0001209191-11-045017.txt : 20110819 0001209191-11-045017.hdr.sgml : 20110819 20110819145819 ACCESSION NUMBER: 0001209191-11-045017 CONFORMED SUBMISSION TYPE: 3/A PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20101216 FILED AS OF DATE: 20110819 DATE AS OF CHANGE: 20110819 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Williamson Ken CENTRAL INDEX KEY: 0001507574 FILING VALUES: FORM TYPE: 3/A SEC ACT: 1934 Act SEC FILE NUMBER: 001-12691 FILM NUMBER: 111047153 MAIL ADDRESS: STREET 1: 2105 CITYWEST BLVD. STREET 2: SUITE 400 CITY: HOUSTON STATE: TX ZIP: 77042-2839 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: ION GEOPHYSICAL CORP CENTRAL INDEX KEY: 0000866609 STANDARD INDUSTRIAL CLASSIFICATION: OIL AND GAS FIELD EXPLORATION SERVICES [1382] IRS NUMBER: 222286646 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 2105 CITYWEST BLVD STREET 2: SUITE 400 CITY: HOUSTON STATE: TX ZIP: 770422839 BUSINESS PHONE: 281.933.3339 MAIL ADDRESS: STREET 1: 2105 CITYWEST BLVD STREET 2: SUITE 400 CITY: HOUSTON STATE: TX ZIP: 770422839 FORMER COMPANY: FORMER CONFORMED NAME: INPUT OUTPUT INC DATE OF NAME CHANGE: 19930328 3/A 1 doc3a.xml FORM 3/A SUBMISSION X0204 3/A 2010-12-16 2010-12-23 0 0000866609 ION GEOPHYSICAL CORP IO 0001507574 Williamson Ken 2105 CITYWEST BOULEVARD SUITE 400 HOUSTON TX 77042-2839 0 1 0 0 SVP, ISS Common Stock 59178 D Reflects an additional 15,203 shares held in a separate brokerage account that were inadvertently omitted from the original Form 3 filing. /s/ Debra A. Addington, attorney-in-fact 2011-08-19