bdc-defa14a_20230525.htm

	☐		Preliminary Proxy Statement

	☐		Confidential, for Use of the Commission Only (as permitted by Rule 14a‑6(e)(2))

	☐		Definitive Proxy Statement

	☑		Definitive Additional Materials

	☐		Soliciting Material Pursuant to §240.14a-12

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Your Vote Counts! BELDEN INC. 2023 Annual Meeting Vote by May 24, 2023 11:59 PM ET. For shares held in a Plan, vote by May 22, 2023 11:59 PM ET. BELDEN INC. 1 NORTH BRENTWOOD BOULEVARD 15TH FLOOR ST. LOUIS, MO 63105 V09734-P87854 You invested in BELDEN 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 May 25, 2023. 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 11, 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. For complete information and to vote, visit www.ProxyVote.com Control # Smartphone users Point your camera here and vote without entering a control number Vote in Person at the Meeting* May 25, 2023 8:00 AM CDT Four Seasons Hotel St. Louis The Mississippi Room 8th Floor 999 N. Second Street St. Louis, Missouri 63102 *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. V1.2

Vote at www.ProxyVote.com 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. Board Voting ItemsRecommends1.Election of DirectorsNominees:1a.David J. Aldrich For 1b.Lance C. Balk For 1c.Steven W. Berglund For 1d.Diane D. Brink For 1e.Judy L. Brown For 1f.Nancy Calderon For 1g.Ashish Chand For 1h.Jonathan C. Klein For 1i.YY Lee For 1j.Gregory J. McCray For 2.Ratification of the appointment of Ernst & Young as the Company’s Independent Registered Public Accounting Firm for 2023. For 3.Advisory vote on executive compensation for 2022. For 4.Advisory vote on frequency of future advisory votes related to executive officer compensation. 1Year Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”.