X0508 4/A 2024-02-26 2024-02-26 0001693256 Select Water Solutions, Inc. WTTR 0001539285 Schmitz John 1233 W. LOOP SOUTH, SUITE 1400 HOUSTON TX 77027 1 1 0 0 President/CEO 0 Class A Common Stock 1357262 D This amendment corrects the number of shares held directly by the reporting person in the Form 4 filed on February 26, 2024 (the "Prior Form 4") and is deemed to amend and update all subsequent Form 4s filed by the reporting person through the date hereof. The Prior Form 4 inadvertently included 217,264 shares that had been withheld for taxes on January 1, 2024. /s/ John Schmitz 2024-06-07