wor-defa14a_20210816.htm

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2021 Annual Meeting of Shareholders Vote by September 28, 2021 11:59 p.m., EDT WORTHINGTON INDUSTRIES, INC. C/O BROADRIDGE P.O. BOX 1342 BRENTWOOD, NY 11717 D58531-P59701 You invested in WORTHINGTON INDUSTRIES, INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting of Shareholders. This is an important notice regarding the availability of proxy materials for the shareholder meeting to be held on September 29, 2021. Get informed before you vote View the Worthington Industries, Inc.’s Letter to Shareholders, Notice of Annual Meeting of Shareholders and Proxy Statement and Worthington Industries, Inc.’s 2021 Annual Report and the form of proxy online at www.proxyvote.com OR you can receive a free paper or e-mail copy of the proxy material(s) by requesting them prior to September 15, 2021. If you would like to request a copy of the proxy material(s) for this and/or future shareholder meetings, you may (1) visit www.proxyvote.com, (2) call 1-800-579-1639 or (3) send an e-mail to sendmaterial@proxyvote.com. If sending an e-mail, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or e-mail copy. For complete information and to vote, visit www.proxyvote.com Control # Vote Virtually at the Meeting* September 29, 2021 3:30 p.m., Eastern Daylight Time Smartphone users Point your camera here and vote without entering a control number Virtually at: www.virtualshareholdermeeting.com/WOR2021 *Please check the proxy materials for the Annual Meeting of Shareholders for any special requirements for meeting attendance. V1.1

Vote at www.proxyvote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming Annual Meeting of Shareholders. Please follow the instructions on the reverse side to vote on these important matters. Board Recommends Voting Items 1. Election of three directors, each to serve for a term of three years to expire at the 2024 Annual Meeting of Shareholders: Nominees: For 01) John B. Blystone 02) Mark C. Davis 03) Sidney A. Ribeau 2. Approval of advisory resolution to approve Worthington Industries, Inc.’s executive compensation. For 3. Ratification of selection of KPMG LLP as the independent registered public accounting firm of Worthington Industries, Inc. for the fiscal year ending May 31, 2022. For Against 4. Shareholder proposal related to Worthington Industries, Inc.’s climate policy. NOTE: In their discretion, the persons named as proxies will be authorized to vote on such other business as may properly come before the Annual Meeting of Shareholders. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. D58532-P59701 WORTHINGTON INDUSTRIES, INC.