144 0001663176 XXXXXXXX LIVE 0001624794 CSW INDUSTRIALS, INC. 001-37454 5420 LYNDON B. JOHNSON FREEWAY SUITE 500 DALLAS TX 75240 (214) 884-3777 Sullivan Don Officer Common stock Merrill Lynch

2100 Ross Ave Suite 1000 Dallas TX 75201

5222 1436050.00 16780000 03/17/2025 NYSE Common stock 04/01/2023 Employment related - restricted awards Don Sullivan N 4281 03/18/2025 Cash Common stock 10/01/2023 Employment related - restricted awards Don Sullivan N 2222 03/18/2025 Cash N Don Sullivan

5420 Lyndon B Johnson Fwy Suite 500 Dallas TX 75240

CSW Industrials 02/18/2025 1929 617772.00 Don Sullivan

5420 Lyndon B Johnson Fwy Suite 500 Dallas TX 75240

CSW Industrials 01/15/2025 1800 679545.00 Don Sullivan

5420 Lyndon B Johnson Fwy Suite 500 Dallas TX 75240

CSW Industrials 12/16/2024 1965 760630.00 This notice is for the next 90 days of Don Sullivan's 10b51 plan. 04/07/2025 09/13/2024 Don Sullivan