<SEC-DOCUMENT>0000866609-19-000062-index.html : 20190531 <SEC-HEADER>0000866609-19-000062.hdr.sgml : 20190531 <ACCEPTANCE-DATETIME>20190531164435 ACCESSION NUMBER: 0000866609-19-000062 CONFORMED SUBMISSION TYPE: SD PUBLIC DOCUMENT COUNT: 2 <RULE> <RULE-NAME>13p-1 <ITEM> <ITEM-NUMBER>1.01 <ITEM-PERIOD>20181231 </ITEM> <ITEM> <ITEM-NUMBER>1.02 <ITEM-PERIOD>20181231 </ITEM> </RULE> FILED AS OF DATE: 20190531 DATE AS OF CHANGE: 20190531 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: SD SEC ACT: 1934 Act SEC FILE NUMBER: 001-12691 FILM NUMBER: 19871049 BUSINESS ADDRESS: STREET 1: 2105 CITYWEST BLVD STREET 2: SUITE 100 CITY: HOUSTON STATE: TX ZIP: 770422855 BUSINESS PHONE: 2819333339 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>SD <SEQUENCE>1 <FILENAME>a2018formsd.htm <DESCRIPTION>SD CY2018 <TEXT> Document 1 - file: a2018formsd.htm
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