Wilks Dan H.

Row 1 · 2018-01-12 · Purchase · Acquired 200,000 · Balance 37,799,413

F1: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Wilks Brothers, LLC on May 5, 2017.

F2: See Remarks.

F3: These shares are owned directly by Wilks Brothers, LLC.

Row 1 · 2018-06-11 · Purchase · Acquired 700 · Balance 0

F1: The Reporting Person bought-to-close 6,275 put options referencing 627,500 shares of Common Stock.

Row 2 · 2018-06-12 · Purchase · Acquired 1,060 · Balance 0

F1: The Reporting Person bought-to-close 6,275 put options referencing 627,500 shares of Common Stock.

Row 3 · 2018-06-13 · Purchase · Acquired 585 · Balance 0

F1: The Reporting Person bought-to-close 6,275 put options referencing 627,500 shares of Common Stock.

Row 4 · 2018-06-14 · Purchase · Acquired 3,930 · Balance 0

F1: The Reporting Person bought-to-close 6,275 put options referencing 627,500 shares of Common Stock.

Row 1 · 2023-09-13 · Conversion · Acquired 5,811,765 · Balance 24,609,095

F1: 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: 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: 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: (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.

Row 2 · 2023-09-13 · Conversion · Disposed 5,811,765 · Balance 24,609,095

F1: 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: 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: 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: (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.

Row 1 · Balance Not disclosed

F1: ProFrac Holdings II, LLC, a Texas limited liability company ("ProFrac Holdings II"), directly holds the securities of the Issuer. ProFrac Holdings II is a wholly-owned subsidiary of ProFrac Holdings, LLC, a Texas limited liability company ("ProFrac Holdings"). Each of Farris Wilks and THRC Holdings, LP, a Texas limited partnership ("THRC Holdings"), owns 50% of the membership interests in ProFrac Holdings. In addition, Farris Wilks and Dan Wilks are the sole managers of ProFrac Holdings. THRC Management, LLC, a Texas limited liability company ("THRC Management"), as General Partner of THRC Holdings, has exclusive voting and investment control over the securities of the Issuer held by THRC Holdings, and therefore may be deemed to beneficially own such securities. Dan Wilks, as sole manager of THRC Management, together with his spouse, Staci Wilks, who share the same household, may be deemed to exercise voting and investment power over the securities of the Issuer beneficially owned

F2: Continued from footnote 1) 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 3 shall not be construed as an admission that any such Reporting Person is the beneficial owner of any equity securities covered by this Form 3.

F3: On March 4, 2022, ProFrac Holdings transferred all of its right, title and interest in $20,000,000 in aggregate principal amount of 10% Convertible PIK Notes of the Issuer (the "Notes") to ProFrac Holdings II, which became the direct holder of the Notes as a result of such transfer.

F5: Subject to the terms and conditions of the Notes, all or any portion of the outstanding principal and accrued and unpaid interest owing under the Notes may be converted at the election of ProFrac Holdings II at any time into a number of shares of Common Stock equal to the quotient obtained by dividing (a) the amount of such outstanding aggregate principal amount plus accrued and unpaid interest through the date immediately prior to the date of conversion, by (b) the Conversion Price.

F4: Subject to earlier conversion in accordance with their terms, the entire outstanding and unpaid principal balance of the Notes, plus any accrued and unpaid interest thereon, will become due and payable to ProFrac Holdings II on February 2, 2023 (the "Maturity Date") in a number of shares of the Issuer's Common Stock, par value $0.0001 per share ("Common Stock"), equal to the quotient obtained by dividing (a) the amount of such outstanding principal and accrued and unpaid interest through the date immediately prior to the Maturity Date, by (b) the lesser of (i) $1.088125 (the "Conversion Price") and (ii) $0.8705, in each case, subject to certain anti-dilution adjustments in accordance with its terms.

