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Cipher Mining Inc.

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Your Vote Counts! CIPHER MINING INC. *Please check the meeting materials for any special requirements for meeting attendance. Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit Control # CIPHER MINING INC. 1 VANDERBILT AVENUE FLOOR 54, SUITE C NEW YORK, NY 10017 You invested in CIPHER MINING INC. 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 material for the shareholder meeting to be held on May 02, 2024. Get informed before you vote View the Notice & Proxy Statement, Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 18, 2024. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit, (2) call 1-800-579-1639 or (3) send an email to 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. Vote Virtually at the Meeting* May 02, 2024 8:00 AM EDT Virtually at: 2024 Annual Meeting Vote by May 01, 2024 11:59 PM ET. 

THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Vote at Prefer to receive an email instead? While voting on, be sure to click “Sign up for E-delivery”. Voting Items Board Recommends 1. Election of Directors Nominees: For 01) Tyler Page 02) Cary Grossman 2. Ratification of the appointment of Marcum LLP as our independent registered public accounting firm for 2024. For 3. Approval of an amendment to our Second Amended and Restated Certificate of Incorporation to provide for exculpation of officers from breaches of fiduciary duty to the fullest extent permitted by the General Corporation Law of the State of Delaware. For NOTE: Such other business as may properly come before the meeting or any continuation, postponement or adjournment thereof.