BATL Battalion Oil Corporation

Your Vote Counts! BATTALION OIL CORPORATION C/O BROADRIDGE P.O. BOX 1342 BRENTWOOD, NY 11717 BATTALION OIL CORPORATION 2024 Annual Meeting Vote by November 20, 2024 11:59 PM ET Vote in Person at the Meeting* November 21, 2024 2:00 PM Central Time *Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.com Control # V57241-P18620 You invested in BATTALION OIL CORPORATION and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on November 21, 2024. Get informed before you vote View the Notice and Proxy Statement, Form 10-K and 10-K/A online OR you can receive a free paper or email copy of the material(s) by requesting prior to November 7, 2024. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Two Memorial City Plaza 820 Gessner Road Magnolia Conference Room (Suite 280) Houston, Texas 77024

THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters. Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”. V57242-P18620 Voting Items Board Recommends 1. To elect six directors to serve until the next Annual Meeting of Stockholders in accordance with our certificate of incorporation and bylaws. For Nominees: 01) Jonathan D. Barrett 02) David Chang 03) Gregory S. Hinds 04) Ajay Jegadeesan 05) Matthew B. Steele 06) William D. Rogers 2. To approve, in a non-binding advisory vote, executive compensation of our named executive officers. For 3. To determine, in a non-binding advisory vote, whether a stockholder vote to approve the compensation of our named executive officers should occur every one, two or three years. 3 Years NOTE: To transact such other business as may properly come before the Annual Meeting or any adjournment thereof.