CSW INDUSTRIALS INC

Securities Trading Plans of Directors and Executive Officers

During the fiscal quarter ended September 30, 2024, the following directors and officers of the Company adopted Rule 10b5-1 trading arrangements (as defined in Item 408 of Regulation S-K promulgated under the Exchange Act) that are intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act:

•Rob Swartz, anindependent member of our Board of Directors, adopted a Rule 10b5-1 trading arrangement on September 10, 2024. Under Mr. Swartz’s trading arrangement, he may sell an aggregate of up to 1,600 shares of the Company’s common stock. Any sales under the trading arrangement will be made during the period beginning January 2, 2025 and ending August 29, 2025.

•Luke Alverson, the Company’s Senior Vice President, General Counsel and Secretary, adopted a Rule 10b5-1 trading arrangement on September 11, 2024. Under Mr. Alverson’s trading arrangement, he may sell an aggregate of up to 7,208 shares of the Company’s common stock, the actual amount of which may be less based on tax withholdings and performance and vesting conditions of equity awards. Any sales under the trading arrangement will be made during the period beginning December 16, 2024 and ending May 30, 2025.

•Joseph Armes, the Company’s Chairman, Chief Executive Officer and President, adopted a Rule 10b5-1 trading arrangement on September 10, 2024. Under Mr. Armes’ trading arrangement, he may sell an aggregate of up to 12,000 shares of the Company’s common stock, which are intended to be sold on a monthly basis in equal installments, to the extent practicable. Any sales under the trading arrangement will be made during the period beginning February 15, 2025 (which occurs after the January 2025 termination of his existing Rule 10b5-1 trading arrangement) and ending January 15, 2026.

•Don Sullivan, the Company’s Executive Vice President and Chief Strategy Officer, adopted a Rule 10b5-1 trading arrangement on September 13, 2024. Under Mr. Sullivan’s trading arrangement, he may sell an aggregate of up to 17,973 shares of the Company’s common stock. Any sales under the trading arrangement will be made during the period beginning December 16, 2024 and ending November 14, 2025.