X0306 4 2016-02-19 0 0001624794 CSW INDUSTRIALS, INC. CSWI 0001277031 GAMBRELL MICHAEL R 5400 LYNDON B. JOHNSON FWY, SUITE 1300 DALLAS TX 75240 1 0 0 0 Common Stock 2016-02-19 4 P 0 7000 29.31 A 7000 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $29.15 to $29.42, inclusive. The reporting person undertakes to provide to CSW Industrials, Inc., any security holder of CSW Industrials, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the ranges set forth in this footnote. /s/ Kelly Tacke, as attorney-in-fact 2016-02-22