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, and Crestview Partners II SES Investment, LLC (via SES Legacy Holdings, LLC) Shareholder Class A Common Stock Merrill Lynch 555 California Street 18th Floor San Francisco CA 94104 3250000 63570000 124353951 05/19/2026 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 12/19/2016 Exchange (re-organization transaction) Issuer N 3802972 12/19/2016 Exchange N Crestview Partners II SES Investment B, LLC c/o Crestview Partners 590 Madison Ave 42 FL New York NY 10022 Class A Common Stock 04/08/2026 569760 8614771.2 Crestview Partners II SES Investment, LLC (via SES Legacy Holdings, LLC) c/o Crestview Partners 590 Madison Ave 42 FL New York NY 10022 Class A Common Stock 04/08/2026 2430240 36745228.8 Crestview Advisors, L.L.C. c/o Crestview Partners 590 Madison Ave 42 FL New York NY 10022 Class A Common Stock 04/08/2026 96223 1454891.76 Reflects 617,240 shares sold by Crestview Partners II SES Investment B, LLC and 2,632,760 shares sold by Crestview Partners II SES Investment, LLC (via SES Legacy Holdings, LLC). 05/19/2026 /s/ Poojitha Mantha, Chief Compliance Officer