GEOS / Geospace Technologies Corporation - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Geospace Technologies Corporation
US ˙ NasdaqGS ˙ US37364X1090

Mga Batayang Estadistika
CIK 1001115
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Geospace Technologies Corporation
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
September 4, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 29, 2025 GEOSPACE TECHNOLO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 29, 2025 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Com

September 4, 2025 EX-10.1

FIRST AMENDED AND RESTATED CREDIT AGREEMENT GEOSPACE TECHNOLOGIES CORPORATION, GTC, INC., AQUANA, LLC, QUANTUM TECHNOLOGY SCIENCES, INC., GEOVOX SECURITY, INC., TOGETHER WITH EACH OTHER PERSON THAT NOW OR FROM TIME TO TIME BECOMES A PARTY HERETO AS A

Exhibit 10.1 FIRST AMENDED AND RESTATED CREDIT AGREEMENT among GEOSPACE TECHNOLOGIES CORPORATION, GTC, INC., AQUANA, LLC, QUANTUM TECHNOLOGY SCIENCES, INC., GEOVOX SECURITY, INC., and TOGETHER WITH EACH OTHER PERSON THAT NOW OR FROM TIME TO TIME BECOMES A PARTY HERETO AS A BORROWER, as Borrowers, THE GUARANTORS PARTY TO THIS AGREEMENT, WOODFOREST NATIONAL BANK, as Administrative Agent, Swingline L

August 8, 2025 EX-10.1

First Amendment to Credit Agreement dated July 26, 2025 among the Company, and each other person from time to time party thereto as borrower, and Woodforest National Bank, as lender.

Exhibit 10.1 FIRST AMENDMENT TO CREDIT AGREEMENT THIS FIRST AMENDMENT TO CREDIT AGREEMENT (this “Amendment”) is entered into as of July 26, 2025 (the “Effective Date”), among GEOSPACE TECHNOLOGIES CORPORATION, a Texas corporation (“Geospace”), GTC, INC., a Texas corporation (“GTC”), Aquana, LLC, a Vermont limited liability company (“Aquana”), Quantum Technology Sciences, Inc., a Florida corporatio

August 8, 2025 EX-99.1

GEOSPACE TECHNOLOGIES CORPORATION REPORTS PROFITABLE THIRD QUARTER AND NINE-MONTH 2025 EARNINGS

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES CORPORATION REPORTS PROFITABLE THIRD QUARTER AND NINE-MONTH 2025 EARNINGS Houston, Texas – August 7, 2025 – Geospace Technologies Corporation (NASDAQ: GEOS) (“the “Company") today announced results for its third quarter ended June 30, 2025. For the three-months ended June 30, 2025, Geospace reported revenue of $24.8 million, com

August 8, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2025 GEOSPACE TECHNOLOG

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2025 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

August 8, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended June 30, 2025 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TE

May 21, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 7007 Pinemont Drive Houston, Texas 77040-6601 (Ad

May 9, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2025 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commiss

May 9, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended March 31, 2025 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE T

May 9, 2025 EX-99.1

GEOSPACE TECHNOLOGIES CORPORATION REPORTS SECOND QUARTER AND SIX-MONTH 2025 EARNINGS

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES CORPORATION REPORTS SECOND QUARTER AND SIX-MONTH 2025 EARNINGS Houston, Texas – May 8, 2025 – Geospace Technologies Corporation (NASDAQ: GEOS) (“the “Company") today announced results for its second quarter ended March 31, 2025. For the three-months ended March 31, 2025, Geospace reported revenue of $18.0 million, compared to re

March 4, 2025 EX-10.1

Employment Agreement between the Company and Richard J. Kelley.

Exhibit 10.1 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this “Agreement”) is made effective as of January 1, 2025 (the “Effective Date”) between Geospace Technologies Corporation, a Texas corporation (the “Company”) and Richard James Kelley (“Employee”), having a mailing address at 139 Lake View Loop, Fulshear, Texas 77441. Each of Company and Employee is referred to as a “Party” and together

March 4, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2025 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

March 4, 2025 EX-10.2

Employment Agreement between the Company and Robert L. Curda.

Exhibit 10.2 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this “Agreement”) is made effective as of January 1, 2025 (the “Effective Date”) between Geospace Technologies Corporation, a Texas corporation (the “Company”) and Robert Louis Curda (“Employee”), having a mailing address at 1423 Castlerock, Houston, Texas 77090. Each of Company and Employee is referred to as a “Party” and together, as t

February 6, 2025 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 6, 2025 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

February 6, 2025 EX-10.1

Employment Termination Agreement dated January 1, 2025 between the Company and Walter R. Wheeler.

Exhibit 10.1 EMPLOYMENT TERMINATION AGREEMENT This Employment Termination Agreement (this “Agreement”) is executed as of December 31st 2024, and effective January 1, 2025 (the “Effective Date”), between Geospace Technologies Corporation (the “Company”) and Walter R. Wheeler (“Mr. Wheeler”). The Company and Mr. Wheeler are sometimes referred to herein individually as a “party” and collectively as t

February 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended December 31, 2024 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPAC

February 5, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 5, 2025 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

February 5, 2025 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS PROFITABLE FIRST QUARTER FOR FISCAL YEAR 2025

Exhibit 99.1 NEWS RELEASE GEOSPACE TECHNOLOGIES REPORTS PROFITABLE FIRST QUARTER FOR FISCAL YEAR 2025 Houston, Texas – February 5, 2025 – Geospace Technologies Corporation (NASDAQ: GEOS) (“the “Company") today announced results for its first quarter ended December 31, 2024. For the three-months ended December 31, 2024, Geospace reported revenue of $37.2 million compared to revenue of $50.0 million

January 10, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 3, 2025 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Com

December 27, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

December 27, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEF 14A 1 geos20241217def14a.htm FORM DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission o

November 26, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 21, 2024 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

November 22, 2024 EX-21.1

Subsidiaries of the Registrant.**

Exhibit 21.1 Subsidiaries of Geospace Technologies Corporation GTC, Inc., a Texas corporation Geospace Technologies Canada, Inc., an Alberta corporation Geospace Technologies Corporation Azerbaijan Branch, an Azerbaijan company Geospace Engineering Resources International, Inc., a Texas corporation Geospace Finance Corp., a Texas corporation Exile Technologies Limited, a United Kingdom company Geo

November 22, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2024 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPORATION (Exact Name of Registrant

November 22, 2024 EX-10.5

Employment Agreement dated April 29, 2024 between Richard Kelley and the Company.**

Exhibit 10.5 THIS EMPLOYMENT AGREEMENT (this “Agreement”) is made effective as of April 29, 2024 (the “Effective Date”) between Geospace Technologies Corporation, a Texas corporation (the “Company”) and Richard Kelley (“Employee”), having a mailing address at 139 Lake View Loop, Fulshear, TX 77441. WHEREAS, the Company considers the establishment and maintenance of a sound and vital management to

November 22, 2024 EX-97.1

Executive Compensation Clawback Policy.**

Exhibit 97.1 GEOSPACE TECHNOLOGIES CORPORATION EXECUTIVE COMPENSATION CLAWBACK POLICY Introduction The Board of Directors (the “Board”) of Geospace Technologies Corporation (the “Company”) believes that it is in the best interests of the Company and its shareholders to create and maintain a culture that emphasizes integrity and accountability and that reinforces the Company's pay-for-performance c

