<SEC-DOCUMENT>0001037389-19-000055-index.html : 20190212 <SEC-HEADER>0001037389-19-000055.hdr.sgml : 20190212 <ACCEPTANCE-DATETIME>20190212161800 ACCESSION NUMBER: 0001037389-19-000055 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20190212 DATE AS OF CHANGE: 20190212 SUBJECT COMPANY: 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: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-41602 FILM NUMBER: 19591045 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 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: RENAISSANCE TECHNOLOGIES LLC CENTRAL INDEX KEY: 0001037389 IRS NUMBER: 260385758 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 800 THIRD AVE CITY: NEW YORK STATE: NY ZIP: 10022 BUSINESS PHONE: 2124866780 MAIL ADDRESS: STREET 1: 800 THIRD AVE CITY: NEW YORK STATE: NY ZIP: 10022 FORMER COMPANY: FORMER CONFORMED NAME: RENAISSANCE TECHNOLOGIES CORP DATE OF NAME CHANGE: 19990324 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G <SEQUENCE>1 <FILENAME>io-13g_20181231.txt <TEXT> Document 1 - file: io-13g_20181231.txt
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