CSW INDUSTRIALS, INC.

Disclosure Controls and Procedures

The Company's management, with the participation of the Company's Chief Executive Officer and Executive Vice President and Chief Financial Officer, has evaluated the effectiveness of the Company's disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, (the “Exchange Act”)) as of the end of the period covered by this Quarterly Report. Based on such evaluation, the Company's Chief Executive Officer and Executive Vice President and Chief Financial Officer have concluded that, as of the end of such period, the Company's disclosure controls and procedures were effective.

On May 1, 2025, we completed the Aspen Manufacturing acquisition. As such, the scope of our assessment of the effectiveness of our disclosure controls and procedures did not include the internal control over financial reporting of Aspen Manufacturing. These exclusions are consistent with the Securities and Exchange Commission Staff’s guidance that an assessment of a recently acquired business may be omitted from the scope of our assessment of the effectiveness of disclosure controls and procedures that are also part of internal control over financial reporting in the 12 months following the acquisition. Aspen Manufacturing accounted for 15.9% of our total assets and 14.0% of our total net revenue as of and for the nine months ended December 31, 2025

On November 4, 2025, we completed the MARS Parts acquisition. As such, the scope of our assessment of the effectiveness of our disclosure controls and procedures did not include the internal control over financial reporting of MARS Parts. These exclusions are consistent with the Securities and Exchange Commission Staff’s guidance that an assessment of a recently acquired business may be omitted from the scope of our assessment of the effectiveness of disclosure controls and procedures that are also part of internal control over financial reporting in the 12 months following the acquisition. MARS Parts accounted for 32.4% of our total assets and 7.3% of our total net revenue as of and for the three months ended December 31, 2025.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) during the quarter ended December 31, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.