0001104659-21-088642.txt : 20210702 0001104659-21-088642.hdr.sgml : 20210702 20210702101242 ACCESSION NUMBER: 0001104659-21-088642 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210630 FILED AS OF DATE: 20210702 DATE AS OF CHANGE: 20210702 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Vander Ploeg Mark A CENTRAL INDEX KEY: 0001604461 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-32472 FILM NUMBER: 211068340 MAIL ADDRESS: STREET 1: 1360 ELDER AVENUE CITY: MENLO PARK STATE: CA ZIP: 94025 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 tm2121282-4_4seq1.xml OWNERSHIP DOCUMENT X0306 4 2021-06-30 0 0000799165 DAWSON GEOPHYSICAL CO DWSN 0001604461 Vander Ploeg Mark A 1360 ELDER AVENUE MENLO PARK CA 94025 1 0 0 0 Dawson Geophysical Company-Common Stock $0.01 par value 2021-06-30 4 A 0 2830 0 A 28111 D Dawson Geophysical Company-Common Stock $0.01 par value 36792 I Through the Hermosa Trust dated November 3, 2015. Held through the Hermosa Trust, of which the insider and his wife are trustees and beneficiaries. Mark A. Vander Ploeg 2021-07-02