X0609 4 2026-10-15 0 0001624794 CSW INDUSTRIALS, INC. CSW 0001413614 Armes Joseph B false 5420 LYNDON B JOHNSON FWY STE. 500 DALLAS TX 75240-1007 1 1 0 0 Chairman, President & CEO 1 Common Stock 2026-10-15 4 S 0 1500 287.0384 D 64083 D Common Stock 3219 I by ESOP Performance Rights Common Stock 9836 9836 D Performance Rights Common Stock 8004 8004 D Performance Rights Common Stock 8236 8236 D Performance Rights Common Stock 9186 9186 D Restricted Stock Units Common Stock 19685 19685 D The transaction reported was effected pursuant to a 10b5-1 trading plan established by the reporting person on August 12, 2025. The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $284.59 to $288.72, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. Each performance right represents a contingent right to receive one share of the issuer's common stock at vesting. The performance rights vest at a rate between 0% and 250% during a three-year performance cycle beginning on April 1, 2026 and ending on March 31, 2029 based on the issuer's relative total shareholder return in comparison to the total shareholder return performance among the Russell 2000 Index over the performance cycle. The performance rights may be settled, at the issuer's discretion, in cash or shares of common stock. Each performance right represents a contingent right to receive one share of the issuer's common stock at vesting. The performance rights vest at a rate between 0% and 200% during a three-year performance cycle beginning on April 1, 2025, and ending on March 31, 2028, based on the issuer's relative total shareholder return in comparison to the total shareholder return performance among the Russell 2000 Index over the performance cycle. The performance rights may be settled, at the issuer's discretion, in cash or shares of common stock. Each performance right represents a contingent right to receive one share of the issuer's common stock at vesting. The performance rights vest at a rate between 0% and 200% during a three-year performance cycle beginning on April 1, 2024, and ending on March 31, 2027, based on the issuer's relative total shareholder return in comparison to the total shareholder return performance among the Russell 2000 Index over the performance cycle. The performance rights may be settled, at the issuer's discretion, in cash or shares of common stock. Each performance right represents a contingent right to receive one share of the issuer's common stock at vesting. The performance rights vest at a rate between 0% and 200%, during a performance cycle beginning April 1, 2021 and ending on March 31, 2027 based on the issuer's relative total shareholder return in comparison to the total shareholder return performance among the Russell 2000 Index over the performance cycle. The performance rights may be settled, at the issuer's discretion, in cash or shares of common stock. Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock at vesting. 40% of the restricted stock units vest no earlier than April 26, 2025 upon the successful recruitment and hiring of a successor Chief Executive Officer; the remaining 60% vest upon the successful first employment anniversary of a successor Chief Executive Officer. /s/ Luke E. Alverson, Attorney-in-Fact for Joseph B. Armes 2026-10-16