November 22, 2024 EX-19.1

Insider Trading Policy for Employees, Officers and Directors.**

Exhibit 19.1 Insider Trading Policy For Employees, Officers and Directors General Provisions During your employment at Geospace Technologies Corporation (the “Company”), you may obtain access to material, non-public information about the Company’s activities, events, or operations (“Insider Information”). You must keep Insider Information strictly confidential until such information is publicly di

November 21, 2024 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2024 RESULTS Company’s Hydroconn Smart Water Connector Cable Reports Record Setting Year

Exhibit 99.1 NEWS RELEASE GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2024 RESULTS Company’s Hydroconn Smart Water Connector Cable Reports Record Setting Year Houston, Texas – November 21, 2024 – Geospace Technologies Corporation (NASDAQ: GEOS) (“the “Company") today announced a net loss of $6.6 million after fourth quarter non-cash charges of $17.3 million on revenue of $135.6 mi

November 21, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 21, 2024 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

September 19, 2024 EX-99.1

GEOSPACE TECHNOLOGIES REALIGNS BUSINESS SEGMENTS TO REFLECT STRATEGIC FOCUS

Exhibit 99.1 NEWS RELEASE GEOSPACE TECHNOLOGIES REALIGNS BUSINESS SEGMENTS TO REFLECT STRATEGIC FOCUS HOUSTON, TX – September 19, 2024 - Geospace Technologies Corporation (NASDAQ: GEOS) (the “Company”) announces today that beginning in the fiscal year 2025 it will operate under three new business segments: Smart Water, Energy Solutions and Intelligent Industrial. The business segment realignment a

September 19, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 19, 2024 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (

August 9, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended June 30, 2024 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TE

August 8, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2024 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

August 8, 2024 EX-99.1

GEOSPACE TECHNOLOGIES CORPORATION REPORTS THIRD QUARTER AND NINE-MONTH 2024 EARNINGS Company Announces Leadership Transition Plan

Exhibit 99.1 NEWS RELEASE GEOSPACE TECHNOLOGIES CORPORATION REPORTS THIRD QUARTER AND NINE-MONTH 2024 EARNINGS Company Announces Leadership Transition Plan HOUSTON, TX – August 8, 2024 - Geospace Technologies Corporation (NASDAQ: GEOS) (the “Company”) today announced results for its third quarter ended June 30, 2024. For the three-months ended June 30, 2024, Geospace reported revenue of $25.9 mill

July 2, 2024 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A Amendment No. 1

-09-30FY2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A Amendment No. 1 ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2023 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPOR

July 2, 2024 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A Amendment No. 1

-09-30FY2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A Amendment No. 1 ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2022 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPOR

May 21, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 7007 Pinemont Drive Houston, Texas 77040-6601 (Ad

May 10, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended March 31, 2024 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE T

May 9, 2024 EX-99.1

GEOSPACE TECHNOLOGIES CORPORATION REPORTS SECOND QUARTER AND SIX-MONTH 2024 EARNINGS Company Appoints Former Sercel President Richard Kelley as Chief Operating Officer Company Announces Stock Repurchase Program

Exhibit 99.1 NEWS RELEASE DRAFT FOR REVIEW – NOT FOR RELEASE GEOSPACE TECHNOLOGIES CORPORATION REPORTS SECOND QUARTER AND SIX-MONTH 2024 EARNINGS Company Appoints Former Sercel President Richard Kelley as Chief Operating Officer Company Announces Stock Repurchase Program HOUSTON, TX – May 9, 2024 - Geospace Technologies Corporation (NASDAQ: GEOS) (the “Company”) today announced results for its sec

May 9, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2024 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commiss

February 13, 2024 SC 13G

GEOS / Geospace Technologies Corporation / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SC 13G 1 tv01011-geospacetechnologies.htm SCHEDULE 13G SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Geospace Technologies Corp Title of Class of Securities: Common Stock CUSIP Number: 37364X109 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule p

February 9, 2024 SC 13G/A

GEOS / Geospace Technologies Corporation / GATE CITY CAPITAL MANAGEMENT, LLC Passive Investment

SC 13G/A 1 fp0087070-1sc13ga.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 2)* GEOSPACE TECHNOLOGIES CORPORATION (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number)

February 8, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 8, 2024 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

February 8, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended December 31, 2023 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPAC

February 7, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 7, 2024 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

February 7, 2024 EX-99.1

GEOSPACE TECHNOLOGIES CORPORATION REPORTS PROFITABLE FIRST QUARTER OF FISCAL YEAR 2024 AND HIGHEST QUARTERLY REVENUE IN NEARLY TEN YEARS Quarterly Earnings Strengthen by Significant Demand for Newly Released Mariner™ Seismic Data Acquisition Product

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES CORPORATION REPORTS PROFITABLE FIRST QUARTER OF FISCAL YEAR 2024 AND HIGHEST QUARTERLY REVENUE IN NEARLY TEN YEARS Quarterly Earnings Strengthen by Significant Demand for Newly Released Mariner™ Seismic Data Acquisition Product HOUSTON, TX – February 7, 2023 - Geospace Technologies Corporation (NASDAQ: GEOS) (the “Company”) toda

January 3, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

December 21, 2023 EX-99.1

SEISMIC INDUSTRY VETERAN STEPHEN JUMPER JOINS GEOSPACE TECHNOLOGIES BOARD OF DIRECTORS

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE SEISMIC INDUSTRY VETERAN STEPHEN JUMPER JOINS GEOSPACE TECHNOLOGIES BOARD OF DIRECTORS Houston, TX – December 21, 2023 – Geospace Technologies Corporation (NASDAQ: GEOS) today announced the addition of Stephen C. Jumper, former Chairman of the Board, President and CEO of seismic data acquisition provider Dawson Geophysical, to its Board of Directors

December 21, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 21, 2023 GEOSPACE TECHNO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 21, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

November 17, 2023 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS PROFITABLE FOURTH QUARTER AND FISCAL YEAR 2023 RESULTS

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS PROFITABLE FOURTH QUARTER AND FISCAL YEAR 2023 RESULTS Houston, Texas – November 16, 2023 – Geospace Technologies Corporation (NASDAQ: GEOS) (“the “Company") today announced net income of $12.2 million, or $0.92 per diluted share, on revenue of $124.5 million for its fiscal year ended September 30, 2023. This compares wi

November 17, 2023 EX-10.21

Employment Termination and Consulting Agreement dated June 30, 2023 between the Company and Michael J. Sheen. **

Exhibit 10.21 EMPLOYMENT TERMINATION AND CONSULTING AGREEMENT This Employment Termination and Consulting Agreement (this “Agreement”) is executed as of June 30, 2023 between Geospace Technologies Corporation (the “Company”) and Michael J. Sheen (“Mr. Sheen”). The Company and Mr. Sheen are sometimes referred to herein individually as a “party” and collectively as the “parties.” WHEREAS, Mr. Sheen’s

November 17, 2023 EX-21.1

Subsidiaries of the Registrant.**

Exhibit 21.1 Subsidiaries of Geospace Technologies Corporation GTC, Inc., a Texas corporation Geospace Technologies Canada, Inc., an Alberta corporation Geospace Technologies Corporation Azerbaijan Branch, an Azerbaijan company Geospace Engineering Resources International, Inc., a Texas corporation Geospace Finance Corp., a Texas corporation Exile Technologies Limited, a United Kingdom company Geo

November 17, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2023 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPORATION (Exact Name of Registrant

November 17, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 16, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

October 10, 2023 SC 13G/A

GEOS / Geospace Technologies Corp / GATE CITY CAPITAL MANAGEMENT, LLC Passive Investment

SC 13G/A 1 fp0085544-1sc13ga.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 1)* GEOSPACE TECHNOLOGIES CORPORATION (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number)

