SEC Form DEFA14A filed by Coherus BioSciences Inc.

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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

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No fee required.

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Fee paid previously with preliminary materials.

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Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.com Control # V74648-P33439 Your Vote Counts! COHERUS BIOSCIENCES, INC. 333 TWIN DOLPHIN DRIVE SUITE 600 REDWOOD CITY, CA 94065 COHERUS BIOSCIENCES, INC. 2025 Annual Meeting Vote by June 10, 2025 11:59 PM ET You invested in COHERUS BIOSCIENCES, 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 11, 2025. Vote Virtually at the Meeting* June 11, 2025 1:30 p.m. PDT Virtually at: www.virtualshareholdermeeting.com/CHRS2025 *Please check the meeting materials for any special requirements for meeting attendance. 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 28, 2025. 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.

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. Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”. Voting Items Board Recommends V74649-P33439 1. To elect three Class II directors to hold office until the 2028 Annual Meeting of Stockholders or until their successors are elected. For Nominees: 01) Jill O’Donnell-Tormey, Ph.D. 02) Michael Ryan 03) Ali J. Satvat 2. To ratify the selection, by the Audit Committee of our Board of Directors, of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025. For 3. To vote on a non-binding, advisory basis to approve the compensation of the Company’s named executive officers (a “Say-on-Pay” vote). For 4. To approve the amendment to the Company’s 2014 Employee Stock Purchase Plan (the “ESPP Amendment”). For NOTE: The proxies may vote in their discretion upon such other business as may properly come before the meeting or any adjournment, continuation or postponement thereof.