Geospace Technologies Corp SEC filings GEOS
Geospace Technologies Corp has 1,000 filings in SEC EDGAR's recent list, going back to Feb 6, 1998. Its latest annual report, Form 10-K, was filed on Nov 21, 2025 for the period ended Sep 30, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 7, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Nov 3, 2026 (material agreement, agreement ended, new debt). The company's fiscal year ends on September 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 7, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 31, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| 4 | Insider transaction | Feb 9, 2026 | Feb 9, 2026 |
| 4 | Insider transaction | Feb 9, 2026 | Feb 9, 2026 |
| 4 | Insider transaction | Feb 9, 2026 | Feb 9, 2026 |
| 4 | Insider transaction | Feb 9, 2026 | Feb 9, 2026 |
| 4 | Insider transaction | Feb 9, 2026 | Feb 9, 2026 |
| 4 | Insider transaction | Feb 9, 2026 | Feb 9, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 30, 2026 | — |
| 4 | Insider transaction | Dec 5, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 5, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 5, 2025 | Dec 5, 2025 |
| 4/A | Form 4/a | Dec 5, 2025 | Nov 20, 2025 |
| 4 | Insider transaction | Dec 1, 2025 | Nov 25, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 20, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 20, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 20, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 30, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 9, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 17, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 11, 2025 | — |
| 4 | Insider transaction | Feb 7, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 7, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 7, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 7, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 7, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 7, 2025 | Feb 6, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 23, 2025 | — |
| 3 | Initial insider ownership | Dec 11, 2024 | Dec 2, 2024 |
| 4 | Insider transaction | Nov 22, 2024 | Nov 21, 2024 |
| 4 | Insider transaction | Nov 22, 2024 | Nov 21, 2024 |
| 4 | Insider transaction | Nov 22, 2024 | Nov 21, 2024 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Oct 22, 2024 | — |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| 3/A | Form 3/a | May 9, 2024 | Apr 29, 2024 |
| 3 | Initial insider ownership | May 9, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | Feb 27, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 144 | Notice of proposed sale | Feb 21, 2024 | — |
| 4/A | Form 4/a | Feb 21, 2024 | Feb 14, 2024 |
| 4 | Insider transaction | Feb 21, 2024 | Feb 14, 2024 |
| 144 | Notice of proposed sale | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| 4 | Insider transaction | Feb 8, 2024 | Feb 7, 2024 |
| 4 | Insider transaction | Feb 8, 2024 | Feb 7, 2024 |
| 4 | Insider transaction | Feb 8, 2024 | Feb 7, 2024 |
| 4 | Insider transaction | Feb 8, 2024 | Feb 7, 2024 |
| 4 | Insider transaction | Feb 8, 2024 | Feb 7, 2024 |
| 4 | Insider transaction | Feb 8, 2024 | Feb 7, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 1, 2024 | — |
| 3 | Initial insider ownership | Dec 22, 2023 | Dec 21, 2023 |
| 4 | Insider transaction | Nov 17, 2023 | Nov 16, 2023 |
| 4 | Insider transaction | Nov 17, 2023 | Nov 16, 2023 |
| 4 | Insider transaction | Nov 17, 2023 | Nov 16, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 10, 2023 | — |
| 4 | Insider transaction | Feb 22, 2023 | Feb 17, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2023 | — |
| 4/A | Form 4/a submission | Feb 10, 2023 | Feb 9, 2023 |
| 4 | Insider transaction | Feb 10, 2023 | Feb 9, 2023 |
