X0306 4 2021-05-14 0 0001670349 U.S. WELL SERVICES, INC. USWS 0001754327 O'Neill Kyle 1360 POST OAK BOULEVARD, SUITE 1800 HOUSTON TX 77056 0 1 0 0 President & CEO Deferred Stock Units 2021-05-14 4 A 0 409989 0.00 A Class A Common Stock 409989 475148 D Deferred Stock Units 2021-08-14 4 A 0 28669 0.00 A Class A Common Stock 28669 503817 D Deferred Stock Units 2022-04-30 4 A 0 600000 0.00 A Class A Common Stock 600000 1038658 D Each Deferred Stock Unit represents a contingent right to receive one share of the Issuer's Class A common stock, par value $0.0001 per share (the "Common Stock"). The shares of Common Stock issuable with respect to vested Deferred Stock Units shall be issued in a lump sum on the earlier of the following dates and otherwise only as follows: (a) The 60th day after a termination of the Reporting Persons Continuous Service; (b) The consummation of a Change in Control (with such issuance deemed to occur as of immediately prior to such Change in Control to the extent permitted under Code Section 409A, but with the timing of such issuance otherwise determined by the Company); and (c) Upon the fifth (5th) anniversary of the Grant Date. Defined terms used but not defined herein shall have the meaning ascribed to such term in the Deferred Stock Unit Award Agreement. Reduced by 65,159 stock options forfeited for no consideration in May 2022. /s/ Erin C. Simonson, Attorney-in-Fact 2022-05-20