X0306 4 2022-11-01 1 0001670349 U.S. WELL SERVICES HOLDINGS, LLC USWS 0001641794 Wilks Farris 17018 INTERSTATE 20 CISCO TX 76437 0 0 1 0 Class A Common Stock, par value $0.0001 per share 2022-11-01 4 M 0 2455070 A 2455070 D Class A Common Stock, par value $0.0001 per share 2022-11-01 4 D 0 2455070 A 0 D 16.0% Convertible Senior Secured (Third Lien) PIK Note 2022-11-01 4 M 0 2455070 D Class A Common Stock 2455070 0 D Reflects the conversion of 16.0% Convertible Senior Secured (Third Lien) PIK Notes of the Issuer into a number of shares of Class A Common Stock of the Issuer equal to the quotient of (i) the aggregate principal amount, plus accrued and unpaid interest, owing under such note through July 9, 2022 ($17,971,111.95), and (ii) $7.32 pursuant to the Agreement and Plan of Merger by and among the Issuer, ProFrac Holding Corp. and Thunderclap Merger Sub I, Inc., dated as of June 21, 2022 (the "Merger Agreement"). Reflects the conversion pursuant to the Merger Agreement of shares of Class A Common Stock of the Issuer into 0.3366 shares of Class A Common Stock of ProFrac Holding Corp. ("PFHC Shares"). The closing price of PFHC Shares on November 1, 2022, was $22.08 per share. /s/ Robert J. Willette, Attorney-in-Fact 2022-11-09