| 4 | Insider transaction | Feb 10, 2023 | Feb 9, 2023 |
| 4 | Insider transaction | Feb 10, 2023 | Feb 9, 2023 |
| 4 | Insider transaction | Feb 10, 2023 | Feb 9, 2023 |
| 4 | Insider transaction | Feb 10, 2023 | Feb 9, 2023 |
| 4 | Insider transaction | Feb 10, 2023 | Feb 9, 2023 |
| SC 13G | Ownership over 5% (passive) | Jan 25, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Jan 10, 2023 | — |
| 4 | Insider transaction | Nov 21, 2022 | Nov 21, 2022 |
| 4 | Insider transaction | Nov 21, 2022 | Nov 21, 2022 |
| 4 | Insider transaction | Nov 21, 2022 | Nov 21, 2022 |
| 4 | Insider transaction | Nov 21, 2022 | Nov 21, 2022 |
| 4 | Insider transaction | Sep 7, 2022 | Sep 2, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Aug 30, 2022 |
| 4 | Insider transaction | Aug 23, 2022 | Aug 19, 2022 |
| 4 | Insider transaction | Aug 17, 2022 | Aug 15, 2022 |
| 4 | Insider transaction | May 19, 2022 | May 17, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | May 10, 2022 | — |
| 4 | Insider transaction | Feb 28, 2022 | Feb 25, 2022 |
| 4 | Insider transaction | Feb 25, 2022 | Feb 23, 2022 |
| 4 | Insider transaction | Feb 24, 2022 | Feb 22, 2022 |
| 4 | Insider transaction | Feb 17, 2022 | Feb 17, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 15, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 8, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2022 | — |
| 4 | Insider transaction | Feb 3, 2022 | Feb 2, 2022 |
| 4 | Insider transaction | Feb 3, 2022 | Feb 2, 2022 |
| 4 | Insider transaction | Feb 3, 2022 | Feb 2, 2022 |
| 4 | Insider transaction | Feb 3, 2022 | Feb 2, 2022 |
| 4 | Insider transaction | Feb 3, 2022 | Feb 2, 2022 |
| 4 | Insider transaction | Feb 3, 2022 | Feb 2, 2022 |
| 4 | Insider transaction | Feb 3, 2022 | Feb 2, 2022 |
| 4 | Insider transaction | Nov 22, 2021 | Nov 18, 2021 |
| 4 | Insider transaction | Nov 22, 2021 | Nov 18, 2021 |
| 4 | Insider transaction | Nov 22, 2021 | Nov 18, 2021 |
| 4 | Insider transaction | Nov 22, 2021 | Nov 18, 2021 |
| 4 | Insider transaction | Aug 12, 2021 | Aug 12, 2021 |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2021 | — |
| 4 | Insider transaction | Feb 5, 2021 | Feb 4, 2021 |
| 4 | Insider transaction | Feb 5, 2021 | Feb 4, 2021 |
| 4 | Insider transaction | Feb 5, 2021 | Feb 4, 2021 |
| 4 | Insider transaction | Feb 5, 2021 | Feb 4, 2021 |
| 4 | Insider transaction | Feb 5, 2021 | Feb 4, 2021 |
| 4 | Insider transaction | Feb 5, 2021 | Feb 4, 2021 |
| 4 | Insider transaction | Feb 5, 2021 | Feb 4, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 8, 2021 | — |
| 4 | Insider transaction | Dec 11, 2020 | Dec 10, 2020 |
| 4 | Insider transaction | Dec 11, 2020 | Dec 9, 2020 |
| 4 | Insider transaction | Dec 2, 2020 | Dec 1, 2020 |
| 3 | Initial insider ownership | Dec 1, 2020 | Dec 1, 2020 |
| 3 | Initial insider ownership | Dec 1, 2020 | Dec 1, 2020 |
| 4 | Insider transaction | Nov 30, 2020 | Nov 25, 2020 |
| 4 | Insider transaction | Nov 27, 2020 | Nov 24, 2020 |
| 4 | Insider transaction | Nov 20, 2020 | Nov 19, 2020 |
| 4 | Insider transaction | Nov 20, 2020 | Nov 19, 2020 |
| 4 | Insider transaction | Nov 20, 2020 | Nov 19, 2020 |
| 4 | Insider transaction | Nov 20, 2020 | Nov 19, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Sep 9, 2020 | — |
| SC 13D/A | Amended ownership over 5% (active) | Aug 26, 2020 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jul 15, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jul 10, 2020 | — |
| SC 13D | Ownership over 5% (active) | May 27, 2020 | — |
| SC 13G | Ownership over 5% (passive) | May 18, 2020 | — |
| 4 | Insider transaction | May 15, 2020 | May 14, 2020 |
| 4 | Insider transaction | May 14, 2020 | May 13, 2020 |
| 4 | Insider transaction | May 14, 2020 | May 13, 2020 |