August 11, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended June 30, 2023 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TE

August 10, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 10, 2023 GEOSPACE TECHNOLO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 10, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Com

August 10, 2023 EX-99.1

GEOSPACE TECHNOLOGIES CORPORATION REPORTS PROFITABLE THIRD QUARTER AND NINE-MONTH 2023 EARNINGS Q3 Produced Highest Quarterly Revenue Recorded in Nine Years

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES CORPORATION REPORTS PROFITABLE THIRD QUARTER AND NINE-MONTH 2023 EARNINGS Q3 Produced Highest Quarterly Revenue Recorded in Nine Years HOUSTON, TX – August 10, 2023 - Geospace Technologies Corporation (NASDAQ: GEOS) (the “Company”) today announced results for its third quarter ended June 30, 2023. For the three-months ended June

August 1, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 26, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commi

August 1, 2023 EX-10.1

Credit Agreement dated July 26, 2023 among the Company, and each other person from time to time party thereto as a borrower, and Woodforest National Bank, as lender

Exhibit 10.1 CREDIT AGREEMENT among GEOSPACE TECHNOLOGIES CORPORATION, GTC, INC., and EACH OTHER PERSON FROM TIME TO TIME PARTY HERETO AS A BORROWER, as Borrowers and WOODFOREST NATIONAL BANK, as Lender As of July 26, 2023 TABLE OF CONTENTS Page SECTION 1 DEFINITIONS AND TERMS. 1 1.1 Definitions 1 1.2 Interpretive Provisions 26 1.3 Accounting Terms 27 1.4 References to Documents 28 1.5 Time 28 1.6

July 6, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 29, 2023 GEOSPACE TECHNOLOGI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 29, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commi

May 17, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 7007 Pinemont Drive Houston, Texas 77040-6601 (Ad

May 12, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended March 31, 2023 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE T

May 11, 2023 EX-99.1

GEOSPACE TECHNOLOGIES CORPORATION REPORTS PROFITABLE SECOND QUARTER AND SIX-MONTH 2023 EARNINGS

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES CORPORATION REPORTS PROFITABLE SECOND QUARTER AND SIX-MONTH 2023 EARNINGS HOUSTON, TX – May 11, 2023 - Geospace Technologies Corporation (NASDAQ: GEOS) (the “Company”) today announced results for its second quarter ended March 31, 2023. For the three-months ended March 31, 2023, Geospace reported revenue of $31.4 million compare

May 11, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2023 GEOSPACE TECHNOLOGIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commis

February 28, 2023 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

February 10, 2023 SC 13G/A

GEOS / Geospace Technologies Corporation / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* Geospace Technologies Corp (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended December 31, 2022 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPAC

February 9, 2023 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 9, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

February 8, 2023 EX-99.1

Geospace Technologies CORPORATION REPORTS strong FIRST Quarter 2023 Earnings

NEWS RELEASE Geospace Technologies CORPORATION REPORTS strong FIRST Quarter 2023 Earnings HOUSTON, TX – February 8, 2023 - Geospace Technologies Corporation (NASDAQ: GEOS) (the “Company”) today announced results for its first quarter ended December 2022.

February 8, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 8, 2023 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

January 10, 2023 SC 13G

GEOS / Geospace Technologies Corporation / GATE CITY CAPITAL MANAGEMENT, LLC Passive Investment

SC 13G 1 fp0081578-1sc13g.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. )* GEOSPACE TECHNOLOGIES CORPORATION (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) Dece

January 4, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ? Defin

November 18, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

November 18, 2022 EX-21.1

Subsidiaries of the Registrant.**

Exhibit 21.1 Subsidiaries of Geospace Technologies Corporation GTC, Inc., a Texas corporation Geospace Technologies Canada, Inc., an Alberta corporation Geospace Technologies Corporation Azerbaijan Branch, an Azerbaijan company Geospace Engineering Resources International, Inc., a Texas corporation Geospace Finance Corp., a Texas corporation GTC Inc. Beijing Representative Office, a Chinese compan

November 18, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2022 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPORATION (Exact Name of Registrant

November 18, 2022 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2022 RESULTS

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2022 RESULTS Houston, Texas ? November 17, 2022 ? Geospace Technologies (NASDAQ: GEOS) today announced a net loss of $22.9 million, or $(1.76) per diluted share, on revenue of $89.3 million for its fiscal year ended September 30, 2022. This compares with a net loss of $14.1 million, or ($1.

November 4, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 3, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

August 10, 2022 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2022 THIRD QUARTER RESULTS Adjacent Market Business Segment Marks Quarterly Revenue Record

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2022 THIRD QUARTER RESULTS Adjacent Market Business Segment Marks Quarterly Revenue Record Houston, Texas ? August 9, 2022 ? Geospace Technologies (NASDAQ: GEOS) today announced results for the third quarter and nine-month period ended June 30, 2022. For the three-months ended June 30, 2022, Geospace Technolo

August 10, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended June 30, 2022 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TE

August 10, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 9, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

August 9, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

August 9, 2022 EX-99.1

GEOSPACE TECHNOLOGIES SCHEDULES THIRD QUARTER 2022 EARNINGS CALL

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES SCHEDULES THIRD QUARTER 2022 EARNINGS CALL HOUSTON, TX ? August 5, 2022 - Geospace Technologies (NASDAQ: GEOS) today announced that it will release third-quarter 2022 financial results on Tuesday, August 9, 2022 after the market closes. In conjunction with the release, Geospace has scheduled a conference call for Wednesday, Augu

May 19, 2022 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 7007 Pinemont Drive Houston, Texas 77040-6601 (Ad

May 12, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commis

May 12, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended March 31, 2022 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE T

May 12, 2022 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2022 SECOND QUARTER RESULTS Company Builds Diversification Momentum and Enters Credit Facility

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2022 SECOND QUARTER RESULTS Company Builds Diversification Momentum and Enters Credit Facility Houston, Texas ? May 11, 2022 ? Geospace Technologies (NASDAQ: GEOS) today announced results for the second quarter and six-month period ended March 31, 2022. During the three-month period ended March 31, 2022, Geos

May 10, 2022 EX-10.1

Revolving Loan and Security Agreement dated May 6, 2022 among Geospace Technologies Corporation and GTC, Inc., as borrowers, Amerisource Funding, Inc. and Woodforest National Bank, as lenders, and Amerisource Funding, Inc., as administrative agent for lenders (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed May 10, 2022).

