0001437749-21-027880.txt : 20211203 0001437749-21-027880.hdr.sgml : 20211203 20211203180522 ACCESSION NUMBER: 0001437749-21-027880 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20211201 FILED AS OF DATE: 20211203 DATE AS OF CHANGE: 20211203 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Usher Christopher Theron CENTRAL INDEX KEY: 0001481492 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-12691 FILM NUMBER: 211471393 MAIL ADDRESS: STREET 1: 2105 CITYWEST BLVD. STREET 2: SUITE 100 CITY: HOUSTON STATE: TX ZIP: 77042-2855 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 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 4 1 rdgdoc.xml FORM 4 X0306 4 2021-12-01 0000866609 ION GEOPHYSICAL CORP IO 0001481492 Usher Christopher Theron 2105 CITYWEST BLVD., SUITE 100 HOUSTON TX 77042 1 1 President & CEO Common Stock 2021-12-01 4 F 0 8639 1.74 D 341749 D These shares were not sold, but were withheld by ION Geophysical Corporation upon the vesting of restricted stock shares to satisfy tax withholding obligations. /s/ Rebecca F. Sacco, attorney-in-fact 2021-12-03