X0306 4 2022-05-17 0 0001881487 ProFrac Holding Corp. PFHC 0001754159 THRC Holdings, LP 17018 INTERSTATE 20 CISCO TX 76437 1 0 1 1 Director by Deputization 0001834450 THRC Management, LLC 17018 INTERSTATE 20 CISCO TX 76437 1 0 1 1 Director by Deputization 0001641792 Wilks Dan H. 17018 INTERSTATE 20 CISCO TX 76437 1 0 1 1 Director by Deputization Class A common stock, par value $0.01 per share 2022-05-17 4 A 0 4222222 18.00 A 14954937 D Reflects shares of Class A common stock, par value $0.01 per share, acquired in connection with the Issuer's initial public offering, which closed on May 17, 2022. THRC Holdings, LP ("THRC Holdings"), a Texas limited partnership, directly holds the securities of the Issuer. THRC Management, LLC ("THRC Management"), a Texas limited liability company, as General Partner of THRC Holdings, has exclusive voting and investment control over the shares of Class A common stock held by THRC Holdings, and therefore may be deemed to beneficially own such shares. Dan Wilks, as sole manager of THRC Management, 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 their 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/ Robert J. Willette, Attorney-in-Fact 2022-05-19 /s/ Robert J. Willette, Attorney-in-Fact 2022-05-19 /s/ Robert J. Willette, Attorney-in-Fact 2022-05-19