Exhibit 10.1 REVOLVING LOAN AND SECURITY AGREEMENT THIS REVOLVING LOAN AND SECURITY AGREEMENT (the ?Agreement?) is made and entered into as of May 6, 2022 (the ?Effective Date?) by and between Geospace Technologies Corporation a Texas corporation (together with its successors and assigns ?Geospace?), GTC, Inc. a Texas corporation ( together with its successors and assigns ?GTC?) ( each individuall

May 10, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commiss

April 28, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

April 28, 2022 EX-99.1

GEOSPACE TECHNOLOGIES SCHEDULES SECOND QUARTER 2022 EARNINGS CALL

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES SCHEDULES SECOND QUARTER 2022 EARNINGS CALL HOUSTON, TX ? April 27, 2022?Geospace Technologies (NASDAQ: GEOS) today announced that it will release second-quarter 2022 financial results on Wednesday, May 11, 2022 after the market closes. In conjunction with the release, Geospace has scheduled a conference call for Thursday, May 1

February 10, 2022 SC 13G/A

GEOS / Geospace Technologies Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 4)* Name of issuer: Geospace Technologies Corp. Title of Class of Securities: Common Stock CUSIP Number: 37364X109 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is

February 8, 2022 SC 13G/A

GEOS / Geospace Technologies Corporation / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* Geospace Technologies Corp (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 2, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended December 31, 2021 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPAC

February 2, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 1, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

February 2, 2022 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2022 FIRST QUARTER RESULTS

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2022 FIRST QUARTER RESULTS Houston, Texas ? February 1, 2022 ? Geospace Technologies (NASDAQ: GEOS) today announced a net loss of $6.8 million, or $(0.52) per diluted share, on revenue of $18.0 million for its first quarter ended December 31, 2021. This compares with a net loss of $1.1 million, or ($0.08) per

January 20, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 19, 2022 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

January 20, 2022 EX-99.1

# # #

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE HOUSTON, TX ? JANUARY 19, 2022 - Geospace Technologies (NASDAQ: GEOS) today announced that it will release 2022 first-quarter financial results on Tuesday, February 1, 2022 after the market closes. In conjunction with the release, Geospace has scheduled a conference call for Wednesday, February 2, 2022 at 10:00 a.m. Eastern Time (9:00 a.m. Central).

January 3, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant: ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ? Definitiv

November 19, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

November 19, 2021 EX-21.1

Subsidiaries of the Registrant.**

Exhibit 21.1 Subsidiaries of Geospace Technologies Corporation GTC, Inc., a Texas corporation Geospace Technologies Canada, Inc., an Alberta corporation Geospace Technologies Corporation Azerbaijan Branch, an Azerbaijan company Geospace Engineering Resources International, Inc., a Texas corporation Geospace Finance Corp., a Texas corporation GTC Inc. Beijing Representative Office, a Chinese compan

November 19, 2021 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2021 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPORATION (Exact Name of Registrant

November 19, 2021 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2021 RESULTS

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2021 RESULTS Houston, Texas ? November 18, 2021 ? Geospace Technologies (NASDAQ: GEOS) today announced a net loss of $14.1 million, or $(1.05) per diluted share, on revenue of $94.9 million for its fiscal year ended September 30, 2021. This compares with a net loss of $19.2 million, or ($1.

November 4, 2021 EX-99.1

# # #

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE HOUSTON, TX ? NOVEMBER 3, 2021?Geospace Technologies (NASDAQ: GEOS) today announced that it will release fourth-quarter and fiscal year 2021 financial results on Thursday, November 18, 2021 after the market closes. In conjunction with the release, Geospace has scheduled a conference call for Friday, November 19, 2021 at 10:00 a.m. Eastern Time (9:00

November 4, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 3, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

August 27, 2021 EX-99.2

Amendment to the Geospace Technologies Corporation 2014 Long-Term Incentive Plan, approved by the stockholders on February 4, 2021.

Exhibit 99.2 FIRST AMENDMENT TO THE GEOSPACE TECHNOLOGIES CORPORATION 2014 LONG TERM INCENTIVE PLAN THIS AMENDMENT is made by Geospace Technologies Corporation. (the ?Company?), WITNESSETH: WHEREAS, the Company sponsors and maintains the ?Geospace Technologies Corporation 2014 Long Term Incentive Plan? (the ?Plan?); WHEREAS, unless the context clearly requires the contrary, capitalized terms that

August 27, 2021 S-8

As filed with the Securities and Exchange Commission on August 27, 2021

As filed with the Securities and Exchange Commission on August 27, 2021 Registration No.

August 6, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended June 30, 2021 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TE

August 6, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

August 6, 2021 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2021 THIRD QUARTER RESULTS

Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2021 THIRD QUARTER RESULTS Houston, Texas ? August 5, 2021 ? Geospace Technologies (NASDAQ: GEOS) today announced a net loss of $0.8 million, or $(0.06) per diluted share, on revenue of $23.1

July 22, 2021 EX-99.1

Geospace Technologies Reports Third Quarter 2021 Results and Conference Call Schedule

Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports Third Quarter 2021 Results and Conference Call Schedule Houston, Texas ? July 21, 2021 ? Geospace Technologies (NASDAQ: GEOS) today announced that it will release third quarter 2021 financial results on Thu

July 22, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 21, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commi

May 24, 2021 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 7007 Pinemont Drive Houston, Texas 77040-6601 (Ad

May 7, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Commiss

May 7, 2021 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2021 SECOND QUARTER RESULTS

Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2021 SECOND QUARTER RESULTS Houston, Texas ? May 6, 2021 ? Geospace Technologies (NASDAQ: GEOS) today announced a net loss of $7.2 million, or $(0.53) per diluted share, on revenue of $23.9 mi

May 7, 2021 10-Q

Quarterly Report - GEOS10Q-03-31-21

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended March 31, 2021 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE T

April 28, 2021 EX-99.1

Geospace Technologies Reports Second Quarter 2021 Results and Conference Call Schedule

Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports Second Quarter 2021 Results and Conference Call Schedule Houston, Texas ? April 27, 2021 - Geospace Technologies (NASDAQ: GEOS) today announced that it will release second quarter 2021 financial results on

April 28, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

March 29, 2021 EX-10.1

Eight Amendment to Loan Agreement dated March 25, 2021 among Geospace Technologies Corporation, as borrower, certain subsidiaries of Geospace Technologies Corporation, as guarantors, and Frost Bank, as lender (incorporated by reference to Exhibit 10.1 to the Registrants Current Report on Form 8-K filed March 29, 2021, File No.: 001-13601).

Exhibit 10.1 EXECUTION VERSION EIGHTH AMENDMENT TO LOAN AGREEMENT This EIGHTH AMENDMENT TO LOAN AGREEMENT (this ?Amendment?) is entered into on the 25th day of March 2021 (the ?Effective Date?), by and between GEOSPACE TECHNOLOGIES CORPORATION, a Texas corporation, successor-by-merger to GEOSPACE TECHNOLOGIES CORPORATION, a Delaware corporation (the ?Borrower?), EACH OF THE DOMESTIC SUBSIDIARIES O

March 29, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 25, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

February 12, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* Geospace Technologies Corp (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: Geospace Technologies Corp. Title of Class of Securities: Common Stock CUSIP Number: 37364X109 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is

February 5, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 4, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

February 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 3, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

February 4, 2021 10-Q

Quarterly Report - 1ST QTR FORM 10-Q 12-31-20

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended December 31, 2020 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPAC

February 4, 2021 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2021 FIRST QUARTER RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2021 FIRST QUARTER RESULTS Houston, Texas – February 3, 2021 – Geospace Technologies (NASDAQ: GEOS) today announced its highest first quarter earnings in seven years, narrowing its net

January 22, 2021 EX-99.1

Geospace Technologies Reports First Quarter 2021 Results and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports First Quarter 2021 Results and Conference Call Schedule Houston, Texas – January 22, 2021 - Geospace Technologies (NASDAQ: GEOS) today announced that it will release first quarter 2021 financial res

January 22, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 22, 2021 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

December 30, 2020 DEF 14A

First Amendment to the Geospace Technologies Corporation 2014 Long-Term Incentive Plan (incorporated by reference to Appendix A to the Company’s Proxy Statement on Schedule 14A filed December 30, 2020).*

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ☒ D

November 23, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

November 23, 2020 EX-10.1

First Amendment to the Geospace Technologies Corporation 2014 Long Term Incentive Plan (incorporated by reference to Appendix A to the Company’s Proxy Statement on Schedule 14A filed December 30, 2020).

