DWSN

SEC source: 0001104659-26-079857 · tm2619561-1_4seq1.xml · nonDerivative · entry 1

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,650

SEC source: 0001315863-26-000007 · form4.xml · nonDerivative · entry 1

Wilks Farris · CIK 0001641794 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes (4)(5).

Disclosed balance after: Not disclosed

F1 · kind: On December 31, 2025, WB Acquisitions Inc. ("WBA"), a wholly-owned subsidiary of Wilks Brothers, LLC ("Parent"), adopted the Plan of Complete Liquidation and Dissolution of WBA (the "Dissolution Plan"), which Dissolution Plan was approved by Parent, as the sole stockholder of WBA (the "Dissolution"). In connection with the Dissolution, WBA and Parent entered into the Distribution Agreement by and between WBA and Parent, pursuant to which WBA agreed to distribute all of the 15,547,010 shares of common stock, par value $0.01 per share, of the Issuer ("Common Stock") directly held by WBA to Parent in an in-kind distribution for no additional consideration and no change in pecuniary interest, effective as of December 31, 2025 (the "Distribution").

F2 · kind: (Continued from footnote 1) Immediately following the Distribution, WBA beneficially owned 0 shares of Common Stock and Parent directly owned 24,658,746 shares of Common Stock. Except for the change in Parent's beneficial ownership from indirect to direct with respect to 15,547,010 shares of Common Stock distributed by WBA to Parent, Parent's aggregate beneficial ownership of Common Stock remained unchanged immediately following the Distribution. This Form 4 represents an exit filing for WBA, following which WBA will cease to be a reporting person for purposes of Section 16 of the Securities Exchange Act of 1934, as amended.

F1 · price: On December 31, 2025, WB Acquisitions Inc. ("WBA"), a wholly-owned subsidiary of Wilks Brothers, LLC ("Parent"), adopted the Plan of Complete Liquidation and Dissolution of WBA (the "Dissolution Plan"), which Dissolution Plan was approved by Parent, as the sole stockholder of WBA (the "Dissolution"). In connection with the Dissolution, WBA and Parent entered into the Distribution Agreement by and between WBA and Parent, pursuant to which WBA agreed to distribute all of the 15,547,010 shares of common stock, par value $0.01 per share, of the Issuer ("Common Stock") directly held by WBA to Parent in an in-kind distribution for no additional consideration and no change in pecuniary interest, effective as of December 31, 2025 (the "Distribution").

F2 · price: (Continued from footnote 1) Immediately following the Distribution, WBA beneficially owned 0 shares of Common Stock and Parent directly owned 24,658,746 shares of Common Stock. Except for the change in Parent's beneficial ownership from indirect to direct with respect to 15,547,010 shares of Common Stock distributed by WBA to Parent, Parent's aggregate beneficial ownership of Common Stock remained unchanged immediately following the Distribution. This Form 4 represents an exit filing for WBA, following which WBA will cease to be a reporting person for purposes of Section 16 of the Securities Exchange Act of 1934, as amended.

F3 · valueOwnedAfter: Consists of 24,658,746 directly owned by Parent immediately following the Distribution. Staci Wilks owns an additional 349 shares of Common Stock, which are directly owned by Ms. Wilks.

F4 · ownership.direct: Parent is a manager-managed limited liability company, managed by Dan H. Wilks and Farris Wilks, each of whom may be deemed to have beneficial ownership of Common Stock directly held by Parent. WBA is a wholly-owned subsidiary of Parent. WBA will be dissolved promptly following the adoption of the Dissolution Plan. Dan H. Wilks and Farris Wilks are brothers; Dan H. Wilks and Staci Wilks are husband and wife and share the same household.

F5 · ownership.direct: 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.

SEC source: 0001104659-25-103150 · tm2529625-2_4seq1.xml · nonDerivative · entry 1

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,500

F1 · shares: Reflects restricted stock units granted to the reporting person under the Amended and Restated Dawson Geophysical Company 2016 Stock and Performance Incentive Plan. Each restricted stock unit represents the contingent right to receive one share of the Issuer's Class A common stock, par value $0.01 per share, and will vest in three equal annual installments beginning in October 2026.

