<SEC-DOCUMENT>0001047469-18-000833-index.html : 20180215 <SEC-HEADER>0001047469-18-000833.hdr.sgml : 20180215 <ACCEPTANCE-DATETIME>20180215170437 ACCESSION NUMBER: 0001047469-18-000833 CONFORMED SUBMISSION TYPE: 424B5 PUBLIC DOCUMENT COUNT: 3 FILED AS OF DATE: 20180215 DATE AS OF CHANGE: 20180215 FILER: 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 FILING VALUES: FORM TYPE: 424B5 SEC ACT: 1933 Act SEC FILE NUMBER: 333-213769 FILM NUMBER: 18618498 BUSINESS ADDRESS: STREET 1: 2105 CITYWEST BLVD STREET 2: SUITE 100 CITY: HOUSTON STATE: TX ZIP: 770422855 BUSINESS PHONE: 281.933.3339 MAIL ADDRESS: STREET 1: 2105 CITYWEST BLVD STREET 2: SUITE 100 CITY: HOUSTON STATE: TX ZIP: 770422855 FORMER COMPANY: FORMER CONFORMED NAME: INPUT OUTPUT INC DATE OF NAME CHANGE: 19930328 </SEC-HEADER> <DOCUMENT> <TYPE>424B5 <SEQUENCE>1 <FILENAME>a2234551z424b5.htm <DESCRIPTION>424B5 <TEXT> Document 1 - file: a2234551z424b5.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>2 <FILENAME>g63000.jpg <DESCRIPTION>G63000.JPG <TEXT> Document 2 - file: g63000.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>g812408.jpg <DESCRIPTION>G812408.JPG <TEXT> Document 3 - file: g812408.jpg
</DOCUMENT> </SEC-DOCUMENT>