Your Vote Counts! WEST BANCORPORATION, INC. 1601 22ND STREET WEST DES MOINES, IA 50266 WEST BANCORPORATION, INC. You invested in WEST BANCORPORATION, 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 stockholder meeting to be held on April 27, 2023. Get informed before you vote View the Notice of Meeting, Proxy Statement, Proxy Card, Annual Report and Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 13, 2023. 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. Vote in Person at the Meeting* April 27, 2023 4:00 PM CDT David L. Miller Conference Center 1601 22nd Street West Des Moines, Iowa 50266 *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 V1.1 For complete information and to vote, visit www.ProxyVote.com Control # D94872-P83339 2023 Annual Meeting Vote by April 26, 2023 11:59 PM ET. For shares held in a Plan, vote by April 24, 2023 11:59 PM ET.

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 “Sign up for E-delivery”. Voting Items Board Recommends D94873-P83339 2. To approve, on a nonbinding basis, the 2022 compensation of the named executive officers disclosed in the proxy statement. 3. To ratify the appointment of RSM US LLP as the Company’s independent registered public accounting firm for 2023. NOTE: Such other business as may properly come before the meeting or any adjournment thereof. For For 1. Election of Directors Nominees: 1c. Steven K. Gaer 1a. Patrick J. Donovan 1d. Douglas R. Gulling 1k. Therese M. Vaughan 1b. Lisa J. Elming 1e. Sean P. McMurray 1l. Philip Jason Worth 1f. George D. Milligan 1g. David D. Nelson 1h. James W. Noyce 1i. Rosemary Parson 1j. Steven T. Schuler For For For For For For For For For For For For