SEC source: 0001104659-25-103148 · tm2529625-1_4seq1.xml · nonDerivative · entry 1

Clark William Anthony · CIK 0001481594 · CEO & President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 151,850

F1 · shares: Reflects restricted stock units granted to the reporting person under the Amended and Restated Dawson Geophysical Company 2016 Stock and Performance Incentive Plan. Each restricted stock unit represents the contingent right to receive one share of the Issuer's Class A common stock, par value $0.01 per share, and will vest in three equal annual installments beginning in October 2026.

SEC source: 0001104659-25-088660 · tm2525685-1_4seq1.xml · nonDerivative · entry 1

Clark William Anthony · CIK 0001481594 · CEO & President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,850

SEC source: 0001104659-25-081405 · tm2524106-1_4seq1.xml · nonDerivative · entry 1

Clark William Anthony · CIK 0001481594 · CEO & President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,300

SEC source: 0001104659-25-079881 · tm2523778-2_4seq1.xml · nonDerivative · entry 5

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,500

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-079881 · tm2523778-2_4seq1.xml · nonDerivative · entry 4

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,450

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-079881 · tm2523778-2_4seq1.xml · nonDerivative · entry 3

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,450

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-079879 · tm2523778-1_4seq1.xml · nonDerivative · entry 2

Shaw Ian M. · CIK 0001733488 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-079881 · tm2523778-2_4seq1.xml · nonDerivative · entry 2

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,450

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-079881 · tm2523778-2_4seq1.xml · nonDerivative · entry 1

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,950

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-079879 · tm2523778-1_4seq1.xml · nonDerivative · entry 1

Shaw Ian M. · CIK 0001733488 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,000

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-060238 · tm2518218-1_4seq1.xml · nonDerivative · entry 1

Clark William Anthony · CIK 0001481594 · CEO & President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 800

SEC source: 0001104659-25-057841 · tm2517547-1_4seq1.xml · nonDerivative · entry 1

Clark William Anthony · CIK 0001481594 · CEO & President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 750

SEC source: 0001104659-25-051197 · tm2515765-1_4seq1.xml · nonDerivative · entry 3

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,450

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-051122 · tm2515730-1_4seq1.xml · nonDerivative · entry 3

Shaw Ian M. · CIK 0001733488 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-051120 · tm2515730-2_4seq1.xml · nonDerivative · entry 3

Krylov Sergei · CIK 0001594869 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,415

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-051197 · tm2515765-1_4seq1.xml · nonDerivative · entry 2

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,500

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-051122 · tm2515730-1_4seq1.xml · nonDerivative · entry 2

Shaw Ian M. · CIK 0001733488 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,500

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-051120 · tm2515730-2_4seq1.xml · nonDerivative · entry 2

Krylov Sergei · CIK 0001594869 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,360

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-051197 · tm2515765-1_4seq1.xml · nonDerivative · entry 1

Mays Ray L · CIK 0001481288 · EVP & Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-051122 · tm2515730-1_4seq1.xml · nonDerivative · entry 1

Shaw Ian M. · CIK 0001733488 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,855

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-25-051120 · tm2515730-2_4seq1.xml · nonDerivative · entry 1

Krylov Sergei · CIK 0001594869 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,720

F1 · price: The reported price is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

SEC source: 0001104659-24-106286 · tm2425637-3_4seq1.xml · nonDerivative · entry 1

Conly Albert S. · CIK 0002040225 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,165

SEC source: 0001104659-24-106292 · tm2425637-6_4seq1.xml · nonDerivative · entry 1

Krylov Sergei · CIK 0001594869 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,165

SEC source: 0001104659-24-106291 · tm2425637-5_4seq1.xml · nonDerivative · entry 1

Bradley Bruce Franklin · CIK 0001905390 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,165

SEC source: 0001104659-24-106290 · tm2425637-4_4seq1.xml · nonDerivative · entry 1

Fernandes Jose Carlos · CIK 0002040232 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,165

SEC source: 0001104659-25-004870 · tm254013-1_4seq1.xml · nonDerivative · entry 1

