X0306 4 2017-10-31 0 0001693256 Select Energy Services, Inc. WTTR 0001703714 SES Legacy Holdings, LLC 1820 NORTH I-35, P.O. BOX 1715 GAINESVILLE TX 76421 0 0 1 0 Class B Common Stock 2017-10-31 4 J 0 2487029 0 D 35975512 D SES Holdings LLC Unit 2017-10-31 4 J 0 2487029 0 D Class A Common Stock 2487029 35975512 D Each share of Class B common stock has no economic rights but entitles its holder to one vote on all matters to be voted on by stockholders generally. Reflects the distribution of 2,487,029 SES Holdings LLC units and 2,487,029 shares of Class B common stock by SES Legacy Holdings, LLC to unitholders of SES Legacy Holdings, LLC. Subject to the terms of the limited liability company agreement of SES Holdings, LLC, by and among SES Legacy Holdings, LLC and the other members thereof, the SES Holdings LLC Units (together with a corresponding number of shares of Class B common stock) are exchangeable from time to time for shares of Class A common stock of the Issuer. The Issuer has the option to deliver cash in lieu of shares of Class A common stock upon the exercise by SES Legacy Holdings, LLC (or any transferee) of its exchange right. /s/ John D. Schmitz, Authorized Person of SES Legacy Holdings, LLC 2017-11-02