GEOSPACE TECHNOLOGIES CORP

Q: Jun 30 2026

Q: Mar 31 2026

Q: Dec 31 2025

Q: Dec 31 2025

FY: Sep 30 2025

Q: Jun 30 2025

Q: Mar 31 2025

Q: Dec 31 2024

FY: Sep 30 2024

Q: Jun 30 2024

FY: Sep 30 2022

FY: Sep 30 2023

Q: Mar 31 2024

Q: Dec 31 2023

FY: Sep 30 2023

Q: Jun 30 2023

Q: Mar 31 2023

Q: Dec 31 2022

FY: Sep 30 2022

Q: Jun 30 2022

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Cost Associated with Exit or Disposal Activities

Submission of Matters to a Vote of Security Holders

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Submission of Matters to a Vote of Security Holders

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

2.02,9.01

Other Events

2.02,5.02,8.01,9.01

2.02,5.02,8.01,9.01

5.07

2.02,9.01

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus filed under Rule 424(b)(1)

Free Writing Prospectus

Prospectus Supplement with Pricing Information

Notice of Effectiveness

Registration statement under Securities Act of 1933

Post Effective Amendment to S-8

Prospectus filed under Rule 424(b)(1)

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus filed under Rule 424(b)(1)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Preliminary Proxy Statement

Definitive Proxy Statement

DISCIPLINED GROWTH INVESTORS INC /MN

VANGUARD CAPITAL MANAGEMENT LLC

DISCIPLINED GROWTH INVESTORS INC /MN

VANGUARD CAPITAL MANAGEMENT LLC

VANGUARD GROUP INC

DISCIPLINED GROWTH INVESTORS INC /MN

Giesinger Edgar R. JR.

JUMPER STEPHEN C

Wheeler Walter R.

Miles Richard F

DAVIS THOMAS L

Ashworth Margaret

VANGUARD GROUP INC

Bushey Ronald Todd

Curda Robert L.

Kelley Richard James

Bushey Ronald Todd

Curda Robert L.

Kelley Richard James

Bushey Ronald Todd

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC