPHYSICAL CORP /s/ David L. Roland David L. Roland Sr. VP, General Counsel and Corporate Secretary 2010-04-05