Clark William Anthony · CIK 0001481594 · CEO & President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150

SEC source: 0000899243-23-020059 · doc4.xml · derivative · entry 2

Wilks Brothers, LLC · CIK 0001662888 · Director · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Krylov Sergei · CIK 0001594869 · Director

Wilks Matthew · CIK 0001696102 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 24,609,095

Underlying: Class A common stock, par value $0.01 per share · 5,811,765 shares

Expires 2024-06-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: On September 13, 2023, Dawson Geophysical Company ("Dawson") held a virtual special meeting of its stockholders. At the Special Meeting, Dawson's stockholders voted and approved the issuance of 5,811,765 shares of Common Stock of Issuer to Wilks Brothers, LLC ("Wilks Brothers") upon conversion of $9,880,000.50 in principal amount of the Convertible Note dated March 24, 2023 between Dawson and Wilks at a conversion price of $1.70 per share. Upon such approval, the Convertible Note automatically converted in full into the Conversion Shares upon such approval.

F1 · price: On September 13, 2023, Dawson Geophysical Company ("Dawson") held a virtual special meeting of its stockholders. At the Special Meeting, Dawson's stockholders voted and approved the issuance of 5,811,765 shares of Common Stock of Issuer to Wilks Brothers, LLC ("Wilks Brothers") upon conversion of $9,880,000.50 in principal amount of the Convertible Note dated March 24, 2023 between Dawson and Wilks at a conversion price of $1.70 per share. Upon such approval, the Convertible Note automatically converted in full into the Conversion Shares upon such approval.

F2 · balance_after: Consists of (i) 9,111,736 directly owned by Wilks, (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.

F2 · ownership.direct: Consists of (i) 9,111,736 directly owned by Wilks, (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.

F3 · ownership.direct: Wilks Brothers is a manager-managed limited liability company, managed by Dan H. Wilks and Farris Wilks. WB Acquisitions, Inc. ("WB Acquisitions") is an affiliate of Wilks Brothers. Dan H. Wilks and Farris Wilks are brothers; Dan H. Wilks and Staci Wilks are husband and wife and share the same household; Matthew D. Wilks is the Director of the Issuer and VP - Investments of Wilks Brothers; and Sergei Krylov, is the Director of the Issuer and Chief Financial Officer of Wilks Brothers. Matthew D. Wilks and Sergei Krylov were each inadvertently excluded in prior filings and have been added as Reporting Persons. Each of the foregoing are reporting persons on a Schedule 13D/A (as amended from time to time, the "13D") filed with the SEC on June 29, 2023 (such Reporting Persons on the 13D, collectively, the "13D Group") and may be deemed to beneficially own the shares of the Issuer's Common Stock owned by other members of the 13D Group. (Continued in footnote 4)

F3 · ownership.nature: Wilks Brothers is a manager-managed limited liability company, managed by Dan H. Wilks and Farris Wilks. WB Acquisitions, Inc. ("WB Acquisitions") is an affiliate of Wilks Brothers. Dan H. Wilks and Farris Wilks are brothers; Dan H. Wilks and Staci Wilks are husband and wife and share the same household; Matthew D. Wilks is the Director of the Issuer and VP - Investments of Wilks Brothers; and Sergei Krylov, is the Director of the Issuer and Chief Financial Officer of Wilks Brothers. Matthew D. Wilks and Sergei Krylov were each inadvertently excluded in prior filings and have been added as Reporting Persons. Each of the foregoing are reporting persons on a Schedule 13D/A (as amended from time to time, the "13D") filed with the SEC on June 29, 2023 (such Reporting Persons on the 13D, collectively, the "13D Group") and may be deemed to beneficially own the shares of the Issuer's Common Stock owned by other members of the 13D Group. (Continued in footnote 4)

F4 · ownership.nature: (Continued from footnote 3) 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.

