DEFA14A

DEFA14A 1 defa14a_2025.htm DEFA14A DEFA14A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE
SECURITIES EXCHANGE ACT OF 1934

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ 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‑11(c) or §240.14a‑2

LEXEO THERAPEUTICS, INC.

(Name of Registrant as Specified In Its Charter)

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

Payment of Filing Fee (Check the appropriate box):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table below per Exchange Act Rules 14a‑6(i)(4) and 0‑11.

Your Vote Counts!LEXEO THERAPEUTICS, INC.2026 Annual MeetingVote by June 24, 202611:59 PM ETLEXEO THERAPEUTICS, INC.345 PARK AVENUE SOUTH, FLOOR 6NEW YORK, NY 10010V96051-TBDYou invested in LEXEO THERAPEUTICS, 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 materials for the stockholder meeting to be held on June 25, 2026.Get informed before you voteView the Notice and Proxy Statement and Form 10-K online OR you can receive a free paper or email copy of the material(s) by submitting your request prior to June 11, 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 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 usersPoint your camera here and vote without entering a control numberVote Virtually at the Meeting* June 25, 202610:00 AM ETVirtually at:www.virtualshareholdermeeting.com/LXEO2026*Please check the meeting materials for any special requirements for meeting attendance.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.Board RecommendsVoting Items1. The election of Paula HJ Cholmondeley, Brenda Cooperstone and R. Nolan Townsend as Class III directors. Nominees:Paula HJ CholmondeleyForBrenda CooperstoneForR. Nolan TownsendFor2. The ratification of the appointment of KPMG LLP as our independent registered public accounting firm for our fiscal year ending December 31, 2026.ForNOTE: In their discretion, the proxyholders will vote on such other business as may properly come before the meeting or any adjournment or postponement thereof.

SEC Form DEFA14A filed by Lexeo Therapeutics Inc.