EX-10.1 Exhibit 10.1 SECOND AMENDMENT TO EMPLOYMENT AGREEMENT This Second Amendment to Employment Agreement (this “Amendment”), is made effective as of November 17, 2020 (the “Effective Date”) by and between GEOSPACE TECHNOLOGIES CORPORATION, a Delaware corporation (the “Company”), and Michael J. Sheen (“Employee”). RECITALS WHEREAS, the parties entered into that certain Employment Agreement (the

November 20, 2020 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2020 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPORATION (Exact Name of Registrant

November 20, 2020 EX-21.1

Subsidiaries of the Registrant.**

Exhibit 21.1 Subsidiaries of Geospace Technologies Corporation GTC, Inc., a Texas corporation Geospace Technologies Canada, Inc., an Alberta corporation Geospace Technologies Corporation Azerbaijan Branch, an Azerbaijan company Geospace Engineering Resources International, Inc., a Texas corporation Geospace Finance Corp., a Texas corporation GTC Inc. Beijing Representative Office, a Chinese compan

November 20, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 19, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

November 20, 2020 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2020 RESULTS ANNOUNCES STOCK REPURCHASE PROGRAM

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2020 RESULTS & ANNOUNCES STOCK REPURCHASE PROGRAM Houston, Texas – November 19, 2020 – Geospace Technologies (NASDAQ: GEOS) today announced a net loss of $19.2 milli

November 12, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 9, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

November 12, 2020 EX-99.1

Geospace Technologies Adds Board Directors from Global Defense Contractors

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Adds Board Directors from Global Defense Contractors Houston, Texas – November 10, 2020 – Geospace Technologies (NASDAQ: GEOS) (“Geospace” or the “Company”) today announced the addition of Kenneth Asbury, f

November 10, 2020 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 9, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

November 10, 2020 EX-99.1

Geospace Technologies Reports Fiscal Year 2020 Results and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports Fiscal Year 2020 Results and Conference Call Schedule Houston, Texas – November 9, 2020 - Geospace Technologies (NASDAQ: GEOS) today announced that it will release fiscal year 2020 financial results

August 26, 2020 SC 13D/A

GEOS / Geospace Technologies Corp / Nierenberg Investment Management Company, Inc. - AMENDMENT NO. 1 TO THE SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1) GEOSPACE TECHCNOLOGIES CORP. [GEOS] (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) David Nierenberg The D3 Family Funds 19605 NE 8th Street Camas, WA 98607 (360) 604-8600 With a copy to: Christopher P. Davis Kleinber

August 11, 2020 EX-99.1

GEOSPACE TECHNOLOGIES ANNOUNCES CHANGES TO THE BOARD OF DIRECTORS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES ANNOUNCES CHANGES TO THE BOARD OF DIRECTORS Houston, Texas – August 11, 2020 - GEOSPACE Technologies (NASDAQ: GEOS) (“Geospace” or the “Company”) today announced several immediate and upcoming changes to it

August 11, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Comm

August 7, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended June 30, 2020 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TE

August 7, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (

August 7, 2020 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2020 THIRD QUARTER AND NINE-MONTHS RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2020 THIRD QUARTER AND NINE-MONTHS RESULTS Houston, Texas – August 6, 2020 – Geospace Technologies (NASDAQ: GEOS) (the “Company”) today announced a net loss of $2.3 million, or $0.17 p

July 22, 2020 8-K

Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 22, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

July 22, 2020 EX-99.1

Geospace Technologies Reports Third Quarter 2020 Results and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports Third Quarter 2020 Results and Conference Call Schedule Houston, Texas – July 22, 2020—Geospace Technologies (NASDAQ: GEOS) today announced that it will release third quarter 2020 financial results

July 2, 2020 8-K

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

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 30, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

May 28, 2020 8-K

Regulation FD Disclosure

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 26, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Co

May 27, 2020 SC 13D

GEOS / Geospace Technologies Corp / Nierenberg Investment Management Company, Inc. - SCHEDULE 13D DATED MAY 26, 2020 Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. ) GEOSPACE TECHCNOLOGIES CORP. [GEOS] (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) David Nierenberg The D3 Family Funds 19605 NE 8th Street Camas, WA 98607 (360) 604-8600 With a copy to: Christopher P. Davis Kleinberg

May 27, 2020 EX-99.1

JOINT FILING AGREEMENT

EXHIBIT 99.1 JOINT FILING AGREEMENT WHEREAS, the undersigned (collectively, the “Reporting Persons”) from time to time make filings with the Securities and Exchange Commission pursuant to Regulation 13D-G under the Securities Exchange Act of 1934, as amended; and WHEREAS, the Reporting Persons prefer to make joint filings on behalf of all Reporting Persons rather than individual filings on behalf

May 18, 2020 EX-99

JOINT FILING AGREEMENT

EXHIBIT 1 JOINT FILING AGREEMENT WHEREAS, the undersigned (collectively, the “Reporting Persons”) from time to time make filings with the Securities and Exchange Commission pursuant to Regulation 13D-G under the Securities Exchange Act of 1934, as amended; and WHEREAS, the Reporting Persons prefer to make joint filings on behalf of all Reporting Persons rather than individual filings on behalf of each of the Reporting Persons; NOW, THEREFORE, the undersigned hereby agree as follows with each of the other Reporting Persons: 1.

May 18, 2020 SD

- SD

SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 7007 Pinemont Drive Houston, Texas 77040-6601

May 18, 2020 SC 13G

GEOS / Geospace Technologies Corp / Nierenberg Investment Management Company, Inc. - MAY 18, 2020 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Geospace Technologies Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) May 15, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

May 8, 2020 10-Q

Quarterly Report - GEOS-10Q-2019-03-31

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended March 31, 2020 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE T

May 8, 2020 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2020 SECOND QUARTER AND SIX-MONTHS RESULTS Company’s Subsidiary Quantum Technology Sciences Awarded U.S. Homeland Security Contract

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2020 SECOND QUARTER AND SIX-MONTHS RESULTS Company’s Subsidiary Quantum Technology Sciences Awarded U.S. Homeland Security Contract Houston, Texas – May 7, 2020 – Geospace Technologies

May 8, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Com

April 24, 2020 EX-99.1

Geospace Technologies Reports Second Quarter 2020 Results and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports Second Quarter 2020 Results and Conference Call Schedule Houston, Texas – April 23, 2020 – Geospace Technologies (NASDAQ: GEOS) today announced that it will release second quarter 2020 financial res

April 24, 2020 8-K

Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 23, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (

February 18, 2020 SC 13D

GEOS / Geospace Technologies Corp / SANSONE CAPITAL MANAGEMENT, LLC - SC 13D Activist Investment

InfuSystem Holdings, Inc (Form: SC 13D, Received: 06/29/2017 15:36:42) UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

February 12, 2020 SC 13G/A

GEOS / Geospace Technologies Corp / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Geospace Technologies Corp Title of Class of Securities: Common Stock CUSIP Number: 37364X109 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is f

February 12, 2020 SC 13G/A

GEOS / Geospace Technologies Corp / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* GEOSPACE TECHNOLOGIES CORP (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which t

February 7, 2020 8-K

Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 6, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation)

February 6, 2020 10-Q

GEOS / Geospace Technologies Corp 10-Q - Quarterly Report - GEOS-10Q-1Q2020

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended December 31, 2019 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPAC

February 6, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 5, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation)

February 6, 2020 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2020 FIRST QUARTER RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2020 FIRST QUARTER RESULTS Houston, Texas — February 5, 2020 — Geospace Technologies (NASDAQ: GEOS) today announced that it narrowed its net loss to $1.3 million, or $0.10 per diluted

