X0306 4 2022-03-14 0 0001670349 U.S. WELL SERVICES, INC. USWS 0001833687 ANTOLIN JASPER 1360 POST OAK BOULEVARD, SUITE 1800 HOUSTON TX 77056 0 0 0 1 Principal Accounting Officer Class A Common Stock 2022-03-14 4 F 0 219 1.10 D 2290 D Represents shares withheld to satisfy withholding taxes applicable upon vesting of the March 14, 2019 restricted stock grant. /s/ Erin C. Simonson, Attorney-in-Fact 2022-03-16