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Feb 8, 2022 04:00PM Form SC 13G/A DAWSON GEOPHYSICAL CO Filed by: DIMENSIONAL FUND ADVISORS LP
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Dec 10, 2020 04:13PM Form SC 13G/A DAWSON GEOPHYSICAL CO Filed by: GATE CITY CAPITAL MANAGEMENT, LLC
Oct 19, 2020 06:03AM
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Feb 12, 2020 10:45AM Form SC 13G/A DAWSON GEOPHYSICAL CO Filed by: DIMENSIONAL FUND ADVISORS LP
Feb 3, 2020 04:55PM
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Feb 8, 2019 06:09AM Form SC 13G DAWSON GEOPHYSICAL CO Filed by: BlackRock Inc.
Jan 25, 2019 05:13PM
Feb 14, 2018 06:16AM
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Feb 1, 2018 06:14AM
Jul 10, 2017 02:17PM
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Feb 9, 2017 10:50AM Form SC 13G/A DAWSON OPERATING CO Filed by: DIMENSIONAL FUND ADVISORS LP
Feb 9, 2017 09:37AM
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Aug 2, 2016 04:51PM
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Feb 9, 2016 03:19PM Form SC 13G/A DAWSON OPERATING CO Filed by: DIMENSIONAL FUND ADVISORS LP
Feb 4, 2016 04:52PM
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Feb 12, 2015 04:30PM Form SC 13G DAWSON OPERATING CO Filed by: PARADIGM CAPITAL MANAGEMENT INC/NY
Feb 5, 2015 09:13AM

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