144 0001505639 XXXXXXXX LIVE 0001693256 Select Water Solutions, Inc. 001-38066 1820 North I-3 Gainesville TX 76240 940-668-1818 Crestview Partners II SES Investment B, LLC, Crestview Partners II SES Investment, LLC (via SES Legacy Holdings, LLC) and Crestview Advisors, L.L.C. Shareholder Class A Merrill Lynch 555 California Street 18th Floor San Francisco CA 94104 3096223 47031627.37 121843494 04/08/2026 NYSE Class A Common Stock 12/19/2016 Exchange of UP-C LLC Units and Class B Common Stock for Class A Common Stock Issuer N 38462541 12/19/2016 Exchange of Up-C LLC Units Class A Common Stock 05/06/2022 Equity Compensation Issuer N 18853 05/06/2022 Compensation Class A Common Stock 05/07/2021 Equity Compensation Issuer N 27036 05/07/2021 Compensation Class A Common Stock 05/08/2020 Equity Compensation Issuer N 23744 05/08/2020 Compensation Class A Common Stock 05/10/2019 Equity Compensation Issuer N 26590 05/10/2019 Compensation Class A Common Stock 12/19/2016 Exchange (re-organization transaction) Issuer N 3802972 12/19/2016 Exchange Y Reflects 569,760 shares sold by Crestview Partners II SES Investment B, LLC, 2,430,240 shares sold by Crestview Partners II SES Investment, LLC (via SES Legacy Holdings, LLC) and 96,223 shares sold by Crestview Advisors, L.L.C. 04/08/2026 /s/ Poojitha Mantha, Chief Compliance Officer