X0306 4 2021-09-29 0 0001738827 KLX Energy Services Holdings, Inc. ?KLXE? 0001194888 ROBERTSON CORBIN J JR 1415 LOUISIANA STREET, SUITE 2400 HOUSTON TX 77002 1 0 0 0 Common stock 2021-09-29 4 S 0 8524 4.5293 D 147653 I See footnotes Common stock 2021-09-29 4 S 0 1268 4.5293 D 21959 I See footnotes Common stock 2021-09-29 4 S 0 508 4.5293 D 8812 I See footnotes Common stock 2021-09-30 4 S 0 12924 4.6983 D 134730 I See footnotes Common stock 2021-09-30 4 S 0 1922 4.6983 D 20036 I See footnotes Common stock 2021-09-30 4 S 0 771 4.6983 D 8041 I See footnotes Common stock 26793 D Common stock 279657 I See footnotes Common stock 9690 I See footnotes Quintana Energy Partners-QES Holdings, L.L.C. is controlled by Quintana Energy Partners, L.P. The general partner of Quintana Energy Partners, L.P., Quintana Energy Fund-FI, LP and Quintana Energy Fund-TE, LP is Quintana Capital Group, L.P. The sole general partner of Quintana Capital Group, L.P. is Quintana Capital Group GP Ltd. Corbin J. Robertson, Jr. may be deemed to be a beneficial owner of these shares due to his additional rights regarding the management of Quintana Capital Group GP Ltd. These shares are directly held by Quintana Energy Partners-QES Holdings, L.L.C. These shares are directly held by Quintana Energy Fund-TE, LP. These shares are directly held by Quintana Energy Fund-FI, LP. These shares are directly held by Robertson QES Investment LLC. The sole manager of Robertson QES Investment LLC is Corbin J. Robertson, Jr. These shares are directly held by QEP Management Co., L.P. The general partner of QEP Management Co., L.P. is QEP Management Co. GP, LLC. Corbin J. Robertson, Jr. may be deemed to be a beneficial owner of these shares due to his additional rights regarding the management of QEP Management Co. GP, LLC. 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 $4.5 to $4.65. 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 $4.5 to $4.65. 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 $4.5 to $4.65. 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 $4.53 to $4.805. 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 $4.53 to $4.805. 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 $4.53 to $4.805. 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. 2021-10-01