Other Information.
−Removed: (c) During the quarter ended March 31, 2026 , no director or officer adopted or terminated any (i) ‘Rule 10b5 1 trading arrangement,’ as defined in Item 408 (a) of Regulation S K, intended to satisfy the affirmative defense conditions of Rule 10b5 1 (c), or (ii) ‘non Rule 10b5 1 trading arrangement,’ as defined in Item 408 (c) of Regulation S K.
+Added: (c) During the quarter ended June 30, 2026 , no director or officer adopted or terminated any (i) ‘Rule 10b5 1 trading arrangement,’ as defined in Item 408 (a) of Regulation S K, intended to satisfy the affirmative defense conditions of Rule 10b5 1 (c), or (ii) ‘non Rule 10b5 1 trading arrangement,’ as defined in Item 408 (c) of Regulation S K.
PART II - OTHER INFORMATION
2 unchanged sentences
Amended and Restated Bylaws of Geospace Technologies Corporation (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K filed August 8, 2019).
−Removed: First Amendment to Credit Agreement dated effective April 27, 2026 among the Company and each other person from time to time party thereto as borrower, and Woodforest National Bank, as lender.
Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) under the Securities and Exchange Act of 1934.
−Removed: Certification of the Chief Financial Officer pursuant Rule 13a-14(a) under the Securities and Exchange Act of 1934.
+Added: Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) under the Securities and Exchange Act of 1934.
Certification of the Chief Executive Officer pursuant 18 U.S.C.
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Section 1350.
−Removed: The following financial information from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, formatted in Inline Extensible Business Reporting Language (iXBRL):
−Removed: (i) the Consolidated Balance Sheets at March 31, 2026 and September 30, 2025, (ii) the Consolidated Statements of Operations for the three and six months ended March 31, 2026 and 2025, (iii) the Consolidated Statements of Comprehensive Loss for the three and six months ended March 31, 2026 and 2025, (iv) the Consolidated Statements of Stockholders’ Equity for the three and six months ended March 31, 2026 and 2025 (v) the Consolidated Statements of Cash Flows for the six months ended March 31, 2026 and 2025 and (vi) Notes to Consolidated Financial Statements.
−Removed: The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026 formatted in Inline XBRL and contained in Exhibit 101.
+Added: The following financial information from the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, formatted in Inline Extensible Business Reporting Language (iXBRL):
+Added: (i) the Consolidated Balance Sheets at June 30, 2026 and September 30, 2025, (ii) the Consolidated Statements of Operations for the three and nine months ended June 30, 2026 and 2025, (iii) the Consolidated Statements of Comprehensive Income (Loss) for the three and nine months ended June 30, 2026 and 2025, (iv) the Consolidated Statements of Stockholders’ Equity for the three and nine months ended June 30, 2026 and 2025 (v) the Consolidated Statements of Cash Flows for the nine months ended June 30, 2026 and 2025 and (vi) Notes to Consolidated Financial Statements.
+Added: The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 formatted in Inline XBRL and contained in Exhibit 101.
* Filed with this Quarterly Report on Form 10-Q
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GEOSPACE TECHNOLOGIES CORPORATION
+Added: August 7, 2026
/s/ Richard J.
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(duly authorized officer)
+Added: August 7, 2026
/s/ Robert L.
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Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.