X0306 4 2017-11-01 0 0001693256 Select Energy Services, Inc. WTTR 0001721004 Nightingale David 1820 NORTH I-35, P.O. BOX 1715 GAINESVILLE TX 76241 0 1 0 0 Exec. VP - Wellsite Services Class A Common Stock 2017-11-01 4 A 0 33681 A 33681 D Class A Common Stock 2017-11-01 4 A 0 52259 0 A 85940 D Stock Options (right to buy) 23.80 2017-11-01 4 A 0 12602 0 A 2017-11-01 2022-05-01 Class A Common Stock 12602 12602 D Stock Options (right to buy) 27.71 2017-11-01 4 A 0 9020 0 A 2017-11-01 2023-07-15 Class A Common Stock 9020 21622 D Stock Options (right to buy) 8.97 2017-11-01 4 A 0 39028 0 A 2025-12-14 Class A Common Stock 39028 60650 D Stock Options (right to buy) 8.66 2017-11-01 4 A 0 85777 0 A 2026-12-10 Class A Common Stock 85777 146427 D Received in exchange for 44,017 shares of Class A common stock, $0.01 par value per share, of Rockwater Energy Solutions, Inc. ("Rockwater") in connection with the acquisition of Rockwater by Select Energy Services, Inc. These shares of restricted stock, granted as substitute awards under the Select Energy Services, Inc. 2016 Equity Incentive Plan (the "Plan"), will vest on April 10, 2018. These options, granted as substitute awards under the Plan, are all exercisable. These options, granted as substitute awards under the Plan, became exercisable as to 1/3 on November 1, 2017, and become exercisable to 1/3 on December 14, 2017 and 1/3 on December 14, 2018. These options, granted as substitute awards under the Plan, will become exercisable to 1/3 on each of December 10, 2017, December 10, 2018, and December 10, 2019. /s/ David J. Nightingale by Adam Law, as Attorney-in-Fact 2017-11-03