X0407 4 2023-03-24 0 0000799165 DAWSON GEOPHYSICAL CO DWSN 0001662888 Wilks Brothers, LLC 17018 INTERSTATE 20 CISCO TX 76437 0 0 1 0 0001891025 WB Acquisitions Inc. 17018 INTERSTATE 20 CISCO TX 76437 0 0 1 0 0001641792 Wilks Dan H. 17018 INTERSTATE 20 CISCO TX 76437 0 0 1 0 0001641796 Wilks Staci 17018 INTERSTATE 20 CISCO TX 76437 0 0 1 0 0001641794 Wilks Farris 17018 INTERSTATE 20 CISCO TX 76437 0 0 1 0 0 Class A common stock, par value $0.01 per share 2023-03-24 4 J 0 1188235 0.00 A 18829831 I See Footnote On March 24, 2023, Wilks Brothers, LLC received 1,188,235 shares of common stock from the Issuer as consideration for the sale of assets under that certain Asset Purchase Agreement, dated March 24, 2023 and as disclosed in the Issuer's current Report on Form 8-K filed with the SEC on March 24, 2023 (the "Asset Sale"), by and among the Issuer, Wilks Brothers, LLC and the other parties set forth in the Asset Purchase Agreement. The shares of common stock received pursuant to the Asset Sale were inadvertently excluded in prior filings. Consists of (i) 3,282,472 directly owned by Reporting Party, (ii) 15,547,010 shares of the Issuer's Common Stock directly owned by WB Acquisitions and (iii) 349 shares of the Issuer's Common Stock directly owned by Staci Wilks. Wilks Brothers, LLC ("Wilks Brothers") is a manager-managed limited liability company, managed by Dan H. Wilks and Farris Wilks. WB Acquisitions, Inc. ("WB Acquisitions") is a subsidiary of Wilks Brothers. Dan H. Wilks and Farris Wilks are brothers and may be deemed to indirectly beneficially own the shares of the Issuer's Common Stock directly owned by each of Wilks Brothers and WB Acquisitions. Dan H. Wilks and Staci Wilks are husband and wife and share the same household, and Dan H. Wilks may be deemed to indirectly beneficially own the shares of the Issuer's Common Stock directly owned by Staci Wilks. Each Reporting Person disclaims beneficial ownership of all equity securities reported herein except to the extent of its respective pecuniary interest therein, and the filing of this Form 4 shall not be construed as an admission that any such Reporting Person is the beneficial owner of any equity securities covered by this Form 4. /s/ Javier Rocha, Attorney-in-Fact 2023-06-16