F6: This number represents the number of shares of Common Stock issuable to ProFrac Holdings II upon conversion of the Notes if ProFrac Holdings II elects to convert the Notes based on the aggregate principal amount of the Notes (as described in footnote 4 above), not including the conversion of any accrued but unpaid interest on any Notes, and the Conversion Price applicable to the Notes (as described in footnote 5 above).

Row 1 · Balance 1,973,720

F1: THRC Holdings LP ("Holdings"), a Texas limited partnership, directly holds the securities of the Issuer, which shares were received as a distribution pursuant to the Plan of Reorganization of FTSI upon its emergence from Chapter 11 proceedings.

F2: THRC Management, LLC ("Management") a Texas limited liability company, as General Partner of Holdings, has exclusive voting and investment power over the shares of Issuer's Class A Common Stock held by Holdings, and therefore may be deemed to beneficially own such shares. Dan H. Wilks, as sole Manager of Management, together with his spouse, Staci Wilks, who share the same household, may be deemed to exercise voting and investment power over the shares of Issuer's Class A Common Stock directly owned by Holdings and therefore may be deemed to share in the beneficial ownership of such shares. 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 3/A shall not be construed as an admission that any such Reporting Person is the beneficial owner of any equity securities covered by this Form.

F3: The Reporting Persons' Form 3 and Exhibit 99.1 thereto previously filed with the Securities and Exchange Commission on November 24, 2020, is hereby amended to add THRC Management, LLC as a Reporting Person and indirect beneficial owner of the reported securities covered by this Form.

Row 1 · 2026-08-21 · Purchase · Acquired 212,650 · Balance 87,712,845

F1: Reflects shares of the Issuer's Class A common stock acquired in the open market directly by THRC Holdings LP. The general partner of THRC Holdings is THRC Management LLC, a Texas limited liability company. Dan Wilks is the sole member of THRC Management LLC and may be deemed to exercise voting and investment power over the shares of the Issuer's Class A common stock directly owned by THRC Holdings LP, and therefore may be deemed to beneficially own such shares.

F2: The reported price in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $4.65 to $4.75 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.

F3: 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.

Row 2 · 2026-08-24 · Purchase · Acquired 363,757 · Balance 88,076,602

F1: Reflects shares of the Issuer's Class A common stock acquired in the open market directly by THRC Holdings LP. The general partner of THRC Holdings is THRC Management LLC, a Texas limited liability company. Dan Wilks is the sole member of THRC Management LLC and may be deemed to exercise voting and investment power over the shares of the Issuer's Class A common stock directly owned by THRC Holdings LP, and therefore may be deemed to beneficially own such shares.

F4: The reported price in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $4.63 to $4.75 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.

F3: 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.

Row 3 · 2026-08-25 · Purchase · Acquired 30,820 · Balance 88,107,422

F1: Reflects shares of the Issuer's Class A common stock acquired in the open market directly by THRC Holdings LP. The general partner of THRC Holdings is THRC Management LLC, a Texas limited liability company. Dan Wilks is the sole member of THRC Management LLC and may be deemed to exercise voting and investment power over the shares of the Issuer's Class A common stock directly owned by THRC Holdings LP, and therefore may be deemed to beneficially own such shares.

F5: The reported price in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $4.74 to $4.82 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.

F3: 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.

Row 1 · 2023-12-08 · Sale · Disposed 40,000 · Balance 3,178,875

F1: The reported price in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $8.11 to $8.14 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: THRC Holdings, LP, a Texas limited partnership ("THRC Holdings"), directly holds the securities of the Issuer. THRC Management, LLC, a Texas limited liability company ("THRC Management"), as General Partner of THRC Holdings, has exclusive voting and investment control over the shares of the Issuer's Class A common stock held by THRC Holdings, and therefore may be deemed to beneficially own such shares.

F3: (continued from footnote 2) Dan Wilks, as sole manager of THRC Management, together with his spouse, Staci Wilks, may be deemed to exercise voting and investment power over the shares of the Issuer's Class A common stock directly owned by THRC Holdings, and therefore may be deemed to beneficially own such shares. 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.