Vander Ploeg Mark A
Related Filers (2)
Ownership (28)
4
Thursday, 1/20/2022
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Friday, 10/1/2021
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Friday, 7/2/2021
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Thursday, 1/2/2020
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Tuesday, 10/1/2019
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Monday, 7/1/2019
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Tuesday, 4/2/2019
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Thursday, 1/10/2019
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Thursday, 1/3/2019
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Tuesday, 10/2/2018
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Monday, 7/2/2018
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Monday, 4/2/2018
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/2/2018
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Tuesday, 10/3/2017
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Wednesday, 7/5/2017
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Monday, 4/3/2017
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4/A
Tuesday, 3/14/2017
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/3/2017
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Tuesday, 10/4/2016
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Friday, 7/1/2016
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Wednesday, 4/13/2016
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4/A
Thursday, 12/3/2015
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Wednesday, 12/2/2015
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
4
Thursday, 2/12/2015
DAWSON OPERATING CO: Statement of changes in beneficial ownership of securities
4
Thursday, 2/12/2015
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
3
Thursday, 2/12/2015
DAWSON GEOPHYSICAL CO: Initial statement of beneficial ownership of securities
4
Wednesday, 12/3/2014
DAWSON GEOPHYSICAL CO: Statement of changes in beneficial ownership of securities
3
Friday, 4/4/2014
DAWSON GEOPHYSICAL CO: Initial statement of beneficial ownership of securities