X0306 4 2022-03-23 0 0001738827 KLX Energy Services Holdings, Inc. KLXE 0001194888 ROBERTSON CORBIN J JR 3040 POST OAK BOULEVARD, 15TH FLOOR HOUSTON TX 77056 1 0 0 0 Common stock 2022-03-23 4 S 0 18891 7.0017 D 4430 I See footnote Common stock 2022-03-24 4 S 0 4430 7.2201 D 0 I See footnote Common stock 30179 D These shares are directly held by Robertson QES Investment LLC. The sole manager of Robertson QES Investment LLC is Corbin J. Robertson, Jr. The price reported in Column 4 is a weighted average price. These share were sold in multiple transactions on one day at prices ranging from $7.00 to $7.11. 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 ranges set forth in this footnote. The price reported in Column 4 is a weighted average price. These share were sold in multiple transactions on one day at prices ranging from $7.20 to $7.25. 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 ranges set forth in this footnote. /s/ Max L. Bouthillette, attorney-in-fact for Corbin J. Robertson, Jr. 2022-03-25