January 27, 2020 EX-99.1

Geospace Technologies Reports First Quarter 2020 Results and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports First Quarter 2020 Results and Conference Call Schedule Houston, Texas – January 24, 2020 - Geospace Technologies (NASDAQ: GEOS) today announced that it will release first quarter 2020 financial res

January 27, 2020 8-K

Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 24, 2020 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation)

January 21, 2020 SC 13G/A

GEOS / Geospace Technologies Corp / Nierenberg Investment Management Company, Inc. - AMENDMENT NO. 1 TO THE SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Geospace Technologies Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) December 31, 2019 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fi

January 21, 2020 EX-99.1

JOINT FILING AGREEMENT (RESTATED)

EXHIBIT 1 JOINT FILING AGREEMENT (RESTATED) WHEREAS, the undersigned (collectively, the "Reporting Persons") from time to time make filings with the Securities and Exchange Commission pursuant to Regulation 13D-G under the Securities Exchange Act of 1934, as amended; and WHEREAS, the Reporting Persons prefer to make joint filings on behalf of all Reporting Persons rather than individual filings on behalf of each of the Reporting Persons; NOW, THEREFORE, the undersigned hereby agree as follows with each of the other Reporting Persons: 1.

January 6, 2020 DEF 14A

GEOS / Geospace Technologies Corp DEF 14A - - DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ☒ D

November 22, 2019 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2019 RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2019 RESULTS Houston, Texas – November 21, 2019 – Geospace Technologies (NASDAQ: GEOS) today announced that revenue for the year ended September 30, 2019 increased b

November 22, 2019 10-K

GEOS / Geospace Technologies Corp 10-K - Annual Report - GEOS-10K-2019

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2019 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPORATION (Exact Name of Registrant

November 22, 2019 EX-21.1

Subsidiaries of the Registrant.**

Exhibit 21.1 Subsidiaries of Geospace Technologies Corporation GTC, Inc., a Texas corporation Geospace Technologies Canada, Inc., an Alberta corporation Geospace Technologies Corporation Azerbaijan Branch, an Azerbaijan company Geospace Engineering Resources International, Inc., a Texas corporation Geospace Finance Corp., a Texas corporation GTC Inc. Beijing Representative Office, a Chinese compan

November 22, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 21, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation

November 22, 2019 EX-10.1

Consulting Agreement dated November 21, 2019 between Geospace Technologies Corporation and Thomas T. McEntire (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed November 22, 2019, File No.: 001-13601).

EX-10.1 Exhibit 10.1 CONSULTING AGREEMENT This Consulting Agreement (this “Agreement”) is executed as of November 21, 2019, between Geospace Technologies Corporation (the “Company”) and Thomas T. McEntire (“Consultant”). The Company and Consultant are sometimes referred to herein individually as a “party” and collectively as the “parties.” WHEREAS, Consultant plans to end his full-time employment

November 18, 2019 EX-10.1

Seventh Amendment to Loan Agreement dated November 15, 2019 among Geospace Technologies Corporation, as borrower, certain subsidiaries of Geospace Technologies Corporation, as guarantors, and Frost Bank, as lender (incorporated by reference to Exhibit 10.1 to the Registrants Current Report on Form 8-K filed November 18, 2019, File No.: 001-13601).

EX-10.1 Exhibit 10.1 SEVENTH AMENDMENT TO LOAN AGREEMENT This SEVENTH AMENDMENT TO LOAN AGREEMENT (this “Amendment”) is entered into on the 15th day of November 2019 (the “Effective Date”), by and between GEOSPACE TECHNOLOGIES CORPORATION, a Texas corporation, successor-by-merger to GEOSPACE TECHNOLOGIES CORPORATION, a Delaware corporation (the “Borrower”), EACH OF THE DOMESTIC SUBSIDIARIES OF THE

November 18, 2019 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 15, 2019 Geospace Technologies Corporation (Exact name of registrant as specified in its charter) Texas (State or other jurisdiction of incorporation) 001-13601 76-044778

November 8, 2019 8-K

Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation)

November 8, 2019 EX-99.1

Geospace Technologies Reports Fiscal Year 2019 Results and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports Fiscal Year 2019 Results and Conference Call Schedule Houston, Texas – November 7, 2019 – Geospace Technologies (NASDAQ: GEOS) today announced that it will release fiscal year 2019 financial results

August 12, 2019 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2019 Geospace Technologies Corporation (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation) (

August 12, 2019 EX-3.1

Amendment to the Corporation’s Bylaws, effective August 8, 2019.

EX-3.1 Exhibit 3.1 Bylaws Amendment AMENDMENT TO THE BYLAWS OF GEOSPACE TECHNOLOGIES CORPORATION Section 3.14(a)(ii) of Article III of the Bylaws is hereby amended by adding the following language indicated with double underlining as follows: “The Corporation may require any proposed nominee to furnish such other information (including by means of questionnaires or by other means) as it may reason

August 12, 2019 EX-3.2

Amended and Restated Bylaws of Geospace Technologies Corporation (incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K filed August 12, 2019).

EX-3.2 Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF GEOSPACE TECHNOLOGIES CORPORATION (a Texas Corporation) ARTICLE I OFFICES 1.1 The Corporation shall at all times maintain a registered office in the State of Texas. 1.2 The Corporation may also have offices at such other places within or outside of the State of Texas as the Board of Directors shall from time to time appoint or the business of the C

August 9, 2019 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2019 THIRD QUARTER AND NINE-MONTH RESULTS OBX Nodal Recording Equipment Rentals Drive Third Quarter and Nine-Month Results

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2019 THIRD QUARTER AND NINE-MONTH RESULTS OBX Nodal Recording Equipment Rentals Drive Third Quarter and Nine-Month Results Houston, Texas – August 8, 2019 – Geospace Technologies (NASD

August 9, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (

August 9, 2019 10-Q

GEOS / Geospace Technologies Corp 10-Q - Quarterly Report - GEO-10Q-2019-06-30

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended June 30, 2019 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TE

July 25, 2019 EX-99.1

Geospace Technologies Announces Third Quarter Fiscal Year 2019 Earnings and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Announces Third Quarter Fiscal Year 2019 Earnings and Conference Call Schedule Houston, Texas – July 24, 2019 – Geospace Technologies (NASDAQ: GEOS) today announced that it will release third quarter fiscal

July 25, 2019 8-K

Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (C

June 4, 2019 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 3, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisdicti

June 4, 2019 EX-10.1

Commercial Contract – Improved Property, dated June 3, 2019 by and between GTC, Inc. and Harmony Public Schools (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed June 3, 2019).

