| The 2020 Annual Meeting of Stockholders of KLX Energy Services Holdings, Inc. will be held on July 24, 2020, beginning at 10:30 a.m. Eastern Time, virtually via the internet at www.meetingcenter.io/296843340. To access the virtual meeting, you must have the information that is printed in the shaded bar located on the reverse side of this form. The password for this meeting is — KLXE2020. Important notice regarding the Internet availability of proxy materials for the 2020 Annual Meeting of Stockholders. The Company’s 2020 Proxy Statement and the Company’s Annual Report for 2019 are available at: www.envisionreports.com/KLXE q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q + Notice of 2020 Annual Meeting of Stockholders - July 24, 2020 This proxy is solicited on behalf of the Board of Directors of KLX Energy Services Holdings, Inc. The above signed hereby constitutes and appoints Messrs. Thomas P. McCaffrey and Jonathan L. Mann, or either of them, with full power of substitution each, proxies to vote and act at the Annual Meeting of Stockholders of KLX Energy Services Holdings, Inc. (the “Company”) to be held July 24, 2020 virtually via the internet at www.meetingcenter.io/296843340 and at any postponement or adjournment thereof (the “Meeting”), upon and with respect to the number of shares of Company common stock, par value $0.01 per share, that the above signed would be entitled to vote if personally present. The above signed hereby instructs such proxies, or their substitutes, to vote on those matters appearing on the reverse side of this proxy card as specified by the above signed and in such manner as the proxies may determine on any other matter that may come before the Meeting, all as indicated in the accompanying Proxy Statement, receipt of which is hereby acknowledged. All proxies previously given by the above signed in respect of the Meeting are hereby revoked. Unless otherwise specified in the boxes provided on the reverse side of this proxy card, the Proxy will be voted (1) FOR Proposal 1, (2) FOR Proposal 2, (3) FOR Proposal 3, (4) FOR Proposal 4, (5) FOR Proposal 5, (6) FOR Proposal 6, (7) FOR Proposal 7, and (8) in the discretion of the named proxies as to any other matter that may properly come before the meeting. CONTINUED AND TO BE VOTED ON REVERSE SIDE Please sign exactly as name(s) appears hereon. Joint owners should each sign. When signing as attorney, executor, administrator, corporate officer, trustee, guardian, or custodian, please give full title. Date (mm/dd/yyyy) — Please print date below. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box. Change of Address — Please print new address below. Comments — Please print your comments below. + If voting by mail, you must complete sections A - C on both sides of this card. C Non-Voting Items B Authorized Signatures — This section must be completed for your vote to count. Please date and sign below. Proxy - KLX Energy Services Holdings, Inc. Small steps make an impact. Help the environment by consenting to receive electronic delivery, sign up at www.envisionreports.com/KLXE |