0001209191-21-001051.txt : 20210105 0001209191-21-001051.hdr.sgml : 20210105 20210105162134 ACCESSION NUMBER: 0001209191-21-001051 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20201231 FILED AS OF DATE: 20210105 DATE AS OF CHANGE: 20210105 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Williamson Ken CENTRAL INDEX KEY: 0001507574 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-12691 FILM NUMBER: 21505851 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 doc4.xml FORM 4 SUBMISSION X0306 4 2020-12-31 0 0000866609 ION GEOPHYSICAL CORP IO 0001507574 Williamson Ken 2105 CITYWEST BOULEVARD SUITE 100 HOUSTON TX 77042-2855 0 1 0 0 EVP&COO, E&P TECHNO & SERVICES Common Stock 2020-12-31 4 J 0 533 0.00 D 164108 D On December 31, 2020, Mr. Williamson surrendered 533 shares of Common Stock to the Issuer that were held at the transfer agent. This was not a sale or an open market transaction. This was done by Mr. Williamson for year-end tax planning purposes. /s/ Rebecca F. Sacco, attorney-in-fact 2021-01-05