SEC source: 0000899243-23-020059 · doc4.xml · nonDerivative · entry 1

Wilks Brothers, LLC · CIK 0001662888 · Director · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Krylov Sergei · CIK 0001594869 · Director

Wilks Matthew · CIK 0001696102 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 24,609,095

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: On September 13, 2023, Dawson Geophysical Company ("Dawson") held a virtual special meeting of its stockholders. At the Special Meeting, Dawson's stockholders voted and approved the issuance of 5,811,765 shares of Common Stock of Issuer to Wilks Brothers, LLC ("Wilks Brothers") upon conversion of $9,880,000.50 in principal amount of the Convertible Note dated March 24, 2023 between Dawson and Wilks at a conversion price of $1.70 per share. Upon such approval, the Convertible Note automatically converted in full into the Conversion Shares upon such approval.

F2 · balance_after: Consists of (i) 9,111,736 directly owned by Wilks, (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.

F2 · ownership.direct: Consists of (i) 9,111,736 directly owned by Wilks, (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.

F3 · ownership.direct: Wilks Brothers is a manager-managed limited liability company, managed by Dan H. Wilks and Farris Wilks. WB Acquisitions, Inc. ("WB Acquisitions") is an affiliate of Wilks Brothers. Dan H. Wilks and Farris Wilks are brothers; Dan H. Wilks and Staci Wilks are husband and wife and share the same household; Matthew D. Wilks is the Director of the Issuer and VP - Investments of Wilks Brothers; and Sergei Krylov, is the Director of the Issuer and Chief Financial Officer of Wilks Brothers. Matthew D. Wilks and Sergei Krylov were each inadvertently excluded in prior filings and have been added as Reporting Persons. Each of the foregoing are reporting persons on a Schedule 13D/A (as amended from time to time, the "13D") filed with the SEC on June 29, 2023 (such Reporting Persons on the 13D, collectively, the "13D Group") and may be deemed to beneficially own the shares of the Issuer's Common Stock owned by other members of the 13D Group. (Continued in footnote 4)

F3 · ownership.nature: Wilks Brothers is a manager-managed limited liability company, managed by Dan H. Wilks and Farris Wilks. WB Acquisitions, Inc. ("WB Acquisitions") is an affiliate of Wilks Brothers. Dan H. Wilks and Farris Wilks are brothers; Dan H. Wilks and Staci Wilks are husband and wife and share the same household; Matthew D. Wilks is the Director of the Issuer and VP - Investments of Wilks Brothers; and Sergei Krylov, is the Director of the Issuer and Chief Financial Officer of Wilks Brothers. Matthew D. Wilks and Sergei Krylov were each inadvertently excluded in prior filings and have been added as Reporting Persons. Each of the foregoing are reporting persons on a Schedule 13D/A (as amended from time to time, the "13D") filed with the SEC on June 29, 2023 (such Reporting Persons on the 13D, collectively, the "13D Group") and may be deemed to beneficially own the shares of the Issuer's Common Stock owned by other members of the 13D Group. (Continued in footnote 4)

F4 · ownership.nature: (Continued from footnote 3) 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.

SEC source: 0000899243-23-015840 · doc4.xml · nonDerivative · entry 1

Wilks Brothers, LLC · CIK 0001662888 · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,847,330

F1 · price: The reported price in Column 4 is a weighted average purchase price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

F2 · balance_after: Consists of (i) 3,299,971 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.

F2 · ownership.direct: Consists of (i) 3,299,971 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.

F3 · ownership.direct: 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.

F3 · ownership.nature: 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.

SEC source: 0000899243-23-016727 · doc4a.xml · nonDerivative · entry 1

Wilks Brothers, LLC · CIK 0001662888 · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Krylov Sergei · CIK 0001594869 · Director

Wilks Matthew · CIK 0001696102 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,847,330

F1 · price: The reported price in Column 4 is a weighted average purchase price. The Reporting Persons undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission ("SEC"), upon request, full information regarding the number of shares purchased at each separate price.

F2 · balance_after: Consists of (i) 3,299,971 directly owned by Wilks Brothers, LLC ("Wilks Brothers"), (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.

F2 · ownership.direct: Consists of (i) 3,299,971 directly owned by Wilks Brothers, LLC ("Wilks Brothers"), (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.

