Additional Proxy Soliciting Materials (Form DEFA14A)

Your Vote Counts! Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.com Control # V92549-P51724 WARNER BROS. DISCOVERY, INC. 230 PARK AVENUE SOUTH NEW YORK, NY 10003 WARNER BROS. DISCOVERY, INC. 2026 Annual Meeting June 9, 2026 10:00 a.m., Eastern Time Virtual Meeting Site: www.virtualshareholdermeeting.com/WBD2026 You invested in WARNER BROS. DISCOVERY, INC. and it's time to vote! You have the right to vote on proposals being presented at the Annual Meeting. *Please check the meeting materials for any special requirements for meeting attendance. Get informed before you vote View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 26, 2026. 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 [email protected]. 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 Advance of the Meeting Vote by June 8, 2026 11:59 p.m., Eastern Time Visit www.ProxyVote.com Vote Virtually at the Meeting* Vote on June 9, 2026 10:00 a.m., Eastern Time Visit www.virtualshareholdermeeting.com/WBD2026

Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". Voting Items Board Recommends V92550-P51724 THIS IS NOT A VOTABLE BALLOT This is an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. Please follow the instructions on the reverse side to vote these important matters. 1. ELECTION OF DIRECTORS For Nominees: 01) Samuel A. Di Piazza, Jr. 02) Richard W. Fisher 03) Paul A. Gould 04) Debra L. Lee 05) Joseph M. Levin 06) Anton J. Levy 07) Kenneth W. Lowe 08) Fazal F. Merchant 09) Anthony J. Noto 10) Paula A. Price 11) Daniel E. Sanchez 12) Geoffrey Y. Yang 13) David M. Zaslav 2. Ratification of the appointment of PricewaterhouseCoopers LLP as Warner Bros. Discovery, Inc.'s independent registered public accounting firm for the fiscal year ending December 31, 2026. For 3. To vote on an advisory resolution to approve the 2025 compensation of Warner Bros. Discovery, Inc.'s named executive officers, commonly referred to as a "Say-on-Pay" vote. For 4. To vote on a stockholder proposal entitled "Sustainability ROI Report", if properly presented. Against 5. By the proxy holders, in their discretion, upon such other matters that may properly come before the meeting or any adjournment or adjournments thereof.