EX-10.1 Exhibit 10.1 TEXAS ASSOCIATION OF REALTORS® COMMERCIAL CONTRACT—IMPROVED PROPERTY USE OF THIS FORM BY PERSONS WHO ARE NOT MEMBERS OF THE TEXAS ASSOCIATION OF REALTORS® IS NOT AUTHORIZED. ©Texas Association of REALTORS®, Inc. 2016 1. PARTIES: Seller agrees to sell and convey to Buyer the Property described in Paragraph 2. Buyer agrees to buy the Property from Seller for the sales price stat

May 24, 2019 SD

GEOS / Geospace Technologies Corp SD - - FORM SD

FORM SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 7007 Pinemont Drive Houston, Texas 77040-

May 3, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of Registrant as Specified in Its Charter) Texas 001-13601 76-0447780 (State or Other Jurisdiction of Incorporation) (Com

May 3, 2019 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2019 SECOND QUARTER AND SIX-MONTH RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2019 SECOND QUARTER AND SIX-MONTH RESULTS Houston, Texas – May 2, 2019 – Geospace Technologies (NASDAQ: GEOS) today announced that it reported net income of $0.7 million, or $0.05 per

May 3, 2019 10-Q

GEOS / Geospace Technologies Corp 10-Q Quarterly Report 10-Q 03-31-19

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended March 31, 2019 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE T

May 3, 2019 EX-10.1

Form of Director Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.1 to the Registrant’s Form 10-Q filed May 3, 2019).*

Exhibit 10.1 DIRECTOR RESTRICTED STOCK unit AWARD AGREEMENT Geospace Technologies Corporation (the “Company”), pursuant to the Geospace Technologies Corporation 2014 Long Term Incentive Plan (the “Plan”), hereby awards to you, , effective as of (the “Grant Date”), Restricted Stock Units under the Plan on the following terms and conditions (individually, a “Restricted Stock Unit”, and collectively,

April 23, 2019 EX-99.1

Geospace Technologies Announces Second Quarter Fiscal Year 2019 Earnings and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Announces Second Quarter Fiscal Year 2019 Earnings and Conference Call Schedule Houston, Texas – April 23, 2019 – Geospace Technologies (NASDAQ: GEOS) today announced that it will release second quarter fis

April 23, 2019 8-K

Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 23, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisdic

April 1, 2019 EX-10.1

Sixth Amendment to Loan Agreement dated March 29, 2019 among Geospace Technologies Corporation, as borrower, certain subsidiaries of Geospace Technologies Corporation, as guarantors, and Frost Bank, as lender (incorporated by reference to Exhibit 10.1 to the Registrants Current Report on Form 8-K filed March 29, 2019).

EX-10.1 Exhibit 10.1 EXECUTION VERSION SIXTH AMENDMENT TO LOAN AGREEMENT This SIXTH AMENDMENT TO LOAN AGREEMENT (this “Amendment”) is entered into on the 29th day of March 2019 (the “Effective Date”), by and between GEOSPACE TECHNOLOGIES CORPORATION, a Texas corporation, successor-by-merger to GEOSPACE TECHNOLOGIES CORPORATION, a Delaware corporation (the “Borrower”), EACH OF THE DOMESTIC SUBSIDIA

April 1, 2019 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 29, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisdic

February 11, 2019 SC 13G/A

GEOS / Geospace Technologies Corp / VANGUARD GROUP INC Passive Investment

geospacetechnologiescorp.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1 )* Name of issuer: Geospace Technologies Corp Title of Class of Securities: Common Stock CUSIP Number: 37364X109 Date of Event Which Requires Filing of this Statement: December 31, 2018 Check the

February 8, 2019 EX-14.1

General Code of Business Conduct and Supplemental Code of Ethics for CEO and Senior Financial Officers (incorporated by reference to Exhibit 14.1 to the Registrant’s Current Report on Form 8-K filed February 6, 2019).

EX-14.1 Exhibit 14.1 TABLE OF CONTENTS Page Purpose 1 Relationship with the Company Human Resources 4 Substance Abuse 5 Health, Safety and Environment 7 Employee Loyalty 8 Confidentiality of Corporate Information 12 Internal Accounting Controls 12 Securities Trading and Disclosure 16 Records Retention/Destruction 23 Relationship with Others Anti-Corruption Compliance 23 Antitrust Compliance 25 Con

February 8, 2019 8-K

Amendment to Registrant's Code of Ethics, or Waiver of a Provision of the Code of Ethics, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 6, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisd

February 8, 2019 SC 13D/A

GEOS / Geospace Technologies Corp / Nierenberg Investment Management Company, Inc. - FEBRUARY 8, 2019 Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Geospace Technologies Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) December 31, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fi

February 8, 2019 SC 13G

GEOS / Geospace Technologies Corp / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* GEOSPACE TECHNOLOGIES CORP (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

February 8, 2019 EX-99.1

JOINT FILING AGREEMENT (RESTATED)

EXHIBIT 1 JOINT FILING AGREEMENT (RESTATED) WHEREAS, the undersigned (collectively, the "Reporting Persons") from time to time make filings with the Securities and Exchange Commission pursuant to Regulation 13D-G under the Securities Exchange Act of 1934, as amended; and WHEREAS, the Reporting Persons prefer to make joint filings on behalf of all Reporting Persons rather than individual filings on behalf of each of the Reporting Persons; NOW, THEREFORE, the undersigned hereby agree as follows with each of the other Reporting Persons: 1.

February 6, 2019 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2019 FIRST QUARTER RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2019 FIRST QUARTER RESULTS Houston, Texas – February 5, 2019 – Geospace Technologies (NASDAQ: GEOS) today announced that revenue for the first quarter ended December 31, 2018 increased

February 6, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 5, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisd

February 6, 2019 10-Q

GEOS / Geospace Technologies Corp GEOS-10Q-2018-12-31 (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q [X] Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended December 31, 2018 OR [ ] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TECHN

January 29, 2019 EX-99.1

Geospace Technologies Reports First Quarter 2019 Results and Conference Call Schedule

EX-99.1 Exhibit 99. 1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports First Quarter 2019 Results and Conference Call Schedule Houston, Texas – January 28, 2019G – Geospace Technologies (NASDAQ: GEOS) today announced that it will release first quarter 2019 financial r

January 29, 2019 8-K

Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 28, 2019 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisd

January 4, 2019 DEF 14A

GEOS / Geospace Technologies Corp DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ De

November 26, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 26, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other

November 26, 2018 EX-10.1

Form of Employee Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed November 26, 2018).*

EX-10.1 Exhibit 10.1 EMPLOYEE RESTRICTED STOCK UNIT AWARD AGREEMENT Geospace Technologies Corporation (the “Company”), pursuant to the Geospace Technologies Corporation 2014 Long Term Incentive Plan (the “Plan”), hereby awards to you, [ ], effective as of [ , 20 ] (the “Grant Date”), [ ] Restricted Stock Units under the Plan on the following terms and conditions (individually, a “Restricted Stock

November 16, 2018 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2018 RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FOURTH QUARTER AND FISCAL YEAR 2018 RESULTS Houston, Texas – November 15, 2018 – Geospace Technologies (NASDAQ: GEOS) today announced that it narrowed its net loss to $19.2 million, or $1.45 per d

November 16, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 15, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) (Commission File Number): 001-13601 Texas 76-0447780 (State or other jur

November 16, 2018 EX-21.1

Subsidiaries of the Registrant.**

Exhibit 21.1 Subsidiaries of Geospace Technologies Corporation GTC, Inc., a Texas corporation Geospace Technologies Canada, Inc., an Alberta corporation Geospace Technologies Corporation Azerbaijan Branch, an Azerbaijan company Geospace Engineering Resources International, Inc., a Texas corporation Geospace Finance Corp., a Texas corporation GTC Inc. Beijing Representative Office, a Chinese compan

November 16, 2018 10-K

GEOS / Geospace Technologies Corp 10-K 2018 (Annual Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended September 30, 2018 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-13601 GEOSPACE TECHNOLOGIES CORPORATION (Exact Name of Registrant

November 13, 2018 EX-10.1

Fifth Amendment to Loan Agreement dated November 9, 2018 among Geospace Technologies Corporation, as borrower, certain subsidiaries of Geospace Technologies Corporation, as guarantors, and Frost Bank, as lender (incorporated by reference to Exhibit 10.1 to the Registrants Current Report on Form 8-K filed November 13, 2018).

