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Nov 14, 2025 03:50PM Form SCHEDULE 13G/A GEOSPACE TECHNOLOGIES Filed by: DISCIPLINED GROWTH INVESTORS INC /MN
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Feb 11, 2025 11:44AM Form SCHEDULE 13G/A GEOSPACE TECHNOLOGIES Filed by: Tieton Capital Management, LLC
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Feb 9, 2024 09:00AM Form SC 13G/A GEOSPACE TECHNOLOGIES Filed by: GATE CITY CAPITAL MANAGEMENT, LLC
Feb 1, 2024 03:55PM
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Jan 10, 2023 04:08PM Form SC 13G GEOSPACE TECHNOLOGIES Filed by: GATE CITY CAPITAL MANAGEMENT, LLC
May 10, 2022 10:13AM
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Feb 16, 2021 05:35PM Form SC 13G GEOSPACE TECHNOLOGIES Filed by: DISCIPLINED GROWTH INVESTORS INC /MN
Feb 12, 2021 03:22PM
Feb 10, 2021 11:12AM
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Sep 9, 2020 03:53PM
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May 18, 2020 03:41PM Form SC 13G GEOSPACE TECHNOLOGIES Filed by: Nierenberg Investment Management Company, Inc.
Feb 12, 2020 11:17AM
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Feb 13, 2019 12:00PM
Feb 11, 2019 11:52AM Form SC 13G/A GEOSPACE TECHNOLOGIES Filed by: VANGUARD GROUP INC
Feb 8, 2019 08:59AM

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