| 4 | Insider transaction | May 13, 2020 | May 12, 2020 |
| 4 | Insider transaction | Apr 6, 2020 | Apr 6, 2020 |
| SC 13D | Ownership over 5% (active) | Feb 18, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2020 | — |
| 4 | Insider transaction | Feb 7, 2020 | Feb 6, 2020 |
| 4 | Insider transaction | Feb 7, 2020 | Feb 6, 2020 |
| 4 | Insider transaction | Feb 7, 2020 | Feb 6, 2020 |
| 4 | Insider transaction | Feb 7, 2020 | Feb 6, 2020 |
| 4 | Insider transaction | Feb 7, 2020 | Feb 6, 2020 |
| 4 | Insider transaction | Feb 7, 2020 | Feb 6, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2020 | — |
| 4 | Insider transaction | Feb 7, 2020 | Feb 6, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 21, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 10, 2020 | — |
| 3 | Initial insider ownership | Jan 6, 2020 | Jan 1, 2020 |
| 4 | Insider transaction | Dec 5, 2019 | Dec 3, 2019 |
| 4 | Insider transaction | Nov 26, 2019 | Nov 26, 2019 |
| 4 | Insider transaction | Nov 26, 2019 | Nov 26, 2019 |
| 4 | Insider transaction | Nov 26, 2019 | Nov 26, 2019 |
| 4/A | Form 4/a submission | Nov 26, 2019 | Nov 21, 2019 |
| 4 | Insider transaction | Nov 22, 2019 | Nov 21, 2019 |
| 4 | Insider transaction | Nov 22, 2019 | Nov 21, 2019 |
| 4 | Insider transaction | Nov 22, 2019 | Nov 21, 2019 |
| 4 | Insider transaction | Nov 22, 2019 | Nov 21, 2019 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2019 | — |
| SC 13D/A | Amended ownership over 5% (active) | Feb 8, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Feb 8, 2019 | — |
| 4 | Insider transaction | Feb 7, 2019 | Feb 6, 2019 |
| 4 | Insider transaction | Feb 7, 2019 | Feb 6, 2019 |
| 4 | Insider transaction | Feb 7, 2019 | Feb 6, 2019 |
| 4 | Insider transaction | Feb 7, 2019 | Feb 6, 2019 |
| 4 | Insider transaction | Feb 7, 2019 | Feb 6, 2019 |
| 4 | Insider transaction | Feb 7, 2019 | Feb 6, 2019 |
| 4 | Insider transaction | Feb 7, 2019 | Feb 6, 2019 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 28, 2019 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 12, 2018 | — |
| 4 | Insider transaction | Dec 7, 2018 | Dec 6, 2018 |
| 4 | Insider transaction | Nov 28, 2018 | Nov 27, 2018 |
| 4 | Insider transaction | Nov 28, 2018 | Nov 27, 2018 |
| 4 | Insider transaction | Nov 28, 2018 | Nov 27, 2018 |
| 4 | Insider transaction | Nov 28, 2018 | Nov 27, 2018 |
| 4/A | Form 4/a submission | Sep 11, 2018 | Sep 7, 2018 |
| 4 | Insider transaction | Sep 11, 2018 | Sep 7, 2018 |
| SC 13G/A | Amended ownership over 5% (passive) | Jun 8, 2018 | — |
| SC 13D/A | Amended ownership over 5% (active) | May 15, 2018 | — |
| SC 13G | Ownership over 5% (passive) | Apr 23, 2018 | — |
| SC 13D | Ownership over 5% (active) | Apr 3, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 15, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2018 | — |
| 4 | Insider transaction | Feb 8, 2018 | Feb 7, 2018 |
| 4 | Insider transaction | Feb 8, 2018 | Feb 7, 2018 |
| 4 | Insider transaction | Feb 8, 2018 | Feb 7, 2018 |
| 4 | Insider transaction | Feb 8, 2018 | Feb 7, 2018 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Measuring & Controlling Devices, NEC (SIC 3829)
- Listed as
- GEOS (Nasdaq)
- Fiscal year ends
- September 30
- Incorporated in
- TX
- Headquarters
- Houston, TX
- SEC filer status
- Accelerated filer, Smaller reporting company
- SEC CIK
- 1001115
- Former names
- OYO GEOSPACE CORP (until Oct 1, 2012)
Other Measuring & Controlling Devices, NEC companies
- Thermo Fisher Scientific Inc. TMO
- Rockwell Automation, Inc ROK
- Trimble Inc. TRMB
- Onto Innovation Inc. ONTO
- Mirion Technologies, Inc. MIR
- Quantum-Si Inc QSI
- Owlet, Inc. OWLT
- Birchtech Corp. BCHT
Source: SEC EDGAR filings. This is company-reported data, not investment advice.