EX-10.1 Exhibit 10.1 FIFTH AMENDMENT TO LOAN AGREEMENT This FIFTH AMENDMENT TO LOAN AGREEMENT (this “Amendment”) is entered into on the 8th day of November 2018 (the “Effective Date”), by and between GEOSPACE TECHNOLOGIES CORPORATION, a Texas corporation, successor-by-merger to GEOSPACE TECHNOLOGIES CORPORATION, a Delaware corporation (the “Borrower”), EACH OF THE DOMESTIC SUBSIDIARIES OF THE BORR

November 13, 2018 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 8, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisd

November 6, 2018 8-K

Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 5, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisd

November 6, 2018 EX-99.1

Geospace Technologies Reports Fiscal Year 2018 Results and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President & CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports Fiscal Year 2018 Results and Conference Call Schedule Houston, Texas – November 5, 2018 – Geospace Technologies (NASDAQ: GEOS) today announced that it will release fiscal year 2018 financial results

August 3, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 2, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisdic

August 3, 2018 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2018 THIRD QUARTER AND NINE MONTH RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2018 THIRD QUARTER AND NINE MONTH RESULTS Houston, Texas — August 2, 2018 — Geospace Technologies (NASDAQ: GEOS) today announced that it narrowed its net loss to $4.8 million, or $0.36

August 3, 2018 10-Q

GEOS / Geospace Technologies Corp 10-Q 06-30-18 (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q [X] Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended June 30, 2018 OR [ ] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TECHNOLOG

July 30, 2018 8-K

Other Events

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 27, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other juri

July 20, 2018 EX-99.1

Geospace Technologies Announces Third Quarter Fiscal Year 2018 Earnings and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Announces Third Quarter Fiscal Year 2018 Earnings and Conference Call Schedule Houston, Texas – July 19, 2018– Geospace Technologies (NASDAQ: GEOS) today announced that it will release third quarter fisca

July 20, 2018 8-K

Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 19, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisdict

June 8, 2018 SC 13G/A

GEOS / Geospace Technologies Corp / BROWN CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 11)* Geospace Technologies Corporation (Name of Issuer) Common Stock, Par Value $0.01 (Title of Class of Securities) 37364X109 (CUSIP Number) Eddie C. Brown B

May 22, 2018 SD

GEOS / Geospace Technologies Corp SD

SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Texas 001-13601 76-0447780 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 7007 Pinemont Drive Houston, Texas 77040-6601

May 4, 2018 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2018 SECOND QUARTER AND SIX MONTH RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2018 SECOND QUARTER AND SIX MONTH RESULTS Houston, Texas — May 3, 2018 — Geospace Technologies (NASDAQ: GEOS) today announced that it narrowed its net loss to $4.7 million, or $0.36 pe

May 4, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisdictio

May 4, 2018 10-Q

GEOS / Geospace Technologies Corp 10-Q-20180331 (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q [X] Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended March 31, 2018 OR [ ] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TECHNOLO

April 24, 2018 EX-99.1

Geospace Technologies Announces Second Quarter Fiscal Year 2018 Earnings and Conference Call Schedule

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Announces Second Quarter Fiscal Year 2018 Earnings and Conference Call Schedule Houston, Texas—April 24, 2018—Geospace Technologies (NASDAQ: GEOS) today announced that it will release second quarter fisca

April 24, 2018 8-K

Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 24, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisdic

April 23, 2018 EX-99.1

JOINT FILING AGREEMENT (RESTATED)

EXHIBIT 1 JOINT FILING AGREEMENT (RESTATED) WHEREAS, the undersigned (collectively, the "Reporting Persons") from time to time make filings with the Securities and Exchange Commission pursuant to Regulation 13D-G under the Securities Exchange Act of 1934, as amended; and WHEREAS, the Reporting Persons prefer to make joint filings on behalf of all Reporting Persons rather than individual filings on behalf of each of the Reporting Persons; NOW, THEREFORE, the undersigned hereby agree as follows with each of the other Reporting Persons: 1.

April 23, 2018 SC 13G

GEOS / Geospace Technologies Corp / Nierenberg Investment Management Company, Inc. - APRIL 23, 2018 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Geospace Technologies Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 37364X109 (CUSIP Number) April 19, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed

March 1, 2018 EX-16.1

Letter from BDO USA, LLP to the Securities and Exchange Commission dated March 1, 2018

EX-16.1 Exhibit 16.1 Tel: 713-960-1706 2929 Allen Parkway, 20th Floor Fax: 713-960-9549 Houston, Texas 77019-7100 www.bdo.com March 1, 2018 Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549 We have been furnished with a copy of the response to Item 4.01 of Form 8-K for the event that occurred on February 27, 2018, to be filed by our former client, Geospace Technologies Co

March 1, 2018 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other juris

February 14, 2018 SC 13G/A

GEOS / Geospace Technologies Corp / BROWN CAPITAL MANAGEMENT LLC Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 10)* Geospace Technologies Corporation (Name of Issuer) Common Stock, Par Value $0.01 (Title of Class of Securities) 37364X109 (CUSIP Number) December 31, 20

February 12, 2018 8-K

Other Events

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 7, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other j

February 8, 2018 8-K

Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 7, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisd

February 8, 2018 SC 13G

GEOS / Geospace Technologies Corp / VANGUARD GROUP INC Passive Investment

geospacetechnologiescorp.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 0 )* Name of issuer: Geospace Technologies Corp Title of Class of Securities: Common Stock CUSIP Number: 37364X109 Date of Event Which Requires Filing of this Statement: December 31, 2017 Check the

February 7, 2018 EX-99.1

GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2018 FIRST QUARTER RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES REPORTS FISCAL YEAR 2018 FIRST QUARTER RESULTS Houston, Texas ? February 6, 2018 ? Geospace Technologies (NASDAQ: GEOS) today announced a net loss of $9.5 million, or $0.72 per diluted share, on revenue o

February 7, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 6, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisd

February 7, 2018 10-Q

GEOS / Geospace Technologies Corp 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q [X] Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the Quarterly Period Ended December 31, 2017 OR [ ] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 001-13601 GEOSPACE TECHN

January 30, 2018 EX-99.1

Geospace Technologies Reports First Quarter 2018 Results and Conference Call Schedule

EX-99.1 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE Geospace Technologies Reports First Quarter 2018 Results and Conference Call Schedule Houston, Texas – January 29, 2018 – Geospace Technologies (NASDAQ: GEOS) today announced that it will release first quarter 2018 financial results on Tuesday, Februar

January 30, 2018 8-K

Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 29, 2018 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other jurisd

January 3, 2018 DEF 14A

GEOS / Geospace Technologies Corp DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant: ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission only (as permitted by Rule 14a-6(e)(2)) ? D

December 15, 2017 EX-99.1

GEOSPACE TECHNOLOGIES ANNOUNCES COST REDUCTIONS

EX-99.1 Exhibit 99.1 NEWS RELEASE 7007 Pinemont Drive Houston, TX 77040 USA Contact: Rick Wheeler President and CEO TEL: 713.986.4444 FAX: 713.986.4445 FOR IMMEDIATE RELEASE GEOSPACE TECHNOLOGIES ANNOUNCES COST REDUCTIONS Houston, Texas ? December 14, 2017 ? Geospace Technologies Corporation (NASDAQ Global: GEOS) today announced a program to reduce its operating costs in light of expected and cont

December 15, 2017 8-K

Financial Statements and Exhibits, Other Events

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 14, 2017 GEOSPACE TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) Commission File Number: 001-13601 Texas 76-0447780 (State or other

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