144 0001743069 XXXXXXXX LIVE 0001693256 Select Water Solutions, Inc. 001-38066 1820 NORTH I-35 GAINESVILLE TX 76240 (940) 668-1818 Szymanski Brian Officer CLASS A COMMON STOCK CHARLES SCHWAB & CO

3000 SCHWAB WAY WESTLAKE TX 76262

20000 335600.00 124353951 05/11/2026 NYSE CLASS A COMMON STOCK 02/14/2025 RESTRICTED STOCK VESTINGS ISSUER N 20000 02/14/2025 N/A Y SHARES TO BE SOLD WERE ACQUIRED BETWEEN 2/14/25 AND 2/24/25 05/11/2026 BRIAN PAUL SZYMANSKI