Annexon, Inc. — Proxy Solicitation & Information Statement 2021

Apr 22, 2021

DEFA14A 1 d145953ddefa14a.htm DEFA14A DEFA14A

SCHEDULE 14A INFORMATION

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Securities Exchange Act of 1934

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ANNEXON, INC.

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement if Other Than the Registrant)

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Your Vote Counts! ANNEXON, INC. 2021 Annual Meeting of Stockholders Vote by June 1, 2021 11:59 PM ET ANNEXON, INC. 180 KIMBALL WAY, SUITE 200 SOUTH SAN FRANCISCO, CA 94080 D51840-P56076 You invested in ANNEXON, 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 via the Internet on June 2, 2021 at 9:00 a.m. Pacific Time at www.virtualshareholdermeeting.com/ANNX2021. Get informed before you vote View the Notice, 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 19, 2021. 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 Virtually at the Meeting June 2, 2021 9:00 a.m. Pacific Time Virtually at: www.virtualshareholdermeeting.com/ANNX2021 Please check the meeting materials for any special requirements for meeting attendance. V1

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 on these important matters. We encourage you to access and review all of the important information contained in the proxy materials before voting. Board Recommends Voting Items 1. Election of Class I Directors to serve until the 2024 Annual Meeting of Stockholders, and until their respective successors have been duly elected and qualified. Nominees: For 01) William H. Carson, M.D. 02) Muneer A. Satter 2. To ratify the appointment of KPMG LLP as our independent registered public accounting firm for the fiscal year ending For December 31, 2021. NOTE: The proxies may vote in their discretion upon any other matters as may properly come before the meeting or any adjournments, continuations or postponements thereof. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. D51841-P56076