Results of Operations and Financial Condition. ​ ​ On August 13, 2026, Dawson Geophysical Company (the “Company”) issued a press release reporting its preliminary and unaudited financial results for its second quarter ended June 30, 2026. A copy of the press release is furnished herewith as Exhibit 99.1. ​ Limitation on Incorporation by Reference. The information furnished in this Item 2.02, including the press release attached hereto as Exhibit 99.1, shall not be deemed “filed” for purposes…

Results of Operations and Financial Condition. ​ ​ On May 14, 2026, Dawson Geophysical Company (the “Company”) issued a press release reporting its preliminary and unaudited financial results for its first quarter ended March 31, 2026. A copy of the press release is furnished herewith as Exhibit 99.1. ​ Limitation on Incorporation by Reference. The information furnished in this Item 2.02, including the press release attached hereto as Exhibit 99.1, shall not be deemed “filed” for purposes of…

Results of Operations and Financial Condition. ​ ​ On March 30, 2026, Dawson Geophysical Company (the “Company”) issued a press release reporting its preliminary and unaudited financial results for its fourth quarter and year ended December 31, 2025. A copy of the press release is furnished herewith as Exhibit 99.1. ​ Limitation on Incorporation by Reference. The information furnished in this Item 2.02, including the press release attached hereto as Exhibit 99.1, shall not be deemed “filed” f…

Results of Operations and Financial Condition. ​ ​ On November 12, 2025, Dawson Geophysical Company (the “Company”) issued a press release reporting its preliminary and unaudited financial results for its third quarter ended September 30, 2025. A copy of the press release is furnished herewith as Exhibit 99.1. ​ Limitation on Incorporation by Reference. The information furnished in this Item 2.02, including the press release attached hereto as Exhibit 99.1, shall not be deemed “filed” for pur…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant ​ The information provided in

Entry Into Material Definitive Agreement ​ On October 31, 2025, Dawson Geophysical Company (the “ Company ”) and Dawson Operating LLC, a Texas limited liability company and a wholly owned subsidiary of the Company (“ Dawson Operating ” and together with the Company, the “ Borrowers ”), entered into a Revolving Credit Note (the “ Revolving Credit Note ”) in favor of Equify Financial, as lender (the “ Lender ”). ​ Pursuant to the Revolving Credit Note, the Borrowers, jointly and severally, may,…

Results of Operations and Financial Condition. ​ ​ On August 12, 2025, Dawson Geophysical Company (the “Company”) issued a press release reporting its preliminary and unaudited financial results for its second quarter ended June 30, 2025. A copy of the press release is furnished herewith as Exhibit 99.1. ​ Limitation on Incorporation by Reference. The information furnished in this Item 2.02, including the press release attached hereto as Exhibit 99.1, shall not be deemed “filed” for purposes…

Completion of Acquisition or Disposition of Assets. ​ ​ The information provided under

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a registrant. ​ The information provided under

Entry Into a Material Definitive Agreement. ​ ​ On August 8, 2025, Dawson Operating LLC, a Texas limited liability company (“Dawson Operating”) and wholly-owned subsidiary of Dawson Geophysical Company, a Texas corporation (the “Company”), entered into an Equipment Purchase Agreement, dated as of August 8, 2025 (the “Purchase Agreement”), with GTC, Inc., a Texas corporation (“GTC”) and wholly-owned subsidiary of Geospace Technologies Corporation, a Texas corporation (“Geospace”), pursuant to…

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). ​

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). ​

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). ​

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). ​

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). ​

Regulation FD Disclosure. ​ On March 28, 2024, the Board of Directors of the Company declared a special cash dividend of $0.32 per share, payable May 6, 2024 to stockholders of record at the close of business on April 22, 2024. Information about the declaration of the special cash dividend is included in the press release furnished as Exhibit 99.1 hereto.

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). ​

President and Chief Executive Officer — Anthony Clark: Anthony Clark was promoted to President and Chief Executive Officer.

Chief Financial Officer, Executive Vice President, Secretary, Treasurer (James K. Brata), President and Chief Executive Officer (Stephen C. Jumper), Chief Operating Officer and Executive Vice President (C. Ray Tobias) — James K. Brata, Stephen C. Jumper, C. Ray Tobias: Multiple senior executives including the CEO and CFO are departing without a named successor.

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

Executive Vice President and Chief Business Officer — Anthony Clark: Anthony Clark was appointed as Executive Vice President and Chief Business Officer of Dawson Geophysical Company.

the information set forth in such press release, a copy of which is furnished as Exhibit 99.1 to this Current Report. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

Entry into a Material Definitive Agreement . Asset Purchase Agreement and Convertible Note On March 24, 2023, Dawson Geophysical Company (the “Company”) entered into an Asset Purchase Agreement (the “Purchase Agreement”) with Wilks Brothers, LLC, for the limited purposes set forth therein (“Wilks”) and Breckenridge Geophysical, LLC (“Breckenridge”). Pursuant to the Purchase Agreement, and upon the terms and subject to the conditions described therein, the Company completed the purchase of sub…

of this Current Report and are incorporated herein by reference. As disclosed in