0001104659-21-121770.txt : 20211001 0001104659-21-121770.hdr.sgml : 20211001 20211001120648 ACCESSION NUMBER: 0001104659-21-121770 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210930 FILED AS OF DATE: 20211001 DATE AS OF CHANGE: 20211001 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Klofas Michael L CENTRAL INDEX KEY: 0001676043 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-32472 FILM NUMBER: 211297844 MAIL ADDRESS: STREET 1: 64 WINDHAM DRIVE CITY: EAST LONGMEADOW STATE: MA ZIP: 01028 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: DAWSON GEOPHYSICAL CO CENTRAL INDEX KEY: 0000799165 STANDARD INDUSTRIAL CLASSIFICATION: OIL AND GAS FIELD EXPLORATION SERVICES [1382] IRS NUMBER: 742095844 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 508 WEST WALL STREET 2: SUITE 800 CITY: MIDLAND STATE: TX ZIP: 79701 BUSINESS PHONE: 4326843000 MAIL ADDRESS: STREET 1: 508 WEST WALL STREET 2: SUITE 800 CITY: MIDLAND STATE: TX ZIP: 79701 FORMER COMPANY: FORMER CONFORMED NAME: TGC INDUSTRIES INC DATE OF NAME CHANGE: 19920703 4 1 tm2129025-2_4seq1.xml OWNERSHIP DOCUMENT X0306 4 2021-09-30 0 0000799165 DAWSON GEOPHYSICAL CO DWSN 0001676043 Klofas Michael L 64 WINDHAM DRIVE EAST LONGMEADOW MA 01028 1 0 0 0 Dawson Geophysical Company-Common Stock $0.01 par value 2021-09-30 4 A 0 2988 0 A 39651 D Michael L Klofas 2021-10-01