Additional Proxy Soliciting Materials (Form DEFA14A)

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Preliminary Proxy Statement

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

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Definitive Proxy Statement

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Definitive Additional Materials

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Soliciting Material under §240.14a-12

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

☑	No fee required.

☐	Fee paid previously with preliminary materials

☐	Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

Your Vote Counts! *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 www.ProxyVote.com Control # V87292-P44611 LCI INDUSTRIES 2026 Annual Meeting Vote by May 11, 2026 11:59 PM ET LCI INDUSTRIES 3501 COUNTY ROAD 6 EAST ELKHART, IN 46514 You invested in LCI INDUSTRIES 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 materials for the stockholder meeting to be held on May 12, 2026. 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 April 28, 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 Virtually at the Meeting* May 12, 2026 9:00 A.M. Eastern Time Virtually at: www.virtualshareholdermeeting.com/LCII2026

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. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". 1. To elect eight Directors to serve until the next Annual Meeting of Stockholders, each as recommended by the Board of Directors. For Nominees: 1a. Tracy D. Graham 1b. Brendan J. Deely For 1c. Virginia L. Henkels For 1d. Jason D. Lippert For 1e. Stephanie K. Mains For 1f. Linda K. Myers For 1g. Kieran M. O'Sullivan For 1h. John A. Sirpilla For 2. To approve, in a non-binding advisory vote, the compensation of the Company's named executive officers. For 3. To ratify the appointment of KPMG LLP as independent auditor for the Company for the year ending December 31, 2026. For 4. To approve the LCI Industries Amended 2018 Omnibus Incentive Plan. For NOTE: In their discretion, the persons named as proxies are authorized to vote on any other business that may properly come before the 2026 Annual Meeting of Stockholders or any adjournment or postponement thereof. Voting Items Board Recommends V87293-P44611