WRB-D WR Berkley Corp

SCHEDULE 14A INFORMATION

PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE

SECURITIES EXCHANGE ACT OF 1934

(AMENDMENT NO.     )

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Filed by a Party other than the Registrant  ☐

Check the appropriate box:

W. R. BERKLEY CORPORATION

(Name of Registrant as Specified In Its Charter)

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

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Your Vote Counts!W. R. BERKLEY CORPORATION2023 Annual MeetingVote by June 13, 2023 11:59 PM ET. For shares held in a Plan, vote by June 9, 2023 11:59 PM ET. W. R. BERKLEY CORPORATION ATTN: PHILIP S. WELT, SECRETARY 475 STEAMBOAT ROADGREENWICH, CT 06830V13632-P91611You invested in W. R. BERKLEY CORPORATION and its 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 June 14, 2023.Get informed before you voteView the Notice and Proxy Statement and Form 10K-Wrap online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 31, 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 Vote in Person at the Meeting*Point your camera here and June 14, 20231:30 PM EDTvote without entering a control numberW. R. Berkley Corporation 475 Steamboat Road Greenwich, Connecticut*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.comTHIS IS NOT A VOTABLE BALLOTThis 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.Voting Items Board Recommends1. Election of Directors Nominees:1a. W. Robert Berkley, Jr. For 1b. Maria Luisa Ferre For 1c. Daniel L. Mosley For 1d. Mark L. Shapiro For2. Non-binding advisory vote on a resolution approving the compensation of the Companys named executive officers pursuant to the compensation disclosure rules of the Securities and Exchange Commission, or say-on-pay vote For3. Non-binding advisory vote on the frequency of future votes on the compensation of the Companys named executive officers 1 Year4. Ratification of the appointment of KPMG LLP as the independent registered public accounting firm for the Company For for the fiscal year ending December 31, 2023 NOTE: Such other business as may properly come before the meeting or any adjournment thereof.Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click Delivery Settings.V13633-P91611