X0306 4 2018-03-13 0 0001693256 Select Energy Services, Inc. WTTR 0001600737 Burnett Richard Alan 515 POST OAK BLVD., STE. 200 HOUSTON TX 77027 1 0 0 0 Class A Common Stock 2018-03-13 4 P 0 2500 14.14 A 3750 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $13.99 to $14.25, inclusive. The reporting person undertakes to provide Select Energy Services, Inc., any security holder of Select Energy Services, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote. /s/ Richard A. Burnett by Adam Law, as attorney-in-fact 2018-03-14