F3 · ownership.direct: 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; Dan H. Wilks and Staci Wilks are husband and wife and share the same household; Matthew D. Wilks is the Director of the Issuer and VP - Investments of Wilks Brothers; and Sergei Krylov, is the Director of the Issuer and Chief Financial Officer of Wilks Brothers. Matthew D. Wilks and Sergei Krylov were each inadvertently excluded in prior filings and have been added as Reporting Persons. Each of the foregoing are reporting persons on a Schedule 13D/A (as amended from time to time, the "13D") filed with the SEC on June 29, 2023 (such Reporting Persons on the 13D, collectively, the "13D Group") and may be deemed to beneficially own the shares of the Issuer's Common Stock owned by other members of the 13D Group.

F4 · ownership.direct: (Continued from Footnote 3) 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.

F3 · ownership.nature: 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; Dan H. Wilks and Staci Wilks are husband and wife and share the same household; Matthew D. Wilks is the Director of the Issuer and VP - Investments of Wilks Brothers; and Sergei Krylov, is the Director of the Issuer and Chief Financial Officer of Wilks Brothers. Matthew D. Wilks and Sergei Krylov were each inadvertently excluded in prior filings and have been added as Reporting Persons. Each of the foregoing are reporting persons on a Schedule 13D/A (as amended from time to time, the "13D") filed with the SEC on June 29, 2023 (such Reporting Persons on the 13D, collectively, the "13D Group") and may be deemed to beneficially own the shares of the Issuer's Common Stock owned by other members of the 13D Group.

F4 · ownership.nature: (Continued from Footnote 3) 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.

SEC source: 0000899243-23-015553 · doc4.xml · nonDerivative · entry 2

Wilks Brothers, LLC · CIK 0001662888 · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 17,650,200

F2 · balance_after: Consists of (i) 2,094,237 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.

F2 · ownership.direct: Consists of (i) 2,094,237 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.

F3 · ownership.direct: 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.

F3 · ownership.nature: 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.

SEC source: 0000899243-23-015553 · doc4.xml · nonDerivative · entry 1

Wilks Brothers, LLC · CIK 0001662888 · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 17,645,762

F1 · price: The reported price in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $2.06 to $2.39 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · balance_after: Consists of (i) 2,094,237 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.

F2 · ownership.direct: Consists of (i) 2,094,237 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.

F3 · ownership.direct: 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.

F3 · ownership.nature: 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.

SEC source: 0000899243-23-015834 · doc4a.xml · nonDerivative · entry 2

Wilks Brothers, LLC · CIK 0001662888 · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,838,435

F2 · balance_after: 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, (iii) 349 shares of the Issuer's Common Stock directly owned by Staci Wilks, and the shares reported on this Form 4.

F4 · balance_after: On June 12, 2023, the Reporting Persons filed a Form 4 which inadvertently excluded 1,188,235 shares of common stock received by Wilks Brothers, LLC 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"). See Reporting Persons' Form 4 filed in connection with such 1,188,235 shares received by Wilks Brothers, LLC.

F2 · ownership.direct: 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, (iii) 349 shares of the Issuer's Common Stock directly owned by Staci Wilks, and the shares reported on this Form 4.

F3 · ownership.direct: 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.

F3 · ownership.nature: 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.

SEC source: 0000899243-23-015834 · doc4a.xml · nonDerivative · entry 1

Wilks Brothers, LLC · CIK 0001662888 · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,833,997

F1 · price: The reported price in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $2.06 to $2.39 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · balance_after: 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, (iii) 349 shares of the Issuer's Common Stock directly owned by Staci Wilks, and the shares reported on this Form 4.

F4 · balance_after: On June 12, 2023, the Reporting Persons filed a Form 4 which inadvertently excluded 1,188,235 shares of common stock received by Wilks Brothers, LLC 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"). See Reporting Persons' Form 4 filed in connection with such 1,188,235 shares received by Wilks Brothers, LLC.

F2 · ownership.direct: 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, (iii) 349 shares of the Issuer's Common Stock directly owned by Staci Wilks, and the shares reported on this Form 4.

F3 · ownership.direct: 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.

F3 · ownership.nature: 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.

SEC source: 0000899243-23-015829 · doc4.xml · nonDerivative · entry 1

Wilks Brothers, LLC · CIK 0001662888 · 10% owner

WB Acquisitions Inc. · CIK 0001891025 · 10% owner

Wilks Dan H. · CIK 0001641792 · 10% owner

Wilks Staci · CIK 0001641796 · 10% owner

Wilks Farris · CIK 0001641794 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,829,831

F1 · price: 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.

F2 · balance_after: 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.

F2 · ownership.direct: 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.

F3 · ownership.direct: 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.

F3 · ownership.nature: 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.

SEC source: 0001104659-22-092435 · tm2224078-3_4seq1.xml · nonDerivative · entry 1

Brata James Kevin · CIK 0001437972 · EVP, Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · shares: Includes 25,000 restricted stock units, which may be settled solely in cash ("cash-settled RSUs"). Each cash-settled RSU is the economic equivalent of one share of Common Stock of the Issuer.

F2 · balance_after: Dawson Geophysical Company and the Reporting Person entered into a mutual agreement for the cash settlement of all vested cash-settled RSUs held by the Reporting Person as of the Transaction Date. Following the Transaction, the Reporting Person holds zero (0) shares of Dawson Geophysical Company Common Stock and zero (0) Dawson Geophysical Company restricted stock units.

SEC source: 0001104659-22-092434 · tm2224078-2_4seq.xml · nonDerivative · entry 1

TOBIAS C RAY · CIK 0001210507 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · shares: Includes 25,000 restricted stock units, which may be settled solely in cash ("cash-settled RSUs"). Each cash-settled RSU is the economic equivalent of one share of Common Stock of the Issuer.

F2 · balance_after: Dawson Geophysical Company and the Reporting Person entered into a mutual agreement for the cash settlement of all vested cash-settled RSUs held by the Reporting Person as of the Transaction Date. Following the Transaction, the Reporting Person holds zero (0) shares of Dawson Geophysical Company Common Stock and zero (0) Dawson Geophysical Company restricted stock units.

SEC source: 0001104659-22-092431 · tm2224078-1_4seq1.xml · nonDerivative · entry 1

JUMPER STEPHEN C · CIK 0001210224 · President/CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · shares: Includes 50,000 restricted stock units, which may be settled solely in cash ("cash-settled RSUs"). Each cash-settled RSU is the economic equivalent of one share of Common Stock of the Issuer.

F2 · balance_after: Dawson Geophysical Company and the Reporting Person entered into a mutual agreement for the cash settlement of all vested cash-settled RSUs held by the Reporting Person as of the Transaction Date. Following the Transaction, the Reporting Person holds zero (0) shares of Dawson Geophysical Company Common Stock and zero (0) Dawson Geophysical Company restricted stock units.

SEC source: 0001104659-22-005848 · tm223996-7_4seq1.xml · nonDerivative · entry 1

North Ted R · CIK 0001442058 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · price: Pursuant to the Agreement and Plan of Merger dated as of October 25, 2021, by and among Issuer, Wilks Brothers, LLC and its subsidiary, WB Acquisitions, Inc. ("Merger Sub"), Merger Sub launched a tender offer for all of the outstanding shares of common stock of Issuer at a price of $2.34 per share in cash. Mr. North tendered shares pursuant to the offer, and on January 18, 2022, Merger Sub consummated the offer and purchased all shares duly tendered.

SEC source: 0001104659-22-005846 · tm223996-6_4seq1.xml · nonDerivative · entry 2

Vander Ploeg Mark A · CIK 0001604461 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Through the Hermosa Trust dated November 3, 2015.

Disclosed balance after: 0

F1 · price: Pursuant to the Agreement and Plan of Merger dated as of October 25, 2021, by and among Issuer, Wilks Brothers, LLC and its subsidiary, WB Acquisitions, Inc. ("Merger Sub"), Merger Sub launched a tender offer for all of the outstanding shares of common stock of Issuer at a price of $2.34 per share in cash. Mr. Vander Ploeg tendered shares pursuant to the offer, and on January 18, 2022, Merger Sub consummated the offer and purchased all shares duly tendered.

F2 · balance_after: Held through the Hermosa Trust, of which the insider and his wife are trustees and beneficiaries.

SEC source: 0001104659-22-005846 · tm223996-6_4seq1.xml · nonDerivative · entry 1

Vander Ploeg Mark A · CIK 0001604461 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · price: Pursuant to the Agreement and Plan of Merger dated as of October 25, 2021, by and among Issuer, Wilks Brothers, LLC and its subsidiary, WB Acquisitions, Inc. ("Merger Sub"), Merger Sub launched a tender offer for all of the outstanding shares of common stock of Issuer at a price of $2.34 per share in cash. Mr. Vander Ploeg tendered shares pursuant to the offer, and on January 18, 2022, Merger Sub consummated the offer and purchased all shares duly tendered.

SEC source: 0001104659-22-005842 · tm223996-5_4seq1.xml · nonDerivative · entry 1

Klofas Michael L · CIK 0001676043 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · price: Pursuant to the Agreement and Plan of Merger dated as of October 25, 2021, by and among Issuer, Wilks Brothers, LLC and its subsidiary, WB Acquisitions, Inc. ("Merger Sub"), Merger Sub launched a tender offer for all of the outstanding shares of common stock of Issuer at a price of $2.34 per share in cash. Mr. Klofas tendered shares pursuant to the offer, and on January 18, 2022, Merger Sub consummated the offer and purchased all shares duly tendered.

SEC source: 0001104659-22-005841 · tm223996-4_4seq1.xml · nonDerivative · entry 1

JUMPER STEPHEN C · CIK 0001210224 · Director · President/CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,000

F1 · price: Pursuant to the Agreement and Plan of Merger dated as of October 25, 2021, by and among Issuer, Wilks Brothers, LLC and its subsidiary, WB Acquisitions, Inc. ("Merger Sub"), Merger Sub launched a tender offer for all of the outstanding shares of common stock of Issuer at a price of $2.34 per share in cash. Mr. Jumper tendered shares pursuant to the offer, and on January 18, 2022, Merger Sub consummated the offer and purchased all shares duly tendered.

SEC source: 0001104659-22-005837 · tm223996-1_4seq1.xml · nonDerivative · entry 1

Brata James Kevin · CIK 0001437972 · EVP, Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,000

F1 · price: Pursuant to the Agreement and Plan of Merger dated as of October 25, 2021, by and among Issuer, Wilks Brothers, LLC and its subsidiary, WB Acquisitions, Inc. ("Merger Sub"), Merger Sub launched a tender offer for all of the outstanding shares of common stock of Issuer at a price of $2.34 per share in cash. Mr. Brata tendered shares pursuant to the offer, and on January 18, 2022, Merger Sub consummated the offer and purchased all shares duly tendered.

SEC source: 0001104659-22-005840 · tm223996d3_4seq1.xml · nonDerivative · entry 1

TOBIAS C RAY · CIK 0001210507 · EVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,000

F1 · price: Pursuant to the Agreement and Plan of Merger dated as of October 25, 2021, by and among Issuer, Wilks Brothers, LLC and its subsidiary, WB Acquisitions, Inc. ("Merger Sub"), Merger Sub launched a tender offer for all of the outstanding shares of common stock of Issuer at a price of $2.34 per share in cash. Mr. Tobias tendered shares pursuant to the offer, and on January 18, 2022, Merger Sub consummated the offer and purchased all shares duly tendered.

SEC source: 0001104659-22-005838 · tm223996-2_4seq1.xml · nonDerivative · entry 1

COOPER CRAIG W · CIK 0001506912 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · price: Pursuant to the Agreement and Plan of Merger dated as of October 25, 2021, by and among Issuer, Wilks Brothers, LLC and its subsidiary, WB Acquisitions, Inc. ("Merger Sub"), Merger Sub launched a tender offer for all of the outstanding shares of common stock of Issuer at a price of $2.34 per share in cash. Mr. Cooper tendered shares pursuant to the offer, and on January 18, 2022, Merger Sub consummated the offer and purchased all shares duly tendered.

SEC source: 0001104659-21-121779 · tm2129025-4_4seq1.xml · nonDerivative · entry 1

Vander Ploeg Mark A · CIK 0001604461 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,099